Brass Coupler (3-5mm)

The Brass Coupler (3-5mm) is a small rigid shaft coupler made of brass that connects a 3 mm shaft to a 5 mm shaft. It is a quick way to join a small motor to a 5 mm rod, axle, wheel or pulley when the two shaft sizes do not match, and screws on each side clamp the shafts in place. It suits robots, RC models and DIY mechanisms where a compact metal coupling is needed.

Brass Coupler (3-5mm) Specifications

• Material: brass
• Bore sizes: 3 mm on one end, 5 mm on the other
• Type: rigid shaft coupler
• Fixing: screws tighten onto each shaft
• Quantity: 1 coupler

Brass Coupler (3-5mm) Applications

• Connecting a 3 mm motor shaft to a 5 mm rod or drive shaft
• Fitting pulleys, gears and wheels made for 5 mm shafts to small motors
• Drive trains in RC boats, cars and models
• Robotics and DIY mechanisms

What's in the Box

• 1 × brass coupler, 3 mm to 5 mm

Tip: Rigid couplers need the two shafts to be well aligned, otherwise the motor bearings wear and the drive vibrates; switch to a flexible coupler if alignment is difficult. Tighten the screws onto the flat of the shaft if there is one, and use a drop of thread locker where there is a lot of vibration.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.