ROTRY I-1
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. dditionally, the slide block contains 4 ball circuits which delivers high load capacity, high accuracy and high rigidity. Figure I-1Structure 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
DVNTGES djustment 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-2) High ccuracy: 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 ROTRY 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
PRT NUMBER SYSTEM Part number for BG type is described as follows. BG 2 1 B 1 1 2 H P 1 2 3 4 5 6 7 C S K GK RD GKRD BG type size ball screw lead type of block with 1 long block B with 2 long blocks C with 1 short block BG 26 2 B 1 2 2 3 H P 1 2 3 5 6 7 C S K GK RD GKRD D with 2 short blocks Driver block is located closest to motor mount bracket side. guide rail length precision grade none high grade P precision grade BG 33 5 1 B C D 1 2 3 6 H P 1 2 3 4 5 B1 R R RB C S GK RD GKRD motor bracket (refer to page I-) The number in the square,,after suffix R, RB or RC indicates the mounting direction. top-cover none without top-cover C with top-cover top-cover and auxiliary table. BG 46 1 2 B C D BG 55 2 B 3 4 5 6 7 9 1 11 12 13 H P H P 1 2 3 B C D R R RB RC 1 2 3 4 5 C C S S GK RD GKRD GK RD GKRD photo-sensor none without sensor S with sensor K with proximity sensor (BG2, 26) surface treatment and special grease none without surface treatment + standard grease GK K-grease (low dust generation lubricant) RD Raydent treatment GKRD K-grease + Raydent treatment 1 K-grease is applied into the portion of guide, ball screw and augular bearing. Please refer to P.Eng-12 for details of K-grease. 2 Raydent treatment is only a steel portion without radial bearing. I-4
BG Type is categorized as either high grade or precision grade (P). Table I-1 Specification part number precision grade high precision high precision high precision high precision high precision high precision high precision high precision high precision radial clearance m -3-6 -3-3 -6-3 -4 - -4-4 - -4-3 -7-3 -3-7 -3-5 -11-5 -5-11 -5-6 -1-6 basic dynamic load basic static load allowable static moment basic dynamic load basic static load allowable static moment shaft diameter C CO M P M2P M Y M2Y MR C CO MP M2P MY M2Y MR kn kn N m N m N m N m N m kn kn N m N m N m N m N m mm 4.1 6. 32 194 3 231 6 7.91 13.1 93 56 111 667 224 11. 19.9 169 1,14 21 1,26 411 5. 9. 42 252 49 294 25 1 27. 45. 572 3,432 61 4,6 1,41 13.5 22.5 143 5 169 1,14 75 15 36. 61.4 91 5,46 1, 6, 2,23 2 lead mm 1 2 5 1 1 2 2 spacer-ball ratio 1 1 1 1 1 1 2 1 2 1 basic dynamic load Ca kn.63 2.6 3.35 2.11 2.2 1.39 4. 2.77 4. 3.36 5. 4.12 basic static load Coa kn 1.34 3.64 5. 