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Four silver electroplated steel universal joint couplings 23mm long 9mm diameter with wrench and screws

Unique-Bargains

Unique-Bargains 3mm to 3.17mm Universal Joint Coupling 23mm x 9mm Pack of 4

SKU CH-YHP5-BKS7C

Connects two shafts from 3 mm to 3.17 mm with 23 mm long, 9 mm diameter steel couplings, includes wrench and M3×0.5 screws, pack of four

  • Connects 3 mm and 3.17 mm shafts for torque transfer
  • 45# steel with electroplated finish resists wear
  • Large transmission torque with high efficiency
  • Pack of four joints plus wrench and screws
  • Install within allowable eccentricity for stable operation

Universal joint coupling pack

This pack contains four universal joint couplings designed to connect two shafts with different diameters and transmit rotational torque. Each coupling accepts a 3 mm shaft on one side and a 3.17 mm shaft on the other. They are intended for RC model cars, RC boats, 3D printers, snow blowers, grinders and similar DIY projects.

Installation limits

The couplings must be installed within the maximum allowable eccentricity range to function correctly. First mount each half onto its respective shaft, then align and adjust the shafts to the correct position before tightening the supplied M3×0.5 fastening screws with the included wrench.

Shaft diameter compatibility

The decisive specification is the inner diameter pairing of 3 mm and 3.17 mm; the coupling will only join shafts that match those exact sizes. Builders needing to connect shafts of any other diameter cannot use this part.

Highlights

  • Connects 3 mm and 3.17 mm shafts for torque transfer
  • 45# steel with electroplated finish resists wear
  • Large transmission torque with high efficiency
  • Pack of four joints plus wrench and screws
  • Install within allowable eccentricity for stable operation

Specifications

BrandUnique Bargains

Questions about this item

Which inner diameter combination do I need for my 3 mm and 3.17 mm shafts?

Each coupling accepts a 3 mm shaft on one side and a 3.17 mm shaft on the other, so a single pack covers that exact pairing.

What torque can the 45# steel universal joint actually transmit in my RC drivetrain?

The 45# steel construction with electroplated finish is rated for large transmission torque, high efficiency and stable transmission with small gap impact.

Will the M3×0.5 fastening screws hold securely on a 3D-printer leadscrew?

The included M3×0.5 screws clamp each half of the coupling to the shaft, providing a firm hold for leadscrews or motor shafts within the 3 mm to 3.17 mm range.

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