ZF 635501597 – Bearing for ZF25M Marine Gearbox Ø31.75 × Ø59.13 × 15.88 mm

ID 1232600

$ 59.14

1-2 weeks delivery time

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ZF 635501597 is a high-speed ball bearing engineered for the ZF25M marine gearbox. With dimensions Ø31.75 × Ø59.13 × 15.88 mm, dynamic load rating 39.3 kN, and speed capacity up to 8500 RPM (oil), it supports both axial and radial loads. Made from corrosion-resistant, case-hardened steel, it ensures reliable operation in saltwater environments and minimizes wear under high-speed, high-load conditions.

Description
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ZF 635501597 – Bearing for ZF25M Marine Gear System

The ZF 635501597 bearing is a precision-engineered ball bearing designed specifically for the ZF25M marine gearbox. With a bore diameter of 31.75 mm, an outer diameter of 59.13 mm, and a width of 15.88 mm, it supports both radial and axial loads in compact propulsion assemblies. Manufactured from high-strength, corrosion-resistant steel and heat-treated for enhanced fatigue resistance, this bearing delivers smooth and efficient operation in high-speed marine environments. Its open design facilitates easy lubrication and heat dissipation, reducing friction and extending service life in saltwater conditions.

Key Features:

Designed for ZF25M marine gearbox – exact OEM fit
Supports radial and axial loads for propulsion efficiency
Dynamic load capacity: 39.3 kN / Static load: 47.5 kN
Speed rating: up to 8500 RPM (oil), 6300 RPM (grease)
Open-type design for efficient lubrication and cooling
Corrosion-resistant finish ideal for marine environments
Case-hardened steel construction for wear and fatigue resistance
Low-friction, low-vibration design ensures quiet operation

Specifications:

Part Number	ZF 635501597
Compatible Model	ZF25M Marine Gearbox
Bore Diameter (d)	31.750 mm
Outer Diameter (D)	59.131 mm
Width (T)	15.875 mm
Dynamic Load Rating	39.3 kN
Static Load Rating	47.5 kN
Max Speed (Oil)	8500 RPM
Max Speed (Grease)	6300 RPM
Material	High-strength steel with anti-corrosion treatment
Clearance	C3 (increased radial play)
Seal Type	Open (no seals)
Operating Temp.	–30°C to +120°C
Heat Treatment	Case-hardened for fatigue resistance
Lubrication	Oil or grease compatible
Application	Marine propulsion, gearboxes, mechanical systems

Compatibility and Application:

This bearing is purpose-built for the ZF25M marine gear system, offering optimal integration and high-performance sealing in propulsion assemblies. It is ideal for use in boats, yachts, and other marine vessels operating in saltwater environments. Its corrosion resistance, speed tolerance, and load-handling characteristics make it a dependable component in marine transmissions requiring high reliability and low maintenance.

Benefits:

Exact fit for ZF25M, ensuring reliable drivetrain performance
Resists corrosion in saltwater conditions
Efficient operation under axial and radial loads
Supports high-speed rotation with low noise and vibration
Open design promotes easy lubrication and thermal stability
Reduces wear and maintenance frequency
Improves longevity of marine gear systems