2.95 3. 1.75 7. 3.95 7. 5.27 1. 7. part Number basic dynamic load Cb kn C5-14DF.696 C6-16DF 1.3 7MDF/GMP5 4. 71T2DF/GMP5 6.77 72T2DF/GMP5 7.74 basic static load Cob kn.34 1.76 4.36 7.45 9. guide short block long block ball screw bearing support SPECIFICTION BG21 BG25 BG262 BG265 BG335 BG331 BG461 BG462 BG552 M2P and M2Y account for the allowable static moment when 2 blocks are used together. (s shown in Figure I-4) Please contact NB for details when using BG2 & BG26-P grade series with short and frequent stroke. (Stroke distance : BG21 7 mm or less, BG25 25 mm or less, BG262 14 mm or less and BG265 25 mm or less) Figure I-4 Direction of Moment ROTRY I-5
CCURCY Table 2 shows accuracy of BG type. Table I-2 ccuracy 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 2 1 5 3 2 25 1 1 3.5.12 2 1 BG 26 2 2 5 3 2 25 1 1 3.15.4 3 BG 33 1 2 3 5 3 3 15 35 2 25 1 1 3.7.15 6 7 25 35 15 BG 46 3 4 5 6 7 5 3 35 2 25 3 35 15 2 1 3.1.15.17 9 1, 5 35 25 3.17 BG 55 1,1 5 3.12.2 1,2 1 1,3 bove values are measured in conditions using our selected motors. bove specifications are based on using NB standard grease. other grease may cause deviations. I-6
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 ccuracy: 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-5 Positioning Repeatability Figure I-6 Positioning ccuracy = (actual movement distance) -(instructed distance) Figure I-7 Running Parallelism movement distance ROTRY Running Parallelism: Making sure that the surface plate is absolutely flat. Use the test indicator as shown in Figure I-7, 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-7 Figure I- Backlash feed rate by feed screw return load displacement
MOTOR BRCKET CONFIGURTIONS & PPLICBLE MOTORS NB provides optional motor mount brackets to easily install most popular motors. Table I-3 pplicable motors pplicable motors Part number BG2 BG26 BG33 BG46 MSM5BZ21 5W MSM1Z21 1W 2 2 MSM2Z21 2W MTSUSIT MSM3Z 3W MSM5Z W ELECTRIC MSM1 1W 3 3 2 C MSM2 2W MSM4 W 2 MSM 7W HC-KFS(MFS,PQ)53 W HC-KFS(MFS,PQ)13 1W 1 1 1 B HC-KFS(MFS,PQ)23 2W 1 MITSUBISHI HC-KFS(MFS,PQ)43 W HC-KFS(MFS)73 7W ELECTRIC H-FF53 W 3 H-FF13 1W H-FF23 2W H-FF33 3W 3 SGMH(SGML)-3 3W SGMH(SGML)-5 W 1 1 1 B C YSUKW SGMH(SGML)-1 1W Servo motor SGMH(SGML)-2 2W ELECTRIC SGML-3 3W 1 SGMH(SGML)-4 W SGMH- 7W P3B3 3W P3B5 W 1 1 1 B P3B1 1W P3B62 2W P3B6 W 1 SNYO P3B75 7W PB5 W ELECTRIC 3 PB1 1W PB72 2W PB73 3W 3 PB7 W PB W PB75 7W CHIB E-2151 6W E-2169 1W 4 PRECISION E-2565 12W E-2 2W 7 7 UPD534M- 5 5 PMU33H 6 6 Stepper motor ORIENTL UPK(RK)54,S4 5 5 B1 MOTOR UPK(RK)56,S6 4 D UPK(RK)59,S9 PK26 5 NB can provide other motor mount brackets. Please contact your NB representative for details. BG55 2 1 2 1 1 2 3 4 I-
