Precision lathe cross slide in today, out tomorrow ?

dennh · Oct 19, 2006

Saw a posted inspection sheet for a Monarch 10EE where the cross slide perpendicularity was 0.0000"

Since typically this can range from zero to about 0.0005" concave only, does this mean that the machine is out of spec in a few months? It WILL wear and if it starts out at the limit, has no room to move.

John Michael · Oct 19, 2006

Lathe manufacturers have to have a tolerence too, they can't make everything perfect just as we can't. Since you never want the faces to cut convex, the tolerence is perfectly square to concave a small amount. Wear probably won't change the alignment, if it starts out square it will probably stay square. On some lathes the squareness if affected by the leveling.

jim rozen · Oct 19, 2006

Also notice that many lathes have the tailstock
ram start out a thousanth or two above center.

The idea is, as it wears it comes in closer to
ideal. Basically it doubles the effective
lifetime that this particular parameter is "in
spec."

Jim

dsergison · Oct 19, 2006

i bet they naturally wear the other way, since the load is on he tool post nearer teh operator end they will vear more near the operator, and thus into you spec more.

gwilson · Oct 19, 2006

I agree with the statement that the cross slide that starts out faceing a bit hollow will wear in such a way as to face flatter.But I've also seen them wear to face in a bit of a convex surface curve.

dsergison · Oct 19, 2006

I tried to say that they wear into facing more concave

John Michael · Oct 19, 2006

Tailstocks may also start out a tad high because the builder knows the headstock is going to raise up a bit when it warms up.

Search

Largest Manufacturing Technology Community on the Web

Search

Precision lathe cross slide in today, out tomorrow ?

dennh

Stainless

John Michael

Hot Rolled

jim rozen

Diamond

dsergison

Diamond

gwilson

Diamond

dsergison

Diamond

John Michael

Hot Rolled

Similar threads