material Aluminum
number of teeth 20
inner diameter 5mm
outer diameter 15mm
height 14mm
setscrews M4 x 0.7 threads, 3.75mm length
setscrew quantity 2
setscrew material Stainless steel
setscrew drive size 2mm hex
max belt width 7mm
pitch GT2 (2mm)
Price $6.00
Quantity Express - 3
Express XL - 3
Purchase The FarmBot Shop
internal part name GT2 Pulley - 20 Tooth
cost $0.85

Component tests

Test Description Target Tolerance
Number of teeth Count the number of teeth on the pulley. 20 +/- 0
Pitch Mate the pulley with a belt and inspect tooth engagement The pulley should fully engage the belt’s teeth at all points of contact. N/A
Tooth width Measure the width of the teeth using digital calipers. 7mm +/- 0.5mm
Overall length Measure the overall length using digital calipers. 14mm +/- 0.5mm
Outer Diameter Measure using digital calipers. 15mm +/- 0.5mm
Hole diameter Measure the diameter of the motor shaft hole using digital calipers. 5mm + 0.05mm
Motor shaft fit Assemble the pulley to a NEMA 17 motor shaft and tighten the setscrews. Pulley should fit snug and concentrically. N/A
Number of setscrews Count the number of setscrews. 2 N/A
Setscrew drive size Use a hex driver to validate the drive size of the setscrews. 2mm N/A
Material Ensure the material is aluminum and stainless steel and will not rust by holding a magnet to the part. Aluminum and stainless steel (no magnetic attraction) Weak attraction to stainless steel is permissible.