GPM Hydraulic Gear Pumps
GPM Bearing Gear Pump Range
Bearing Gear Pump Range
Series 120     Series 125
Series 130     Series 131
Series 150     Series 151
Series 175     Series 176
  • Pumps
  • Motors
  • Flow Dividers
  • Add-a-Pumps
  • Spare Parts

Speeds up to: 2400 RPM
Pressure up to 205 BAR
Displacements between 16cc/rev to 200 cc/rev

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Motor Specifications

GPM Bearing Pump & Motor Specfications

Major Features, Interchangeability and PL Factor


Fluid Power for Mobile Equipment

GPM hydraulic pumps and motors are particularly well suited to mobile equipment applications; they are designed for extreme duty cycles, and continuous heavy duty operation. Whilst the equipment is of a simple yet rugged design, it is manufactured to extremely precise tolerances.

Pumps are available in capacities ranging from 11 cc/rev to 200 cc/rev for each gear section. Several sections can be combined into one assembly. A wide selection of SAE and ANSI mounting flanges and drive shafts are available for all drive units. Pipe thread, 0-ring seal, and split flange ports are available in both metric and SAE standards.

GPM pumps are manufactured under statistical analysis process control which is monitored by the South African Bureau of Standards to an ISO 9001-2008 quality management system.

Major Features

Sectional Construction: Standard parts, cast from high strength grey iron, can be assembled in a wide variety of configurations to suit almost any application.

Multiple pump units: Several pump sections can be combined in a single drive to eliminate multiple drive P.T.O units.

Precision matched gears: All gears are manufactured from high alloy forged bars, surfaces are precision finished and each gear pair is matched for maximum efficiency. The deep 1 0-tooth pattern gives maximum output per revolution whilst ensuring low pulsation frequency.

Bearings: Heavy duty roller bearings are utilized on all gear journals to reduce wear caused by contamination.

Motors: are available with capacities ranging from 0. 75kW to 75kW. Basically similar in design to pumps, they are engineered for extreme heavy duty applications, with high efficiency characterists. Motor speed is in direct proportion to the volume of oil delivered to the inlet port and output torque is in proportion to the pressure supplied to the motor. All other equipment required to match our pumps and motors is readily available.


GPM hydraulic equipment is direcUy interchangeable with the other internationally recognized SAE pumps and motors.

GPM equipment is sold in component form but units can be assembled and tested to meet your particular requirements.

PL Factor

Each section of a pump or motor should be regarded as a single unit with corresponding power input requirements. The entire input horsepower is fed through the drive shaft, the power delivered to or from the unit is limited by the strength of the shaft. The limit is defined as the “PL” factor, the “P” being the operating pressure in PSI and the “L” the sum of the gear widths In Inches.

In multiple units the “PL” must be calculated for each connecting shaft and must include the sum of the gear widths driven by it. (Each shaft has a unique “PL” factor as can be seen in the table below)

Pressure (PSI) x Total Gear Width (Inches) = PL Factor

GPM Bearing Pump & Motor Shaft Types

Quick Reference Exploded View

GPM Bearing Pumps Exploded View

Quick Reference Parts List (A to J)

GPM Bearing Pumps Quick Reference A-J

Quick Reference (A) - Solid Shaft Gear Set

GPM Bearing Pumps Quick Reference A

Quick Reference (B) - Loose Gear Sets

GPM Bearing Pumps Quick Reference B

Quick Reference (C) - Gear Housings

GPM Bearing Pumps Quick Reference C

Quick Reference (D1) - Shaft End Covers - Series 120, 125

GPM Bearing Pumps Quick Reference D1

Quick Reference (D2) - Shaft End Covers - Series 131, 151

GPM Bearing Pumps Quick Reference D2

Quick Reference (D3) - Series 176

GPM Bearing Pumps Quick Reference D3

Quick Reference (E) - Port End Covers

GPM Bearing Pumps Quick Reference E

Quick Reference (F) - Bearing Carriers

GPM Bearing Pumps Quick Reference F

Quick Reference (G to I) - O Bronze Pressure Ring, Connecting Shafts

GPM Bearing Pumps Quick Reference G-I

Quick Reference Parts List (J to W)

GPM Bearing Pumps Quick Reference J-W

Bearing Pump Motor Dimensions - Series 120

GPM Bearing Pump & Motor Dimensions-1

Bearing Pump Motor Dimensions - Series 131

GPM Bearing Pump & Motor Dimensions-2

Bearing Pump Motor Dimensions - Series 151

GPM Bearing Pump & Motor Dimensions-3

Bearing Pump Motor Dimensions - Series 176

GPM Bearing Pump & Motor Dimensions-4

Bearing Pump Porting

GPM Bearing Pump Porting

Bearing Pump Torque Settings

GPM Bearing Pump Torque Settings



GPM Bearing Pumps


Contact us about this Pump Range
Contact Details

Our Locations

Worldwide Head Office and Manufacturing:
15 Moody Avenue, Epping Industria 1, 7460 Cape Town, Western Cape, South Africa

Wholly-owned US Distribution Center:
210 Motor Scooter Drive, Nesbit, MS 38651 – US Website.

Call us

Tel: +27 21 531 9330.   Switchboard Hours:
Monday to Thursday from 07:30 – 16:15. Fridays from 07:30 – 15:00.

Sales are handled through our Distribution Network

Our products are sold worldwide through our international supply chain network and our wholly-owned US distribution facility. See our distribution network here.
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