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1 BR SERIES In-Line Zero-Backlash Speed Reducers Patented Drive Mechanism Genuine zero backlash; Ideal for Positioning Applications High Zero-Maintenance Reduction Ratio s between :1 and 100:1 Output Torque between 9Nm and 1Nm LOW COST Precision Motion (CoFil) Ltd. PO Box Preston PR 9AD UK Tel : + (0)1 9 Fax : + (0)1 info@precisionmotion.co.uk Website :

2 FEATURES OF BALL REDUCERS A ball is an ultimate power transmission element. Structure of Ball Type Speed Reducer All-ball contact at all time due to preset pressure and rolling torque transmission enables users to have non-backlash transmission. Features of Ball Reducers Input shaft Preloading nut Output shaft Oldham disc Non-backlash Many steel balls are employed to reduction portion instead of toothed wheels. Rolling contact due to preset pressure enables users to minimize amount of backlash. No Slippage Generation Ball type speed reducer uses no frictional transmission of steel balls, and like the case of toothed wheels, no slippage occurs to insure precise speed reduction ratio. Eccentric disc Balls Output disc Compact & Simple By integrating a reducer mechanism and an input /output part into the housing the unit is assembled to be compact size, and the reducer with the concentricity of the input/output has materialized no dead space installation. Low Level Noise There is only rolling ball noise due to the rolling contact of steel balls at all rotating members. There is no meshing or flexing gear noise at all. Therefore, The ball reducer is used for medical equipment, which requires quiet. Contents Easy to Use The ball reducers will contribute to eliminate the troublesome design of the housing and reduce the cost since many models are available for easy use. Maintenance-free Filling grease makes it possible to be free of maintenance procedures. The ball type speed reducer does not restrict mounting posture, and insures extensive freedom of designs. Features Introduction of Types Basic Specification Table BR Dimensional Drawings for BR type BBR Dimensional Drawings for BBR Typehigh reduction ratio BRA Dimensional Drawings for BRA Type Input and Output Option, Others Performance and Features Flow Chart for Type Selection 1 9 Mounted to any motors With simple flange arranged, it is possible to cope with any types of electric motors. We have instrument capable to instantly attach commercial stepping motor. Nimble Action and High Like the case of ball type screw, rolling contact of balls enables users to extremely smooth actuation. Ball type speed reducer enables users to utilize any types of electric motors to the upmost capability. Aftercare We can swiftly cope with research and checkup which customers ask for. We have enough inventories for component parts so that customers can use our products for an extended period of time. Wide Range of Speed Reduction Ratio & Torque 1 00 The ball reducer provides the speed range from low speed to high speed1/ ~1/100 in standard unitsand the torque range from low torque to high torque1 ~ 98 N-m. 1

3 PRODUCT LINEUP PRODUCT LINEUP Ball Reducer Product Lineup KAMO ball reducer is a unique product and easy to use. They are offered in many series to meet a wide variety of design needs such as reduction ratio, size, installation position, and shaft configuration. On the strength of ball type speed reducer, it is possible to select speed reduction ratio by every 1 decrements designated within standardized ratio. Select the most appropriate unit according to your design need. We can cope with specially designed ball type speed reducer, such as for example, hollow shaft type, compact type, thickness-reduced type, high-torque type, angular type, anti-dripping type, oil-resistant type and mass-produce type speed reducer. Contact us without reservation although it will take enough delivery time and meeting with customers. BBR-S Series High reduction ratiostandard models Two-stage ball type speed reducer with high ratio reduced by more than 1/0. First and second stages are compactly interconnected to make it more mountable. Output shaft and mount surface has the same structure as standard typebr- Shas. Combination of speed reducers enables users to several thousandths as speed reduction ratio. Four types represented by BBR8, 0, and10. P. P.1 BR-S Series Standard models BBR-U Series High reduction ratiocompact models The BR-S series of ball reducers is the basic types using ball reduction with a rigid output shaft. As mounting screw holes are provided on both the input and output end of the unit so as to install in the limited space for various machines, customers can determine the favorable installation method from the wide range of flexible configuration of installation. The series are available with two different types of input configurations. One is a bore input type into which the motor shaft is insertedh type. The other is a standard shaft for a coupling or a pulley inputs type. This series is available in six output torque sizes. 810 With output axis shaped from shaft type to flange type and output shaft support bearings mounted in one place to produce thickness-reduced main body, load weight is attached by means of screw at flange surface. Four types represented by BBR8, 0, and 10. P.1 P. P. P.8 BR-U Series Compact models BBRF-S Series Flange mountedhigh reduction ratiostandard models The BR-U series of ball reducer is the one which output shaft is a flange incorporating one bearing to allow the unit a compact profile. The units are available in the same input configurations as the BR-S. This series is available in six output torque sizes Output shaft and mounting surface are the same configuration as flange-mounting typebrfhas. Four types represented by BBRF8, 0, and 10. P. P. P.9 P. BRF Series Flange mountstandard models BRA Series Square models You can select from six ball type speed reducers with angular flange integrally mounted on output side of the standard type. This series is available in six output torque sizes. P. P. 8 Ball type speed reducer has main body of angular configuration. -phase and -phase stepping motorsoriental, Sanyo or Others can be connected with no special attachment needed. It is possible to attach to other servomotor. Four types including 8mm-angular typeminimized type. P.1 P.

