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Ady1	10/10/2016 10:25:44
6137 forum posts 893 photos	I've had to work on a few case hardened bits over the years and I've found that spot drilling with a carbide tipped masonry tool gets me through the skin and then HSS can get on with the rest of it
Jon Gibbs	10/10/2016 10:53:35
750 forum posts	Those cheap spear-point TCT tile drills are especially handy for such jobs but I'd also have thought grinding a little flat with a Dremel and AlOx wheel would also get the job done.
SillyOldDuffer	10/10/2016 11:12:12
10668 forum posts 2415 photos	If buying new Simply Bearings say in their loose bearing specifications whether a particular type of ball can be drilled or not.
mick70	10/10/2016 11:38:51
524 forum posts 38 photos	all i know is she is an artist/sculptor. she never tells boss what she is working on until it's finished. had me drill and tap some brass rods that she will bend to shape. so we know it's gold and silver colored and that's it. thanks for the info will just wait till he gets them to know exactly what they are made off.
Harry Wilkes	10/10/2016 11:39:01
1613 forum posts 72 photos	Posted by Michael Gilligan on 09/10/2016 21:53:23: Alternatively ... Drill them on the milling machine [or even the drill, if it's really good]; clamped between two pates, each with a bored hole about 2/3 of the ball diameter. MichaelG. I too have used Michael's method worked OK for me H
Ian S C	11/10/2016 09:34:24
7468 forum posts 230 photos	I drilled the annealed bearing ball that I used on the governor of the Stuart Turner S9. I held the balls in the 3 jaw chuck on the lathe, and drilled them with a HSS drill. Ian S C

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