The Home Machinist!

You're right, Harold. I'd forgotten the original source of the spiral flute suggestion. Thanks to Russ for that!

Dave

The project is done and the results are in. The winning solution, in my case, is a spiral flute tap as suggested by Harold and the hands down winner on cutting oil is.......drum roll here........cooking spray as suggested by Inspector! I resisted the cooking spray as just too far "out there&quo...

Cooking spray! Who'da thunked? I'll give it a go and thanks.

Dave

Thanks, Harold, for your thoughts and advise! I'd come to the same conclusion about tapping test holes in the same manner as production prior to the customer's parts and will use the wax first. As of yet I don't have an alternative if wax (or something else!) doesn't work. I will also slow the rotat...

Harold, Excellent deductive work! Spiral flute taps are on their way. Can you, or anyone with knowledge on the subject, recommend an appropriate cutting fluid for this application in PVC? I selected a wax listed as appropriate for plastic but am now thinking that it may be too viscous and could comp...

These came in random order, not one right after another. That said the first trashed hole came after very many with no problem and with a plain tap of conventional 4 straight flute design. After changing to a TiN coated bottom tap the typical material extraction came up easily removed with compresse...

After several dozens of holes tapped with the new TiN coated straight flute taps and oil based cutting fluid I still ended up with 5 holes trashed. Very odd as there was no indication leading up to the trashed holes that anything was going south. I pulled the plug on continuing the tapping. I am in ...

Belay that request!

3 drops of Transultex in each hole and it's a different world. The chips come out in the flutes and thread finish is dandy. Just had to get away from it for a bit and ponder. And then there it was: the answer.

Howdy, I've got a project that requires tapping several hundred 10-32 blind holes 1/2 to 5/8" deep in PVC sheet. Needless to say I'm not interested in using a tap handle. I have a versa-tapper but the results are not real good leaving ragged peaks on the threads. I've used both plain and TiN co...

Can you determine shipping cost based on my zip code of 98292?

Bolts, yes or no?

Did the riser come off a Bridgeport? Do you have bolts for it? What is the cost of shipping to 98292?

Thanks, Dave

Well, now you've got my interest! Thanks