4 BR SERIES SPECIFICATIONS BR SERIES INSTALLATION POINTINNER STRUCTURE Rotational Direction of Output Shaft BR BR series Rotational direction of output shaft is decided against input shaft side as shown in the right drawing. Rotational DirectionRotational Direction of Output Shaft Against Input Shaft Specifications Reduction Ratio At low speed output shaft side Max.Input RPM Moment of inertia at Input shaft Allowable Rated torque Peak Torque at Acceleration Max.Instantaneous Torque At end of output shaft Allowable Allowable Radial Load Thrust Load At end of input shaft Allowable Radial Load Allowable Thrust Load Weight Reduction Ratio 0 Reverse Output shaft Forward SSSH USUH 09 SSSH 000 USUH Reduction Ratio Input Shaft Consider load factor when select a model Ctd. refer P. tabel. The allowable peak torque applied to the output shaft at normal stop and start. Note: Care should be taken that the peak torque at acceleration not be exceeded during normal operation. The max. instantaneous torque is max. allowable torque applied to the output shaft when the load is emergency-stopped or subject to an external impact. NoteThis torque is not maximum torque under normal operating condition. Ball type speed reducer has no self-locking function. When unbalanced load is applied to input shaft even with power source OFF, be careful of shaft accidentally set in motion P Reduction ratios are prepared by every 1 decrement designated within above tablediscretely ordered Load torque Max. starting torque SSSH 0 1 USUH SSSH 01 USUH SSSH 09 9 USUH 1 SSSH 0 USUH Constant operation torque Max. stopping torque Instantaneous max. Torque Points of Installation BR-S Series Installation Point 8 Either of the two faces can be attached as illustrated below. Design the bracket or case as rigid as possible to retain the reducer, and absorb the vibration and noise from the reducer. Care should be taken when installing the series BR, BR and BR8 as the case of the units is aluminum-made and overtightening mounting screws can cause damage to the case. Load Base Bracket 8 It forms easily mountable configuration and no special care is needed. Firmly fix to base of high rigidity. BRF,, 8 types are of aluminum flange. Load BR-U Series Installation Point 000 The BR-U series is designed for a compact installation profile, and as such, the output flange is supported by one bearing. Without additional support on the output flange, the deflection will be present in the amount of mm. Additional support of the output flange should be provided when parallel rotational accuracy is concern, if heavy axial loading or heavy loading is to be encountered. Loads of this type can be expected from use of a pulley or gear. Load shaft Supports at least one 0. UH or US type reducer head Long bolt Additional support 0 The main body of ball reducer is fixed by either an additional flange mounting shown inbor tightening long bolt shown inaby boring through holes on the main body. Please advise us if through hole mounting is to be used as the through hole may affect interfere the inner parts in some models. As the output shaft at the end of flange may vary max. 0.mm toward axial direction by reduction ratio or preload pressure as shown inc. Therefore, the load shaft should have the structure that enables travel toward axial direction.

