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HARFINGTON Single Groove Pulley 5mm Fixed Bore 20mm Outer Diameter Aluminum Alloy with Hex Wrench for Drilling Machine 6mm PU Round Belt

4.9 (2) Write Review
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$7.79

$ 3 .99 $3.99

In Stock

1.Size:10mmx20mm


  • Size - Aperture Diameter: 5mm; Outer Diameter: 20mm; Overall Thickness: 15mm; Groove Width: 7mm; Groove Depth: 4.4mm; Applicable Belts: 6mm PU round belt.
  • Material - The single-groove pulley is made of aluminum alloy, with small precision error, stable operation, high-speed rotation without shaking, effectively suppressing transmission noise and fluctuations, and improving the stability of the belt operation.
  • Usage - First, you need to measure the diameter of the shaft to be installed. For example, if the diameter of the shaft is 8 mm, the inner diameter of the pulley should be 8 mm, so that the installation will be just right.
  • Application - Silver aluminum alloy single slot is suitable for motors, micro spindles, model transmission design, motor shaft transmission, etc.
  • Note - A belt pulley with an outer diameter of 16mm is not suitable for use together with other sizes of belt pulleys.


Product Description

Single Groove Pulley

How to Choose a Pulley:

Start by measuring the diameter of the shaft that needs to be installed. For example, if the shaft has a diameter of 8mm, choose a pulley with an inner diameter of 8mm. This size will ensure a perfect fit during installation.

Customer Reviews
4.6 out of 5 stars 23
4.6 out of 5 stars 10
4.2 out of 5 stars 15
Outer Diameter 22mm/31mm/41mm/50mm 16mm/20mm/30mm 40mm/60mm/80mm/100mm

J. S.
Reviewed in the United States on October 23, 2024
I have a small motor with a 6 mm D-shaft driving a pulley via a 4 mm polyurethane round belt. This was exactly what I needed to do that. It fits the shaft without slop and the two grub screws keep it secure. This pulley has a nice smooth surface finish, but that actually isn't what I want in order to maximize the grip on the belt. I used a Dremel with a narrow wire brush to scuff up the groove to give it a little more grip.
Michel Amor
Reviewed in the United States on October 15, 2024
Excelente 👌