cam retaining bolt size change

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tuffxf
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cam retaining bolt size change

Post by tuffxf » Sun Nov 12, 2017 10:42 pm

G,day,
On a steel roller, came with a 3/8 unc thread.
Are they able to be drilled and tapped for a 7/16 or 1/2" unf or are they too hard?
Thanks very much!
Paul

blown265
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Re: cam retaining bolt size change

Post by blown265 » Mon Nov 13, 2017 1:22 am

Gday Paul
If the opposite end of the cam isn't used, you could test a drill/tap. This will confirm, on your specific core, whether it's feasable.
Regards
Paul

tuffxf
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Re: cam retaining bolt size change

Post by tuffxf » Mon Nov 13, 2017 2:17 am

G,day Paul,
That is a good idea!
Cheers
Paul

jred
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Re: cam retaining bolt size change

Post by jred » Mon Nov 13, 2017 2:44 am

I think that if its a steel billett roller and made out of 8620 material its going to be heat treated and harder than hell to drill and tap lots of luck :D :D :D [-X [-X [-X

pdq67
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Re: cam retaining bolt size change

Post by pdq67 » Mon Nov 13, 2017 6:26 am

Probably drill it with a, "hard-bit", like a Cobalt type.

I was at SEMA years and years ago and a guy was hawking them. He let me drill through the middle of a big Nicholson bastard cut file! Then a rear end leaf spring!

pdq67

DaveMcLain
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Re: cam retaining bolt size change

Post by DaveMcLain » Mon Nov 13, 2017 9:53 am

The center of the cam won't be real hard and it usually is pretty easy to drill and tap to 7/16-20

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