5 BR SEREIESBR-S MODELS BR SERIESBR-S MODELS BRS BR-S s SS TypeShaft InShaft Out Standard Series Ball Reducer holes equally spaced Width P9 for modelbr only Width P9 P. IndicationWhen ordering, please specify the model as shown below Refer to P. with the coupling. SH TypeBore InShaft Out Shaft Type In put Bore Type In put Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys. Reduction Ratio:, and etc. 810 Ball reducer :,,8,0,,10 Examples BRinput shaft typereduction ratio 01 BR0bore input typereduction ratio 1mm input boremm keyway width Key Type Holding Set Screw Type Holding 8 BR8bore input typereduction ration 8mm input boreset screw holding type Table of BR-S Series Dimensions Code Deep 0 Deep Deep Deep Deep 0 Deep 0 Deep 1 Deep Round W Type Refer to P. Refer to P

6 BR SERIESBR-U MODELS BR SERIESBR-U MODELS BRU BR-U s USKUSTypeShaft InShaft Out Compact Series Ball Reducer holes equally spaced for all models, but holes for BR10 P. IndicationWhen ordering, please specify the model as shown below Shaft Type Input Examples 0 BR0, BR only BRinput shaft typereduction ratio Refer to P. with the coupling. Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type 01 BR0bore input typereduction ratio 1mm input boremm keyway width 8 BR8bore input typereduction ration mm input boreset screw holding type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys. Reduction Ratio:, and etc. 810 Ball reducer :,,8,0,,10 UHKUHTypeBore InShaft Out Key Type Holding Set Screw Type Holding Code Table of BR-U Series Dimensions Deep 0 Deep 0 Deep 1 Deep Deep 0 Deep 0 Deep 1 Deep Deep 0 0 Deep 0 Deep 1 Deep 1 1 Deep 1 Round W Type Refer to P. Refer to P

7 BR SERIESBRF MODELS BR SERIESBRF MODELS BRF BR-F s SS TypeShaft InShaft Out Standard Series Ball Reducer With Mounting Flange holes drilled through Keyway KY1 P9 Keyway KY P9 P. IndicationWhen ordering, please specify the model as shown below Refer to P. with the coupling. Shaft Type Input SH TypeBore InShaft Out Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys. Reduction Ratio:, and etc. 810 Ball reducer :,,8,0,, Examples BRFinput shaft typereduction ratio 01 BRF0bore input typereduction ratio 1mm input borekey holding mm keyway width Key Type Holding Set Screw Type Holding 8 BRF10bore input typereduction ratio mm input boreset screw holding type Table of BR-S Series Dimensions Code Deep Round W Type Refer to P. Refer to P. 1 8

8 BBR SERIES SPECIFICATIONS BBR SERIES INSTALLATION POINTINNER STRUCTURE Rotational Direction of Output Shaft BBR BBR Series BBRS BBRU BBRFS Specifications Red. Ratio Allowable Rated Torque High Reduction Ratio Ball Reducer Peak Torque at Acceleration Max. Instantaneous Torque Max. Input RPM 00 Weight SS type SS type 8 SS type 1 SS type BBR-S BBR-U Installation Key Point P. Please use the front end as the mounting end. Installation procedures for BBR-S can be installed directly or onto the bracket prepared by customer. BBR-UFlange output typeare to be followed as described on P. for the standard ration BR-U series products. Additional support Red. Ratio Rotational Direction Points of Installation Special Products Red. Ratio Rotational Direction Rotational DirectionRotational Direction of Output Shaft Against Input Shaft 1000 A reduction ratio up to 00:1 is available for the BBR10. The specification is subject to change according to the reduction ratio. Please ask us if the special reduction ratio is required. Motor selection for BBR type should be determined carefully as BBR type has the features of non-backlash and high resolution if the motor is selected from the allowable torque of the output shaft as the motor capacity becomes small and the efficiency extremely lowers. The allowable load at the output shaft end should be referred to the corresponding model number of BR series in the specification list of P.. P. Flange Output Type Shaft Output Type 1 1

