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Workshop Add Bore & Keyway Service

+ £0.00 (£0.00 each)

Order total (product + machining): £162.00

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: GS-28 Complete AROFLEX GS Zero Backlash Couplings

AROFLEX GS-28 Zero Backlash Complete Jaw Coupling

Name: AROFLEX GS-28 Zero Backlash Jaw Coupling | UK Stock | Arrow Engineering
SKU: GS-28
Price: 162.00 GBP
Availability: InStock

£162.00

ex. VAT · £194.40 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

38mm

Outside Diameter

65mm

Total Assembled Length

90mm

Insert Material

Red Polyurethane (98 Shore A)

Rated Torque (Nominal)

190Nm

Max Speed

5850 RPM (Standard Hub Limit)

Alignment Tolerance

Radial: 0.25mm / Angular: 0.9° / Axial: ±1.5mm

Weight

1.24kg

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	GS-28	Aroflex part number
Standard Max Bore	38mm
Outside Diameter	65mm
Total Assembled Length	90mm
Insert Material	Red Polyurethane (98 Shore A)
Rated Torque (Nominal)	190Nm
Max Speed	5850 RPM (Standard Hub Limit)
Alignment Tolerance	Radial: 0.25mm / Angular: 0.9° / Axial: ±1.5mm
Weight	1.24 kg
Dimensions	6.5 × 6.5 × 8.9 cm	Overall envelope
Bore Tolerance	H7	Precision transition fit
Material	Aluminium	Standard construction
Certification	ISO 9001:2015	Quality assured

GS-28 Series Complete Coupling

The GS-28 Series is a high-precision, zero-backlash coupling designed for demanding industrial automation and CNC applications. This complete set features two high-grade aluminium hubs and a precision-moulded polyurethane spider, engineered to deliver high torsional stiffness with effective vibration damping.

Superior Torque Handling: Rated up to 190Nm (with Red 98 Sh-A insert), making it ideal for high dynamic loads, frequent reversing cycles, and high-performance servo-driven applications.
98 Shore A Hardness Insert: The high-durometer red polyurethane spider provides excellent resistance to oils, chemicals, and elevated temperatures (-30°C to +90°C continuous / up to 120°C peak).
Zero-Backlash Design: The straight jaw profile operates under pre-stress, ensuring a play-free connection—essential for CNC positioning systems and precision drives.
Lightweight Aluminium Hubs: Precision-machined aluminium hubs reduce rotational inertia, enabling high-speed operation and improved dynamic response for fast-cycling machinery.
Fail-Safe Operation: Designed to continue transmitting torque even if the spider suffers wear, providing a critical mechanical safety buffer for expensive drive components.