BG2 ROTRY Figures inside( Motor Bracket 26 49 4h6 2 +.5 4-3.4 Thru 29 9.5 Motor Bracket 1 (Mass:3) 49 1.5 ) indicates mass of the motor mount adapter plate. 12 4 12 39 32.4 12.5 4-M3 Depth6 P.C.D.29 4-M4 Depth6 P.C.D.46 Motor Bracket 4 (Mass: 5) Motor Bracket 5 (Mass:26) 49 49 1.5 7 2 1.5 2 22 +.5 1 +.5 35 42 31 14 4.5 2.5 2 24 4-3.4 Thru 6C'bore.Depth4 (opposite side) 16 3 +.5 16 31 42 3.5 Motor Bracket 2 (Mass:14) 2.5 Motor Bracket 6 (Mass:1) 49 6 3.5 1.5 2.5 3.4 1 +.5 P.C.D.16 12 35 24 12 49 1.5 2 5 16 22 +.5 39 23 4-3 Thru 5C'bore.Depth3 (opposite side) 23 29 Motor Bracket 3 (Mass:39) 49 12 1.5 4-M3 Depth6 P.C.D.45 Motor Bracket 7 (Mass: ) 49 3.5 1.5 17 39 5.5 2. 2.2 16 3.5 3 +.5 For configurations 2456 and 7the motor mount adapter plate is required to fit after motor is mounted. I-9 1 +.5 25
BG26 Figures inside( ) indicates mass of the motor mount adapter plate. Motor Bracket 52 3.5 1 4-3.4 Thru 49 4-M3 Depth6 P.C.D.33 24 +.5 13.5 5h6 37 16 3. 42 Motor Bracket 1 (Mass:2) Motor Bracket 5 (Mass:32) 52 1.5 2 4-M4 Depth1.5 P.C.D.46 52 2 7 22 +.5 49 31 4-3.4 Thru 6C'bore.Depth4 (opposite side) 22 3 +.5 16 31 42 3.5 2.5 Motor Bracket 2 (Mass:12) Motor Bracket 6 (Mass:16) 52 6 3.5 2 5.5 3.4 12 3 12 52 2 5 22 +.5 49 23 4-3 Thru 5C'bore.Depth3 (opposite side) 2.5 1 +.5 P.C.D.16 3 16 2 23 3.5 Motor Bracket 3 (Mass:24) Motor Bracket 7 (Mass: ) 4.2 17 5.5 52 2 1.5 22 3 +.5 3 4-M3 Depth1.5 P.C.D.45 3 52 3.5 2 3 2. 3 3.5 1 +.5 For configurations 256 and 7the motor mount adapter plate is required to fit after motor is mounted. I-1
BG33 ROTRY Figures inside( Motor Bracket Motor Bracket 1 (Mass:66) 59 ) indicates mass of the motor mount adapter plate. 1 3 3 +.5 34 4-M4 Depth1 59 9 6h6 1 2H 4-M4 Depth 44.5 23 59 6 Motor Bracket 4 (Mass:212) 59 1 2 36 +.5 4-M3 Depth P.C.D.37 P.C.D. 4-M4 Depth1 2 2 6 Motor Bracket 2 (Mass:67) P.C.D.46 Motor Bracket 5 (Mass:125) 3.5 3 +.5 59 1 4-M3 Depth1 2 P.C.D.45 59 7 2 2 3.1 +.5 56.4 4-M4 Depth7 47.14 47.14 Motor Bracket 3 (Mass:133) 59 1 +.5 4-M4 Depth1 3 Motor Bracket B1 (Mass:111) 59 7 3 22 +.5 4-3.4 Thru 6C'bore.Depth3.5 (opposite side) 59 31 2 54 P.C.D.6 I-11 42 31 For configuration of B1, the motor mount adapter plate is required to fit after motor is mounted.
BG46 Figures inside( Motor Bracket ) indicates mass of the motor mount adapter plate. 51 5.5 12.5 1 3.5 -M4 Depth 5 6 P.C.D.6 46 +.5 32 63.5 h6 63 Motor Bracket 1 (Mass:13) Motor Bracket B 5.5 4-M5 Depth P.C.D.7 5.5 12.5 3 +.5 4-M4 Depth P.C.D.46 46 +.5 62 Motor Bracket 2 (Mass:16) Motor Bracket C 4-M3 Depth 4-M4 Depth 5.5 P.C.D.7 5.5 12.5 3 +.5 P.C.D.45 46 +.5 62 Motor Bracket 3 (Mass:44) Motor Bracket D 5.5 15 4-M5 Depth1 3.5 P.C.D. 5.5 12.5 4-M4 Depth 46 7 +.5 36 +.5 I-12
