Sterling Electric, Inc.

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Your source for quality motors and reducers since 1927


Mechanical VSDs



Speed-Trol® Mechanical Variable Speed Drives

HP:
.5 - 50
SPEED VARIATION:
Up to 10:1
POWER SUPPLY:
3 Phase, 60 Hz, standard 230/460 or 575 VAC.
Wide variety of special voltages and frequencies available.
ENCLOSURES:
ODP, TEFC, Explosion Proof and Sterli-Seal® (Washdown Duty).
NEMA DESIGNS:
B, C, D and special designs for specific applications.
STANDARD VARIATIONS:
- Available with T or U-frame motors.
- Variety of assembly positions.
- With or without reducers (helical and right angle).
- Can be supplied with modular, C-face input and output to accept any type of motor or reducer.
OUTSTANDING FEATURES:
- Lube-Free® (no grease) design of pulleys and shafts.
- Positive speed control over stepless range.
- Heavy duty belt with large thermal capacity to ensure long, cool-running operation.
- Full length cover plates on both sides of transmission provide easy access to internal parts.
- Various means available for changing speed (manual, electric or pneumatic).
- Tachometer speed read-out.
- Modular design provides the ultimate in flexibility and ease of service.
- Automatic belt tensioning ensures the smooth transmission of power and prevents excess belt wear.
- Can provide extra high starting torque.
REFERENCE:
Catalog 705