27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) 27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium -... (pack of 1)

Accu Product Code (APC): NBK-XGHW-27C-3-5J

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27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) 27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium -... (pack of 1)

Accu Product Code (APC): NBK-XGHW-27C-3-5J

Key Features

Features an integrated dynamic vibration absorber combined with a high-rigidity disc design for exceptional vibration damping.
Suppresses residual hunting and shortens vibration settling time in servo motor drives, significantly improving positioning accuracy and productivity.
Constructed with a zero-backlash aluminium alloy hub and clamping mechanism, rated for 1.5 Nm of torque.

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Accu Product Code (APC): NBK-XGHW-27C-3-5J
Primary Bore Size (HS): 3 mm
Secondary Bore Size (B): 5 mm
Coupling Diameter (D): 19 mm
Length (L): 29.7 mm
Series: XGHW-C
Finish: Anodised / Anodised / Black Oxide / Black Oxide / Nickel Plating
Finish Classification: Hub / Spacer / Screw / Screw / Rotor
Included FItted Hex Socket Cap Head Screw: M2
Inertial Rotor Diameter (OD): 27 mm
Inertial Rotor Length (H): 13.2 mm
Internal Mounting Distance (E): 9.2 mm
Material: Aluminium - (Grade 2017) / Aluminium - (Grade 2017) / Steel - Chromoly (SCM435) / Stainless Steel - (304) / Stainless Steel - (304) / Steel - Chromoly (SCM435) / Steel - (C45) / Rubber - FKM
Material Classification: Hub / Spacer / Screw / Collar / Disc / Screw / Rotor / Body
Material Family: Aluminium / Aluminium / Steel / Stainless Steel / Stainless Steel / Steel / Steel / Rubber
Material Specification: Aluminium - (Grade 2017) / Aluminium - (Grade 2017) / Chromium-Molybdenum Steel / Stainless Steel - (304) / Stainless Steel - (304) / Chromium-Molybdenum Steel / Steel - (C45) / Fluoroelastomer Rubber
Max Speed: 23000 rpm
Misalignment - Angular: 2°
Misalignment - Axial: +/-0.2 mm
Misalignment - Parallel: 0.12 mm
Moment of Inertia: 4.6×10⁻⁶ kg - m²
Operational Temperatures: -10 °C to 60 °C
Rated Torque: 1.5 Nm
Screw Tightening Torque: 0.5 Nm
Static Torsional Stiffness: 300 Nm/rad
Weight per 100 Units: 4.7 kg

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27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) Description

The 27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) has the following features:

Coupling Diameter (D): 19 mm
Anodised / Anodised / Black Oxide / Black Oxide / Nickel Plating Finish
Hub / Spacer / Screw / Screw / Rotor Finish Classification
Included FItted Hex Socket Cap Head Screw: M2
Inertial Rotor Diameter (OD): 27 mm
Inertial Rotor Length (H): 13.2 mm
Internal Mounting Distance (E): 9.2 mm
Length (L): 29.7 mm
Aluminium - (Grade 2017) / Aluminium - (Grade 2017) / Steel - Chromoly (SCM435) / Stainless Steel - (304) / Stainless Steel - (304) / Steel - Chromoly (SCM435) / Steel - (C45) / Rubber - FKM
Hub / Spacer / Screw / Collar / Disc / Screw / Rotor / Body Material Classification
Aluminium / Aluminium / Steel / Stainless Steel / Stainless Steel / Steel / Steel / Rubber Material Family
Aluminium - (Grade 2017) / Aluminium - (Grade 2017) / Chromium-Molybdenum Steel / Stainless Steel - (304) / Stainless Steel - (304) / Chromium-Molybdenum Steel / Steel - (C45) / Fluoroelastomer Rubber Material Specification
Max Speed: 23000 rpm
Misalignment - Angular: 2°
Misalignment - Axial: +/-0.2 mm
Misalignment - Parallel: 0.12 mm
Moment of Inertia: 4.6×10⁻⁶ kg - m²
Operational Temperatures: -10 °C to 60 °C
Primary Bore Size (HS): 3 mm
Rated Torque: 1.5 Nm
Screw Tightening Torque: 0.5 Nm
Secondary Bore Size (B): 5 mm
Series: XGHW-C
Static Torsional Stiffness: 300 Nm/rad

Discover more about the High-Gain Couplings range.

