C-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 ROAR SRO -1

2 now offers a new standard in linear motion with OPA. he OPA slide bush is a high performance bushing with three times the load capacity, capable of providing up to 27 times normal travel life of a conventional slide bushing. OPA is available in a variety of configurations to fit various service conditions. 's self-aligning OPA can be designed into many different applications such as factory automated equipment, machine tools, industrial machines, electrical equipment, optical and measuring instruments. In the early stages of 's development of OPA, careful thought and consideration was given to such factors as quality, cost, performance and interchangeability. he results of these efforts are reflected in the OPA features. OPA AURS 1. Increased oad apacity: 's uniquely designed ground load plate provides circular arch contact to the ball element resulting in a greater dispersion of the load, enabling OPA to provide three times the load capacity of conventional slide bushings. 4. loating Integral iper Seal: 's unique floating design allows for selfalignment while maintaining equal and constant contact to the shaft. Seals do not add to the overall length of the bushing allowing for more compact designs. 2. onger ravel ife: Dispersed stress on the load plate provides OPA up to 27 times the travel life of conventional slide bushings. 3. Self Aligning apability: oad plates are thinner at the ends to provide a pivot point at the center of the plate. he center acts as a fulcrum to compensate for any slight misalignment between the shaft and the housing bore that might be caused by inaccurate machining, mounting errors or shaft deflection. igure -1 Illustrating circular arch design and ground surface raceway. learance Adjustable: OPA load plates are designed to "float" in the outer sleeve which allows for clearance between the ball elements and shaft to best suit application requirements.. ost ffectiveness: OPA's higher load capability and longer travel life enables the use of smaller components such as bushings, housings and shafts, reducing material cost and the overall cost of the system. onger travel life also extends replacement periods and reduce maintenance cost. igure -2 Illustrating floating and self-aligning feature ircular arch design floating round surface raceway 1 Self-aligning feature -2

3 PS ROAR SRO OPA closed type open type -OP A etric series A- P.- P.- -OP A Inch series A- P.- P.- closed type P.-12 P.-13 P.-1 - P.-19 OPA unit adjustable type open type - P.-2 P.-21 P.- P.-1 adjustable-open type D P.-1 D- P D P.- D- P.-23

4 RAD I he life of a slide bush can be easily calculated with the load rating of the bush, shaft hardness and applicable load. owever, in many cases, slide bushing failure may be caused by improper design of peripherals, including the shaft and housing, inappropriate mounting or improper operation. Serious consideration of these peripheral factors, in addition to load rating, are highly recoended when designing a slide bush application. asic Dynamic oad Rating and ife xpectancy: he basic dynamic load rating is the load which allows a rating life of km, without changing its magnitude and direction. he rating life can be obtained from the following equation. 3 = quation (1) P : travel life (km) : basic dynamic load rating () P : load () igure -3: Slide ush ife m,,, 2,,, 4, 3, 2, 1, 1, igure -3 shows the relationship between rating life () and load ratio(/p). In the practical use of a bushing, other factors that affect the life, such as shaft hardness and load condition should be considered. he equation for calculating bushing life considering these additional factors is: f fw P 3 = quation (2) rating life 2, 1, f : hardness coefficient (See igure -4) fw : load coefficient (See able -1) 4 ife time can be calculated by obtaining the travelling distance per unit of time as follows: 3 h= quation (3) 2s distance coefficient =P/ 2 h : life time (hr) s : stroke length (m) 1 : stroke frequency per min. (cpm) : travel life (km) -4

5 oad coefficient (fw): hen calculating the bush load, it is necessary to accurately obtain weight, inertial force based on speed, moment load and each transition as time passes. owever, it is difficult to calculate those values accurately because reciprocating motion involves the repetition of starts and stops as well as vibration and inpact. A more practical approach is to obtain the load coefficient by taking the actual operating conditions into account. able -1: oad oefficient OPRAI ODIIOS operation at low speed (1m/min. or less) without impulsive shock from outside operation at intermediate speed (m/min.or less) without impulsive shock operation at high speed (over m/min.) with impulsive shock ardness oefficient (f): he shaft must be hardened to over R when a slide bush is used. If not properly hardened, permissible load is lowered and the life of the bushing will be shortened. igure -4: ardness coefficient hardness coefficient (f) fw raceway hardeness R - xamples of alculations: (1) ife expectancy when 's OPA is used under the following conditions: oad per bush: Stroke length:.2m Rate of cycles/min: 3 Shaft hardness: R rom the basic dynamic load of is 37. hardness coefficient(f) is 1., and the operating speed can be calculated as.km/min. herefore, the load coefficient(fw) is considered as 1.. Using quation (1) (Page -4) 37 3 = =9,km Using quation (3) (Page -4) 9, 3 h = =,hours 2.23 (2) Selection of for the application xpected life: 1, hours umber of bushings in the carriage: 4 ross weight on the carriage: Stroke length:.9km raveling speed:.3km/min. Shaft hardness: -4R he life expected in traveling distance is: =1,.3 =27,km(2.7 4 ) rom quation (2) 3 27 fw = P=2, f ote that: f=1., fw=1., P=/4=17 As a result, the OPA that is able to handle this load is: 2. ROAR SRO

