M-150 Electric Driveheads

We provide a complete line of electric driveheads for all your production needs.


Our M-150 electric drivehead is part of the M-Series of direct drives, which employs the efficient hydronamic braking system. The dual motor system design is used in medium- to high-horsepower applications in conjunction with our high-volume/high-lift progressive cavity (PC) pumps. As part of our commitment to safety, all our direct drives have a fully enclosed and hinged belt guard. Each drive is tested and inspected to meet our quality requirements.


  • Robust frame
  • Bearing box designed with a three-bearing system
  • Large brake reservoir for heat dissipation
  • Repeatable and reliable brake curve
  • Induction-hardened seal surfaces eliminate shaft grooving and increase seal life
  • Operator-friendly guards and motor adjustments
  • Easy-to-adjust hinged door for simple belt tightening
  • Easy-to-adjust motor height
  • Accessible fill/drain spouts for easy oil changes
  • Minimal maintenance
  • Service and technical support


  • Hydraulic motor
  • Rope-style stuffing box


  • Polished rod guard
  • Booth guard
  • Support arms
  • Shipping/support stands

M-150 Electric Drivehead Specifications

Drive type


Shaft type


Drive style

Bearing box

Input style


Drive ratio


Backspin control


M-150 Electric Drivehead Ratings

Max. output torque

2,500 ft-lb (3390 Nm)

Thrust bearing

227,000 ISO lbf

Thrust bearing*

59,500 Ca90 lbf

Maximum speed

600 RPM

Horsepower rating***

80–150 hp

Frame type

Dual motor

Compatible frame size NEMA

324T, 326T, 364T, 365T, 404T, 405T, 444T

Compatible frame size IEC

200M, 200L, 225S, 225M, 250S, 250M, 280S

Polish rod size

½ in. (38 mm)

Max. operating temperature

212 °F (100 °C)

M-150 Electric Drivehead Dimensions (Excluding Motor)

Height with retro stuffing box

55 in. (1397 mm)

Height with integral stuffing box

40½ in. (1029 mm)


41 in. (1041 mm)

Input shaft size

3¼ in. (83 mm)

Weight (no stuffing box)

1,700 lb (771 kg)

*Ca90 load rating is for 90 million revolutions. Reducing load by one-half increases life 10 times. Reducing RPM by one-half doubles hours of life.

***Maximum horsepower rating based on frame size only. Care must be taken in selecting motor and sheave combinations to ensure input rod torque is not exceeded.

  • M-150 Electric Drivehead Data Sheet