M-100 Electric Driveheads

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

Image of an Electric Driveheads Oil Frame in a field

Designed for medium- to high-horsepower applications, our M-100 electric drivehead employs the highly efficient and extremely safe hydrodynamic backspin braking system. As part of our commitment to safety, all our direct drives have a fully enclosed and hinged belt guard. Each drivehead is tested and inspected to meet our quality requirements.


  • Robust frame
  • Bearing box is designed with a three-bearing system
  • Detachable environmental stuffing box
  • Large brake reservoir for head 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
  • Over 1,500 proven M-100 drives in operation worldwide
  • Service and technical support


  • Hydraulic motor
  • Rope-style stuffing box
  • JamPak stuffing box
  • Leak-free integral stuffing box
  • Retrofit stuffing box


  • Anti-ejection clamp
  • Lock-out device
  • Polished rod guard
  • Booth guard
  • Support arms
  • Shipping/support stands
  • Jackshaft
  • Tachometer

M-100 Electric Drivehead Specifications

Drive type Direct
Shaft type Hollow
Drive style Bearing box
Input style Vertical
Drive ratio 1:1
Backspin control Hydrodynamic

M-100 Electric Drivehead Ratings

Max. output torque 2,000 ft-lb (2712 Nm)
Thrust bearing 220,310 ISO lbf
Thrust bearing* 57,120 Ca90 lbf
Thrust bearing** 30,240 750 million cycles lbf
Maximum speed 600 RPM
Horsepower rating*** 20–100 hp
Frame type Single motor
Compatible frame size NEMA 256T, 284T, 286T, 324T, 326T, 364T, 365T, 404T, 405T, 444T
Compatible frame size IEC 160L, 180M, 180L, 200M, 200L, 225S, 225M, 250S, 250M, 280S
Polish rod size 1¼ or 1½ in. (32 or 38 mm)
Max. operating temperature 285 °F (140 °C)

M-100 Electric Drivehead Dimensions (Excluding Motor)

Height with retro stuffing box 50 in. (1270 mm)
Height with integral stuffing box 35½ in. (902 mm)
Width 35 in. (889 mm)
Input shaft size 3¼ in. (83 mm)
Weight (no stuffing box) 1,215 lb (552 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.

**Approximately 3 years at 500 RPM

***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-100 Electric Drivehead Data Sheet