9 BBR SEREISBBR-S MODELS BBR SEREISBBR-S MODELS BBRS BBR-S s SS TypeShaft InShaft Out High Reduction Standard Ball Reducers N-O P.C.D. J KY G P-Q t W KY1 P.C.D. M A1 I h D h d h K h A R S T E C B1 B F L P. IndicationWhen ordering, please specify the model as shown below Refer to P. with the coupling. SH TypeBore InShaft Out Shaft Type Input Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys Reduction Ratio: 0, 00, 0 and etc. 10 Ball reducer : 8, 0,, 10 Examples 00 BBR0input shaft typereduction ratio 0 0 BBRbore input typereduction ratio 0mm input borekey holding typemm keyway width Key Type Holding Set Screw Type Holding 100 BBR10bore input typereduction ratio 0mm input boreset screw holding type Table of BBR-S Series Dimensions Code Deep Deep Deep 0 0 Deep Refer to P Deep 0 Deep

10 BBR SeriesBBR-U s BBR SeriesBBR-U s BBRU BBR-U s US TypeShaft InShaft Out High Reduction Compact Ball Reducers N-O P.C.D. J P.C.D. H A1 I h D hrotating ShaftDh G H P-Q t W KY d h K h A P.C.D. M a-b R C E B1 B L S T F P. IndicationWhen ordering, please specify the model as shown below Refer to P. with the coupling. UH TypeBore InShaft Out Shaft Type Input Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys Reduction Ratio: 0, 00, 0 and etc. 10 Ball reducer : 8, 0,, 10 Examples 00 BBR0input shaft typereduction ratio 0 0 BBRbore input typereduction ratio 0mm input borekey holding typemm keyway width Key Type Holding Set Screw Type Holding 100 BBR10bore input typereduction ratio 0mm input boreset screw holding type Table of BBR-U Series Dimensions Code Deep Deep Deep 0 Deep 0 0 Deep Deep Deep Refer to P Deep 1 0 Deep 1 Deep

11 BBR SeriesBBRF-S s BBR SeriesBBRF-S s BBRFS BBRF-S s SS TypeShaft InShaft Out High Reduction Standard Ball Reducers with Mounting Flange N-O P.C.D. J KY G A1 P-Q t W KY1 P.C.D. M I h D h d h K h A A E H R S T L C B1 B F1 L1 P. IndicationWhen ordering, please specify the model as shown below Refer to P. with the coupling. SH TypeBore InShaft Out Shaft Type Input Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding Type P. Refer to P. for dimensions Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys Reduction Ratio: 0, 00, 0 and etc. 810 Ball reducer : 8, 0,, 10 Examples 00 BBRF 0input shaft typereduction ratio 0 0 BBRF bore input insertion typereduction ratio 0mm input borekey holding typemm keyway width Key Type Holding Set Screw Type Holding 100 BBRF 10bore input typereduction ratio 0mm input boreset screw holding type Table of BBRF-S Series Dimensions Code Deep Refer to P Deep

12 BRA Series Specifications BRA s BRA BRA Series Square Type Ball Reducers BRA 88 Allowable thrust load Allowable radial load phases phases 0 0kgf kgf Square Housing & Mounting Surface Ball Reducers key width P9 deep BRA BRA s -M deep M deep 8 Specifications Reduction Ratio Allowable Rated Torque Repeatabilityarc'sec Lost Motionarc'sec Allowable Radial Load 0 0 Allowable Thrust Load 0 00 Imput Shaft Torque 8 9 Weight 0 0 BRA phases phases Allowable thrust load kgf Allowable radial load kgf BRA Allowable thrust load kgf Allowable radial load kgf -M 8deep through holes key width P9.deep key width P9 1.8 deep -M deep 0 -M 8 deep 8 Performance Characteristics BRA Torque Characteristics 1 Shown is the maximum output torque of the ball reducers mounted to a stepping motor.motor output torque x efficiency ratio. The output pulses of the ball reducers do not exactly follow those of the motor. This is due to the natural inertia of the internal ball reducer members. The graph shows the characteristic of the BRAB-1 reduction ratio. According to the graph, the ball reducer steps-out of phase at the pulse of k.p.p.s or over. This is observed on all models, suggesting that load operation at kpps or higher is not recommended. Ball reducer output torque at output shaft Calculated output shaft torque is determined by the motor torque x efficiency ration. However, the torque is limited by the torque value given in the specification table. Therefore, it is not advised that a larger motor than needed be installed. Example The output shaft torque of Ball reducer BRA8-motor model No.9 is calculated as follows.0 x efficiency8% 1 / = 9 9. kgfcm Torque Motor torque Motor torque Output torque fs max. fs starting frequency # Motor Pulse ratekpps Torque of the output shaft of the reducer Dimensions in parenthesis [ ] are for the phase stepping motor.care should be taken as the shaft sizes are different in UMD and PH. After the motor is attached and the motor shaft should be tightened by the set screws firmly. Locktite applied to the setscrews will prevent loosening. For applications requiring a reduction higher than the listed ratios, consult the section on the BR Series of ball reducers through through 8 1

