I just bought a set of mitee-bite t-slot clamps (5/8" t-slot, part 10644) and discovered that the industrial hobbies' t-slots are shallower than the (standard?) t-slots the mitee-bite clamps are designed for. The wide part of the table slots are 10mm deep, and the narrow part is also 10mm deep, for a total of 20mm. However, the clamp's nut's wide part is 7/16" (~11mm) thick, and the total thickness/height is 7/8" (~22mm). IOW, it didn't fit in the slot.
So, I machined ~1mm off the bottom of the clamp nuts, and it now fits, but the top of the nut sticks above the table ~1mm. I didn't mind machining off the bottom of the nut, but I don't know if machining off the top is a good idea-- I'm not sure if it's supposed to stick up above the table or not. I've searched and searched, and I haven't found anyone else whose mitee-bite clamps didn't fit.
Can someone who has used these clamps on other machines tell me if the nut is supposed to be flush or stick up? Also, is it just my table, or do mitee-bite clamps not fit all IH tables?
Cool, thanks for the reply. That's pretty much what I figured, although I don't think it makes much of a difference considering we're supposed to back the clamps off one full turn before engaging the cam, so the hex bit doesn't actually tighten down on the table surface. I am going to machine the top off a bit so I can get the clamp a bit lower for thin work pieces, though.
That brings me to another question-- Since the clamping force is transfered to the 7/16" set screw (less than 0.15 sq. in.; the screw bottom doesn't mate perfectly with the t-slot surface), do these clamps mar the bottom of the t-slot after many uses?
The clamps supposedly have a holding force of 3000 lbs, which would be 20000 psi on the set-screw/t-slot junction if the set screw was perfectly matched to the t-slot. It's probably more like 40000-50000 psi, which is in the ballpark for the yield strength of some steels and cast irons. I'm actually not sure what the table is made of; it doesn't seem to be specified anywhere. Anyone know?
Also, have you (anyone else feel free to chime in here, too) used the TE-CO Nuzzler clamps?
Sorry for all the questions... I'm pretty new to milling and this is the first milling machine I've owned, so I want to take care of it and use it right.