10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) 10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) (pack of 1)

Accu Product Code (APC): HRCLA-10-3-3-AL

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10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) 10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) (pack of 1)

Accu Product Code (APC): HRCLA-10-3-3-AL

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Accu Product Code (APC): HRCLA-10-3-3-AL
Bore Size (HS): 3 mm Tolerance: +0.01/-0 mm
Overall Length (L): 17 mm
Outside Diameter (D): 10 mm
Hub Length (E): 4 mm
Material: Aluminium - Aerospace (Grade 7075)
Finish: Surtec 650 Passivated
Included Fitted Socket Set / Grub Screw (T): M2
Material Family: Aluminium
Max Inertia g/cm²: 0.43 gcm²
Max Mass g: 3.05 g
Max Speed: 22,000 rpm
Misalignment - Angular: +/-2 Degrees
Misalignment - Axial: +/-0.17 mm
Misalignment - Parallel: +/-0.12 mm
Radial Compliance microns/N: 83 microns/N
Torsional Stiffness Nm/Rad: 16.81 Nm/Rad
Typical Torque Capacity - Non Reversing: 0.45 Nm
Typical Torque Capacity - Peak: 0.75 Nm
Typical Torque Capacity - Reversing: 0.3 Nm
Weight per 100 Units: 305 g

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10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) Description

The 10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) has the following features:

Bore Size (HS): 3 mm
Bore Size (HS) Tolerance: +0.01/-0 mm
Surtec 650 Passivated Finish
Hub Length (E): 4 mm
Included Fitted Socket Set / Grub Screw (T): M2
Aluminium - Aerospace (Grade 7075)
Aluminium Material Family
Max Inertia g/cm²: 0.43 gcm²
Max Mass g: 3.05 g
Max Speed: 22,000 rpm
Misalignment - Angular: +/-2 Degrees
Misalignment - Axial: +/-0.17 mm
Misalignment - Parallel: +/-0.12 mm
Outside Diameter (D): 10 mm
Overall Length (L): 17 mm
Radial Compliance microns/N: 83 microns/N
Torsional Stiffness Nm/Rad: 16.81 Nm/Rad
Typical Torque Capacity - Non Reversing: 0.45 Nm
Typical Torque Capacity - Peak: 0.75 Nm
Typical Torque Capacity - Reversing: 0.3 Nm

Discover more about the Spiral Beam Couplings range.

Beam couplings are flexible shaft couplings machined from a single piece of material, with one or more helical (spiral) cuts running through the body. Those cuts let the coupling flex just enough to take up angular shaft misalignment, while the one-piece construction keeps it zero backlash, so there is no lost motion between the driving and driven shafts. That combination makes beam couplings a compact, accurate choice for connecting small motor, encoder and feedback shafts in precision motion systems.

How Helical Beam Couplings Work

A beam coupling flexes through the helical slit machined into its body. As torque is applied, the spiral cut allows a controlled amount of bend so the coupling accommodates angular misalignment between two shafts, yet it winds up very little, which is what gives the zero-backlash, constant-velocity behaviour designers rely on for positioning accuracy. Because the coupling is a single machined part with no separate insert or elastomer element, there is nothing to wear out or replace. The balanced one-piece body also runs true at high speed, rated up to 70,000 RPM.

Take an optical encoder reading a small servo shaft: a beam coupling links the two so the encoder tracks true angular position without backlash, even if the shafts sit slightly out of line. Where an application needs to damp vibration rather than hold precise position, a rubber-core high-gain coupling is the softer alternative; beam couplings are the stiffer, zero-backlash choice.

Materials Beam Couplings Are Made From

Accu's beam couplings are machined from a single, lightweight aerospace alloy:

Aluminium - Aerospace (Grade 7075): a high-strength, lightweight aluminium with a SurTec 650 passivated finish for corrosion resistance, keeping mass and rotational inertia low for the fast, frequent direction changes of servo and encoder drives.

Sizes and Types of Beam Couplings Available

Accu's beam couplings are the compact Reli-a-Flex Micro range, built for miniature drives. Bore sizes run from 1.5 to 5 mm, outside diameters from 6 to 10 mm and overall lengths from 9.35 to 17 mm, across 18 configurations. The small envelope suits encoder, tachometer and low-torque servo or stepper connections where space is tight and positioning accuracy matters. Every coupling is a one-piece helical-cut design, so the type is consistent across the range; you select on bore, outside diameter and length to match your shafts and space.

FAQs

Q: Are beam couplings zero backlash?

A: Yes; the single-piece helical construction transmits torque with no lost motion, which is what makes them suited to precise positioning and feedback.

Q: What is the difference between a beam coupling and a jaw coupling?

A: A beam coupling is one machined piece with helical cuts, whereas a jaw coupling is a three-part assembly with a replaceable elastomer spider between two hubs.

Q: What sizes do beam couplings come in?

A: The current Reli-a-Flex Micro range covers bores from 1.5 to 5 mm and outside diameters from 6 to 10 mm.

Q: What are beam couplings used for?

A: They connect small motor, encoder and feedback shafts in miniature servo and stepper assemblies where zero backlash and positioning accuracy matter.

Q: What material are beam couplings made from?

A: Accu's beam couplings are machined from aerospace-grade aluminium (Grade 7075-T6) with a Surtec 650 passivated finish.

Shipping Information

Shipping Destinations:

Worldwide view delivery information

Weight (100 items):

0.305kg

Component History

Product First Available:

Thursday, March 9, 2023

Stock Last Updated:

09:53 AMMonday, October 19, 2026

Specification Last Updated:

Monday, October 19, 2026

Barcodes

APC (Accu Product Code):

HRCLA-10-3-3-AL

EAN13 (International Article No.):

5057196003181

ASIN (Amazon Stock Identification No.):

ASIN not defined.

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Bore Size (HS)

Overall Length (L)

Outside Diameter (D)

Hub Length (E)

Material

Finish

Included Fitted Socket Set / Grub Screw (T)

Material Family

Max Inertia g/cm²

Max Mass g

Max Speed

Misalignment - Angular

Misalignment - Axial

Misalignment - Parallel

Radial Compliance microns/N

Torsional Stiffness Nm/Rad

Typical Torque Capacity - Non Reversing

Typical Torque Capacity - Peak

Typical Torque Capacity - Reversing

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10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) 10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) (pack of 1)

10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) 10mm x 3mm x 17mm Reli-a-Flex Micro Flexible Shaft Couplings - Aerospace Aluminium (7075 T6) (pack of 1)

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