>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.