Chambering ?

H

Hal

New member
1. Does the phone always ring when your just starting to do a chamber? :)

2. Do all the flutes on a reamer cut evenly?

3. How fast do you feed the reamer in ? Should you get little shavings or long continuous thin ribbons.

4. When using air to clean the reamer, has anyone had shavings get under the pilot bushing?

Thanks
Hal
 
1. Sometimes. When it does, I ignore it.

2. No

3. Carbide Roughing Reamer @ 420 RPM / Finishing Reamer @ 240 RPM / Chamber Flush System a must
Feed by hand with the tail stock, Chips vary depending on the blank. Mostly, rinkled looking chips though.

4. Yes, when I started. Get them out so the pilot doesnt stick and mark up the bore.
 
  1. No landline phone in shop. Turn cell phone off. Radio off.
  2. Not very often.
  3. I feed for constant torque, I'm restraining it with my hand. I let go and back off the tail stock at the same time when I see the first chip exiting the breech, turn off the spindle, remove the reamer for cleaning after the spindle has stopped to eliminate chance for a chip to get under a flute as the reamer is coming out which might cause galling on chamber wall.
  4. Not often. I dip the reamer into kerosene and swizzel it around to wash off the chips, then blow it dry before dipping it in the cutting oil.
Fitch
 
Everyone thanks for the help.

Cleaning the reamer in Kerosene sounds like a good idea.
I'll have to try stopping the spindle before retracting the reamer.
Right now I'm chambering a long cartridge, a .257 Wthby, and if I wait until the chips exit the breech, the chips are fairly dry. Is that taking to deep of cut without reoiling the reamer? (I can see where the pressure oil systerm would be nice)

Hal
 
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Hal said:
Everyone thanks for the help.

Cleaning the reamer in Kerosene sounds like a good idea.
I'll have to try stopping the spindle before retracting the reamer.
Right now I'm chambering a long cartiage, a .257 Wthby, and if I wait until the chips exit the breech, the chips are fairly dry. Is that taking to deep of cut without reoiling the reamer? (I can see where the pressure oil system would be nice)

Hal
Click to expand...
A note here, as fitch says do stop the spindle, but back the pressure off the reamer before you stop the spindle and withdraw the reamer.

One more thing, as to using compressed air in the machine shop. Do not use it on your machines nor to clean the machines otherwise you can blow chips under the way wipers, and AGHHHH!
 
JerrySharrett said:
A note here, as fitch says do stop the spindle, but back the pressure off the reamer before you stop the spindle and withdraw the reamer.

One more thing, as to using compressed air in the machine shop. Do not use it on your machines nor to clean the machines otherwise you can blow chips under the way wipers, and AGHHHH!
Click to expand...
\

Definitely do what Jerry says. I may not have been clear. I let go of the reamer, it starts to turn with the spindle, releave pressure by backing off the tail stock quill a fraction of a second later, then turn off the spindle, let it come to a stop while I move the tail stock out of the way, then remove the reamer.

I also park the carriage so it acts as a stop for the tail stock (tail stock is moved forward into contact with carriage and locked before quill is moved forward to push reamer). That way the dial indicator I have setup to monitor tail stock quill movement will repeat for engagement right on the same line where I stopped. Makes hitting the final depth within +/- a couple tenths no problem.

I use a home made floating reamer pusher, the design of which I shamlessly stole from another regular here. I made it in a couple of fun hours at the lathe. It works "really" well.

ReamerPusher-2RS.jpg


Jerry (and a lot of others) know all this, but I'll repeat it for any new folks.

Fitch
 
Mike Bryant said:
So, that you don't get a chip between a flute and chamber wall which could score the chamber.
Click to expand...

Exactly.

Fitch

PS: It was Mike's floating reamer pusher I copied.

frw
 
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if one pre taper bores, and leaves off the pilot bushing...chips have no place to get caught....

mike in co
 
Mike

I didn't pre bore on this chambering job. But I can see the advantages of pre taper boring.

Fitch
That is a nice looking reamer handle .

Again Thanks for the help.

Hal
 
mike in co said:
if one pre taper bores, and leaves off the pilot bushing...chips have no place to get caught....

mike in co
Click to expand...

With all due respect, I disagree. The if the reamer is tapered at all clearance that can trap a chip will develop as it's withdrawn. Taper preboring doesn't matter. As you with draw it from even an almost completed chamber, if the barrel is still rotating a chip can slip under the reamer and gall if any return or side pressure is put on the reamer.

Fitch
 
we were discussing getting caught in the pilot bushing.....when cleaning....(see number 4 on his original list)

mike in co
frwillia said:
With all due respect, I disagree. The if the reamer is tapered at all clearance that can trap a chip will develop as it's withdrawn. Taper preboring doesn't matter. As you with draw it from even an almost completed chamber, if the barrel is still rotating a chip can slip under the reamer and gall if any return or side pressure is put on the reamer.

Fitch
Click to expand...
 
C'mon mike, get the peanut butter out...... I asked a question (post #7 in your parlance) and they answered it.

nobody died and made you the post police.

al
 
i do not disagree with fitch...my comment was ..as i have pointed out...number four on the posters original question.....
i do cheese and crackers with whine.....
i was not attempting to police anything...just pointed out what my post was about since it got misconstrued...or something like that...

mike in co
 
1. A phone does not have a constitutional right to be answered.
2. No
3. I hand ream after pre-boring, with compound set on correct taper. All the reamer does is establish the final shape and finish of the chamber. I Ieave about .005 for the finish.
4. Each time I take the reamer out, I make sure there is nothing on it but cutting oil before I re-insert it.
........jackie
 
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jackie schmidt said:
1. A phone does not have a constitutional right to be answered.
2. No
3. I hand ream after pre-boring, with compound set on correct taper. All the reamer does is establish the final shape and finish of the chamber. I Ieave about .005 for the finish.
4. Each time I take the reamer out, I make sure there is nothing on it but cutting oil before I re-insert it.
........jackie
Click to expand...

Jackie, you have opened a can of worms here. anti-gun people monitor this forum, and now that you have raised the issue of inanimate objects and their lack of constitutional rights...i mean, do i have to spell it out?
 
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