13 Option Option H-type input shaft optionbore input type Option of Input and Output Shaft BR-H typebore input typeand optional designations are newly added. Optional Representation Input Shaft Type Bore Input Type BRF series are available only for SSSH types. Option Keyway widthkey-holding type only KKey Holding Type TSet Screw Holding TypeNew model, Standardized WSet Screw & Key Holding TypeNew model, Standardized Input Bore Size Rotatinal Direction of output shaft: When it has the same rotatinal direction of input shaft, it is denoted bys. Reduction Ratio:, and etc. 80 Ball reducer,, 8, 0,, 10BBR 8, 0,, 10 Input Shaft Bore Size Z Set Screw Holding Type NoteTap sizes are specified in the table below according to bore sizes. Tap Size TT 0 10 NoteSet Screw Holding type is not available in BR10. Set ScrewKey Holding Type NoteTap sizes are specified in the table below according key width. Key Width X Tap Size TW 0 0 Code Standard Optional Items Other Option Code Input Shaft Option Code Output Shaft Option Code Code No code Output Shaft Option Code Content No Option Setting Keyless Keyway, Tapped End D-cut D-cut, Tapped end Keyway, Keyway tolerance P9 Keyway, Keyway tolerance Js9 Application SA U Table for Bore Input Type Dimensions 10 Max Z is available in K type & T type only, BR & 10 has K type only. Code Example S Type Output Shaft Keyless H type Input Shaft with Bore 8Keyless width Tolerance of Input Shaft Keyway WidthJs9 Drill-through-hole housing New Option Code No code Code No code Input Shaft Option Code Content No Option Setting Keyless Keyway, Tapped End D-cut D-cut, Tapped end Short-length Type for a couplinga coupling sold separately Keyway, Keyway tolerance Js9 Other Option Code Content No Option Setting Drill-throu-hole Housing Application Shaft Input Type Bore Input type Application SU Table of Keyway Dimensions Reference Dim. of X Key Holding Type Keyway Width ToleranceP Keyway Width Option ToleranceJs K eyway DepthYDimensionBore SizeZt Reference Dim. of t Tolerance Unitmm Note Corresponding Shaft Size NoteThe corresponding shaft sizes are subject to the corresponding torque to the strength of the keys. 00 If input shaft diameter is, tolerance of input bore size is H

14 Option Option S-type input shaft optionshaft input type Option of Output Shaft Option Code BTapped End type Option Code DDCutTapped End type Option Code Tapped End Type Option Code DcutTapped End Type Keyless in BR Option Code CDCut type M Depth M Depth 8 M Depth 8 M Depth M Depth M Depth M Depth M Depth 8 M Depth 8 M Depth 0 M Depth 0 M Depth M Depth 8 0 M Depth 0 M Depth M Depth 8 Option Code G Short Type for Couplings Option Code DCut type M Depth 8 M Depth M Depth M Depth 1 M8 Depth 1 1 M8 Depth 1 M Depth M Depth 1 M8 Depth 1 1 M8 Depth 1 0 M Depth M Depth M Depth M Depth 8 M Depth M Depth 0 M Depth M Depth M Depth Option Code KeywayKeyway Tolerance P9Js only in BR10 & BBR10 1 Other Options Depth R Option Code XDrill-Throu-Hole Housing S U No tap at this side

