I-1 SLIDE GUIDE STROKE BALL SPLINE ROTARY BALL SPLINE BALL SPLINE TOPBALL PRODUCTS SLIDE BUSH SLIDE UNIT SLIDEROTARYBUSH STROKE BUSH SLIDE SHAFT

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1 ROTARY STROKE I-1

2 NB's BG type is a compact single axis actuator which integrates a slide guide and precision ball screw. BG type offers compact dimensions and outperforms conventional positioning tables. This is made possible by a unique "U" shaped guide rail and slide block which provides multiple functions of a guide block and a ball screw nut combined into a single unit. The "U" shaped guide rail design offers a high rigid structure resistant to bending. This structural feature allows for integrated framework of machinery or equipment and may be one-end supported. Additionally, the slide block contains 4 ball circuits which delivers high load capacity, high accuracy and high rigidity. Figure I-1 Structure of BG type damper guide rail housing grease fitting slide block dust cover ball screw shaft coupling cover side seal top cover sub table motor bracket I-2

3 ADVANTAGES Adjustment Free: The integration of the slide guide and precision ball screw eliminates complex precision adjustment and reduces installation time dramatically. High Rigidity: "U" shaped guide rail provides very high rigidity despite its compact configuration and can be used for one-end supported application.(reference Page I-9) High Accuracy: BG type contains four ball circuits and four-point contact ball grooves which contributes to its high rigidity. The combination of precision ground guide rail, slide block and precision ball screw provides high positioning accuracy. Figure I-2 Ball Contact View ROTARY STROKE Space Saving: In comparison to conventional positioning tables, the BG type allows for compact designs and dramatic space saving. The "U" shaped guide rail and integrated slide block / precision ball screw nut make this possible. Figure I-3 Cross Sectional View I-3

4 PART NUMBER SYSTEM Part number for BG type is described as follows. BG 2 1 A 5 B 1 2 H P A A1 A3 A4 A5 A6 A7 A A9 R C S K P G RD PNP BG type size ball screw lead type of block A B C with 1 long block with 2 long blocks with 1 short block BG 26 2 A 5 B H P A A1 A3 A5 A6 A7 A A9 R C S K P G RD PNP D with 2 short blocks Driver block is located closest to motor mount bracket side. guide rail length precision grade H P high grade precision grade BG BG A B C D A B C D H P H P A A1 A2 A3 A4 A5 B1 R RA RB A A1 A2 A3 A4 B C D R RA RB RC C C S H K S H K P G RD PNP P G RD PNP motor bracket (refer to page I-) The number in the square,,after suffix RA, RB or RC indicates the mounting direction. cover none without top-cover C with top-cover Sensor none without sensor S with slim type photo sensor H with close contact type photo sensor K with proximity sensor Option none P G RD PNP without option with positioning pin hole ( 1) with grease option ( 2) with raydent treatment ( 3) with PNP sensor ( 4) BG 55 2 A B H P A A1 A2 A3 A4 R C S H K P G RD PNP Case of multiple option, add + between each option Example:(PS+RD+PNP) 1, portion is S or W (see page I-3) 2, portion is K, U, L or F (see page I-16) Grease put in Guide, Ball screw, and Angular Bearing portion 3, Apply it except aluminum parts and radial bearing 4, Apply it except BG 2 and 26 I-4

5 BG Type is categorized as either high grade or precision grade (P). Table I-1 Specification part number BG21 BG25 BG262 BG265 BG335 BG331 BG461 BG462 BG552 precision grade high precision high precision high precision high precision high precision high precision high precision high precision high precision radial clearance m basic dynamic load basic static load C CO M P kn kn N m , M2P N m ,35 3,25 5,465 allowable M Y static N m ,297 moment M2Y N m ,233 3,914 6,513 MR N m ,612 2,71 M2R N m , 3,224 5,42 basic dynamic load basic static load C CO MP M2P kn kn N m N m ,336 allowable MY N m static moment M2Y N m 439 1,593 MR N m M2R N m 5 1,14 shaft diameter mm lead mm spacer-ball ratio basic dynamic load Ca kn basic static load Coa kn part Number basic dynamic load Cb kn AC5-14DF 1.31 AC6-16DF MDF/GMP T2DF/GMP T2DF/GMP basic static load Cob kn guide short block long block ball screw bearing support SPECIFICATION *Please contact NB for details when using BG2-P & BG26-P grade series with short and frequent stroke. (Stroke distance : BG21 7 mm or less, BG25 25 mm or less, BG mm or less and BG mm or less) ROTARY STROKE Figure I-4 Direction of Moment M2P and M2Y account for the allowable static moment when 2 blocks are used together. (As shown in Figure I-4) I-5

6 ALLOWABLE SPEED Allowable speed of BG type is subject to the type of motor and operating conditions. The speed may also be limited by the critical speed of the ball screw. Use caution when operating at high speeds or using long rails. Table I-2 Allowable Speed rail length part number mm 1 BG BG BG BG BG speed mm/sec part number BG331 BG461 Figure I-5 Guide Rail Length and Allowable Speed rail length mm speed mm/sec 1, part number BG462 BG552 rail length mm , 1,1 1,2 1,3 speed mm/sec 1,4 1,3 1, , allowable speed mm/sec BG25 BG265 BG262 BG21 guide rail length mm I-6

