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General discussion => Gun Building => Topic started by: correntinos on May 20, 2019, 11:52:41 PM

Title: drilling , reaming and lapping??? for a new barrel
Post by: correntinos on May 20, 2019, 11:52:41 PM

other newie question , reaming and lather lapping or only reaming??? is for a smooth bore  barrel .

thanks again from argentina

Title: Re: drilling , reaming and lapping???
Post by: G_T on May 21, 2019, 12:53:22 AM

Is the bore in good condition, and already smooth? What are you trying to correct?

Gerald

Title: Re: drilling , reaming and lapping???
Post by: Daryl on May 21, 2019, 12:59:39 AM

Yes - what is YOUR purpose? Is it pitted and/or have boring marks?

Title: Re: drilling , reaming and lapping???
Post by: correntinos on May 21, 2019, 01:34:21 AM

is for a new barrel excuse me I dont write this  past in the first post

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: Dphariss on May 21, 2019, 03:03:48 AM

Quote from: correntinos on May 20, 2019, 11:52:41 PM

other newie question , reaming and lather lapping or only reaming??? is for a smooth bore  barrel .

thanks again from argentina

I would drill, ream and then use an expandable barrel lap the smooth and polish it.

Dan

https://www.travers.com/brass-barrel-blind-hole-laps/p/112470/

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: Dphariss on May 21, 2019, 03:04:34 AM

Quote from: Dphariss on May 21, 2019, 03:03:48 AM

Quote from: correntinos on May 20, 2019, 11:52:41 PM

other newie question , reaming and lather lapping or only reaming??? is for a smooth bore  barrel .

thanks again from argentina

I would drill, ream and then use an expandable barrel lap the smooth and polish it.

Dan

https://www.travers.com/brass-barrel-blind-hole-laps/p/112470/

Using a rod by hand not in a machine.

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: correntinos on May 21, 2019, 04:35:26 AM

great dear Dpharis which abrasive do you use whit the rod ????

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: Bob Roller on May 21, 2019, 03:15:38 PM

Quote from: correntinos on May 21, 2019, 04:35:26 AM

great dear Dpharis which abrasive do you use whit the rod ????

I have seen everything used for lapping from Colgate tooth paste to coarse valve
grinding compound used in valve repairs on car engines.

Bob Roller

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: correntinos on May 21, 2019, 04:57:34 PM

Thanks a lot Bob

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: HelmutKutz on May 29, 2019, 04:47:33 PM

If the reaming is done correctly, there is no need to lap or polish a smooth bore. If it is to be used for round ball, it will be best to not polish or lap unless there is a problem as making the surface too smooth creates problems. If the bore is to be used with unprotected bird shot pellets, polishing should not be done on the 3cm closest to muzzle.
HK

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: T*O*F on May 29, 2019, 07:46:09 PM

Quote

is for a new barrel excuse me I dont write this  past in the first post

This is confusing.  Have you already purchased a new barrel or are you making your own barrel from a piece of round stock?
If you purchased a new barrel, then none of this applies, as it has already been done.
If you are making your own barrel, then it all applies.

Which is it?

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: Dphariss on May 29, 2019, 09:27:54 PM

Quote from: correntinos on May 21, 2019, 04:35:26 AM

great dear Dpharis which abrasive do you use whit the rod ????

I would try 220 grit to start then go to 320 and 600 depending on how it looks.
If a hand turned square bit is used then lapping may not be needed.
Dan

Title: Re: drilling , reaming and lapping??? for a new barrel
Post by: correntinos on May 30, 2019, 01:04:30 AM

thanks a lot of alls friends