GR-38 Complete Coupling

Original price was: £139.00.Current price is: £104.25.

ex. VAT · £125.10 inc. VAT

JS9 Tight Fit Anti-Roll H7 Precision Transition Fit ISO 9001 Quality Assured

In Stock — Dispatches within 24 hours. Bulk orders (10+) available — call for lead time.

Technical Specifications

Standard Max Bore

45mm

Outside Diameter

80mm

Total Assembled Length

114mm

Insert Material

Red Polyurethane (98 Shore A)

Rated Torque (Nominal)

325Nm

Max Speed

7100 RPM (Steel Hub) / 4750 RPM (Cast Iron)

Alignment Tolerance

Radial: 0.28mm / Angular: 1.0° / Axial: -1.0 to +1.8mm

Weight

2.72kg

Dimensions (L × W × H)

8 × 8 × 11.2 cm

Overall envelope

Standards & Fit

JS9

JS9 Keyway Tight fit anti-roll standard

Precision Transition Fit Precision bore fit

ISO

ISO 9001:2015 Quality Assured

Parameter	Value	Notes
SKU	GR-38	Aroflex part number
Standard Max Bore	45mm
Outside Diameter	80mm
Total Assembled Length	114mm
Insert Material	Red Polyurethane (98 Shore A)
Rated Torque (Nominal)	325Nm
Max Speed	7100 RPM (Steel Hub) / 4750 RPM (Cast Iron)
Alignment Tolerance	Radial: 0.28mm / Angular: 1.0° / Axial: -1.0 to +1.8mm
Weight	2.72 kg
Dimensions	8 × 8 × 11.2 cm	Overall envelope
Bore Tolerance	H7	Precision transition fit
Material	Steel / Friction disc	Standard construction
Certification	ISO 9001:2015	Quality assured

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GR-38 Series Complete Coupling

The GR-38 Series is a robust, torsionally flexible industrial coupling designed for reliable power transmission and shock absorption. This complete set features two high-strength hubs and a precision-moulded polyurethane spider, engineered to protect connected machinery by dampening torsional vibrations and compensating for shaft misalignments.

Superior Torque Handling: Rated for 325Nm (with Red 98 Sh-A insert), offering substantial capacity for heavy-duty pumps, large fans, and industrial compressors.
98 Shore A Hardness Insert: The high-durometer red polyurethane spider provides excellent resistance to oils, chemicals, and extreme temperatures (-30°C to +90°C continuous / up to 120°C peak).
Vibration Damping: The curved jaw design is specifically optimised to absorb operational shocks and resonance, significantly extending the service life of bearings and seals in high-torque drive-trains.
Durable Hub Construction: Supplied in high-quality cast iron (GJL) or steel, providing the structural mass and durability required for steady-state industrial power transmission.
Fail-Safe Operation: Designed as a “fail-safe” coupling; the jaws will remain interlocked to transmit torque even if the elastomer spider fails, preventing a complete loss of drive in critical systems.