BG55 ROTRY Figures inside( Motor Bracket Motor Bracket 1 (Mass:329) ) indicates mass of the motor mount adapter plate. 94 12 3.5 7 +.5 59 4-M6 Depth12 94 22 12h6 17 P.C.D. +.5 4-M5 Depth1 74.5 63.5 32 99 69 9 Motor Bracket 5 (Mass:399) 94 12 3.5 +.5 6 P.C.D.7 4-M6 Depth12 P.C.D.1 Motor Bracket 2 (Mass:333) 94 12 3.5 7 +.5 4-M5 Depth12 P.C.D. Motor Bracket 6 (Mass:449) 94 12 4-M6 Depth12 7 6 +.5 7 I-13
BG33 Return Bracket R 16 34 4 14 59 9 27 6h6 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 H-7, page I-1. 3h 23 27 6.5 44 44.5 BG33 Return Pulley Unit tension plate mounting direction code 3 21 16 1 3 13 mounting direction code 117 21 72 24 6 mounting direction code 6 16 9 2 where tension plate is not allowed to be exposed 42 44.5 2 Td d Tension Td =1.9N d=1.1mm mounting direction code 9 cross section - 1.This drawing shows R for MSM1(Panasonic). 2.Installation position of Pulley Unit can be selected at 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-7, page I-1. 6.Inertia is added 2.221-6 kgm 2 to the value of Table I-9, page I-19. 7.part number format BG33 / Symbol of applicable motor bracket (see page I-4) Mounting direction code (refer to cross section -) Table I-4 Motor Bracket Configurations Motor Bracket pplicable Motors R MTSUSIT ELECTRIC INDUSTRIL MINS SERIES :~1W YSUKW ELECTRIC SIGM SERIES :~1W RB MITSUBISHI ELECTRIC HC-MF SERIES :~1W SNYO ELECTRIC P3 SERIES :~1W Please contact NB for return brackets for other stepper motors. I-14
BG46 Return Bracket R ROTRY 51 2 3 2 1 h6 h 1. can be used for both with cover and sensor. 2. Mass is reduced.3kg from the value of Table I-7, I-1. BG46 Return Pulley Unit Tension plate 4-M5 Depth1 Helical inserts 32 6 6 mounting direction 3 25 31 2 5.5 63 63.5 6 34 94 mounting direction 167 12 mounting direction 6 31 6 2 12 34 Td d Tension Where tension plate is not allowed to be exposed Td=2.9N d=1.6mm mounting direction 9 62 1 63.5 cross section - 1.This drawing shows R for MSM1(Panasonic). 2.Installation position of Pulley Unit can be selected at 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-7, page I-1. 6.Inertia is added 1.241-5 kgm 2 to the value of Table I-9, page I-19. 7.parts number format BG33 / Symbol of applicable motor bracket (see page 4) Mounting direction code (refer to cross section -) I-15 Table I-5 Motor Bracket Configurations Motor Bracket pplicable Motors R MTSUSIT ELECTRIC INDUSTRIL MINS SERIES : 2W YSUKW ELECTRIC SIGM SERIES : 2W RB MITSUBISHI ELECTRIC HC-MF SERIES : 2W SNYO ELECTRIC P3 SERIES : 2W RC ORIENTL MOTOR STEPPER MOTOR 6 SERIES Please contact NB for return brackets for other stepper motors.
