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breech biock hole (Read 6152 times)

Chuckster Frequent Elocutionist Offline Posts: 2229 Location: Colorado Joined: May 15^th, 2008	Re: breech biock hole Reply #30 - Sep 26^th, 2023 at 11:17pm	Print Post
	This technique may be older, but believe Harry Eales was the first to use it for a breech block recess. Always called it the "Harry Eales Method". Rest in peace, Harry. You are still missed. Chuck


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gwahir Senior Forum Member Offline Ve gets too soon olt und too late shmart. Posts: 414 Location: montana Joined: Dec 31^st, 2005	Re: breech biock hole Reply #31 - Sep 26^th, 2023 at 11:38pm	Print Post
	Would love to read about it!


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gwahir Senior Forum Member Offline Ve gets too soon olt und too late shmart. Posts: 414 Location: montana Joined: Dec 31^st, 2005	Re: breech biock hole Reply #32 - Sep 29^th, 2023 at 8:26am	Print Post
	I wanted a better finish inside the breech block hole and also decided to make the narrow part wider; from .50" to .60". Here is the new block on the left and the recut, larger hole, in the receiver. The greater width allowed me to cut the sides of the hole with my current setup and finish it up nicely. (You need to *Login* or *Register* to view media files and links) Here is the new block in place. Some times the learning curve gets steep! (You need to *Login* or *Register* to view media files and links) The contact surfaces between the block and the receiver are as close to mating as I can cut them. I expect they will require a bit of scraping. There is no contact at the rear of the block, just on the recoil surfaces on the side.
	« Last Edit: Sep 29^th, 2023 at 8:39am by gwahir »

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idjeffp Senior Forum Member Offline Posts: 302 Location: Boise, ID Joined: Nov 11^th, 2017	Re: breech biock hole Reply #33 - Oct 7^th, 2023 at 6:24pm	Print Post
	Nice work gwahir - looks good!


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chipmaker Senior Forum Member Offline Posts: 338 Location: san diego Joined: Sep 24^th, 2007	Re: breech biock hole Reply #34 - Oct 13^th, 2023 at 11:57am	Print Post
	I worked with a retired aerospace machinist a number of years ago building a Martini from bar stock. He had an Italian made attachment that attached to the quill of his Bridgeport milling machine and converted it into a vertical shaper. It was a large heavy attachment and unfortunately I don't know the manufactures name. Chuck has passed away and I now use a shaper cutter in a milling cutter holder, to manually square up the corners of holes. Otto


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gwahir Senior Forum Member Offline Ve gets too soon olt und too late shmart. Posts: 414 Location: montana Joined: Dec 31^st, 2005	Re: breech biock hole Reply #35 - Oct 13^th, 2023 at 11:01pm	Print Post
	Yuh. Being able to make an acceptable square hole opens up a whole bunch of possibilities! When using this process, keep one eye on quill alignment. It can move under pressure, and we don't want that!
	« Last Edit: Oct 16^th, 2023 at 2:12pm by gwahir »

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LRF Oldtimer Offline Posts: 579 Location: MN Joined: May 8^th, 2010	Re: breech biock hole Reply #36 - Dec 23^rd, 2023 at 8:12am	Print Post
	gwahir, your project is looking good. nicely done. singleshotsam wrote on Sep 19^th, 2023 at 8:58am: 50 years ago when just starting my career in a mold shop and before we had our first tube type Elox EDM I used a Bridgeport Quillmaster to cut square pockets in the mill. A single flute cutter ground at a 90 degree and the Quillmaster set at 45 degrees did a slow but decent job to remove the radius from the corners of a pocket. I was curious and did a search, quite a bit of information on the internet. Boy this brings back a lot of memories. I remember the old Elox EDM's well. Loved it when we replaced it with a Charmilles EDM. And I have cut out the corners of a mold cavity with a Quillmaster. In my home shop I had both a Bridgeport Shaping Attachment and a die filer machine. Was glad when I got rid of them. When the die filer left my finger tips thanked me. (Pincher hell) The very best way I found to make BB square hole was with a wire EDM, but I realize not a resource available to everyone. Chuckster, been a while since I heard the name of Harry Eales. I sure do miss him. Always wished I had gone to England to see him. RIP


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rgchristensen Frequent Elocutionist Offline Posts: 1088 Joined: Jan 2^nd, 2014	Re: breech biock hole Reply #37 - Dec 24^th, 2023 at 2:58pm	Print Post
	Harry Eales ... Yes, a long time. CHRIS


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LRF Oldtimer Offline Posts: 579 Location: MN Joined: May 8^th, 2010	Re: breech biock hole Reply #38 - Feb 24^th, 2024 at 6:31am	Print Post
	rgchristensen wrote on Dec 24^th, 2023 at 2:58pm: Harry Eales ... Yes, a long time. CHRIS Wonder what ever happened to the Borchardt he was building.


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gwahir Senior Forum Member Offline Ve gets too soon olt und too late shmart. Posts: 414 Location: montana Joined: Dec 31^st, 2005	Re: breech biock hole Reply #39 - Jul 12^th, 2024 at 9:49am	Print Post
	Since getting this process more or less figured out and using it on three actions, I add comments.. Prior to doing anything else with it, really square up the block of steel to be used for the action! It will do a lot of alignment for you. Use a stop in the milling machine vice for removing and replacing the work accurately. Remove as much metal as possible with end mills. A 1/4" carbide plunge cut really works well for me and with some dinking I leave very little metal to be removed with the scraping process. Do the hole from the top, to the extent of the end mill. Then flip the steel over in the vice and repeat the process from the bottom of the block. Unplug the milling machine for the scraping process. If you do not, your reflexes will reach out to the power switch...
	« Last Edit: Jul 13^th, 2024 at 11:39pm by gwahir »

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moodyholler Oldtimer Offline Posts: 697 Location: Blue Ridge Joined: Oct 11^th, 2005	Re: breech biock hole Reply #40 - Sep 10^th, 2024 at 8:38pm	Print Post
	I worked in a tool and die shop with two Mitsubishi wire machines, one Charmille wire machine, and 3 EDM down burners. Hungry tool and die makers would do projects anytime. I was a Designer and we traded work. Good old days. They have most mold built in China now. Down to 3 guys to do repair work. Sad state. moodyholler


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singleshotsam Oldtimer Offline Posts: 555 Location: Silver City NM Joined: Jan 15^th, 2009	Re: breech biock hole Reply #41 - Sep 20^th, 2024 at 10:32pm	Print Post
	When I moved to Phoenix in 1990 there were 27 mold shops in the valley. When I left in 2006 there were only 7 left. Most of the molds we built back then were shipped off shore for production, Mexico, India and Ireland were the most common destinations. Not much made in the USA anymore.


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.22-5-40 Oldtimer Offline Posts: 796 Joined: Feb 13^th, 2010	Re: breech biock hole Reply #42 - Sep 21^st, 2024 at 10:01am	Print Post
	Interesting stuff! Has anyone tried to manufacture a falling block action with a rounded breech block..like the original Sharps pistol carbines? seems like it would be alot easier..and with the full radius no fear of stress risers.


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