1.7*0.74*0.4m Mill / Router building...

**Wobblybootie** · 17-12-2010

Sorry, I had not read the whole thread, I assumed that with a bed of the size you have, you would be machining wood etc. Phil, there are plenty of machines out there using an MDF surface, the MechMate springs to mind and that is one serious machine!! Others use the threaded inserts in the lower board and epoxy to secure them with a drilled replaceable spoil board above. However I guess to machine metals you will be using some form of coolant in which case MDF is a total NO NO.

**M250cnc** · 17-12-2010

The point is, this type of clamping just will not work for a machine vice 4th Axis etc.

The Tee Slot nut will just pull straight out through the MDF or you only clamp with finger pressure:rofl:

Phil

**Jonathan** · 17-12-2010

Originally Posted by M250cnc

The Tee Slot nut will just pull straight out through the MDF or you only clamp with finger pressure:rofl:

That's why I suggested in my last post putting a thin sheet of steel under the top MDF layer, so that T-nut is pressing on the steel, not MDF.

I like the idea of threaded inserts, but they're not so versatile as T-slots.

**M250cnc** · 17-12-2010

Originally Posted by Jonathan

That's why I suggested in my last post putting a thin sheet of steel under the top MDF layer, so that T-nut is pressing on the steel, not MDF.

I like the idea of threaded inserts, but they're not so versatile as T-slots.

Jonathan, you have a lot to learn.:whistling:

Phil