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. Figure I-9 sensor specifications BG2,26 Photo Sensor Specification W 12 t t photo sensor sensor dog sensor mounting rail 15 5 ccessories photo-sensor(pm-l24, SUNX) connector for above sensor mounting rail(same length of guide rail) sensor dog(deflector) 3 pcs 3 pcs 1 pc 1 pc part number BG2B BG26B W 1 15 t 16 17 BG33,46,55 Photo Sensor Specification connector W photo sensor sensor dog 15 15.5 ccessories 15 sensor mounting rail photo-sensor(ee-sx674, OMRON) 3 pcs part number connector for above(ee-11, OMRON) 3 pcs BG33B sensor mounting rail(same length of guide rail) 1 pc BG33CD sensor dog(deflector) 2pcs.forBG 33D-1 1 pc BG46BCD BG55B BG2,26 Proximity Sensor Specification W proximity sensor sensor dog sensor mounting rail W 15 1 15 2 t.5 2. 4.5 S 6 5 13 ccessories proximity-sensor (PM-D3B1, YMTKE) connector for above(pm-d3b1f, YMTKE) sensor mounting rail(same length of guide rail) sensor dog(deflector) 2 pcs 1 pc 1 pc 1 pc part number BG2B BG26B W 15 15 S 1 11 I-16
LLOWBLE SPEED llowable 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-6 llowable Speed part number rail lengthmm 1 BG21 1 2 1 2 BG262 2 3 1 2 3 BG335 6 1 2 3 BG331 6 speedmm/sec 17 21 5 46 31 1,1 93 62 Figure I-1 Guide Rail Length and llowable Speed part number BG461 BG462 BG552 rail lengthmm 3 4 5 6 7 9 3 4 5 6 7 9 1, 1,1 1,2 1,3 speedmm/sec 7 6 3 1, 1,3 1, 7 1,12 91 7 63 53 ROTRY allowable speed mm/sec BG262 BG21 guide rail length mm I-17
MSS The mass of the BG type is listed in Table I-7 and slide block mass is listed in Table I-. Table I-7 Mass of BG type ctuator unit / kg part number without top-cover with top-cover rail length long block short block long block short block mm 1block 2block 1block 2block 1block 2block 1block 2block B C D B C D rail length mm BG2 BG26 BG33 BG46 BG55 Table I- Mass of Blocks without top-cover Mass stated "with top-cover" includes mass of auxiliary table. with top-cover unit / kg part number long block short block long block short block BG2.7.11 BG26.17.24 BG33.3.15.4.2 BG46.9.5 1.2.7 BG55 1.7 2.3 I-1
INERTI Inertia of the slide block and ball screw of BG type are shown in Table I-9. Table I-9 Inertia unit / kgm 2 without top-cover with top-cover part rail length long block short block long block short block rail length number mm-7 1block 2block 1block 2block 1block 2block 1block 2block mm B C D B C D 1 1.341-7 1.361-7 1.361-7 1.1-7 1 BG21 1 1.31-7 1.51-7 1.51-7 1.91-7 1 2 2.331-7 2.351-7 2.351-7 2.391-7 2 1 6.1-7 6.261-7 6.161-7 6.1-7 1 BG262 2 7.651-7 7.31-7 7.721-7 7.971-7 2 2 9.221-7 9.391-7 9.291-7 9.541-7 2 3 1.1-6 1.11-6 1.91-6 1.111-6 3 1 1.641-6 1.561-6 1.641-6 1.711-6 1.61-6 1.711-6 1 2 2.21-6 1.941-6 2.31-6 2.91-6 1.91-6 2.11-6 2 BG335 3 2.791-6 2.991-6 2.711-6 2.791-6 2.61-6 3.131-6 2.751-6 2.61-6 3 3.551-6 3.751-6 3.41-6 3.561-6 3.621-6 3.91-6 3.511-6 3.631-6 4.321-6 