Making A Shrinking Disc #5

[snotzalot]

Photo 18 - Since I didn't want to machine a female part to press the dimple, I pressed this dimple using my arbor press and tooling with a sand filled beater bag under the disc. It worked great. A piece of hard rubber would work too.



Photo 18a - Dimple (Note if your backing disc doesn't require a dimple and the lock nut protrudes from the disc, don't worry since you are using the edge of the shrinking disc.)



Photo 19 - Disc installed



Photo 20 - Complete, ready to go, note this is a 9" grinder from Grizzly:



http://www.grizzly.com/products/item...emnumber=G9911

Cost for the grinder $69.00 and it has a slow start and the proper 6,200 rpm speed. The arbor threads are metric and most tooling you find is english, BUT a standard 5/8" accessory will fit these metric threads.

Conclusion - It was a fun project which took some time to find the SS, purchase the grinder, and make the tooling.

Would I do it again? If you have the time and want to learn something new, yes! If I was short on time, didn't have needed equipment and wanted to get on with metal shaping, I'd call John Kelly http://www.ghiaspecialties.com/ and order one of his. He charges around $50 bucks and a bargain at that price!