M+S MP Series Gerotor Hydraulic Motor — Replaces Danfoss OMP, Bosch MGP/GMP, Brevini BGE, White WP (155), Zhenjiang BMP - 25–630cc - Needle Bearings Standard Under 100cc

The M+S Hydraulic MP Series is a compact, high-torque, low-speed Gerotor hydraulic motor designed for demanding industrial and agricultural applications. Available in 15 displacement sizes from 25cc to 630cc per revolution, the MP Series is a direct drop-in replacement for motors from Eaton, Parker, White, Danfoss and the Zhenjiang BMP.

M+S Hydraulic has been engineering and manufacturing hydraulic motors since 1963. Every MP Series motor is built to exacting tolerances using mangano-phosphatised steel construction as standard, ensuring long service life even in the harshest operating environments.

All sizes under 100cc (25–80cc) are supplied as the MPN version — needle roller bearings factory-fitted as standard.

Applications

• Conveyors and feeding mechanisms
• Agricultural machinery and grass cutting equipment
• Metal working and textile machines
• Food processing and packaging machinery
• Robotics and manipulator systems
• Any application eliminating gearboxes, chains, belts or speed reduction components

Cross-Reference — Compatible Equivalents

Replacing a competitor motor? Type any part code into the cross-reference tool on our Hydraulic Motors page and it will identify your M+S equivalent instantly.

Displacements & Factory Part Numbers

Every size you select resolves to a real factory part number — what you order is exactly what appears on your invoice and the motor nameplate.

Standard Supply Configuration

• SAE A two-bolt oval mounting flange (82.5mm spigot)
• ø25mm or 1" straight keyed shaft (standard)
• Side ports — ½" BSPP (ISO 228)
• ¼" BSPP case drain port
• Low pressure shaft seal (standard); needle bearings standard below 100cc

Rear-ported version: the MP is also built with rear ½" BSPP ports (factory code E) instead of side ports. It is not on the picker above — call 1300 146 737 or email sales@mhfgc.com.au and we will price it against your build.

How to Order — MP Part Number Breakdown (Nomenclature)

Every M+S MP part number is built from the positions below (per the official M+S nomenclature chart). Our stocked dropdown codes are the ★ standard configuration — e.g. MPN 50 COD = MP + N needle bearings + 50 (49.5cc) + CO 1" keyed shaft + D 150 bar seal.

Seal kits: MP-SKD (150 bar), MP-SKU (200 bar), MP-SKV (Viton), MP-SKB, MPQ-SKD, MPQ-SKU — available on request. Need a code that is not in the dropdown? Use the quote form below — non-standard builds are factory-configured to order.

General Performance Data

• Displacement range: 25–623.6 cc/rev
• Maximum speed: 1,815 rpm
• Maximum torque: 500 Nm continuous / 640 Nm intermittent
• Maximum output: 12.8 kW
• Maximum pressure drop: 140 bar continuous / 175 bar intermittent
• Maximum flow: 75 L/min
• Temperature range: −40°C to +140°C
• Full per-size ratings: see the attached M+S datasheet

Why Needle Roller Bearings Matter — Especially Under 100cc

Standard bearing arrangements in smaller displacement motors are a known weak point when the shaft carries any side load — sprockets, pulleys, chain drives, belt drives or direct wheel mounting all push sideways on the output shaft. Over time that radial load works a standard bearing beyond its design limit: premature bearing wear, shaft scoring and, in the worst cases, a seized or sheared shaft well before the motor's rated life.

Needle roller bearings support the shaft over a much greater contact area, dramatically increasing permissible radial load and reducing the risk of metal binding. In the field that means fewer failures, longer motor life and less downtime on any machine that drives more than a perfectly aligned inline coupling.

Our standard supply policy: every motor we supply under 100cc comes with needle roller bearings factory-fitted as standard. We do not supply plain-bearing motors in this size range unless specifically confirmed for an inline-drive-only application. From 100cc up, needle bearings are available as a custom factory build — contact us for a firm quote.

Not sure whether your setup side-loads the shaft? Send us a photo — we are a working hydraulic service centre and will tell you straight.

Custom Factory Builds

Need a different mount, shaft, port or bearing configuration? M+S builds them all to order — magneto and wheel mounts, splined and tapered shafts, needle bearings on larger sizes. These are factory-quoted builds with their own part numbers and pricing: contact us and we will confirm the exact code and a firm price before you commit. What you can buy instantly above is the standard catalogue configuration — the exact part number shown is exactly what ships.

Download the M+S MP Series Factory Datasheet (PDF)

Technician's Advice

When selecting a motor, match the displacement (cc/rev) to your required output speed and torque — not just the physical envelope. A higher displacement motor produces more torque at lower speed for the same flow rate.

Case drain: always ensure the case drain line is connected and returns to tank with minimal back pressure. An unconnected or blocked drain port is the single most common cause of premature shaft seal failure on orbital motors.

Running in a new motor: fill with fluid and run at moderate load for 5 to 10 minutes before applying full operating pressure. This beds the internal components in correctly and purges air from the case drain circuit. Never run a new motor straight to full load — bedding-in failures are avoidable and not covered by warranty.

If you are unsure which displacement or configuration suits your application, contact us directly. We are a functioning hydraulic service centre with over 20 years of hands-on experience — we are here to help you get it right the first time.

Buy the Seal Kit for This Motor

Warranty & Service

All motors we supply carry a 12-month warranty. Seal kits are available separately. We are an active hydraulic service centre — not just a reseller. If you are identifying an existing motor for replacement, photograph all part numbers, displacement codes and stamped characters on the motor body and send them through with your enquiry.

From Our Workshop

How orbital drive motors work — and how they fail. Recorded in our own service workshop; we rebuild these for a living.

Shipping and Freight Information

We ship hydraulic components across Australia from warehouses in Queensland, Victoria, South Australia, and Western Australia. Because we sell solid steel components — cylinders, pumps, motors, fittings, and hose assemblies — freight costs reflect real weight and real distance. We do not hide freight costs in inflated product prices. What you see is what you pay.

Hydraulic components are manufactured from solid steel. A single motor can weigh between 6 and 10 kg depending on displacement. Freight costs vary by product weight, dimensions, and your delivery location. We have negotiated the best available carrier rates for our volume and absorb a portion of freight cost on every order.

Estimated delivery timeframes:

• Standard parcels: 2–7 business days
• Heavy freight: 3–8 business days
• Orders placed before 12 Midday AEST ship same business day (where stock is available)

Why Buy From Us

• 20+ years of hydraulics expertise — we know what we are selling
• Australian owned and operated — Gold Coast, QLD
• ABN: 92 969 264 674 — registered Australian business
• Secure checkout — Visa, Mastercard, PayPal, Zip Pay, Direct Deposit
• Tax invoices supplied with every purchase
• Messages answered within normal business hours — 8:00am to 5:00pm Monday to Friday
• Phone: 07 5563 1982 or 1300 1 HOSES
• Email: sales@mhfgc.com.au

Out of Stock Policy

It is our intention to maintain active stock on every listed item at all times. On rare occasions, due to high demand or supply constraints, a size may be temporarily unavailable. If this occurs, you will be notified immediately and offered the choice of a full refund or a short wait for incoming stock — typically 3 to 14 days.

Before you order. The 200 bar (U) seal cannot be fitted together with needle bearings. Pick one or the other - if both are selected we will ring you before the order ships. Seal kits follow the mount and the seal you choose, not just the series. This range uses MP-SKB, MP-SKD, MP-SKU, MP-SKV, MPQ-SKD, MPQ-SKU. Give us your full motor code and we will send the right kit.