4.521-6 4.241-6 4.321-6 4.391-6 4.661-6 4.21-6 4.391-6 6 5.1-6 5.21-6 5.11-6 5.91-6 5.151-6 5.421-6 5.41-6 5.161-6 6 1 2.191-6 1.1-6 2.211-6 2.471-6 2.21-6 2.491-6 1 2 2.571-6 2.271-6 2.591-6 2.51-6 2.1-6 2.71-6 2 BG331 3 3.341-6 4.141-6 3.31-6 3.361-6 3.611-6 4.691-6 3.171-6 3.641-6 3 4.11-6 4.1-6 3.1-6 4.121-6 4.31-6 5.461-6 3.941-6 4.1-6 4.71-6 5.671-6 4.561-6 4.91-6 5.151-6 6.221-6 4.71-6 5.171-6 6 5.631-6 6.431-6 5.331-6 5.651-6 5.911-6 6.991-6 5.471-6 5.931-6 6 3 1.791-5 2.21-5 1.691-5 1.21-5 1.71-5 2.171-5 1.741-5 1.921-5 3 4 2.11-5 2.411-5 2.1-5 2.21-5 2.251-5 2.561-5 2.131-5 2.311-5 4 5 2.571-5 2.791-5 2.461-5 2.591-5 2.641-5 2.951-5 2.521-5 2.691-5 5 BG461 6 2.951-5 3.11-5 2.51-5 2.91-5 3.31-5 3.331-5 2.1-5 3.1-5 6 7 3.341-5 3.571-5 3.241-5 3.371-5 3.421-5 3.721-5 3.291-5 3.471-5 7 3.731-5 3.961-5 3.631-5 3.751-5 3.1-5 4.111-5 3.671-5 3.31-5 9 4.121-5 4.351-5 4.21-5 4.141-5 4.191-5 4.1-5 4.61-5 4.221-5 9 3 2.471-5 3.391-5 2.71-5 2.51-5 2.71-5 3.991-5 2.271-5 2.91-5 3 4 2.61-5 3.771-5 2.461-5 2.961-5 3.171-5 4.31-5 2.661-5 3.371-5 4 5 3.251-5 4.161-5 2.41-5 3.351-5 3.551-5 4.771-5 3.51-5 3.761-5 5 BG462 6 3.641-5 4.551-5 3.231-5 3.741-5 3.941-5 5.161-5 3.441-5 4.141-5 6 7 4.31-5 4.941-5 3.621-5 4.131-5 4.331-5 5.551-5 3.21-5 4.531-5 7 4.411-5 5.341-5 4.21-5 4.511-5 4.711-5 5.931-5 4.171-5 4.21-5 9 4.1-5 5.721-5 4.411-5 4.1-5 5.91-5 6.321-5 4.561-5 5.211-5 9 1.461-4 1.641-4 1.521-4 1.761-4 1, 1.591-4 1.761-4 1.651-4 1.1-4 1, BG552 1,1 1.711-4 1.1-4 1.771-4 2.1-4 1,1 1,2 1.31-4 2.1-4 1.91-4 2.121-4 1,2 1,3 1.951-4 2.131-4 2.11-4 2.251-4 1,3 I-19 ROTRY
To obtain the rated life of the BG type complete the following 2 equations and use the minimum value as your rated life. fc C fw P RTED LIFE Rated Life Equation for Guide Section LG= LG : rated life (km) fc : contact coefficient Fw : load coefficient C : basic dynamic load rating (N) P : working load (N) 3 Table I-1 Contact Coefficient (fc) number of blocks used on an axis 1 2 Table I-11 Load Coefficient (fw) operating condition vibration/shock speed none 15m/min or less contact coefficient (fc) 1..1 load coefficient (fw) 1. 1.5 Rated Life Equation for Ball Screw Section 1 Ca or Cb fw Pa La = 1 6 3 small big 6m/min or less 6m/min or more 1.5 2. 2. 3.5 La : rated life (rev) Ca or Cb: basic dynamic load rating (N) fw : load coefficient Pa : axis direction load (N) 1 Ca or Cb fw Pa La'= 3 La' : rated life (km) Ca or Cb: basic dynamic load rating (N) fw : load coefficient Pa : axis direction load (N) : ball screw lead (mm) RIGIDITY By utilizing four-point contact structure, the BG type provides extremely high rigidity. Figure I-11 shows deflection of each size of long block against radial load. Table I-12. shows the geometrical moment inertia of guide rails. Table I-12 Geometrical Moment Inertia of Guide Rails Figure I-11 Block Deflection against Radial Load part geometrical moment inertia ( mm 4 ) mass number IX(X xis) IY(Y xis) (kg/1mm) BG2 6. 1 3 6. 1 4.24 BG26 1.69 1 4 1.42 1 5.3 BG33 5.14 1 4 3.42 1 5.6 BG46 2.34 1 5 1.4 1 6 1.23 BG55 2.21 1 5 2.23 1 6 1.4 load (N) I-2
