20t-5 Timing Pulley (Timing Belt Pulley), GT2 pulley

20 teeth, 5 mm bore: the 20t-5 timing pulley (GT2 pulley) is 12.22 mm over the teeth, 17.399 mm over the flanges and 15.875 mm long overall, with M3 set screws in the hub. Here as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 20t-5 pulley
• Model id: gt2-pulleys-20t-5
• Standard: GT2 pulley · size 20t-5

Files

Part key	Simplified
gt2-pulleys-20t-5	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
dp	Pitch diameter		12.73		12.73	nominal	L1
da	Outside diameter		12.22		12.22	nominal	L1
df	Flange diameter		17.399		17.399	nominal	L1
b	Face width between the flanges		7.366		7.366	nominal	L1
bf	Width over the flanges		10.3		10.3	nominal	L0 (nom: one source)
L	Overall length		15.875		15.875	nominal	L0 (nom: one source)
dh	Hub diameter		9.2456		9.2456	nominal	L0 (nom: one source)
lh	Hub length		5.9944		5.9944	nominal	L0 (nom: one source)
de	Face diameter inside the flanges		9		9	nominal	L0 (nom: one source)
ds	Set screw thread		3		3	nominal	L0 (nom: one source)

Drawing

As a PDF: CC-GT2-SZ-20t-5.pdf.

The 20t-5 timing pulley beside the 16t-5 and the 36t-5

The 20t-5 is number 2 of the 7 GT2 pulley timing pulleys published here, listed from 16t-5 to 60t-8.

• Pitch diameter (dp): 12.73 mm on the 20t-5 timing pulley, against 10.19 mm on the 16t-5 and 22.92 mm on the 36t-5.
• Outside diameter (da): 12.22 mm on the 20t-5 timing pulley, against 9.68 mm on the 16t-5 and 22.41 mm on the 36t-5.
• Flange diameter (df): 17.399 mm on the 20t-5 timing pulley, against 14.732 mm on the 16t-5 and 28.067 mm on the 36t-5.
• Face width between the flanges (b): 7.366 mm on the 20t-5 timing pulley, the same on the 16t-5 and the 36t-5.
• Width over the flanges (bf): 10.3 mm on the 20t-5 timing pulley, the same on the 16t-5 and the 36t-5.
• Overall length (L): 15.875 mm on the 20t-5 timing pulley, against 14.2748 mm on the 16t-5 and 18 mm on the 36t-5.
• Hub diameter (dh): 9.2456 mm on the 20t-5 timing pulley, against 14.732 mm on the 16t-5 and 17.1704 mm on the 36t-5.
• Hub length (lh): 5.9944 mm on the 20t-5 timing pulley, against 5.969 mm on the 16t-5 and 7.5692 mm on the 36t-5.

Other sizes

• One size smaller: 16t-5 Timing Pulley (Timing Belt Pulley), GT2 pulley, 16 teeth, 5 mm bore, pitch diameter 10.19 mm, M3 set screws.
• One size larger: 36t-5 Timing Pulley (Timing Belt Pulley), GT2 pulley, 36 teeth, 5 mm bore, pitch diameter 22.92 mm, M3 set screws.

Documents

• CC-GT2-DS-20t-5.pdf: 20t-5 datasheet: values with levels, sources
• CC-GT2-SZ-20t-5.pdf: 20t-5 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

gates-light-power-precision, misumi-gpa-2gt. Full citations: the method page and this size's datasheet.

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