15 Oldham Coupling Input Oldham Coupling Input Oldham Coupling Oldham Coupling Method Connecting Ball Reducer to Motor Oldham CouplingFigure. 1 Oldham Coupling Dimension List of Each Input Methodmachined or specified by customer.).. 1 It may seem easy to mount the motor to the ball reducer, but you must heed to errors which can adversely affect on the performance. Especially in the type in which the motor shaft is directly inserted to the ball reducer, an axial misalignment, a key and keyhole accuracy affect not only on the ball reducer but also on the motor itself. This reflects on a poor maintenance when re-assembling the motor to the ball reducer after disassembled them. Bosses and spacers are interchangeable in the bore size to any models. Setscrew Setscrew Clamp bolt -M Set Screw. M Crank Bolt Oldham Coupling As an instrument to overcome above drawbacks, added is Oldham's couplingfig. 1to standard product. Coupling stands as standard accessoryrefer to underside frame. Since motor is left to users' option and there are a wide variety motors, machining inner diameter of coupling and mounting flangea long flange connecting motor to speed reducerare arranged at users' side. If customers wish to have arranged at our side, contact us so that we will machine and mount them at customers' expense. If machined and mounted at users' side, determine dimensional sizes with reference to drawingfig.. Set screw type boss Spacer Shape and Dimensions of Flange Figure. Collet type boss Notice in machining the bore of the Oldham Coupling. Insert a plate into the slit and tighten the plate by the collet of the lathe. Avoid the deflection and check no deflection by a dial gauge. Upon customer's request we can provide the finished coupling at cost. Motor. M Crank Bolt 8. M Crank Bolt Indication When ordering the ball reducer with a Oldham coupling, please specify CL and the bore size following the reduction ratio. In case of no bore size indication, the unit will be supplied at the minimum bore size. Example BRFlange type Output ShaftShaft Type Coupling Input Bore8 finish 8 BR8Flange type Output ShaftShaft Type Coupling Input Bore finish Diameter-H Coupling O.D.+A Mounting Bolt Throu-Holes to Reducer Tapped Holes mounting to Motor Motor Pilot Diameter-H The table of Oldham Coupling Standard s BR-S BR-U BRF BBR-S BBR-U BBRF-S Longer than F L Dimension F is specified in the diagram of the next page 10 Dimension Amin M Crank Bolt M8 Crank Bolt 8

16 Direct Mount to Motor Performance Direct Mount to Motor The motor can be directly connected to the ball reducer as shown in the graphs. An adapter flange shown at drawing will be needed in the case of the direct input method with a key type or a tapered bushing type. The adapter flange can be customer-supplied, or supplied by us. Please provide all motor data for dimensional accuracy. The ball reducer assembled with the adapter flange will be delivered to customer when we provide the adapter flange. The adapter should be made of SC or aluminum. Customer-supplied flange adapter should be finished to H on the ball reducer side of the flange and to E on the motor side of the flange. The tightening bolts should be tightened equally in considering motor shaft deflection. Keyway Type Adapter flange Round Shaft Type DorACut Type Clamp Type Set Screw Access Hole for wrench Applying grease Acut Dcut Fitting Key 0 NoteThis is for 0w or smaller motor only. Keyway Type Input The tolerance of the key width on the input shaft of the ball reducer is P9 unless otherwise specified. Check for proper fit between key and keyway in inserting the motor shaft. Excessive insertion of the motor shaft may result in damaging the ball reducer and the motor. Coat the shaft with grease before inserting the shaft into the bore input, which is preventing the shaft from being stuck in the bore fretted by frictional erosion. Round Shaft Type The output shaft of the smaller sizes of the stepping motors should have anacut or Dcut as shown in the left diagram.and the set screws are tightened in place. Locktite can be applied to the threads to prevent the screws from loosing. Clamp type is also usable as shown in the left-down diagram. RigiditySpring Constant 0 With fixing the input shaft and applying torque to the output shaft, the output shaft generates distortion being proportional to the generated torque, which draws the hysteresis curve. To express this distortion in fixed quantity, the polygonal lines connecting the points of the % and 0% of the rated torque is considered. The following matters are defined: Spring Constant = b/a Hysteresis Loss : Angle of torsion at zero torque Lost Motion : Angular of torsion at the middle band point of the curve at % of rated torque. Hysteresis Loss Lost Motion Rated torque Performance Tortional angular Torque of rated torque Rated torque Hysteresis loss and under Standard Reduction Ratio 0 Spring Constant NoteSpring constant value is indicated by the average value of the product samples. Lost Motion and under Angular Transmitting Accuracy Angular transmitting accuracy is the difference between the theoretical angle of rotationand the actual angle of rotation'of the output shaftfor lower speedwhen the input shaftfor higher speedis rotated to provide one revolution of the output shaft. This maximum difference of one rotation of the output shaft is defined as the angular transmitting accuracyer. Tapered Shaft Type Tapered Shaft Type Inputavailable only for UH models The tapered shaft type input is not applicable for small size. The prior information of the motor specifications enable us to design and make the ball reducer for the tapered shaft type input Note that this coupling is designed so that the tightening nut must be accessed through the output shaft side of the ball reducer as shown in the diagram. Angular velocity per minute Angular Transmitting Accuracy 9 and under Absolute Angular Error measurement example Normal Revolution and under Reversal Revolution BR-S, BR-U, BRF, BRA s. and under and under and under and under and under Angular Transmitting Accuracy 1.8 Maximum Angular Error at Normal Revolution.00 Maximum Angular Error at Reversal Revolution 9.8 Lost Motion difference between normal and reversal revolution BBR-S, BBR-U Series and under R: Reduction Ratio and under and under 9