7 MASS The mass of the BG type is listed in Table I-3 and slide block mass is listed in Table I-4. Table I-3 Mass of BG type Actuator without top-cover with top-cover rail length long block short block long block short block part number mm 1block 2block 1block 2block 1block 2block 1block 2block A B C D A B C D BG2 BG26 BG33 unit / kg rail length mm ROTARY STROKE BG46 BG55 Table I-4 Mass of Blocks unit / kg without top-cover with top-cover part number long block short block long block short block BG BG BG BG BG Mass stated "with top-cover" includes mass of auxiliary table. I-7

8 INERTIA Inertia of the slide block and ball screw of BG type are shown in Table I-5. Table I-5 Inertia unit / kg m 2 without top-cover with top-cover part rail length long block short block long block short block rail length number mm-7 1block A 2block B 1block C 2block D 1block A 2block B 1block C 2block D mm BG BG BG BG BG BG BG , ,4 1, ,14 1, , BG , ,4 1, ,14 1, , , , BG552 1, ,1 1, ,2 1, ,3 I-

9 block defelection (mm) RIGIDITY By utilizing four-point contact structure, the BG type provides extremely high rigidity. Figure I-6 shows deflection of each size of long block against radial load. Table I-6. shows the geometrical moment inertia of guide rails. Figure I-6 Block Deflection against Radial Load BG2A BG26A BG33A BG26A BG55A ROTARY STROKE load (N) Table I-6 Geometrical Moment Inertia of Guide Rails part geometrical moment inertia ( mm 4 ) mass number IX(X Axis) IY(Y Axis) (kg/1mm) BG BG BG BG BG I-9

10 ACCURACY Table I-7 shows accuracy of BG type. Table I-7 Accuracy part number rail length 1 positioning repeatability m positioning accuracy m running parallelism m backlash m starting torque m high precision high precision high precision high precision high precision BG BG BG BG ,4 5 1,14 1, , BG 55 1, ,2 1 1,3 Above values are measured in conditions using our selected motors. Above specifications are based on using NB standard grease. other grease may cause deviations. I-1

11 Positioning Repeatability: Establish an arbitrary point. From one end, position the inner block at this point and measure the stop position. Repeat the positioning and measurement process 7 times. Repeat the same process with respect to the established set point at the midpoint and near both ends of travel. Take the maximum measurement and divide the maximum difference by 2 and indicate it with either a positive or negative sign as the test results. Positioning Repeatability= 1/2{(Maximum value of n)-(minimum value of n)} Positioning Accuracy: Positioning is performed in only one direction and the resulting position is set as the reference measurement point. Calculate the difference between the length of actual travel and the commanded travel length. Continuing in the same direction (without returning to the start point) repeat this process randomly several times until reaching limit of full stroke. Express the accuracy by the absolute maximum difference. Positioning accuracy = ( n)max Figure I-7 Positioning Repeatability Figure I- Positioning Accuracy = (actual movement distance) -(instructed distance) Figure I-9 Running Parallelism movement distance ROTARY STROKE Running Parallelism: Making sure that the surface plate is absolutely flat. Indicator placed on the center of block, run the block over the entire length of travel and use the maximum difference in readings as the test results. Backlash: Use the feed screw to move the block a little. Take the test indicator reading and make it the reference point. While in this position, load the block in the same direction without using the feed screw. Release the load and read the return. Calculate the difference between the reference point. Repeat the same process at the midpoint and near both ends. Use the maximum difference as the test result. Backlash = ( )max I-11 Figure I-1 Backlash feed rate by feed screw return load displacement

12 RATED LIFE To obtain the rated life of the BG type, calculate the rated life of the guide section, and ball screw section or support section. Use the minimum value as the rated life of the BG type. Use the following equation for calculating the rated life. Table I- Contact Coefficient (fc) number of blocks used in close contact on one axis 1 2 contact coefficient (fc) 1..1 A. Life of Guide portion Use the following formula for calculating the rated life of Guide portion. fc C fw PT 3 LG= 5 (1) LG : Rated life (km) fc : contact coefficient (see Table I-) fw : load coefficient (see Table I-9) C : basic dynamic load rating (N) PT : calculated load applied to one block (N) A.1. Calculation of PT Before calculating the rated life using the equation (1), the calculated load applied to one block (PT) needs to be obtained in consideration of the moment load, etc. that will be actually applied. For rapidly-accelerating or short stroke motion, PT needs to be calculated with acceleration taken into consideration. The calculation of this acceleration will be carried out for the mass applied to BG. Obtain the calculated load during uniform motion, accelerating, and decelerating, and use the average value of the three as PT. For the calculation of PT, select an appropriate equation depending on the installation conditions of the guide. It is also possible to calculate PT without including the effect of acceleration by using the equation PT = PTc (see the equations (2), (5), and ()). In this case, however, the obtained value is an approximate one, so a selection with sufficient margin is recommended. Table I-9 Load Coefficient (fw) use conditions vibration, impact velocity none low high m/min. or less 6 m/min. or less 6 m/min. or more Table I-1 Moment Equivalent Coefficient BG2 BG2 BG26 BG26 BG33 BG33 BG33 BG33 BG46 BG46 BG46 BG46 BG55 BG55 Ep(E2p) Ey(E2p) load coefficient (fw) Er(E2r) * For the two-block specifications, the coefficient is that measured when the two blocks are in close contact. I-12

