Small Flat Belt Pulley re Bobs enquiry
Hello everyone
Here is a follow up to Anorak Bobs recent mention of flat belt & vee pulleys for his Tool & Cutter grinder restoration job.
I made hundreds of these small idler belt tensioners for a 1/4" & 1/2" wide abrasive belt machine,using the Turret attachment on the Hercus 260 lathe.
The pulleys had to spin at 25,000 rpm so concentricity was important.
After drilling & boring to 5 thou undersize & reaming to .625" the pulley was mounted on a mandrel between centres, A plunge cut, with the lathe in back gear using a form tool as shown in the photo was used to form the crown & flanges on the pulley.
Bearings were then loctited into position.
An interesting little bit of turning.:)
regards
Bruce