Is it acceptable to use ER32/ER16 collets for ridged tapping?
Is it acceptable to use ER32/ER16 collets for ridged tapping?
2008 Haas VF2D
OneCNC XR5 Mill Expert
I do. I use ER16 up to 1/4" or M6 and ER32 for larger sizes. I have never had a tap spin in a collet but I have stalled the spindle.
An open mind is a virtue...so long as all the common sense has not leaked out.
Ditto, ER collets are all I have. What else were you considering?
Greg
I have a set of the square collets he mentioned above. It works good when the regular TG or ER collets slip on the tap, which has happened to people in front of me a few times (though perhaps their own fault, who knows). Only thing about the square collets is they seem to be less resilient than a typical spring collet due to their design, or at least the ones I have are. What I mean is that one of the "spring" connections is not present on them (meaning the collet collapses like a spring pin to tighten). Not sure if all of em are like that. But I've broken about half of them. I just use ER now but then again I haven't had to "push" a rigid tapping cycle time in a while using anything other than small threads in aluminum...
Onr time I just loosened the vise then raised the spindle and took everything out and unscrewed the tap holding the part in a bench vise.
That was the easy one. The hard one was a part that needed more machining so I didn't want to disturb the setup. So I unscrewed it by hand which involved unscrewing slightly then jogging Z up a few thou then unscrewing a bit more. It was a taper tap so it became loose quite quickly and then the unscrewing and jogging was easy becaus if I jogged too far it would get tight.
The actual stalling was very peaceful. It just came to a halt and I hit E-stop quickly before any alarms where triggered.
An open mind is a virtue...so long as all the common sense has not leaked out.
And that's when the rigid tap holder is very nice. Just pull up on the quick release and raise the head. Plus no tools required to change the tap.
I like the square collets because of the hard stop. When I have stalled the spindle, I loosen/remove the collet nut and jog z up, remove collet, and hand tap the hole.
Thanks,
Ken Foulks
I must be the odd one out, but all I use for taps is split sleeve tap drivers in tapered holders. I have collet holders but I use them more for endmills.
Just push the button,what's the worst that could happen.
How do the ridged tap holders work? Is it similar to a collet but can be changed in the spindle?
2008 Haas VF2D
OneCNC XR5 Mill Expert
I was just taking a look at some small thread forming taps I picked up for a job, the shanks are measuring odd diameters. The 6-32 measures.139" will a 5/32 collet lock that up?
2008 Haas VF2D
OneCNC XR5 Mill Expert
Here are 2 links,and no you can't change a tool like a collet.
MSC Item Detail
MSC Item Detail
Just push the button,what's the worst that could happen.
Thanks
2008 Haas VF2D
OneCNC XR5 Mill Expert