End OD deburring or Taper Cutter

[JPSAXNC]

I've had good luck using adjustable dies, and just squaring off the end to be threaded, no taper. I start by adjusting the die all the way open, take a pass test the fit and back the die off till the fit is right. As long as the diameter of the part is the right size to thread with a die it works fine hth.

[eeler1]

Might be best to just cut the nub off, drill and tap for desired thread and insert a threaded stud. If the part is one piece, it appears to be some cast mystery metal and a stud insert would be stronger.

Dave

+1

[Ronno6]

Might be best to just cut the nub off, drill and tap for desired thread and insert a threaded stud. If the part is one piece, it appears to be some cast mystery metal and a stud insert would be stronger.

Dave

+1

The plastic bolt carrier body has mayme 3'32" thickness of plastic on C/L with the probe til it breaks thru to the hammer pin slot.
That's pretty much the weak spot in these bolts.
If I left an appropriate length of probe, then drill and tap for a stud, I would be mating a .22 probe to a .177 stub....
That would look funky...
I personally would not want to purchase that..........
I guess I could drill a clearence hole in the mating end of the brass .22 probe, then drill and tap a stud hole at the bottom of that pocket........
Much easier (and stronger, I would bet) to thread the nub of the .177 probe and drill and tap a mating hole in the end of the .22 probe...
Maybe I could just drill a press-fit hole in the end of the .22 brass probe and press together?

I DO thank you for the recommendation, tho........

[rsterne]

I have seen some Dremel stones with a cone shaped hole in the end.... They are about 3/8" OD, IIRC....

Bob

[Ronno6]

I have seen some Dremel stones with a cone shaped hole in the end.... They are about 3/8" OD, IIRC....

Bob

I have looked for those but not as yet found them........

[OTmachine]

Could you chuck up a boring head with a small boring with an angle grind on it to cut the chamfer.  Or just grind and angle on a 1/2” shank boring bar to directly chuck up and chamfer the O.D.  Kinda like a skiiving tool.

[Ronno6]

Realistically though, you could probably center drill a piece of 3/8” stock, then using a hacksaw, cut several slots across the end and you would have what you need. After all, it’s only plastic and the tool wouldn’t even need hardening (unless you were doing a lot).
Dave

I used a piece of 1/2" CRS
Center drilled a 1/8" opening up to 1/4" hole
2 cross saw cuts...
Chucked it up and it works like a charm!

Slid my die holder over the chamfer tool and threaded the nub.

WONDERFUL !

Thanks,Mr.Dave !!

[sb327]

Glad it worked!

Dave

[Ronno6]

In addition to the end chamfer I have goge to a coarser thread.
The fine thread was prone to cross-threading of the brass probe onto the plastic base.
Much easier now!