Gerotor Hydraulic Motor MR 80 C/4 from M+S Hydraulic (Bulgaria)

The gerotor hydraulic motor MR 80 C/4 is a reliable low-speed hydraulic motor from the manufacturer M+S Hydraulic (Bulgaria), supplied under the Hidros brand. The device has a displacement of 80.3 cm³/rev and is designed for a maximum operating power of 12.5 kW. The main inlet ports are located on the side and have G1/2" threads, while the drain port has a G1/4" thread. The MR series design incorporates special rollers in the gear ring, ensuring even load distribution across the teeth, reducing friction and wear — this increases drive efficiency even at high pressure and extends the hydraulic motor's service life. Various shaft, flange, and port configurations are available to meet specific customer needs.

Shaft and Seals:

• Straight shaft Ø25 mm, parallel key A8x7x32 according to DIN6885
• Standard shaft seal
• Other shaft options available upon request (see specifications in PDF)

Application:

• Designed for various special machinery and industrial equipment

Key Parameters of MR 80 C/4:

• Displacement: 80.3 cm³/rev
• Maximum operating speed: 750 rpm
• Torque: 200 Nm
• Maximum operating power: 12.5 kW
• Maximum operating pressure: 175 bar
• Flow rate: 60 l/min
• Weight: 6.9 kg

Operating Recommendations

• Avoid simultaneous short-term high speed and short-term high pressure.
• Recommended filtration level corresponds to cleanliness code ISO 20/16. Nominal filtration is 25 µm or higher.
• It is recommended to use high-quality mineral-based hydraulic oil: HLP (DIN 51524) or HM (ISO 6743/4).
• Recommended minimum oil viscosity: 13 mm²/s [70 SUS] at 50°C [122°F].
• Recommended maximum system operating temperature: 82°C [180°F].
• To ensure optimal hydraulic motor service life, before operating under maximum load, fill the system with working fluid and warm up the unit at moderate load and speed for 10–15 minutes.

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