6 asic Static oad Rating: If a slide bush is loaded when it is in a stationary condition or working at a low speed, a permanent elastic deformation is formed on the rolling element. he deformation prevents smooth movement of the bushing. o eliminate this possibility, the basic static load rating must not be exceeded. Relation etween all ircuits and oad Rating: he load rating of a slide bush varies according to the loaded position on the circumference. he value in the dimensional table indicates the lowest load rating with the load placed on top of one ball circuit. If the slide bush is used with two ball circuits loaded uniformly, the value will be greater. able -2 shows the load ratio for the number of ball circuits in each case. learance and it: An appropriate clearance between the slide bush and shaft is required in OPA operation. Inadequate clearance may cause early failure and/or poor, rough movement. Proper clearance is determined by shaft diameter and housing bore. able -3 and -4 shows 's recoended tolerances of the shaft and housing bore in order to maintain the appropriate clearance. able -3: Recoended olerance for Shaft Dia. and ousing ore able -2: Optional oad Positions UR O ROS o (OAD RAI SPIID O A) omax (AXIU OAD RAI) OAD RAIO omax/o 4 o 1,4 1,43 1,2 Anti-orrosive ype: A special OPA is also available for corrosive applications. Specify with a suffix "-" for either bushing or slide unit requiring our anti-corrosive type OPA. he load plates are electroless nickel plated and use Stainless Steel ball elements. or "-" slide units, all hardware components are of anticorrosive properties. o o omax omax omax able -4: Recoended olerance for Shaft Dia. and ousing ore part number dr shaft dia. tol. (h) m /1 housing bore D tol. (7) m 21 / dr shaft dia. tol. (g) housing bore. D tol. (7)

7 Shaft and ousing: o optimize OPA performance, high precision shafts and housings are required. 1. Shaft: Dimensional tolerance, surface finish and hardness greatly affect the traveling performance of the OPA. he shaft must be manufactured to the following tolerances. A. A surface finish of.4ra or less.. ardness of R or more. ardness less than R decreases the life considerably and reduces the permissible load.. he correct tolerance of the shaft diameter is recoended on able -3 and -4 (Page -). igure - Use of holding plates igure - Adjustable type housing ROAR SRO he Slide Shaft is an ideal component manufactured to these specifications. or details, please refer to Page -2 to ousing: here are a wide range of designs and manufacturing techniques for mounted housings. pre-engineered slide units are also available. or proper fit refer to able -3 and -4 (Page -). ounting: OPA is designed to be press fitted into the housing bore. hen inserting bushing, however, don't apply excess force nor shock load which may cause permanent damage. xamples of ounting igures - to - illustrate mounting methods as s. -7 igure -7 Use of external retaining rings igure - Open type housing

8 P OPA etric ype type 2 UU OP blank closed OP open blank without UU s on both sides D D1 dr 1 Self-aligning 1 in all directions closed type no.of ball circuits part number mass g OP 1-OP 2-OP -OP -OP -OP open type no.of ball circuits 4 4 mass g dr tolerance* m /2 D tolerance.2 * ased on nominal housing bore -

9 ROAR SRO 12-OP h -OP 7 1-OP, 2-OP h -OP, -OP tolerance.2.3 h major dimensions D1 h open type 11 3 h : Pin hole basic load rating dynamic static o nominal shaft diameter kgf -9

10 P OPA Inch ype type 2 UU OP blank closed OP open blank without UU s on both sides D D1 dr 1 Self-aligning 1 in all directions closed type no.of ball circuits part number mass lbs OP -OP 12-OP 1-OP 2-OP 24-OP 32-OP open type no.of ball circuits 3 4 mass lbs major dimensions dr D tolerance*.. /. * ased on nominal housing bore tolerance..1.2 /. /. /. -

11 ROAR SRO h.1 tolerance.1.2 /. /. /. -OP D h 72 h OP open type through through h basic load rating dynamic static o lbs ,2 1,4 2,4 12-OP thru 32-OP lbs , 1, 1, 3, nominal shaft diameter 3/1 1/4 3/ 1/2 / 3/ /4 1-1/ =.4 1lbs.44 kg 1lbs4.44