13 A.1.a PT for Horizontal Move (Horizontal Mounting) )during uniform motion(ptc) Figure I-11 ROTARY STROKE PTC= 1 n W+Ep MpL+Ey MyL+Er MrL (2) )during accelerating(pta) 1 PTa= W+Ep(MpL+m a Z)+Ey(MyL+m a X)+Er MrL (3) n Note that the values of (MpL + m a Z) and (MyL + m a X) will be treated as (zero) when the calculated value is negative. )during decelerating(ptd) 1 PTd= n W+Ep(Mpl+m - d Z)+Ey(Mpl+m - d X)+Er MrL (4) Note that the values of (Mpl + m - d Z) and (Mpl + m - d X) will be treated as (zero) when the calculated value is negative. Z Y X W(m) A.1.b PT for Horizontal Move (Wall Mounting) )during uniform motion(ptc) PTC= 1 W+Ep MpL+Ey MyL+Er MrL (5) 1.19 n )during accelerating(pta) Figure I-12 1 PTa= W+Ep(MpL+m d Z)+Ey(MyL+m d X)+Er MrL (6) 1.19 n Note that the values of (MpL + m d Z) and (MyL + m d X) will be treated as (zero) when the calculated value is negative. Z X Y )during decelerating(ptd) 1 PTd= W+Ep(MpL+m - d Z)+Ey(MyL+m - d X)+Er MrL (7) 1.19 n Note that the values of (Mpl + m - d Z) and (Mpl + m - d X) will be treated as (zero) when the calculated value is negative. W(m) I-13

14 A.1.c. PT for Vertical Move ) during uniform motion(ptc) Figure I-13 PTC=Ep MpL+Ey MyL+Er MrL () )during accelerating(pta) PTa=Ep(MpL+m a Z)+Ey(MyL+m a X)+Er MrL(9) Note that the values of (MpL + m a Z) and (MyL + m a X) will be treated as (zero) when the calculated value is negative. Y X )during decelerating(ptd) Z PTd=Ep(MpL+m - d Z)+Ey(MyL+m - d X)+Er MrL (1) W(m) Note that the values of (Mpl + m - d Z) and (MyL + m - d X) will be treated as (zero) when the calculated value is negative. PTC:calculated load applied to a block during uniform motion (N) PTa:calculated load applied to a block during accelerating (N) PTd:calculated load applied to a block during decelerating (N) n:number of blocks of BG W:applied load (N) m:carrying mass (kg) a:acceleration during accelerating (m/s 2 ) d:acceleration during decelerating (m/s 2 ) X:distance between the center of BG and the center of the carrying mass (mm) Y:distance between the center of BG and the center of the carrying mass (mm) Z:distance between the center of BG ball screw and the center of the carrying mass (mm) Ep:moment equivalent coefficient in the pitching direction (see Table I-1) Ey:moment equivalent coefficient in the yawing direction (see Table I-1) Er:moment equivalent coefficient in the rolling direction (see Table I-1) MpL:loaded moment in the pitching direction (N m)mpl=w Z MyL:loaded moment in the yawing direction (N m)myl=w X MrL:loaded moment in the rolling direction (N m)mrl=w Y * See Fig.I-4 for the direction of moment. A.1.d. Obtain the calculated load applied to a block (PT) by calculating the average load of each motion using an appropriate equation among those shown above according to the application. 3 1 PT = (PTa 3 S1+PTc 3 S2+PTd 3 S3) (11) (S1+S2+S3) Figure I-14 velocity (mm/s) travel distance during acceleration (S1) V travel distance during uniform motion (S2) travel distance during deceleration (S3) PT:calculated load applied to one block (N) S1:travel distance during accelerating (mm) (see Table I-14) S2:travel distance during uniform motion (mm) (see Table I-14) S3:travel distance during decelerating (mm) (see Table I-14) PTa:calculated load applied to one block during accelerating (N) : equation (3), (6), and (9) PTC:calculated load applied to one block during uniform motion (N) : equation (2), (5), and () PTd:calculated load applied to one block during decelerating (N) : equation (4), (7), and (1) B. Life of the Ball Screw and Support Bearing The life of ball screws and support bearings can be calculated using a common equation, as shown below. Compare the dynamic load rating of the ball screw and the support bearing and apply smaller value for calculation. La= 1 Ca or Cb fw 3 (12) Pa B. 1. Calculation of Pa Before calculating the life using the equation (12), calculate Pa with acceleration taken into consideration. Calculate the load in each axis direction during uniform motion, accelerating, and decelerating and the obtained value is used as Pa. T1 La:rated life (km) fw:load coefficient (see Table I-9) Ca:basic dynamic load rating of the ball screw (N) Cb:basic dynamic load rating of the support bearing (N) Pa:axis-directional load (N) :ball screw lead (mm) T2 T T3 time (s) I-14

