tolerances on round bar stock

tolerances on round bar stock

Post by Rand » Sun, 24 Jan 2010 04:22:19



Anyone know what the tolerances are for TGP, bearing quality or
accuracy stock?   When you need shaft material to slip fit through a
bearing which do you buy?  It seems steel suppliers around here all
have differant names for any bar that's not just mill tolerances.

Thank You,
Randy

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tolerances on round bar stock

Post by Ned Simmon » Sun, 24 Jan 2010 04:37:58


Quote:

>Anyone know what the tolerances are for TGP, bearing quality or
>accuracy stock?   When you need shaft material to slip fit through a
>bearing which do you buy?  It seems steel suppliers around here all
>have differant names for any bar that's not just mill tolerances.

My supplier specs the OD on 1045 TGP up to 1-1/2" as +.000/-.001.
That's a good fit in pillow block bearings, and the price premium over
1018 or 12L14 cold drawn is not very great. But the standard length
for TGP is 24' rather than 12'. Cold drawn is almost always much
better than the promised tolerance, and a decent fit in pillow blocks,
but obviously you can't count on it.

--
Ned Simmons

 
 
 

tolerances on round bar stock

Post by Rand » Sun, 24 Jan 2010 05:27:35




Quote:

>>Anyone know what the tolerances are for TGP, bearing quality or
>>accuracy stock?   When you need shaft material to slip fit through a
>>bearing which do you buy?  It seems steel suppliers around here all
>>have differant names for any bar that's not just mill tolerances.

>My supplier specs the OD on 1045 TGP up to 1-1/2" as +.000/-.001.
>That's a good fit in pillow block bearings, and the price premium over
>1018 or 12L14 cold drawn is not very great. But the standard length
>for TGP is 24' rather than 12'. Cold drawn is almost always much
>better than the promised tolerance, and a decent fit in pillow blocks,
>but obviously you can't count on it.

Cold drawn is listed as  +/-0.003" on one web site.

I can't find the specs on the others on the web sites of the suppliers
I generally go to.

Thank You,
Randy

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tolerances on round bar stock

Post by Dave » Sun, 24 Jan 2010 06:35:58


Quote:

>Anyone know what the tolerances are for TGP, bearing quality or
>accuracy stock?   When you need shaft material to slip fit through a
>bearing which do you buy?  It seems steel suppliers around here all
>have differant names for any bar that's not just mill tolerances.

>Thank You,
>Randy

>Remove 333 from email address to reply.

http://www.seshafting.com/

db