The Bosch Rexroth PR4 is a fixed-displacement radial piston pump, built for high pressure at modest flow — the pump you reach for when a machine has to clamp, press or lock rather than move a large volume of oil. Twin Hydraulics Engineering supplies PR4 Series 3X pumps in Malaysia.
Series 3X units are available as 3, 5 or 10-spool builds, and can be supplied as a single pump or as a multi-circuit assembly where several independent outlets share one drive shaft — useful where one motor has to feed separate clamping and feed circuits at different pressures. Radial piston construction gives low flow pulsation and quiet running compared with a gear pump at the same pressure, which is why PR4 pumps turn up on hydraulic power packs, clamping and workholding systems, test benches and machine-tool circuits.
The type code carries the number of spools, displacement per spool, port arrangement, pressure setting and shaft form, so the complete string matters when you are ordering a replacement rather than a new build.
What we need to quote: the full PR4 type code and material number from the pump nameplate, drive speed and direction of rotation, the flow and working pressure you need, and quantity. A nameplate photo covers most of it.
Related: PR4 Series 1X, the parent Radial Piston Pump range, and the axial piston alternatives under Axial Piston Variable Pump and Axial Piston Fixed Pump. Background reading: Bosch Rexroth Hydraulic Pumps: A Practical Buyer’s Guide and What Is a Hydraulic Power Pack? A Practical Guide.
Twin Hydraulics Engineering, Malaysia — send us a type code and we will confirm availability and price.
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