VICKERS
Frequently asked questions
Common questions about VICKERS from 3G Electric.
What are the mounting and port specifications for Vickers J Series hydraulic motors?
Vickers J Series hydraulic motors use a 5-bolt mounting flange with 1/4"-28 UNF mounting threads. The port connections are 9/16"-18 UNF. This mounting and port configuration is consistent across the J Series models listed, including those with displacements from 0.5 cu in/rev to 3.0 cu in/rev. The 5-bolt pattern and UNF threads are standard in many North American hydraulic systems, allowing direct replacement without adapter plates. When ordering, verify that your manifold or bracket matches the 5-bolt pattern and that your fittings are compatible with 9/16"-18 UNF ports.
What is the maximum pressure rating for Vickers J Series hydraulic motors?
The maximum pressure rating for Vickers J Series hydraulic motors varies by displacement. Models with 0.5 cu in/rev, 0.8 cu in/rev, and 1.2 cu in/rev displacements are rated to 2,030 psi. The 1.9 cu in/rev model is rated to 1,750 psi, and the 3.0 cu in/rev models are rated to 1,400 psi. These ratings reflect the continuous duty pressure limit for each displacement. Operating above the rated pressure may reduce service life or cause internal damage. Always confirm the pressure rating of the specific part number before installation.
How do I select the correct Vickers J Series motor displacement for my application?
Selection depends on required output speed and torque. For a given hydraulic flow rate, a smaller displacement motor will turn faster but produce less torque per unit of pressure. For example, the 0.5 cu in/rev model reaches 1,992 RPM at maximum rated flow, while the 3.0 cu in/rev model reaches 393 RPM. If your application requires high speed and low torque, choose a smaller displacement. If it requires low speed and high torque, choose a larger displacement. Also consider the pressure rating: higher displacement models have lower maximum pressure. Match the motor's continuous pressure rating to your system's operating pressure.
What are the speed ratings for Vickers J Series hydraulic motors?
Maximum speed ratings for Vickers J Series motors range from 393 RPM to 1,992 RPM. The 3.0 cu in/rev models (MPN 129-0458 and 129-0470) are rated to 393 RPM. The 1.9 cu in/rev model (MPN 129-0342) is rated to 650 RPM. The 1.2 cu in/rev models (MPN 129-0293 and 129-0341) are rated to 1,043 RPM. The 0.8 cu in/rev model (MPN 129-0340) is rated to 1,575 RPM. The 0.5 cu in/rev models (MPN 129-0339 and 129-0291) are rated to 1,992 RPM. These speeds are maximum values; actual speed depends on flow rate and load.
Are Vickers J Series hydraulic motors suitable for continuous duty?
Vickers J Series hydraulic motors are rated for continuous duty at pressures up to their published maximum pressure rating. However, continuous operation at maximum pressure and speed may affect service life. For extended life, operate at or below 80% of the maximum pressure rating and ensure proper filtration and cooling of the hydraulic fluid. The motors are positive-displacement type and can be used in both continuous and intermittent duty applications. Always refer to the specific part number's specifications and consider the duty cycle of your application when selecting a motor.
What is the difference between Vickers J Series motors with the same displacement?
Vickers J Series motors with the same displacement may have different manufacturer part numbers due to variations in shaft type, port configuration, or internal features. For example, MPN 129-0293 and MPN 129-0341 both have 1.2 cu in/rev displacement and 2,030 psi rating, but they are distinct part numbers. The differences may include shaft diameter, keyway, or mounting flange details not fully captured in the summary specifications. When replacing a motor, always match the manufacturer part number exactly or verify that the alternative has identical mounting, shaft, and port dimensions. Consult the detailed product data for each part number.