15 B.1.a For Horizontal Move ) during uniform motion(pac) Pac= W+F+fb n (13) )during accelerating(paa) Paa= W+F+fb n+(m+mb n) a (14) )during decelerating(pad) Pad= W+F+fb n-(m+mb n) d() B.1.b For Vertical Move ) during uniform motion(pac) Pac=(m+mb n)g+f+fb n (16) )during accelerating(paa) Paa=(m+mb n)g+f+fb n+(m+mb n) a (17) )during decelerating(pad) Table I-11 Sliding Resistance (fb) of a Single Block (Seal Resistance) BG2 BG26 BG33 BG46 BG55 high class (H) Pac:axis-directional load rating during uniform motion (N) Paa:axis-directional load rating during accelerating (N) Pad:axis-directional load rating during decelerating (N) :friction coefficient W:load applied to a block (N) F:external force (load) applied to the axis direction (N) fb:sliding resistance of a single block (N) (see Table I-11) n:number of blocks of BG m:carrying mass (kg) mb:mass of a block of BG (kg) (see Table I-4) a:acceleration during accelerating (m/s 3 ) d:acceleration during decelerating (m/s 3 ) 9 unit: N precision class (P) ROTARY STROKE Pad=(m+mb n)g+f+fb n-(m+mb n) d (1) B.1.c. Obtain the average axis-directional load (Pa) using an appropriate formula among those shown above depending on the application. 3 1 Pa = ( Paa 3 S1+ Pac 3 S2+ Pad (11) 3 S3) (S1+S2+S3) Pa:average axis-directional load (N) S1:travel distance during accelerating (mm) (see Table I-14) S2:travel distance during uniform motion (mm) (see Table I-14) S3:travel distance during decelerating (mm) (see Table I-14) Paa:axis-directional load during accelerating (N): formulas (14) and (17) Pac:axis-directional load during uniform motion (N): formulas (13) and (16) Pad:axis-directional load during decelerating (N): formulas () and (1) I-

16 LUBRICATION BG type contains a lithium-soap based grease. Apply similar grade of grease for the lubrication as required depending on your terms of operation. Use grease fitting to lubricate the guide block. For ball screw apply grease directly to surface of screw shaft. Unless otherwise instructed, a grease fitting is located as shown in Figure I-. The greases can be changed to a high-function type by adding a special grease option code at the end of the part number. Please refer to Table I-12 for the type of the greases. Also refer to page Eng- 2 for further detail of greases. Figure I- Location of Grease Fitting single block grease fitting double block grease fitting Motor End Table I-12 Applicable Greases grease option code features product name none (standard) GK GU GL urea-type low dust generation grease urea-type low dust generation grease; low sliding resistance lithium-type low dust generation grease Multemp PS No.2 (KYODO YUSHI) K Grease KGU Grease KGL Grease grease fitting GF urea-type anti-fretting grease KGF Grease OPERATING TEMPERATURE Resin parts are assembled in BG type. The recommended ambient working temperature is or lower. Apply 55 or lower for photo micro sensor option type. PRECAUTION FOR USE Handle as a precision component to avoid excessive vibration or shock. Rough handling will affect the smooth traveling and may reduce the precision performance and/or life of the BG type. DO NOT DISASSEMBLE. The accuracy of BG type is adjusted by the factory when it is assembled. Allow for extra stroke distance. If the guide block repeatedly collides with damper, it may cause damage. Depending upon the operating environment, dust and debris may contaminate BG type and disrupt the ideal ball circulation and operating performance. I-16

17 MOTOR BRACKET CONFIGURATIONS & APPLICABLE MOTORS NB provides optional motor mount brackets to easily install most popular motors. Table I-13 Applicable motors Applicable motors Part number BG2 BG26 BG33 BG46 BG55 MSMA3AZ 3W MATSUSHITA MSMA5AZ 5W A3 A3 A2 C MSMA1 1W ELECTRIC MSMA2 2W MSMA4 4W A2 MSMA 75W A3 A2 HC-AQ135 1W HC-AQ235 2W A A HC-AQ335 3W HC-KFS(MFS,PQ)53 5W A1 A1 A1 B HC-KFS(MFS,PQ)13 1W MITSUBISHI HC-KFS(MFS,PQ)23 2W A1 A ELECTRIC HC-KFS(MFS,PQ)43 4W HC-KFS(MFS)73 75W A4 A1 HA-FF53 5W HA-FF13 1W A3 A HA-FF23 2W HA-FF33 3W A3 A2 SGMM-A131* 1W SGMM-A231* 2W A9 A9 SGMM-A331* 3W AC SGMAH-A3 3W YASUKAWA SGMAS(SGMAH)-A5 5W A1 A1 A1 B Servo motor ELECTRIC SGMAS(SGMAH)-1 1W SGMAS-C2 W SGMAS(SGMAH)-2 2W A1 A SGMAS(SGMAH)-4 4W SGMAS(SGMAH)- 75W A4 A1 Q1AA43D 3W Q1AA45D 5W A1 A1 A1 B Q1AA41D 1W Q1AA62D 2W Q1AA64D 4W A1 A SANYO Q1AA775D 75W A4 A1 Q2AA55D 5W ELECTRIC A3 A Q2AA51D 1W Q2AA72D 2W Q2AA73D 3W A3 A2 Q2AA74D 4W Q2AA5D 5W Q2AA75D 75W A3 CHIBA EA-21 6W EA W A4 PRECISION EA W EA-25 2W A7 A7 UPD534M-A A5 A5 Stepper motor ORIENTAL PMU33AH A6 A6 UPK(RK)54,AS4 A5 A5 B1 MOTOR UPK(RK)56,AS6 A4 D UPK(RK)59,AS9 A4 PK26 A5 NB can provide other motor mount brackets. Please contact your NB representative for details. I-17 ROTARY STROKE

