NSH50-10D-4 Tandem Hydraulic Gear Pump With 50+10 Cc Sections

NSH50-10D-4 Tandem Hydraulic Gear Pump

Olive Branch Hydraulics supports China-manufactured NSH50-10D-4 tandem gear-pump enquiries for Russian and CIS mobile equipment. The nominal combination is 50 + 10 cm³/rev. A larger front pump section and a smaller rear section share one drive, allowing two hydraulic circuits to receive different nominal flows at the same shaft speed. Send the complete old-pump marking and installation details for configuration review.

A 50+10 Combination for Two Flow Requirements

The supplier reference photographs show the larger front aluminium housing, the step down to the smaller rear housing and the individual machined oil-port faces. The front mounting flange has four mounting holes, and an exposed splined drive shaft is visible in the shaft-end photograph. The rear angled view shows the smaller section and its four cover bolts.

With equal shaft speed, nominal 50 and 10 cm³/rev displacements give a theoretical flow ratio of 5:1. Actual delivered flow depends on operating pressure, speed, oil condition and volumetric efficiency. This nominal ratio does not specify the actual machine circuit, inlet routing or pressure capacity. Confirm both sections on the supplied installation drawing.

Model Names and Russian Enquiry References

Relevant names include NSH50-10D-4, NSh50-10D4, NSH50/10, НШ50-10Д-4 and НШ-50-10Д-4. Preserve the Cyrillic Д as D in Latin enquiries and retain every execution and rotation suffix from the original marking. Short NSH50-10 and НШ50-10 references help identify a search but do not define a complete interchangeable assembly.

NSH50-10M combinations and other pressure executions require separate confirmation. This is also different from an NSH50-50 equal-displacement tandem or an NSH32-10 assembly. Do not transfer the shaft, flange, installed length or operating limits of those pumps to this 50+10 configuration because they look similar.

Rotation, Shaft and Installation

The photographed supplier reference is identified as right rotation. Specify the required direction viewed from the drive-shaft end and confirm it in writing. The assembled unit must not be assumed reversible. Shaft photographs help with initial identification, but the spline standard, diameters, engagement length and coupling fit require measurements or an approved drawing.

Check the locating diameter, flange thickness, mounting-bolt centres and total installed length. Record the dimensions and connection type of all oil ports, section order and required port orientation. Review the drive torque for the combined circuit loads and any support requirements for the longer tandem assembly. Provide the machine parts-book number and old-pump photographs when available.

Operating Data and Supply Confirmation

State the working pressure, peak pressure, speed range, oil viscosity and temperature for each circuit. Pressure capacity, allowable shaft load, service limits and oil requirements follow the approved data sheet for the exact quoted assembly. Another supplier's catalogue ratings are not an Olive Branch production test result or a guarantee for every pump sold under a shortened 50-10 name.

The three views are supplier reference photographs, not photographs of an Olive Branch production batch. Other-brand identification graphics have been removed from the edited side view; no Olive Branch nameplate has been added. Request confirmation photographs and the installation drawing with the quotation. OEM/ODM and sample review can be discussed using the configuration, quantity and destination.

Frequently Asked Questions

What does 50-10 identify?

It is a nominal 50+10 cm³/rev two-section combination. Confirm each section on the supplied specification.

Does it provide a fixed 5:1 measured flow ratio?

The nominal theoretical ratio is 5:1. Actual circuit flows depend on operating conditions and each section's efficiency.

Is NSH50-10 the same as NSH50-50?

No. The second section has a different displacement and the complete assembly needs its own installation check.

Are D and M versions interchangeable?

Do not assume so. Compare the complete execution code, drawing, mounting interfaces and operating specification.

Which rotation does the reference listing identify?

Right rotation. State the required shaft-end direction in the enquiry and confirm it with the quoted configuration.

What information is needed for a quotation?

Send the full marking, all-side photos, shaft and mounting measurements, oil-port dimensions, circuit requirements and quantity.