Having an issue I’ve not ran into before. Been chambering a 6.5 PRC for a customer and after I make each cut I stop the lathe and go to pull the tailstock back along with the floating reamer holder and reamer but it won’t come out unless I reverse the wheel right as the lathe chuck is about to stop. I don’t have a flush system nor do I pre bore. I’ve only done a handful of barrels but haven’t ran into this before. I was taught never to pull the reamer out with the barrel spinning. The gunsmith that trained me does it this same way and doesn’t have any idea unless it’s an issue with the reamer itself. I tried removing the pilot and going back in to see if the pilot was causing it but it still does the same thing. Any ideas?
Reamer sticking in chamber
- Thread starter JASON50CAL
- Start date
B Nettesheim
Gold $$ Contributor
Sounds like you’re making a chamber the same size as the reamer
If the reamer is loading up with chips it can be hard to get it out. How much are you advancing? I go 0.100 3 or 4 times, Then 0.050 till I get close to the neck length, Then advance 0.025 for the length of the neck to avoid cutting a ring in the neck.
I don't have a flush system either, Being a Hobbyist, I Don't do enough chambers a year for me to justify it.
I don't have a flush system either, Being a Hobbyist, I Don't do enough chambers a year for me to justify it.
Also it’s a brand new PT&G reamer
That may be your problem, Some times too sharp causes issues. Run a penny down the edge of the flutes, Brand new reamers, Especially Short Magnums can be finicky.
I go in .100 first couple of times. .050 after that until I get close usually but even if I take less than .025 it still sticks
Ok. I did try running some copper down the edge to check for any chips stuck to it
You have to somewhat dig the penny in slightly. What oil are you using?
Vipers Venom
Is it cutting chips? Not feeding in enough will work harden the barrel and dull the reamer.
It seems to be cutting good and chamber looks good with my borescope. I’m about to.075 short of finishing the chamber and afraid of putting a ring in it by having to back off on the hand wheel right as the chuck stops to get it out
DR_2297
Silver $$ Contributor
I always relieve tool pressure prior to stopping the spindle. Maybe 10 thou on the hand wheel. Haven’t ever had an issue with any chips over riding the flute. Only time I have ever had retraction issues is if the bushing is too large or there is a bind.
I also let the tool tell me when to stop feeding. If it is clearing chips and not taking any force to really drive it then I keep on cutting. I am pumping low pressure oil from the muzzle so everything is staying lubricated - it isn’t enough to really force chips / swarf out of the flutes though.
I also let the tool tell me when to stop feeding. If it is clearing chips and not taking any force to really drive it then I keep on cutting. I am pumping low pressure oil from the muzzle so everything is staying lubricated - it isn’t enough to really force chips / swarf out of the flutes though.
I know the bushing is not binding. I tried it with the bushing removed. What else could be binding?
Are you using a pusher or a floating reamer holder? A Ptg reamer from the last few years I wouldn't trust either.
DShortt
Gold $$ Contributor
That's ^^^^ what I've always done. Never had a problem but it takes me a LONG time to chamber a barrel.
That's fine. I wait until I'm in the mood and have more time than I think I'll ever need. But.I just do my own work.
Reversing the chuck is a big no-no, so I was told early on. I've never done that.
That's fine. I wait until I'm in the mood and have more time than I think I'll ever need. But.I just do my own work.
Reversing the chuck is a big no-no, so I was told early on. I've never done that.
When using a pusher, I am holding it with a 10 inch piece of pvc with my hand between it and the compound, When I am done advancing, I pull the pvc off with the Machine still running, Then shut it off and grip the pusher and turn it clockwise by hand breaking the chip off.
It's the Richard Franklin Technique, I've done a lot of chambers that way.
It's the Richard Franklin Technique, I've done a lot of chambers that way.
Floating reamer holder. Yeah I know but the customer supplied it
I don’t think it’s dug in. I stop my cut and let the lathe run for a few seconds before turning it off. It still gets stuck so what I’ve been doing is turning off the lathe and at the same time holding back on my floating reamer holder and bumping the hand wheel back right before the lathe stops turning. Then it will pull out easily
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