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- Ball Reducer Line-up
- Standard Ball Reducer BR series
Standard Ball Reducer BR series
The standard Ball Reducer model.
Its reduction mechanism uses steel balls in the meshing section to achieve Zero-Backlash, high efficiency, and low noise.

Highlights
Supports a Wide Range of Designs
Features a wide variety of output and input shaft shapes to flexibly meet various design needs.
Zero-Backlash
Uses a steel ball in the deceleration mechanism instead of a gear. Eliminates backlash and enables prevision feeding and high-precision positioning through constant rolling contact via preload.
Compact & Simple
Has a reduction mechanism and input/output bearings built into its housing for compactness and ease of installation.
Maintenance-free
Its grease-filled reducer can be used without lubrication for its entire rated life. Also has no mounting position restrictions.
High Efficiency
Its transmission mechanism uses a large number of steel balls to achieve a high-efficiency drive. The rolling contact of the balls is similar to that of a ball screw, allowing extremely light operation and maximized capacity of any motor.
Ball Reducer (Input Shaft Type)
BR | 1 |
---|---|
50 | 2 |
S | 3 |
S | |
10 | 4 |
G | 5 |
1 | 6 |
A | 7 |
X | 8 |
1.Product Name | BR series |
---|---|
2.Frame number | 50, 65, 85, 100, 125, 160 |
3.Output shaft shape | S: Shaft output U: Flange output (KU for BR100 and 125 only) |
4.Reduction ratio | BR50: 10, 15, 18 BR65: 10, 15, 20 BR85: 10, 15, 20, 30 BR100: 10, 20, 30, 40 BR125: 10, 20, 30, 50 BR160: 10, 20, 30, 50 |
5.Rotational Direction | G: Rev. S: Fwd. *Rotational direction of the output shaft relative to the input shaft rotational direction |
6.Output shaft option code | No Code: No setting For Shaft Output (S): 1: Keyless, 2: Keyway+tip tap, 3: ”D”-cut, 4: ”D”-cut+tip tap For Flange Output (U): 5: Keyway+keyway tolerance P9, 6: Keyway+keyway tolerance Js9 |
7.Input shaft option code | No Code: No setting A: Keyless B: Keyway+tip tap C: ”D”-cut D: ”D”-cut+tip tap G: Short-length type for a coupling(A coupling sold separately) |
8.Other option code | No Code: No setting X: Drill-throu-hole housing |
Ball Reducer (Input Shaft Type)
BR | 1 |
---|---|
50 | 2 |
U | 3 |
H | |
10 | 4 |
G | 5 |
7 | 6 |
K | 7 |
2 | 8 |
5 | 9 |
E | 10 |
X | 11 |
1.Product Name | BR series |
---|---|
2.Frame number | 50, 65, 85, 100, 125, 160 |
3.Output shaft shape | S: Shaft output U: Flange output (KU for BR100 and 125 only) |
4.Reduction ratio | BR50: 10, 15, 18 BR65: 10, 15, 20 BR85: 10, 15, 20, 30 BR100: 10, 20, 30, 40 BR125: 10, 20, 30, 50 BR160: 10, 20, 30, 50 |
5.Rotational direction of output shaft | G: Rev. S: Fwd. *Rotational direction of the output shaft relative to the input shaft rotational direction |
6.Input bore size | Please refer to the hole input type dimensions. |
7.Input Fastening Method | K: Key holding T: Tap holding W: Key and tap holding |
8.Key Width Dimensions | Please refer to the key groove dimension table. |
9.Output shaft option code | No Code: No setting For Shaft Output Axis (S)… 1: Keyless, 2: Keyway+tip tap, 3: ”D”-cut, 4: ”D”-cut+tip tap For Flange Output (U)… 5: Keyway+keyway tolerance P9, 6: Keyway+keyway tolerance Js9 |
10.Input shaft option code | No Code: No setting E: Keyway+keyway tolerance Js9 |
11.Other option code | No Code: No setting X: Drill-throu-hole housing |
Specifications
Model |
---|
Reduction ratio |
Rotational Direction |
Allowable rated torque (N・m) |
Acceleration peak torque (N・m) |
Max. Instantaneous torque (N・m) |
Allowable average number of input revolutions (rpm) |
Max.Input rpm (rpm) | Moment of inertia at Input shaft (x10-4 kg・m2) |
At end of output shaft | At end of input shaft | Mass weight (kg) | Outline Drawing | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Allowable radial load (N) | Allowable thrust load (N) | Allowable radial load (N) | Allowable thrust load (N) | U type | S type | U type | S type |
BR50 |
---|
BR65 |
BR85 |
BR100 |
BR125 |
BR160 |
10 | Reverse | 3.9 | 9.8 | 19.6 | 2400 | 3000 | 0.021 | 29 | 79 | 49 | 29 | 0.36 | 0.4 | ||
15 | Forward | 3.9 | 9.8 | 19.6 | 0.018 | ||||||||||
18 | 3.9 | 9.8 | 19.6 | 0.017 | |||||||||||
10 | Reverse | 7.8 | 14.7 | 29.4 | 2400 | 3000 | 0.053 | 98 | 294 | 49 | 49 | 0.7 | 0.9 | ||
15 | 7.8 | 14.7 | 29.4 | 0.048 | |||||||||||
20 | 6.9 | 12.7 | 25.5 | 0.043 | |||||||||||
10 | Reverse | 19.6 | 37.3 | 73.5 | 2400 | 3000 | 0.19 | 294 | 588 | 108 | 74 | 1.45 | 1.8 | ||
15 | 17.7 | 33.3 | 65.7 | 0.16 | |||||||||||
20 | 15.7 | 29.4 | 58.8 | 0.15 | |||||||||||
30 | Forward | 14.7 | 27.5 | 54.9 | 0.14 | ||||||||||
10 | Reverse | 34.3 | 58.8 | 117.7 | 2300 | 3000 | 0.65 | 490 | 981 | 147 | 98 | 3.0 | 3.6 | ||
20 | 31.4 | 53 | 105.9 | 0.52 | |||||||||||
30 | 24.5 | 42.2 | 82.4 | 0.5 | |||||||||||
40 | 24.5 | 41.2 | 83.4 | 0.44 | |||||||||||
10 | Reverse | 68.6 | 117.7 | 235.4 | 2200 | 3000 | 1.81 | 785 | 1471 | 186 | 147 | 4.9 | 6.4 | ||
20 | 68.6 | 117.7 | 235.4 | 1.4 | |||||||||||
30 | 51 | 86.3 | 172.6 | 1.28 | |||||||||||
50 | 44.1 | 74.5 | 150 | 1.17 | |||||||||||
10 | Reverse | 98.1 | 176.5 | 353 | 2000 | 2500 | 5.2 | 981 | 1961 | 441 | 294 | 10.5 | 14.2 | ||
20 | 98.1 | 176.5 | 353 | 4.07 | |||||||||||
30 | 94.1 | 168.7 | 338.3 | 3.61 | |||||||||||
50 | 62.8 | 112.8 | 225.6 | 3.33 |