18 BG2 Figures inside( Motor Bracket A ) indicates mass of the motor mount adapter plate M3 Depth6 P.C.D.29 Motor Bracket A6 (Mass:1g) Thru 5C'bore.Depth3 (opposite side) 4h Thru Motor Bracket A1 (Mass:3g) Motor Bracket A7 (Mass: g) M4 Depth6 P.C.D Motor Bracket A3 (Mass:39g) Motor Bracket A (Mass:12g) M3 Depth6 P.C.D M2.5 Depth6 P.C.D Thru 6C'bore.Depth4 (opposite side) Motor Bracket A4 (Mass: 5g) Motor Bracket A9 (Mass:14g) Motor Bracket A5 (Mass:26g) For configurations A4 A5 A6,A7and A9 attach intermediate flange to motor first. I-1

19 BG26 ROTARY STROKE Figures inside( Motor Bracket A h6 52 ) indicates mass of the motor mount adapter plate Thru Motor Bracket A1 (Mass:2g) M3 Depth6 4-M4 Depth1.5 P.C.D.46 Motor Bracket A6 (Mass:16g) Motor Bracket A7 (Mass: g) Thru 5C'bore.Depth3 (opposite side) Motor Bracket A3 (Mass:24g) Motor Bracket A (Mass:21g) M3 Depth1.5 P.C.D M2.5 Depth6 P.C.D Motor Bracket A5 (Mass:32g) Motor Bracket A9 (Mass:21g) Thru 6C'bore.Depth4 (opposite side) For configurations A4 A5 A6,A7and A9 attach intermediate flange to motor first. I

20 BG33 Figures inside( ) indicates mass of the motor mount adapter plate. Motor Bracket A M4 Depth 9 1 6h M3 Depth P.C.D H 44.5 P.C.D.4 2-M4 Depth 4 5 Motor Bracket A1 (Mass:66 ) Motor Bracket A4 (Mass:212 ) M4 Depth M4 Depth P.C.D.46 Motor Bracket A2 (Mass:67 ) Motor Bracket A5 (Mass:125 ) M3 Depth M4 Depth P.C.D Motor Bracket A3 (Mass:133 ) Motor Bracket B1 (Mass:111 ) M4 Depth Thru 6C'bore.Depth3.5 (opposite side) P.C.D.6 For configuration of B1,attach intermediate flange to motor first. I-2

21 BG46 ROTARY STROKE Figures inside( ) indicates mass of the motor mount adapter plate. Motor Bracket A Motor Bracket A4(Mass:62 ) -M4 Depth h6 46 5H Motor Bracket A1 (Mass:13 ) M5 Depth P.C.D.6 P.C.D.7 Motor Bracket B 4-M5 Depth H M4 Depth 9 9 P.C.D.9 P.C.D.46 Motor Bracket A2 (Mass:16 ) Motor Bracket C 4-M4 Depth H 62 9 P.C.D H 4-M3 Depth 9 P.C.D.45 Motor Bracket A3 (Mass:44 ) 4-M5 Depth P.C.D.9 Motor Bracket D M4 Depth 36H I-21 5

22 BG55 Figures inside( ) indicates mass of the motor mount adapter plate. Motor Bracket A H 4-M5 Depth P.C.D h Motor Bracket A1 (Mass:329 ) Motor Bracket A3 (Mass:399 ) M6 Depth12 9 P.C.D M6 Depth12 9 P.C.D Motor Bracket A2 (Mass:333 ) Motor Bracket A4 (Mass:449 ) M5 Depth12 9 P.C.D M6 Depth I-22

23 EXPOSED BRACKET For the BG type, Exposed brackets with the motor end of the ball screw shaft exposed are available. When using a motor unable to be mounted using a standard motor bracket or intermediate flange, make an original bracket and connect it to the exposed bracket. BG2 Exposed Bracket R M3 depth h6 1h ROTARY STROKE can be used for both with cover and sensor. 2. Mass is reduced.4kg from the value of Table I-3, page I-7. C1 4.3 BG26 Exposed Bracket R M3 depth h can be used for both with cover and sensor. 2. Mass is reduced.kg from the value of Table I-3, page I-7. C1 2h I

24 BG33 Exposed Bracket R h6 4-M4 Depth Helical inserts 1. can be used for both with cover and sensor. 2. Mass is reduced.1kg from the value of Table I-3, page I-7. 3h BG46 Exposed Bracket R h6 4-M5 Depth1 Helical inserts can be used for both with cover and sensor. 2. Mass is reduced.3kg from the value of Table I-3, page I-7. 4h I-24

25 BG55 Exposed Bracket R ROTARY STROKE can be used for both with cover and sensor. 2. Mass is reduced.3kg from the value of Table I-3, page I h6 45h 4-M5 Depth (Helical inserts) I-25

26 RETURN PULLEY UNIT Return pulley units in which a motor is connected with a timing belt are available for BG type. Its return structure allows the reduction of total length (available for BG33 and BG46 types). BG33 Return Pulley Unit tension plate A mounting direction code mounting direction code mounting direction code A where tension plate is not allowed to be exposed Td d Tension Td =1.9N d=1.1mm mounting direction code 9 cross section A-A 1.This drawing shows RA for MSMA1(Panasonic). 2.Installation position of Pulley Unit can be selected at 9 intervals (mounting direction code). 3.Can be used for both with or without cover and / or sensor. 4.Tension plate can be built in and is not exposed. 5.Mass is added.2kg to the value of Table I-3, page I-7. 6.Inertia is added kg m 2 to the value of Table I-5, page I-. 7.part number format BG33 / Symbol of applicable motor bracket (see table I-14) Mounting direction code (refer to cross section A-A) Table I-14 Motor Bracket Configurations Motor Bracket Applicable Motors RA MATSUSHITA ELECTRIC INDUSTRIAL MINAS SERIES :5~1W YASUKAWA ELECTRIC SIGMA SERIES :5~1W RB MITSUBISHI ELECTRIC HC-MF SERIES :5~1W SANYO ELECTRIC P3 SERIES :5~1W Please contact NB for return brackets for other stepper motors. I-26

