maxraygreen Report post Posted July 8, 2020 Greetings to all. Can someone please count the number of cogs or teeth in a 108w20 timing belt. i may need a users manual as well. I just acquired a singer 108w20 cylinder bed machine. It was on a mattress binding table with gear driven advancing mechanism The timing belt is no longer made. My plan is to obtain a cog belt for a singer 144 then cut to length. Join it with some sort of super glue. Then take a 4 inch piece of the cog belt, grind off cogs then sew it on belt at the splice point. I have tried for a week to find a belt. My other hope is to know the number of cogs then find a belt that might be too wide and slice it down Thanks ray Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted July 8, 2020 (edited) Hey Ray, It has 35 teeth & here's a manual. 108u20.pdf Edited July 8, 2020 by CowboyBob Quote Share this post Link to post Share on other sites
Constabulary Report post Posted July 8, 2020 College Sewing in the UK once had Singer 108 timing belts but seems they are sold (parts # 224513) but I would check with them if you cant find them in the US. Maybe you are interested in how I set up my Singer 108w20. I haven linked a parts list and a manual with instructions for replacing the timing belt in the 1st post: Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted July 8, 2020 38 minutes ago, Constabulary said: College Sewing in the UK once had Singer 108 timing belts but seems they are sold (parts # 224513) but I would check with them if you cant find them in the US. Maybe you are interested in how I set up my Singer 108w20. I haven linked a parts list and a manual with instructions for replacing the timing belt in the 1st post: I checked with 2 different suppliers of parts here & they both say they are discontinued! Quote Share this post Link to post Share on other sites
maxraygreen Report post Posted July 8, 2020 Thanks for responses, college says no. This site seems to be the only place on the net with user info on this machine. I could not download the user manual from here until I joined. Got it now. I do have an extra table, motor, stand that i can use. First I have to make timing belt. Now to find belt length or cog count is a better measurement. Quote Share this post Link to post Share on other sites
maxraygreen Report post Posted July 8, 2020 2 hours ago, CowboyBob said: Hey Ray, It has 35 teeth & here's a manual. 108u20.pdf Thanks very much Quote Share this post Link to post Share on other sites
maxraygreen Report post Posted July 8, 2020 My counts indicates 20.5 inch long and 35 teeth. Now to find one. Quote Share this post Link to post Share on other sites
maxraygreen Report post Posted July 8, 2020 In searching I found this. Length and teeth are correct, wonder about wideth. Quote Share this post Link to post Share on other sites
Constabulary Report post Posted July 9, 2020 (edited) I have a 108w20, 143w2 (not 144w) and 107w1 - all have 35 teeth and the teeth are ~17mm wide and ~5.8 - 6mm long on all 3 belts. The spacing between the teeth on the 107w and 143w is 10.1 -10-2mm. I cannot take measures on the bottom side on the 108w ATM cause it is mounted to a table but when I measure on the top side of the upper pulley it seems to be 9.9mm - thats quite close but I cannot evaluate the amount of wear cause all machine have different degrees of wear. I think when the belts where equal they would have the same parts number. I´m pretty sure the 144w belt is wider, I guess like then111 type belts. approx 22mm BTW - in a German sewing machine Forum a guy installed on a 307G2 a new "industrial standard" upper and lower pulley (but he modified pulley bore) and a new timing belt maybe worth playing with this idea Edited July 9, 2020 by Constabulary Quote Share this post Link to post Share on other sites
lambchop Report post Posted July 9, 2020 Mc Master Carr sells timing belts by the foot, if that helps. Dave Quote Share this post Link to post Share on other sites
