Cyclo® 6000 Speed Reducer
Our best-selling reducer with high strength and reliability, thanks to the unique Cyclo® mechanism.
- With a long history of quality and reliability, the Cyclo® 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.
|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||56 sizes (output stages)|
|Reduction Ratio||2.5:1 - 658503:1|
|Rated Torque||Up to 603,620 lb-in (68200 N⋅m)|
Unlike a regular involute tooth-gear, the "cycloidal disc," which is the gear for the Cyclo® 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.)
Products for Various Applications
A variety of products are offered to suit any application.
You can choose the product that best meets your specific application needs.
CAD / Configure
Select your level of product detail:
Learn more about our CONFIGURATOR TOOL:
Do you have questions about the Cyclo Drive? Below are some of our most commonly asked questions or you can view our Support area under Knowledge for more frequently asked questions and answers.
I don’t like the turnbuckle torque arms and sometimes have reversing applications they don’t work well for, do you have another option?
Yes, we have 6 different torque arm options to make your installation easy.
What if I need to change the backstop rotation?
No problem, your Sumitomo rep can assist with that, we can instruct you how, or you can send it to us to do.
Can I adjust the speed with a direct drive like I can with a belt drive?
Not by changing a sheave size since that component is eliminated, but there are things to consider…
- How often are you really changing the speed?
- The flexibility of changing a sheave size also puts your system at risk. Are you overspeeding beyond the reducer's capabilities? Are you slowing down too much and causing the backstop spragues to drag and wear?
If you are utilizing a VFD, that can control your speed.
- If you find out you truly need to change your speed, our BBB is the only direct drive on the market that has a Cyclo cartridge that could be changed to change your overall speed eliminating the need for a whole new reducer. Work with your Sumitomo rep to consider this.
I don’t have a very long shaft, can I still replace a belt drive with a direct drive?
Yes, if our standard Taper Grip Bushing requires more shaft than you have, we have a new Taper Grip Bushing option that needs an average of ½ the shaft length. When we size up the reducer you need, we can tell you how much shaft length you need for both options.
What should be some features or upgrades I should consider for the Aggregate, Sand and Cement industries?
Taconite Seals, Severe Duty or Desiccant Breather
What thermal capacity limitations does the Cyclo® have?
The Cyclo speed reducer, by virtue of its smooth, almost frictionless operation (unlike traditional helical gears), has a thermal rating that far exceeds its mechanical capacity, and all but eliminates the conventional limitions due to heat.
Can my Cyclo® handle severe operating conditions?
The standard ratings for Cyclo are based on 10-hour daily service under conditions of uniform loads (equivalent to AGMA service factor 1.0). By following the product selection process outlined in our catalog, you will determine and apply the Service Factors to compensate for the severe operating conditions.
What information do I need to select a Cyclo® speed reducer or gearmotor?
To select the proper reducer for your application, you need to know: Application: type of driven machine
Hours of operation per day
Motor horsepower (HP) and speed (RPM)
Ambient environment (altitude, dusty, chemical, explosive, water)
Ambient temperature and humidity
You must also note any special environment factors or operational requirements. This information will be important in determining your application's service factor.
What are the standard Cyclo® input speeds?
In general terms, the speeds are 1750 and 1165 RPM. The selection tables in our catalog are based on 1750, 1165, 870, 580, and 50 RPM. When non-standard input speeds are used, the kilowatt (or horsepower) and torque ratings also vary.
The service factor of the Cyclo® reducer is generally higher than the traditional gearmotor. Why?
This is because Cyclo has a high teeth engagement rate. Since the Cyclo gearing has two-thirds of its reduction components in contact at all time, it can withstand higher shock loads and is more stable than traditional involute gearing.