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Workshop Add Bore & Keyway Service

+ £0.00 (£0.00 each)

Order total (product + machining): £246.00

Price varies by bore size and Bore Qty (per machined hub).

Bore size (Hub 1)

Bore size (Hub 2)

Bore Qty (machined items)

Max equals product quantity.

Please Confirm any Additional Machining Details Required (optional)

Keyway size (optional)

Price Breakdown

Up to 25mm (0.984") – (£15)
Up to 40mm (1.575") – (£20)
Up to 60mm (2.362") – (£30)
Over 60mm (2.362"+) – (£45)

Quantity Discount Breakdown

1 to 5 items: No discount
6 to 9 items: 10% off
10 to 19 items: 15% off
20 to 49 items: 20% off
50 to 99 items: 25% off
100+ items: 30% off

SKU: GR-55 Complete AROFLEX GR Couplings

GR-55 Complete Coupling

Original price was: £328.00.Current price is: £246.00.

ex. VAT · £295.20 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

55mm

Outside Diameter

120mm

Total Assembled Length

160mm

Insert Material

Red Polyurethane (98 Shore A)

Rated Torque (Nominal)

685Nm

Max Speed

4500 RPM (Steel Hub) / 3100 RPM (Cast Iron)

Alignment Tolerance

Radial: 0.38mm / Angular: 1.1° / Axial: -1.2 to +2.2mm

Weight

8.64kg

Dimensions (L × W × H)

12 × 12 × 15.8 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-55	Aroflex part number
Standard Max Bore	55mm
Outside Diameter	120mm
Total Assembled Length	160mm
Insert Material	Red Polyurethane (98 Shore A)
Rated Torque (Nominal)	685Nm
Max Speed	4500 RPM (Steel Hub) / 3100 RPM (Cast Iron)
Alignment Tolerance	Radial: 0.38mm / Angular: 1.1° / Axial: -1.2 to +2.2mm
Weight	8.64 kg
Dimensions	12 × 12 × 15.8 cm	Overall envelope
Bore Tolerance	H7	Precision transition fit
Material	Steel / Friction disc	Standard construction
Certification	ISO 9001:2015	Quality assured

GR-55 Series Complete Coupling

The GR-55 Series is a robust, torsionally flexible industrial coupling designed for high-power transmission and significant 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 substantial shaft misalignments in heavy industrial environments.

Superior Torque Handling: Rated for 685Nm (with Red 98 Sh-A insert), offering the rugged capacity required for high-torque industrial drives, large-scale pumps, and industrial mixers.
98 Shore A Hardness Insert: The high-durometer red polyurethane spider provides exceptional 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 optimized to absorb operational shocks and resonance, significantly extending the service life of bearings and seals in high-mass drive-trains.
Durable Hub Construction: Typically 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 industrial systems.