12 A P lock ype (etric Series) A type A UU blank without UU s on both sides X.1 1. (oil hole).1 4- S mark self-aligning 1 in all directions part number AUU A12UU A1UU A2UU AUU AUU AUU shaft dia. major dimensions mounting dimensions load rating X recomended shaft tolerance is h S dynamic static o mass g 1.2kgf -12

13 A- P Double-ide lock ype (etric Series) ROAR SRO A type double-wide type A UU 4- blank without UU s on both sides (oil hole) part number AUU A12UU A1UU A2UU AUU AUU AUU shaft dia S major dimensions mounting dimensions load rating mark S dynamic static o mass g kgf -13

14 P Open lock ype (etric Series) type UU blank without UU s on both sides X.1 1. (oil hole).1 4- S 4- P R mark self-aligning 1 in all directions part number 12UU 1UU 2UU UU UU UU shaft dia major dimensions mounting dimensions load rating R X (1) or anti-corrosion the load plates are electroless nickel plated with Stainless Stell ball elements S P dynamic static o mass g kgf -

15 - P Double-ide Open lock ype (etric Series) ROAR SRO type double-wide type UU 4- blank without UU s on both sides (oil hole) part number 12UU 1UU 2UU UU UU UU shaft dia S 4- P R R mark major dimensions mounting dimensions load rating S P dynamic static o mass g kgf -1

16 D P learance Adjustable Open lock ype (etric Series) D type D 2 UU blank without UU s on both sides X.1 1. (oil hole).1 4- S 4- P R Z mark self-aligning 1 in all directions part number D12UU D1UU D2UU DUU DUU DUU shaft dia major dimensions mounting dimensions load rating Z R X S P dynamic static o mass g kgf -1

17 D- P learance Adjustable Double-ide Open lock ype (etric Series) ROAR SRO D type double-wide type D UU 4- blank without UU s on both sides (oil hole) part number D12UU D1UU D2UU DUU DUU DUU shaft dia S 4- P Z R A mark major dimensions mounting dimensions load rating Z 12 1 A R S P dynamic static o mass g kgf -17

18 A P lock ype (Inch Series) A type A 2 UU blank without UU s on both sides 4-S h.12 self-aligning 1 in all directions oil hole* part number A 4UU A UU A UU A UU A 12UU A 1UU A 2UU A 24UU A 32UU shaft dia. 1/4 3/ 1/2 / 3/ /4 1-1/2 2 h major dimensions * Provided with push-in oil fitting for 1/4" to 1/2" s. Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs4.44-1

19 A- P Double-ide lock ype (Inch Series) ROAR SRO A type double-wide type A 2 UU 4-S blank without UU s on both sides.12.1 h.12.1 part number A 4UU A UU A UU A UU A 12UU A 1UU A 2UU A 24UU shaft dia. 1/4 3/ 1/2 / 3/ /4 1-1/2 h major dimensions oil hole* * Provided with push-in oil fitting for 1/4" to 1/2" s. Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs

20 P learance Adjustable lock ype (Inch Series) type 2 UU blank without UU s on both sides.12 4-S.1.1 h.12 self-aligning 1 in all directions oil hole* part number 4UU UU UU UU 12UU 1UU 2UU 24UU 32UU shaft dia. 1/4 3/ 1/2 / 3/ /4 1-1/2 2 h major dimensions * Provided with push-in oil fitting for 1/4" to 1/2". Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs4.44-2

21 - P learance Adjustable Double-ide lock ype (Inch Series) ROAR SRO type double-wide type 2 UU.12 4-S.1.1 blank without UU s on both sides h.12 part number 4UU UU UU UU 12UU 1UU 2UU 24UU shaft dia. 1/4 3/ 1/2 / 3/ /4 1-1/2 h major dimensions oil hole* * Provided with push-in oil fitting for 1/4" to 1/2". Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs

22 D P Open lock ype (Inch Series) D type D 2 UU blank without UU s on both sides 4-S h self-aligning 1 in all directions h1 oil hole* part number D UU D UU D 12UU D 1UU D 2UU D 24UU D 32UU shaft dia. 1/2 / 3/ /4 1-1/2 2 h major dimensions * Provided with push-in oil fitting for 1/4" to 1/2" only. Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass h1 S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs4.44 -

23 D- P Double-ide Open lock ype (Inch Series) ROAR SRO D type double-wide type D 2 UU 4-S.1 h.12 blank without UU s on both sides.12.1 part number D UU D UU D 12UU D 1UU D 2UU D 24UU shaft dia. 1/2 / 3/ /4 1-1/2 h h1 major dimensions oil hole* * Provided with push-in oil fitting for 1/4" to 1/2". Sizes from /" to 2" offer a 1/4-2 tapped hole with a plug for adding a fitting if desired. basic load rating mounting dimensions dynamic static mass h1 S o lbs. lbs. lbs =.4 1lbs.44kg 1lbs