Product Info Reducers
Reducers are mechanical device that outputs power obtained from the output shaft of a power source such as a motor by reducing the rotational speed using gears.
The ratio of the number of gear teeth on the input and output sides is the reduction ratio, and the torque at the output shaft is inversely proportional to the reduction ratio.
Our line-up includes three gear types - helical gears, hypoid gears and worm gears - which can be selected according to the motor specification, shaft arrangement (parallel or right-angle shaft) and output shaft shape (solid or hollow) to suit the purpose.
Reducers Related information
Types and features of gears
The following five kinds of gears are used in our reducer. The features of each gear are shown in the table below.
| Hypoid gear | Cylindrical Worm | Troidal Worm | Bevel gears | Helical Gear | |
|---|---|---|---|---|---|
| Gears |  |
 |
 |
 |
 |
| Axis Position | Right angle shafts | Parallel shafts | |||
| Skew | Cross | ||||
| Efficiency | 80% | 40～70% | 40～80% | 90% | 90% |
| Noise | Good | Excellent | Excellent | Fair | Fair |
| Gear engagement | Both sliding and rolling | Sliding | Sliding | Rolling | Rolling |
| Self-Locking ※ | None | Provided (Reduction ratio 1/60) |
Provided (Reduction ratio 1/60) |
None | None |
※Self-Locking: This is a function of the worm gear that the input shaft side cannnot be turned from the output shaft side.
Generally, reduction ratio is 1/60 as a single-step reduction.
Reducers Product list
- DCBL Hypoid Motor
- Worm Gear Reducers
- Small-Size Gear Motor
- Gear Reducer for Servo Motors
- Miter and Bevel Gear Boxes
Worm Reducer (Worm Power Drive / Troi Drive)
Worm reducer is geared reducer (gearboxes) using worm gears. Unlike other types of gear transmissions, it make sliding contact, resulting in extremely low vibration and noise, and a large reduction ratio (generally 1/10 to 1/60) can be achieved with a pair of worm gears.
In addition, it is a gear that can be expected to have a reverse rotation prevention (Self-Locking) effect.
Click here for the basics of worm reducer
Tsubaki's worm reducers use two types of worm gears: a drum-shaped type and a cylindrical type.
The drum-shaped type (toroidal worm) offers high transmission capacity and compact equipment, while the cylindrical type (cylindrical worm) optimizes capacity, efficiency, and cost.
A wide range of variants are available for a variety of applications.
Troi Drive TD Series
Model No. TD～
High performance worms using a drum-shaped troidal worm provides high transfer capacity and high efficiency.
- ・The drum-shaped Troidal worm gear transmits power across its entire surface, giving this drive high transmission capacity and functionality. This high-performance worm gear reducer is ideal for designing compact equipment.
- ・The gear teeth mesh in a very unique way to achieve virtually no rotation variation.
- ・Available in eight frame sizes: 125 to 315, and reduction ratios from 1/10 to 1/60, and 1/100 to 1/3600.
- ・Available in a foot-mounted housing with a solid output shaft, or a flange-mounted housing with a hollow output shaft.
- ・Ensures ultimate compactness and weight saving for all layouts.
Size
Inter-shaft distance
125～315mm
Reduction ratio
1/10～1/3600
Torque
2700～47000N･m
Worm Power Drives EW・EWM(R)・EWJ・EWJM(R) Series
Model No. EW(J)･EW(J)M(R)～
High precision and compact The optimized design featuring basic foot mounting achieves a balance between cost and maintainability, and a range of variations allow equipment to be more compact.
- ・Achieves increased capacity, efficiency, and cost effectiveness without compromising accuracy and small footprint.
- ・Foot mounting style is standard. Both solid and hollow output shaft types are available.
- ・Selection ranging from small size to medium size (center distance: 25mm-200mm)
- ・MR series is compatible with High Efficiency motors. (IE3 Class : Premium Efficiency )
Size
Inter-shaft distance
25～200mm
Reduction ratio
1/10～1/3600
Torque
12～5300N･m
Worm Power Drives SW・SWM(R)・SWJ・SWJM(R) Series
Model No. SW(J)･SW(J)M(R)～
Uses a dedicated case for on-shaft and flange mounting, contributing to equipment simplification.
- ・Achieves increased capacity, efficiency, and cost effectiveness without compromising accuracy and small footprint.
- ・Both solid and hollow types of output shafts are available.
- ・Power-Lock and taper bush shafts are available, saving you manpower and time for assembly.
- ・Selection ranging from small size to medium size (center distance: 25mm-200mm)
- ・MR series is compatible with High Efficiency motors. (IE3 Class : Premium Efficiency )
Size
Inter-shaft distance
25～200mm
Reduction ratio
1/10～1/3600
Torque
12～5300N･m
TERUS
Model No. EWGM・SWGM・TDGM～
TERUS series combines worm reducers and helical gear motors.
- ・Excellent worm characteristics ：Can be configured to conform to many applications and goals, such as those that require high strength, quietness, and self-locking properties.
- ・Smaller equipment footprint ：Reduces equipment footprint and costs through a reduction in the number of components used.
- ・Wide variety of options ：Supports a wide variety of motor and brake options, including variable frequency motors and manual quick-release brakes.
- ※This is a made-to-order product. Please contact us when considering.
Motor Capacity
3 Phase 0.1～2.2kW
Reduction ratio
1/100～1/3600
Torque
39～11143N･m
Coverage by Series
Size
| 25 | 35 | 42 | 50 | 63 | 70 | 80 | 100 | 125 | 150 | 175 | 200 | 225 | 250 | 280 | 315 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EW(J)・SW(J) | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| TD | ● | ● | ● | ● | ● | ● | ● | ● |
Reduction ratio
| 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | |
|---|---|---|---|---|---|---|---|---|
| EW(J)・SW(J) | ● | ● | ● | ● | ● | ● | ● | ● |
| TD | ● | ● | ● | ● | ● | ● |
| 100 | 150 | 200 | 250 | 300 | 400 | 450 | 500 | 600 | 750 | 800 | 900 | 1000 | 1200 | 1500 | 1800 | 2400 | 3000 | 3600 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EW(J)・SW(J) | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||
| TD | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
Output torque
Please refer to the major specifications for the accurate output torque and transmission capacity table for each product.
Basic Knowledge of Worm Reducer
The worm reducers rotate by engaging a worm connected to the input shaft and a worm wheel connected to the output shaft.
If the worm has one worm thread, the worm wheel advances one tooth for each worm revolution. If the worm has 1 thread and the worm wheel has 100 teeth, the reduction ratio is 1/100.
Internal Structure of Worm Reducer
The features of the worm reducer are as follows.
- - Double reduction ratio
A large reduction ratio (generally 1/10 to 1/60) can be obtained with a pair of worm gears. - - Low Noise
Unlike other gear transmission methods, the sliding contact reduces vibration and noise to an extremely low level. - - Self-locking with no rotation from output shaft side to input shaft side
Generally, a self-locking effect can be expected at a reduction ratio of 1/50 to 1/60.- ※Tsubaki Worm Reducers are limited to 1/60 because of the emphasis on efficiency.
- ※Self-locking effect may be reduced by shock or vibration.
Since self-locking cannot be guaranteed, be sure to install a separate holding device when a secure stop or retention is required.
- - Stable rotation speed
Generally, it has less rotation variation than other reduction mechanisms, making it suitable for semiconductor manufacturing and other situations where rotation variation may affect product quality.
