M-300 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

Our M-300 electric drivehead employs the highly efficient and extremely safe hydrodynamic braking system. Our dual motor system design is used in 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
  • Detachable leak-free stuffing box
  • 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


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


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

M-300 Electric Driveheads Specifications

Drive type


Shaft type


Drive style

Bearing box

Input style


Drive ratio


Backspin control


M-300 Electric Drivehead Ratings


Max. output torque

3,500 ft-lbs (4745 Nm)

Thrust bearing

350,700 ISO lbf

Thrust bearing*

90,9200 Ca90 lbf

Thrust bearing**

48,130 750 million cycles lbf

Maximum speed

600 RPM

Horsepower rating***     

120–300 hp

Frame type

Dual motor

Compatible frame size NEMA

364T, 365T, 404T, 405T, 444T, 445T

Compatible frame size IEC

225S, 225M, 250S, 250M, 280S, 280M

Polish rod size

1½ or 2 in. (38 or 51 mm)

Max. operating temperature

284 °F (140 °C)

M-300 Electric Drivehead Dimensions (Excluding Motor)

Height with retro stuffing box

74¾ in. (1900 mm)

Height with integral stuffing box

58⅜ in. (1483 mm)


42 in. (1067 mm)

Input shaft size

4¼ in. (108 mm)

Weight (no stuffing box)

2,100 lb (953 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-300 Electric Drivehead Data Sheet