LUBRICTION ND OPERTING TEMPERTURE BG type contains a lithium-soap based grease. pply 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-12. Resin parts are assembled in BG type. The recommended ambient working temperature is or lower. pply 55 or lower for sensor option type. Figure I-12 Location of Grease Fitting single block grease fitting double block grease fitting Motor Bracket Side ROTRY PRECUTION FOR USE grease fitting 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 DISSSEMBLE. The accuracy of BG type is adjusted by the factory when it is assembled. llow 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-21
BG2,B -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 L 2 L 1 49 N1 26 6 P1 1.5 41.(Min).2 1 4.5 1 2 3 1 33 4-M3 Depth6 P.C.D.29 2 12.5 9.5 29 h6 P2 N2 39.6 23 17 +.5 4-M3 Depth4.5 4-M2 Depth4 5 2 29 1 (Depth.9) B section - 4.5 32.4 4 View B(motor bracket ) refer P for other motor bracket I-22
ROTRY 41.(Min) 2 2-M2Depth5(both sides).2 2 33 6.5 45 52 37 34 14 4-M4 Depth14 B 32 section - 4.5 17 3 View B(motor bracket ) refer P for other motor bracket L1 L2 1 157 2 27 3 257 I-23 -With Top-Cover- dimensions stroke limit N1 M1P1 N2 M2P2 BG2 BG2B 2 16 2 16 43 15 15 93 26 26 143 1 Stroke limit is traveling distance between both ends of the dampers.
BG26,B -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 L2 1 L1 52 N1 3.5 6 P1 11 1 1 61.(Min) 6 25.5 15 (Depth.9) 34 49.6 31 4-M3 Depth6 P.C.D.33 26 22 25 16 13.5 h6 37 +.5 4-M4 Depth7 4-M2 Depth4 3 44 B P2 4 6 N2 42 3. section - View B(motor bracket ) refer P9 for other motor bracket I-24
ROTRY 4-M4 Depth17 61.(Min) 2 2-M2Depth5(both sides) 3 44.5 6 12 55 B 62 47 43 17 section - 6 22 3 View B(motor bracket ) refer P9 for other motor bracket L1 L2 1 212 2 262 2 312 3 362 I-25 -With Top-Cover- dimensions stroke limit N1 M1P1 N2 M2P2 BG26 BG26B 35 1 35 1 73 2 2 123 61 2 2 45 45 173 111 3 3 3 3 223 161 Stroke limit is traveling distance between both ends of the dampers.
BG33,B -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 L2 6 77.2(Min) L1 77.2 74.4 P1 N1 9 34 59 9 1 4-M2 Depth5 53. 15 (Depth1) 4-M4 Depth P.C.D. 23 44.5 3 3 4-M5 Depth 3 B P2 6 N2 59 37.4 33 31.5 6 section - 4-M3 Depth P.C.D.37 View B(motor bracket ) refer P1 for other motor bracket I-26
77.2(Min) 4-M5 Depth15 74 54 77.2 74.4 4-M3 Depth6 (from reverse side) ROTRY 6 62 59 15 3 66 4 6 section - 31.5 46.5 View B(motor bracket ) refer P1 for other motor bracket L1 L2 1 217 2 267 3 367 467 567 6 667 I-27 -With Top-Cover- dimensions stroke limit N1 M1P1 N2 M2P2 BG33 BG33B 25 25 6 11 11 11 21 21 21 133 31 31 31 233 41 41 41 333 51 51 51 433 Stroke limit is traveling distance between both ends of the dampers.