High-gain couplings are flexible shaft couplings built around a single, one-piece moulded rubber core that transmits torque while absorbing vibration and taking up shaft misalignment between a motor and a driven component. That moulded core is what sets them apart: it flexes to smooth out running, so they behave as vibration damping couplings rather than a stiff, solid link. Accu stocks the NBK high-gain range across more than 1,200 configurations, giving design and automation engineers a precise fit for servo and stepper drive systems.

How High-Gain Flexible Shaft Couplings Work

A high-gain coupling clamps onto two shafts through aluminium hubs, with the moulded rubber core bridging the gap between them. As the drive shaft turns, the core transmits torque to the driven shaft while its elasticity absorbs vibration and accommodates small angular, parallel or axial misalignment. Because the core is one integral moulded piece rather than a separate insert, there is nothing to drop out or replace during fitting.

Take a positioning stage driven by a stepper motor: a high-gain flexible shaft coupling links the motor to a ball screw, damping the step-by-step pulses so the stage runs smoothly and the encoder reads cleanly. Hubs use clamping-style fixing, with set-screw options across parts of the range, for a secure grip on the shaft.

Materials High-Gain Flexible Shaft Couplings Are Made From

High-gain couplings pair a lightweight metal hub with a moulded elastomer core. Accu supplies them in the following materials:

Aluminium - (Grade 2017): the hub material, a strong yet light aluminium grade in a natural finish that keeps rotational inertia low.
Rubber: the one-piece moulded core that transmits torque, damps vibration and takes up misalignment.

Sizes and Types of High-Gain Couplings Available

High-gain couplings are available with outer diameters from 15 to 68 mm and bore diameters from 3 to 35 mm, so the range covers everything from compact encoder drives to larger motion assemblies. Bores include imperial equivalents such as 6.35 mm, 9.525 mm and 12.7 mm. Matched or mismatched bore pairs let you join two shafts of different diameters.

Body styles cover standard, short and long types, giving you room to work within a tight axial envelope or bridge a longer gap between shaft ends. Hubs use clamping-style fixing, with set-screw options across parts of the range. Where an application needs a stiffer all-metal option in place of a rubber core, a slotted-body spiral beam coupling is worth comparing.

FAQs

Q: How is a high-gain coupling different from a jaw coupling?

A: A high-gain coupling has a single, integral moulded rubber core, whereas a jaw coupling is a three-part assembly with a replaceable spider element between two hubs.

Q: What are high-gain couplings used for?

A: They suit servo and stepper drive systems, encoders, ball screws, actuators and positioning stages where vibration damping, smooth running and misalignment tolerance matter.

Q: Do high-gain couplings absorb vibration?

A: Yes; the moulded rubber core is designed to dampen vibration and smooth torque transmission between a motor and driven shaft.

Q: What bore and outer-diameter sizes are high-gain couplings available in?

A: Outer diameters from 15 to 68 mm and bore diameters from 3 to 35 mm, including imperial-equivalent bores, with matched and mismatched bore pairs.

Q: How do you choose the right high-gain coupling for a servo or stepper application?

A: Match the bore pair to your motor and driven shafts, then check the outer diameter against your space envelope and confirm the body type (standard, short or long) suits the fit.

Q: What material are high-gain couplings made from?

A: The hubs are aluminium (Grade 2017) in a natural finish, paired with a one-piece moulded rubber core.

Shipping Information

Shipping Destinations:

Worldwide view delivery information

Weight (100 items):

4.7kg

Component History

Product First Available:

Tuesday, June 16, 2026

Stock Last Updated:

04:07 PMMonday, August 31, 2026

Specification Last Updated:

Monday, August 31, 2026

Barcodes

APC (Accu Product Code):

NBK-XGHW-27C-3-5J

EAN13 (International Article No.):

5063765180795

ASIN (Amazon Stock Identification No.):

ASIN not defined.

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Primary Bore Size (HS)

Secondary Bore Size (B)

Coupling Diameter (D)

Length (L)

Series

Finish

Finish Classification

Included FItted Hex Socket Cap Head Screw

Inertial Rotor Diameter (OD)

Inertial Rotor Length (H)

Internal Mounting Distance (E)

Material

Material Classification

Material Family

Material Specification

Max Speed

Misalignment - Angular

Misalignment - Axial

Misalignment - Parallel

Moment of Inertia

Operational Temperatures

Rated Torque

Screw Tightening Torque

Static Torsional Stiffness

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27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) 27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium -... (pack of 1)

27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium - (Grade 2017) 27mm x 3mm x 5mm XGHW-C High Gain Flexible Shaft Couplings - High-Rigidity - Inertial Rotor - Vibrational Dampener - Aluminium -... (pack of 1)

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