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Sumitomo Cyclo Drive 6000 Reducer
Our best-selling reducer with high strength and reliability, thanks to the unique Cyclo mechanism.
- With its long history and delivery record, it has become synonymous with the term speed reducer.
- Unique Cyclo mechanism results in high durability and extended operating life.
- Wide variety of products available that take advantage of this technology.
- Select the best product to meet your needs from a wide range of capacities and reduction ratios.
Break-Resistant Teeth
Unlike a regular involute tooth-gear, the “cycloidal disc,” which is the gear for the Cyclo Drive 6000 reducer, features a distinctively smooth curve.
A unique circular-arc tooth profile is also used for the internal gear. The smooth rolling contact that prevents tooth breakage results in a durable gearbox with a long service life. (Some low reduction ratio models use helical gears and planetary gears.)

| Output Shaft | Solid shaft |
| Output Shaft Direction(s) | Any Mounting Direction (horizontal, vertical downward, vertical upward) |
| Mounting Style | Foot Mount, Flange Mount, Case Mount |
| Frame Size | 34 single stage, 56 double stage sizes |
| Reduction Ratio | 3:1 – 7 569:1 |
| Rated Torque | 24 – 68 200 Nm |
80+
Years of history
Long life
Durable reducer with long product life
High reduction ratio
Reduction ratios up to 119:1 in single stage
Product Features
Break-Resistant “Teeth”
The “cycloidal disc” has a unique and smooth curve, which together with its smooth rolling contact, prevents tooth breakage, resulting in a durable product with a long product life.
Broad Variation
Choose the product that best fits your needs from a wide selection, including torque range up to 68 200Nm, reduction ratios of 3:1 – 7 569:1, as well as multiple options.
Service Factor Selection
Choose from any Service Factor. Reducer frame sizes can be increased independently, without increasing motor capacity.
Compact
We manufacture a wide range of reduction ratios in a single reduction, from 3:1 to 119:1. We can easily configure double and triple reduction types by simply layering the reducer mechanisms. Because of its flat Cyclo disc arrangement, it is very compact, even at high reduction rates.