GR-28 Complete Coupling

Original price was: £76.00.Current price is: £57.00.

ex. VAT · £68.40 inc. VAT

JS9 Tight Fit Anti-Roll H7 Precision Transition Fit ISO 9001 Manufactured

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

Technical Specifications

Weight

1.24kg

1.24 kg

Dimensions (L × W × H)

6.5 × 6.5 × 8.9 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-28	Arrow part number
Dimensions	6.5 × 6.5 × 8.9 cm	Overall envelope
Weight	1.24 kg
Bore Tolerance	H7	Precision interference fit
Material	Steel / Friction disc	Standard construction
Certification	ISO 9001:2015	In-house engineered

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GR-28 Series Complete Coupling

The GR-28 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 160Nm (with Red 98 Sh-A insert), providing the necessary capacity for medium-duty pumps, compressors, and general industrial gearboxes.
98 Shore A Hardness Insert: The high-durometer red polyurethane spider offers 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 industrial drive-trains.
Durable Hub Construction: Typically supplied in high-quality sintered steel or cast iron (GJL), 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.

Technical Specifications

Parameter	Specification
Standard Max Bore	38mm
Outside Diameter	65mm
Total Assembled Length	90mm
Insert Material	Red Polyurethane (98 Shore A)
Rated Torque (Nominal)	160Nm
Max Speed	8,500 RPM (Steel Hub) / 5,850 RPM (Cast Iron)
Alignment Tolerance	Radial: 0.25mm / Angular: 0.9° / Axial: -0.7 to +1.5mm