17 No Load Input Running Torque No Load Input Running Torque No load input running torque means the required torque of input shaft at no load rotation. Torque No load input running torque Torque 1: only for BR 00 No load input running torque under,000rpm Each no-load input running torquet1at 0, 00, 00 rpm is calculated from the reading of no-load input running torquet0by multiplying the conversion constant K. Noise The following graphs show the input rotation of each model and the noise level for each reduction ratio. Input Speed Measurement ConditionThe noises are measured by a noise meter located 1meter away from the ball reducer under ambient temperature and no load operation.,000,000 1,000 Input RPM,000,000 1,000 Input RPM 8,000,000 1,000 Input RPM 0 0 1: 1: NoisedB 1: 1: 1: NoisedB 1: 0 NoisedB 1: 1: 1:,000,000 1,000 Input RPM Measuring Conditions SampleBR-S s Temperature of the main body: 00 Input Rotation Speed:,000 rpm Applied grease Super Lube No. Yuken Kogyo Co., Ltd. K values,000, Audibility Calibration Indicator Dynamic Characteristics 1:0 1: 1: 1: NoisedB 1: 1: 1: 1: Noise Level 0 0 A Characteristics,000 1,000 0 NoisedB Input RPM,000 1,000 Input RPM NoisedB 1: 1: 1: The graphs show the ball reducer efficiency at each load factorthe ratio of the rated torque to the loadper the each rotation of the input shaft for each model.measurement conditionthe ambient temperature Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor 1

18 Selection Flow Chart Selection Flow Chart Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor Load Factor From pages of catalogue, select needed type number upon ordering our products. The model is selected from the operation condition None None Decision of reduction ratioused RPM Max. input rpm Peak torque at start and stop Presence of external thrust load Presence of external radial load Decision Torque at shock External thrust load External radial load Average radial load Tm Table Average input rpm Table 1 Max. Input RPM Allowable Rated Torque Peak Torque at Acceleration Use a greater model or reduce load Instantaneous Max. Torque Allowable Thrust Load Allowable Radial Load Table 1 Basic Average Input RPM Table Load Factor Reference Formula Speed Pattern Load Pattern Average Load Torque Average Input Rotational Frequency Item Load Torque Rotation Speed Operation Condition No Shock & Smooth Operation Ordinary Operation Operation with shock and vibration Input Rotational Frequency Load Torque Table Operation Conditions Starting time Constant time Stopping time 0 Time 1 NoteIf Ball Reducer is used under high frequency of positioning, choose fd=.0.0. Time Time