27 ROTARY STROKE BG46 Return Pulley Unit 6 Tension plate 94 A 2 12 A 34 mounting direction Where tension plate is not allowed to be exposed mounting direction mounting direction This drawing shows RA for MSMA1(Panasonic). 2.Installation position of Pulley Unit can be selected at 9 intervals (mounting direction code). 3.Can be used for both with or without cover and / or sensor. 4.Tension plate can be built in and is not exposed. 5.Mass is added.7kg to the value of Table I-3, page I-7. 6.Inertia is added kg m 2 to the value of Table I-5, page I-. 7.parts number format BG33 / Symbol of applicable motor bracket (see table I-) Mounting direction code (refer to cross section A-A) Td d Tension Td=2.9N d=1.6mm mounting direction 9 cross section A-A Table I- Motor Bracket Configurations Motor Bracket Applicable Motors RA MATSUSHITA ELECTRIC INDUSTRIAL MINAS SERIES : 2W YASUKAWA ELECTRIC SIGMA SERIES : 2W RB MITSUBISHI ELECTRIC HC-MF SERIES : 2W SANYO ELECTRIC P3 SERIES : 2W RC ORIENTAL MOTOR STEPPER MOTOR 6 SERIES Please contact NB for return brackets for other stepper motors. I-27

28 BG2 SENSOR Photo-sensor or proximity-sensor may be attached to the BG actuator with our optional sensor-mounting rail. Tapped holes are machined on both side of guide rail, allowing attachment of sensor to either side. Standard positioning (without special instruction from customer) would be to the left of the motor mount end. Sensor option includes the items that are listed below. S Specification (Compact Photo Micro Sensor) Without Cover 1 photo micro sensor min sensor mounting plate 2 With Cover Accessories micro photo sensor (PM-L24, SUNX) 3 pcs sensor mounting plate 3 pcs 1 pc 1 pc sensor mounting plate K Specification (Proximity Sensor) Without Cover proximity sensor APM-D3B1 1 proximity sensor (different frequency type) APM-D3B1F proximity sensor APM-D3B1 1 min (combination with the diferent frequency type) With Cover 1 1 Accessories proximity sensor (APM-D3B1, YAMATAKE) 2 pcs proximity sensor (different frequency type)(apm-d3b1f, YAMATAKE) 1 pc 1 pc 1 pc I-2

29 ROTARY STROKE BG26 S Specification (Compact Photo Micro Sensor) Without Cover With Cover photo micro sensor min sensor mounting plate 5 Accessories micro photo sensor (PM-L24, SUNX) 3 pcs sensor mounting plate 3 pcs 1 pc 1 pc K Specification (Proximity Sensor) Without Cover proximity sensor APM-D3B1 With Cover proximity sensor (different frequency type) APM-D3B1F proximity sensor APM-D3B min (combination with the different frequency type) sensor mounting plate Accessories proximity sensor (APM-D3B1, YAMATAKE) 2 pcs proximity sensor (different frequency type)(apm-d3b1f, YAMATAKE) 1 pc 1 pc 1 pc I

30 BG33 S Specification (Slim-Type Photo Micro Sensor) Without Cover Long Block micro photo sensor connector.5 31 min21.5 Short Block With Cover Long Block Short Block Accessories photo micro sensor (EE-SX674, OMRON) 3 pcs connector (EE-11, OMRON) 3 pcs 1 pc *1 pc * 2 pcs for BG33D-. I-3

31 ROTARY STROKE BG33 H Specification (Close Contact Capable Photo Micro Sensor) Without Cover micro photo sensor Long Block connector min sensor mounting plate Short Block With Cover Long Block Short Block Accessories photo micro sensor (EE-SX671, OMRON) 3 pcs connector (EE-11, OMRON) 3 pcs sensor mounting plate (only for the without cover type) 3 pcs 1 pc *1 pcs * 2 pcs for BG33D-. I-31

32 BG33 K Specification (Proximity Sensor) Without Cover Long Block proximity sensor APM-D3B1 proximity sensor (different frequency type) APM-D3B1F proximity sensor APM-D3B1 13 min (combination with the different frequency type) Short Block With Cover Long Block Short Block Accessories proximity sensor (APM-D3B1, YAMATAKE) 2 pcs proximity sensor (different frequency type)(apm-d3b1f, YAMATAKE) 1 pc 1 pc *1 pc * 2 pcs for BG33D-. I-32

33 ROTARY STROKE BG46 S Specification (Slim-Type Photo Micro Sensor) Without Cover Long Block 7 Short Block micro photo sensor connector min With Cover Long Block Short Block 7 2 Accessories photo micro sensor (EE-SX674, OMRON) connector (EE-11, OMRON) 3 pcs 3 pcs 1 pc 1 pc I-33

34 BG46 H Specification (Close Contact Capable Photo Micro Sensor) Without Cover Long Block micro photo sensor connector min Short Block With Cover Long Block Short Block 27.4 Accessories photo micro sensor (EE-SX671, OMRON) connector (EE-11, OMRON) 3 pcs 3 pcs 1 pc 1 pcs I-34

