Source for timing pulleys larger then 72 teeth

[bgolash]

Hi

I need to change my X axis reduction to 4.7:1. The ratio works out
to a 72 and a 15 tooth HTD timing pulley. I`m wondering if the pulley
is too small to bore out to 1/2 for my servo shaft. Also..I`ll take a
guess that there isn`t much tooth engagment with a 15 tooth. It seems
the HTD series only goes to 72 teeth. Does someone know of a source
for a different class of timing pulley that goes higher then 72 teeth.

Barry

[bborb]

http://www.mcmaster.com/

worth checking

[jane_novo]

HTD 8M-30
part code: 80-8M-30
number of teeth: 80
Type:6W
Mat: CAST IRON
Dp:203.72
De:202.35
Dm:100
F:38
L:48
d:15
for more information contact with jane_novo@hotmail.com

[Larry83301]

Here is an outfit that has HTD pulleys up to 192 grooves, might have what you want.

http://www.wyko.co.uk/pulleys/htd_pulley.asp

Larry

[harryn]

If you need a very high gear reduction, it might be worthwhile to consider a worm gear arrangement. boston gear.