BG33C,D -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 L2 6 51.9(Min) L1 51.9 49.1 P1 N1 9 34 59 9 1 3 2-M5 Depth 5 2.5 1 (Depth1) " " 4-M2 Depth5 2.5 4-M4 Depth P.C.D. 23 44.5 3 B P2 6 N2 59 37.4 33 31.5 6 section - 4-M3 Depth P.C.D.37 View B(motor bracket ) refer P1 for other motor bracket I-2
2-M5 Depth15 51.9(Min) 74 5 " 2.5 51.9 49.1 2.5 66 4-M2 Depth5 (from reverse side) ROTRY 6 62 59 4 15 6 section - 31.5 46.5 View B(motor bracket ) refer P1 for other motor bracket L1 L2 1 217 2 267 3 367 467 567 6 667 I-29 -With Top-Cover- dimensions stroke limit N1 M1P1 N2 M2P2 BG33C BG33D 25 25 5 34 11 11 135 4 21 21 235 14 31 31 335 24 41 41 435 34 51 51 535 44 Stroke limit is traveling distance between both ends of the dampers.
BG46,B -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 13 L1 9 19.2(Min) P1 15 1 19.2 16.6 L2 N1 51 5.5 12.5 3.5 5 54.4 -M4 Depth P.C.D.6 46 44.5 32 63.5 46 46 +.5 4-M6 Depth12 4-M2 Depth5 46 15 (Depth1) B P2 7.5 N2 6 11 section - View B(motor bracket ) refer P11 for other motor bracket I-3
-With Top-Cover- ROTRY 4-M6 Depth22 4-M5 Depth22 19.2(Min) 1 3 46 1 19.2 16.6 93 4-M3 Depth6 (from reverse side) 112 5 6 22 6 section - 11 44.5 66 View B(motor bracket ) refer P11 for other motor bracket L1 L2 3 43.5 4 53.5 5 63.5 6 73.5 7 3.5 93.5 9 13.5 I-31 dimensions stroke limit N1 M1P1 N2 M2P2 BG46 BG46B 21 31 29 1 31 41 39 2 41 51 9 3 7 51 2 61 9 61 71 69 71 1 79 6 1 91 9 7 Stroke limit is traveling distance between both ends of the dampers.
BG46C,D -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 13 L1 L2 9 73.2(Min) P1 15 1 73.2 7.6 N1 51 5.5 12.5 3.5 46 2-M6 Depth12 3.5 4-M2 Depth5 15 (Depth1) " " 44 5 54.4 -M4 Depth P.C.D.6 46 44.5 32 63.5 46 +.5 B P2 7.5 N2 6 11 section - View B(motor bracket ) refer P11 for other motor bracket I-32
-With Top-Cover- 2-M6 Depth22 73.2(Min) 1 " 43.5 73.2 7.6 " 3.5 93 4-M3 Depth6 (from reverse side) ROTRY 112 5 6 22 6 section - 11 44.5 66 View B(motor bracket ) refer P11 for other motor bracket L1 L2 3 43.5 4 53.5 5 63.5 6 73.5 7 3.5 93.5 9 13.5 I-33 dimensions stroke limit N1 M1P1 N2 M2P2 BG46C BG46D 21 31 245 172 31 41 345 272 41 51 445 372 7 51 2 61 545 472 61 71 645 572 71 1 745 672 1 91 45 772 Stroke limit is traveling distance between both ends of the dampers.
BG55,B -Without Top-Coverwww.bergab.ru Берг АБ bergab@ya.ru Тел. (495)-22-6-21, факс (495) 223-371 15 L1 9 123(Min) P1 16 123 121 L2 N1 59 94 22 4-M Depth15 4-M3 Depth6 2 (Depth1.5) 95 99 65 4-M5 Depth1 P.C.D.7 55 42 32 63.5 74.5 +.5 B P2 1 N2 1 13 section - View B(motor bracket ) refer P12 for other motor bracket I-34
-With Top-Cover- ROTRY 123(Min) 11 95 123 121 16 4-M Depth36 4-M3 Depth6 (from reverse side) 124 95 92 36 1 section - 13 42 77 View B(motor bracket ) refer P12 for other motor bracket L1 L2 19 1 119 11 129 12 139 13 149 I-35 dimensions stroke limit N1 M1P1 N2 M2P2 BG55 BG55B 61 42 34 711 15 934 11 71 52 65 134 911 1 1134 111 62 15 91 1234 1111 Stroke limit is traveling distance between both ends of the dampers.