Aluminum Flex Shaft Coupler – 0.250″ to 8mm


Availability: In Stock

This 0.250″ to 8mm shaft coupler has a helical cut that allows for a secure and stable connection even if the shafts are not perfectly aligned. The helical cut also reduces binding and allows for some flexibility in the X, Y, and Z axis, but not in the rotational axis.


SKU: ROB-092 Category: Tags: ,


Shaft couplers are an important part of a CNC machine or drive system – they are designed to connect two drive shafts together. Because things don’t always line up perfectly, these shaft couplers have a helical cut in the body which allows minor flex in the X, Y and Z axis while not allowing any flex in the rotational axis. This design means the coupling will be much less prone to binding due to minor misalignments without contributing any additional backlash.

This specific version is designed to couple a 1/4” shaft to an 8mm shaft and is perfect for connecting our large 125 oz-in Stepper Motor to something like an 8mm Rod or 8mm Lead Screw .



  • 1/4˝ to 8mm coupling
  • Diameter: 19mm
  • Aluminum construction
  • Length: 25mm

Package Contents

  • 1 x Aluminum Flex Shaft Coupler - 0.250˝ to 8mm

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  Difficulty Level

Soldering Skill: N/A
Prototyping Skill: N/A
Programming Skill: N/A

  Product Certifications

  Product Attributes

Weight: 16 g
Shipping Dimensions: 20 × 20 × 28 mm

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

More Information:
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