Bosch Rexroth | SYHDFEE-1X355R-VZB25U99-0576-A0A1V
SYHDFEE-1X/355R-VZB25U99-0576-A0A1V
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The SYHDFEE-1X/355R-VZB25U99-0576-A0A1V belongs to the SYD Hydraulic Control Systems series from Bosch Rexroth and serves as a modular element for flow and pressure regulation in hydraulic automation. A displacement of 355 cm³ per revolution defines the volume delivered to actuators each cycle, while a maximum operating pressure of 350 bar allows the unit to function in high-pressure circuits. Its base pump supply is external, so the assembly can draw fluid from a remote pump skid instead of an integrated source. The unit operates on mineral oil that meets DIN 51524 HL/HLP to maintain seal compatibility and lubrication quality. Clockwise rotation aligns the shaft with standard right-handed drive motors, and the housing is designed to tolerate up to 4 bar absolute internal pressure to prevent case deformation. A four-hole ISO 3019-2 connection flange provides standardized mounting to manifold blocks or pump adapters.
Bearing flushing flow is fixed at 15 l/min to keep roller elements cooled and free of contamination during continuous duty. Port Z uses an M14 × 1.5 thread with a 12 mm bore and is limited to 50 bar absolute, supplying auxiliary pilot flow without overloading the port wall. Two diagnostic points are provided: an M14 × 1.5 measuring port labeled Mb for metric test fittings and a G1/4 port labeled Mb1 for quick connection of British standard gauges. Pressure and suction ports B and S follow SAE geometry with a 90° offset so hoses can be routed away from the flange face. A nominal supply voltage of 24 V DC powers internal solenoids, and the control electronics draw only 0.6 A, reducing the load on machine power supplies.
Technical Specifications
Base Pump Supply
External
Bearing Flushing Flow
15 l/min
Connection Flange
ISO 3019-2 4-Hole
Direction Of Rotation
Clockwise
Displacement
355 cm3/rev
Housing Pressure Max
4 bar(abs)
Hydraulic Fluid
Mineral Oil (DIN 51524 HL/HLP)
Max Operating Pressure
350 bar
Measuring Port Mb Thread
M14 x 1.5
Measuring Port Mb1 Thread
G1/4
Port Z Max Pressure
50 bar(abs)
Port Z Thread
M14 x 1.5 (12 mm)
Ports B & S
SAE, 90° Offset
Rated Current Consumption
0.6 A
Supply Voltage Nominal
24 VDC
1620 Old Apex Road
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