35 ROTARY STROKE BG46 K Specification (Proximity Sensor) Without Cover Long Block proximity sensor APM-D3B1 proximity sensor (different frequency type) APM-D3B1F proximity sensor APM-D3B min (combination with the different frequency type) Short Block 7 With Cover Long Block 14.5 Short Block Accessories proximity sensor (APM-D3B1, YAMATAKE) 2 pcs proximity sensor (different frequency type)(apm-d3b1f, YAMATAKE) 1 pc 1 pc 1 pc I-35

36 BG55 S Specification (Compact Photo Micro Sensor) Without Cover 2 photo micro sensor connector.5 With Cover H Specification (Close Contact Capable Photo Micro Sensor) Without Cover min21 2 Accessories photo micro sensor (EE-SX674, OMRON) 3 pcs connector (EE-11, OMRON) 3 pcs 1 pc 1 pc photo micro sensor connector With Cover 2 min Accessories photo micro sensor (EE-SX671, OMRON) connector (EE-11, OMRON) 3 pcs 3 pcs 1 pc 1 pc I-36

37 ROTARY STROKE BG55 K Specification (Proximity Sensor) Without Cover 2 proximity sensor APM-D3B1 proximity sensor (different frequency type) APM-D3B1F proximity sensor APM-D3B1 17 min (combination with the different frequency type) With Cover 2 Accessories proximity sensor (APM-D3B1, YAMATAKE) 2 pcs proximity sensor (different frequency type)(apm-d3b1f, YAMATAKE) 1 pc 1 pc 1 pc 17 <PNP Sensor> The BG type sensors can be changed to the PNP type by adding a sensor option code PNP at the end of the part number (excluding the BG2 and BG26 compact photo micro sensors). Refer to Table I-16 for the model number of PNP type sensors. Table I-16 Sensor Model Type sensor code S H K sensor type slim-type photo micro sensor compact photo micro sensor close contact capable photo micro sensor proximity sensor proximity sensor (different frequency type) applicable model type BG33,BG46,BG55 BG2,BG26 BG33,BG46,BG55 all model types all model types I-37 standard specification model type EE-SX674 PM-L24 EE-SX671 APM-D3B1 APM-D3B1F PNP specification model type EE-SX674P not available EE-SX671P APM-D3E1 APM-D3E1F

38 POSITIONING PIN HOLE For the BG type, positioning pin holes can be provided on the slide block or the sub-table by adding the option code PS or PW at the end of the part number. When two blocks are used in the BG, the both blocks will be processed. It is useful when exacting reassembly positioning is required. When the code PS is added, the drilling is processed only on the mounting surface. On the other hand, when the code PW is specified for a BG with a cover, straight pins will be used at the connecting area of the slide block and the sub table (although the position is the same as the for PS ). Note that only hole drilling is processed to the mounting surface and that no straight pin will be attached. BG2A,B For the two-block type, the both blocks will be processed. Without Cover With Cover Depth 5 11 Applied only to the PW specification Depth 5 motor end motor end For some cases, a shallow counter-bore of 4 will be machined at the entrance of the area with " " to remove a hardened layer. BG26A,B For the two-block type, the both blocks will be processed. Without Cover 6 With Cover Depth Depth 5 44 Applied only to the PW specification motor end motor end For some cases, a shallow counter-bore of 4 will be machined at the entrance of the area with " " to remove a hardened layer. I-3

39 ROTARY STROKE BG33A,B For the two-block type, the both blocks will be processed. Without Cover Depth With Cover Applied only to the PW specification Depth 6 motor end For some cases, a shallow counter-bore of 4 will be machined at the entrance of the area with " " to remove a hardened layer. motor end BG33C,D For the two-block type, the both blocks will be processed. Without Cover With Cover Depth 6 9 motor end For some cases, a shallow counter-bore of 4 will be machined at the entrance of the area with " " to remove a hardened layer. I-39 Applied only to the PW specification Depth motor end

40 BG46A,B For the two-block type, the both blocks will be processed. Without Cover With Cover Depth 6 Applied only to the PW specification Depth 6 motor end motor end For some cases, a shallow counter-bore of 5 will be machined at the entrance of the area with " " to remove a hardened layer. BG46C,D For the two-block type, the both blocks will be processed. Without Cover With Cover Applied only to the PW specification Depth Depth 6 12 motor end 43.5 motor end For some cases, a shallow counter-bore of 5 will be machined at the entrance of the area with " " to remove a hardened layer. I-4

41 ROTARY STROKE BG55A,B For the two-block type, the both blocks will be processed. Without Cover With Cover motor end Depth Depth 6 95 motor end Applied only to the PW specification For some cases, a shallow counter-bore of 5 will be machined at the entrance of the area with " " to remove a hardened layer. I-41

42 BG2A,B -Without Top-Cover- L 2 L 1 49 M1 P1 N P (Min) M3 Depth6 P.C.D h6 P2 N M3 Depth4.5 4-M2 Depth4 5 1 (Depth.9) 2 (M1+1)- 3.4 Thru 6.5C'bore.Depth A B A M2 P2 2 (M2+1)-M2.5Depth5(both sides) 4 section A-A View B(motor bracket A) refer Page I-1 for other motor bracket I-42

43 ROTARY STROKE A 41.(Min) 2 2-M2Depth5(both sides) M4 Depth14 B A 32 4 section A-A View B(motor bracket A) refer Page I-1 for other motor bracket L1 L With Top-Cover- dimensions stroke limit N1 M1 P1 N2 M2 P2 BG2A BG2B Stroke limit is traveling distance between both ends of the dampers. I-43

