Hydraulic Gear Motors

Robust, high-speed, and versatile: The gear motors (external gear motors) from Roquet efficiently convert hydraulic pressure into rotary motion. We stock the complete range – from lightweight aluminum motors to heavy-duty cast iron versions, optionally available with an outboard bearing for belt drives.

Roquet Gear Motors: The Right Series for Every Application

The choice of housing material determines weight and maximum pressure. Roquet offers a modular platform that we supply directly from stock.

The Series at a Glance

Series G (Size 2, Alu): The all-rounder (successor to Series L). Lightweight aluminum housing, high speeds (up to 3,500 rpm), and pressures up to 275 bar. Ideal for fan drives and mobile applications.
Series PLA (Size 3, Alu): The powerful aluminum version for larger flow rates up to 56 cc/rev. Compact yet powerful.
Series PNA (Size 3, Cast Iron): The "Heavy Duty" solution. The cast iron housing enables extremely high continuous pressures (up to 300 bar) and minimizes noise emissions. Perfect for tough continuous operation.

Special Solution: Gear Motor with Outboard Bearing

A technical highlight of our range is the option for an integrated outboard bearing. Standard hydraulic motors cannot handle high radial loads on the shaft.

The Problem: With V-belt or chain drives, enormous lateral forces act on the motor shaft, which would destroy standard bearings.
Our Solution: Roquet motors with outboard bearings absorb these forces, allowing direct drive of pulleys or fans.

Technical Options for Professionals (Valves & Drain Ports)

Beyond the standard, we offer important modifications for demanding circuits:

Integrated Valves: We supply end covers with built-in valves – from simple relief valves to proportional pressure relief (especially for Series G fan drives).
High Back Pressure & Case Drain: For series connections or high return pressures, versions with external drain ports (leak oil) and reinforced seals are available.
Direction of Rotation: Many motors are configurable as reversible (for clockwise and counter-clockwise rotation).
Flanges: Available with common standards such as DIN 5462 (truck PTO), SAE-A, SAE-B, and various shaft types.

Request Suitable Roquet Motor

Do you need a replacement for a Roquet 1M / 5M or are you looking for a motor with an integrated relief valve? Send us the details of your old part or your requirements – we will find the matching replacement.

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Front view of a gear pump size 2 series G from Roquet

Details

Gear Motors in Various Flange and Shaft Combinations by Roquet

Gear Motors are available in cast iron or aluminum. Various flange and shaft combinations as well as oil connections are available. The choice of materials and the manufacturing process ensure highest quality and operational reliability. In addition to standard units, special variants are also available. Optionally increased back pressure possible End covers with pressure relief valves or flow control valves Additional bearings The high maximum speed and the high operating pressure open up a wide range of applications. Product Advantages Modular system and a wide variety of options Material selection and manufacturing process for highest quality High maximum speed combined with high operating pressures Using the shopping cart function, you can send us an inquiry. We will contact you promptly to help you select the design suitable for your application!