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Posted by Bob Engelhardt on January 25, 2008, 8:33 pm
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I'm putting a new motor on my lathe that has a bigger shaft than the old
pulley. I'm planning on boring out the old pulley (another 1/8"), but
I want to make sure that this is not a Bad Idea before I do. Is it OK?
Considerations so far: there is plenty of meat in the old (cast iron)
pulley; the keyway will be reduced to 1/16" deep, but that should be
enough (?).
Thanks,
Bob
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Posted by Richard J Kinch on January 25, 2008, 8:51 pm
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Bob Engelhardt writes:
> Considerations so far: there is plenty of meat in the old (cast iron)
> pulley; the keyway will be reduced to 1/16" deep, but that should be
> enough (?).
The boring should be fine, but you may need a keyway broach and bushing to
recut the keyway.
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Posted by Gene Kearns on January 27, 2008, 2:22 pm
Please log in for more thread options On Fri, 25 Jan 2008 19:51:13 -0600, Richard J Kinch penned the
following well considered thoughts to the readers of
rec.crafts.metalworking:
>Bob Engelhardt writes:
>
>> Considerations so far: there is plenty of meat in the old (cast iron)
>> pulley; the keyway will be reduced to 1/16" deep, but that should be
>> enough (?).
>
>The boring should be fine, but you may need a keyway broach and bushing to
>recut the keyway.
I agree that the keyseat should be corrected, but it can be done while
in the lathe (or mill), by shaping with a boring bar and appropriately
ground tool.
--
Homepage
http://pamandgene.idleplay.net/MachineShop/index.htm
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Posted by Grant Erwin on January 25, 2008, 8:54 pm
Please log in for more thread options Bob Engelhardt wrote:
> I'm putting a new motor on my lathe that has a bigger shaft than the old
> pulley. I'm planning on boring out the old pulley (another 1/8"), but
> I want to make sure that this is not a Bad Idea before I do. Is it OK?
>
> Considerations so far: there is plenty of meat in the old (cast iron)
> pulley; the keyway will be reduced to 1/16" deep, but that should be
> enough (?).
I sure hope it's OK; I've done it a few times. :-)
But use the lathe (or mill, if that's how you're doing it) to stroke the
keyway deeper. It's a very useful thing to know how to do, and it's easy,
and the tooling is inexpensive.
Grant
--
Posted via a free Usenet account from http://www.teranews.com
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Posted by Terry Coombs on January 25, 2008, 9:12 pm
Please log in for more thread options Grant Erwin wrote:
> Bob Engelhardt wrote:
>
>> I'm putting a new motor on my lathe that has a bigger shaft than the
>> old pulley. I'm planning on boring out the old pulley (another
>> 1/8"), but I want to make sure that this is not a Bad Idea before I
>> do. Is it OK?
>>
>> Considerations so far: there is plenty of meat in the old (cast iron)
>> pulley; the keyway will be reduced to 1/16" deep, but that should be
>> enough (?).
>
> I sure hope it's OK; I've done it a few times. :-)
>
> But use the lathe (or mill, if that's how you're doing it) to stroke the
> keyway deeper. It's a very useful thing to know how to do, and it's easy,
> and the tooling is inexpensive.
>
> Grant
>
Really . I use a boring bar set on center , with a cutter ground
square on the end . Tedious ...
--
Snag
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> pulley; the keyway will be reduced to 1/16" deep, but that should be
> enough (?).