44 BG26A,B -Without Top-Cover- L2 1 L1 52 M1 P1 N P (Min) (Depth.9) (M2+1)-M2.5Depth5(both sides) 4-M3 Depth6 P.C.D h M4 Depth7 4-M2 Depth (M1+1)- 4.5 Thru C'bore.Depth4.5 A B A P2 4 M2 6 P2 N section A-A View B(motor bracket A) refer Page I-19 for other motor bracket I-44

45 ROTARY STROKE A 4-M4 Depth17 61.(Min) 2 2-M2Depth5(both sides) B A section A-A View B(motor bracket A) refer Page I-19 for other motor bracket L1 L With Top-Cover- dimensions stroke limit N1 M1 P1 N2 M2 P2 BG26A BG26B Stroke limit is traveling distance between both ends of the dampers. I-45

46 BG33A,B -Without Top-Cover- L (Min) L1 M1 P P1 N M4 Depth P.C.D M3 Depth P.C.D h6 2H 4-M5 Depth 4-M2 Depth (Depth1) 2 (M1+1)- 5.5 Thru 9.5C'bore.Depth5 P2 6 M2 P2 N2 2 (M2+1)-M2.5Depth6(both sides) M4 Depth 5 section A-A View B(motor bracket A) refer Page I-2 for other motor bracket I-46

47 77.2(Min) 4-M5 Depth M3 Depth6 (from reverse side) ROTARY STROKE M2 Depth5(both sides) 4 6 section A-A View B(motor bracket A) refer Page I-2 for other motor bracket L1 L With Top-Cover- dimensions stroke limit N1 M1 P1 N2 M2 P2 BG33A BG33B Stroke limit is traveling distance between both ends of the dampers. I-47

48 BG33C,D -Without Top-Cover- L (Min) M1 L1 P P1 N h6 2H 2-M5 Depth (Depth1) " " 4-M2 Depth (M1+1)- 5.5 Thru 9.5C'bore.Depth5 P2 6 M2 P2 N2 2 (M2+1)-M2.5Depth6(both sides) M4 Depth P.C.D M3 Depth P.C.D M4 Depth 5 section A-A View B(motor bracket A) refer Page I-2 for other motor bracket I-4

49 2-M5 Depth 51.9(Min) 74 5 " M2 Depth5 (from reverse side) M2 Depth5(both side) ROTARY STROKE section A-A View B(motor bracket A) refer Page I-2 for other motor bracket L1 L With Top-Cover- dimensions stroke limit N1 M1 P1 N2 M2 P2 BG33C BG33D Stroke limit is traveling distance between both ends of the dampers. I-49

50 BG46A,B -Without Top-Cover- 13 M1 P1 L (Min) P L2 N M4 Depth P.C.D h6 5H 4-M6 Depth12 4-M2 Depth5 46 (Depth1) 2 (M1+1)- 6.6 Thru 11C'bore.Depth6.5 P2 7.5 M2 P2 N2 2 (M2+1)-M2.5Depth6(both sides) 11 6 section A-A 6 View B(motor bracket A) refer Page I-21 for other motor bracket I-5

51 -With Top-Cover- ROTARY STROKE 4-M6 Depth22 4-M5 Depth (Min) M3 Depth6 (from reverse side) section A-A View B(motor bracket A) refer Page I-21 for other motor bracket L1 L ,3.5 1,4 1,13.5 1,14 1,23.5 1,24 1,33.5 dimensions stroke limit N1 M1 P1 N2 M2 P2 BG46A BG46B , ,19 1, Stroke limit is traveling distance between both ends of the dampers. I-51

52 BG46C,D -Without Top-Cover- 13 M1 L1 P1 L (Min) P N M6 Depth (Depth1) 4-M2 Depth5 " " M4 Depth P.C.D h6 5H 2 (M1+1)- 6.6 Thru 11C'bore.Depth6.5 P2 7.5 M2 P2 N2 2 (M2+1)-M2.5Depth6(both sides) 11 6 section A-A 6 View B(motor bracket A) refer Page I-21 for other motor bracket I-52

53 -With Top-Cover- 2-M6 Depth (Min) 1 " " M3 Depth6 (from reverse side) ROTARY STROKE section A-A 11 L ,4 1,14 1, L ,3.5 1,13.5 1,23.5 1,33.5 N1 7 I-53 dimensions M1 P View B(motor bracket A) refer Page I-21 for other motor bracket N2 2 M2 P Stroke limit is traveling distance between both ends of the dampers. stroke limit BG46C BG46D , ,145 1,72

54 BG55A,B -Without Top-Cover- L2 M1 L1 P (Min) P N M5 Depth1 P.C.D h6 5H 4-M Depth 4-M3 Depth6 5 2 (Depth1.5) 2 (M1+1)- 9 Thru 14C'bore.Depth.6 95 P2 1 M2 P2 2 (M2+1)-M3Depth6(both sides) N section A-A View B(motor bracket A) refer Page I-22 for other motor bracket I-54

55 -With Top-Cover- ROTARY STROKE 123(Min) M Depth36 4-M3 Depth6 (from reverse side) section A-A View B(motor bracket A) refer Page I-22 for other motor bracket L1 L dimensions stroke limit N1 M1 P1 N2 M2 P2 BG55A BG55B Stroke limit is traveling distance between both ends of the dampers. I-55