Repairs and Service For

Adjusto-Spede Motor Repair Services in Michigan

A&C Electric provides Adjusto-Spede motor repair to companies in Michigan, Indiana and Ohio. We work with DSI Dynamatic, Eaton and Louis Allis drives, offering quick diagnostics and in-house service capabilities for every model. Contact us today for a quote on Adjusto-Spede motors across the Midwest.

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How Adjusto-Spede Drives Work

Adjusto-Spede Drives use an air-cooled, adjustable speed clutch paired with a NEMA B AC induction motor to deliver constant torque across a variable speed range. There’s no physical contact between input and output, which helps reduce wear and extend motor life.

Each drive includes:

TEFC construction and C-Face endbells
Internal tachometer generator for real-time feedback
DC excitation to the clutch coil via the controller

Speed is regulated by comparing the tachometer signal to a reference point within the controller. This feedback loop produces smooth response with reduced shock loading—ideal for high-inertia loads and precision industrial motor control.

Adjusto-Spede systems deliver a 34:1 speed range at 250% rated torque, making them ideal for high-load startups. Because Adjusto-Spede drives differ significantly from standard motor types, they require specialized knowledge and equipment. A&C Electric technicians have decades of experience repairing industrial electric motors and strive to save customers money by reducing lead time and spare motor costs.

Variable Speed Drive Models We Service

AS & FAS Drives: Smooth, Compact Speed Control
Dynamatic AS and FAS drives offer tight speed control with simple drop-in installation, especially in fractional horsepower ranges.
- Available in 1/4 to 1.5 HP units
- Compatible with single or three-phase power
- 34:1 speed range and 250% rated motor torque
- Built with permanently lubricated bearings and C-face mounts
- Matches overload requirements and existing wiring
- No special training or wiring changes required
AT Drives: Built for Stamping Presses
Originally engineered for press applications, AT drives provide rugged performance and consistent torque under changing loads.
- 1–200 HP capacity with tachometer feedback
- Speed control within 0.5% from no load to full load
- 250% rated torque for high-inertia startups
- Minimal harmonics with low-maintenance design
- Small controller footprint with PLC compatibility
- Used in presses, kilns, bitumen pumps and cold feed bins
DCD Drives: Low-Maintenance in Harsh Conditions
DCD drives combine durability with simplicity for demanding environments like mining and asphalt processing.
- Air-cooled, adjustable speed clutch with AC induction motor
- Self-cleaning rotor for dust and debris resistance
- 250% startup torque and consistent speed regulation
- TEFC design with no routine maintenance
- Drop-in NEMA and IEC motor frame compatibility
- Reliable performance in conveyor and aggregate systems
Our team repairs and refurbishes Adjusto-Spede industrial motors using precision tools, proper handling techniques and decades of hands-on experience. Each motor is returned quickly and at a significantly lower cost than replacement.