Frequently Asked Questions

The Taper-Grip^® bushing is integral to the Cyclo^® HBB and provides for easy mounting and removal to and from the shaft of the driven machine.  Because it requires no keyway, the shaft isn't weakened and maximum torque is transmitted.  With the added strength of steel, the Taper-Grip® bushing can be used in reversing and/or high start-up applications.  The steel Taper-Grip® bushing can be used on all 
Taper-Grip® products.

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 limitations due to heat.

In general terms, the speeds are 1750 and 1165 RPM.  The selection tables in our catalog are based on 1750 RPM.  When other input speeds are used, the horsepower and torque ratings will vary.

Cyclo^® HBB speed reducers provide 300% momentary intermittent shock loads capacity. For applications with shock loads greater than 300%, consult an SMA Application Engineer.

The standard ratings for Cyclo® HBB 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 severe operating conditions.

To select the proper reducer for your application, you will need to know:Application: type of driven machine
Hours of operation per day
Motor horsepower (HP) and speed (RPM)
Loading Conditions
Mounting Position 
Ambient environment (altitude, dusty, chemical, explosive, water) 
Ambient temperature and humidity 
You must also note any special environment factors or operation requirements.  This information will be important in determining the your application's service factor. 

Selection is based on the actual horsepower and/or torque requirements at the output shaft.  The Cyclo^® HBB speed reducer has particularly high efficiencies over a wide range of reduction ratios, which frequently permits the use of reduced input power requirements (smaller HP motor) without sacrificing output shaft torque.  The selection procedures in our catalog will guide you in choosing the most efficient reducer for your application.

The first oil change should be carried out preferably after 100 hours and not more than 800 hours of operation.  The removed oil may be used again after filtering.  Filter the oil volume at least 10 times using a 10mm filter or smaller.  Subsequently the oil should be renewed after 4000 to 8000 hours or maximum of 18 months of operation depending on working conditions.  Please refer to service manual for detailed oil change instructions.

Mineral oils containing EP additives, which increase oil film load capacity should be used.  Refer to the P4 service manual for recommended oil types. 

Cyclo^® BBB5 Speed Reducers provide 300% momentary intermittent shock load capacity. For applications with shock loads greater than 300%, consult a Sumitomo Application Engineer.