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Very Hot Topic (More than 25 Replies) Sharps Pistol Rifle Build (Read 38433 times)
calledflyer
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #60 - Oct 31st, 2022 at 9:50am
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thank you, Bob, this one is really interestin', and may I say, your photos are so well done that a machinist dolt such as myself could see what is going on here. I might be tempted to think I could do it myself. Roll Eyes
GT, your ''miniscule'' projects are always as intriguing as your bigger works. I hope the both of you continue to share this stuff with us for a long while to come. Happy Halloween to all.
  
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bobw
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #61 - Oct 31st, 2022 at 11:58am
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Greg, 
My wife always said my work got in the way of my hobby!  I think you have the same problem.  It is nice having the time for these projects now days.
Bob
  

Robert Warren
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #62 - Nov 2nd, 2022 at 10:53pm
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Got going on the lever the last couple days.  Had to redo the numbers on my drawing somewhat because of some dimensional changes I made in the frame and breech block area.  That took most of an afternoon to correct and verify before starting to machine steel.

This first photo is how the lever started.  The thicker step will mostly be machined away but is needed because a portion will be left to activate the extractor.

The blank I used ended not being quite wide enough to catch the end of the lever.  It should have been, but because I change the layout on the blank it wouldn't fit.  So I ended up making the back portion straight and bent it into the shape I wanted.  Was going to use heat but I don't have anything that will get this much steel hot enough so ended up cold forging it.  This second picture shows the roughed out lever.

After some clean up the lever looks much better in this third picture.  But, is still way too heavy looking and will be thinned up  when I finish the outside of the lever.

In this fourth photo the inside is getting really close to finished size.  Just needs some fine tuning of the shape yet.  The outside will be left until the gun is more functional and I know the lever will work.  

This fifth picture now has the breech block in place and shows the step is mostly gone at the front.  The portion of the step that is left, is around the pivot pin.  There is a pretty good lump above and in front of the pivot pin.  There will be a spring to help hold the lever closed, and hopefully position the breech block in the proper place for loading the gun when open, but after extraction.  What I'm wanting is to open the lever until the cartridge is extracted and then the spring will push or raise the block to the loading position...hope that makes sense!  Anyway, this lump or cam will be what the spring will act on to make this stuff happen.....I hope!
Bob
  

Robert Warren
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bobw
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #63 - Nov 2nd, 2022 at 11:10pm
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The lever needs fitting to the frame and breech block to work properly.  The first part I did was making sure it closed all the way when hooked to the breech block.  Secondly, the open position was adjusted.  This is all done by removing metal here and there until everything works.

The last photo in the previous post shows the closed portion of the fitting completed.  The first here shows the open position complete.

The last two pictures are of slightly different angles showing the breech block and lever hook up and fitting.
Bob
  

Robert Warren
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #64 - Nov 8th, 2022 at 7:26pm
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Started on the extractor in this first picture.  Machining was done on the rotary table.  Didn't notice the broken tooth on end mill until I was done.

Thinning down the shell end of the extractor in the third picture.  With the broken end mill still being used!

And the last one is the rough finished extractor.
Bob
« Last Edit: Nov 8th, 2022 at 8:03pm by bobw »  

Robert Warren
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #65 - Nov 8th, 2022 at 7:49pm
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In the first picture the extractor is in its final position in the frame, but the frame needs the slot cut before I can get it fitted to the barrel.  I just ordered the barrel from CPA on Friday, so it will be a few days before I get back to this gun.

A friend gave me 250 pounds of sheet lead so I melted it all down yesterday and poured in molds.  The same friend loaned me his large lead pot and burner which really made things go quickly, 4 hours start to finish.  Probably more lead than I will ever need but couldn't turn it down.

The second photo shows the extractor against the lever as it will be in the gun.  Notice the part of the lever that wraps around the extractor.  When the lever is opened all the way this will trip the extractor.  The wrap will be shortened up as the extractor is fitted and timed with the lever.  I got the idea for this extractor from the Stevens 44 1/2 and its 6 o'clock position.  This one will not be at 6 o'clock, but the activation is still very similar.

The last picture is just another view of the two pieces.
  

Robert Warren
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Chuckster
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #66 - Nov 11th, 2022 at 12:00pm
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Don't know if people appreciate the drawings and layouts Bob uses as background for the photos.
Suspect he spends more time on those drawings than machining parts.
Don't believe most people can build an action from stock without some drafting skills.
Have read that John Browning could visualize parts and make them without a drawing or sketch.
Chuck 
  
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #67 - Nov 11th, 2022 at 4:31pm
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The Russian who designed the margolin range of target pistols was blind, he would describe the part to the machinists and they would make it, he would then feel the part to see if it needed changes. Having said that I need detailed drawings and then I can build things if they are even slightly out of the ordinary. Bobw drawings are pretty good from what I can see of them.
Gumpy
  
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #68 - Nov 11th, 2022 at 6:32pm
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While I was working I have had engineers bring me sketches on everything from drafting paper to the funny pages out of the newspaper. Don't matter what it is written on as long as it is legible and understandable.


JMH
  
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #69 - Nov 12th, 2022 at 12:26pm
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I can usually visualize a part I want to make, but there is no way I could make it without some sort of drawing.  I draw most everything, even the wood parts and don’t do any working of wood or metal until I’m comfortable with the drawing.  Chuck is correct, I spend lots of time drawing and do enjoy doing it, they work for me even though I realize they wouldn’t cut it in a real machine shop environment.  I like working from a copy making corrections on it as I work.  I normally find things need to be changed slightly while machining from what the drawing is, and also don’t note +- clearances, that’s done as parts are made.  Any changes on the copy are “usually” corrected on the original drawings.  Another nice thing about the drawing is I note what steel was used for each part.  That way I know anytime in the future what was used without any doubt.
Bob
Bob
  

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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #70 - Nov 12th, 2022 at 9:28pm
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Grumpy gumpy wrote on Nov 11th, 2022 at 4:31pm:
The Russian who designed the margolin range of target pistols was blind, he would describe the part to the machinists and they would make it, he would then feel the part to see if it needed changes. Having said that I need detailed drawings and then I can build things if they are even slightly out of the ordinary. Bobw drawings are pretty good from what I can see of them.
Gumpy


He does, however, have issues with timber from time to time (Gumpy that is not bobw)
Grin
  
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bobw
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #71 - Nov 16th, 2022 at 6:54pm
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Been working on the barrel.  I buy barrel blanks so they need profiling and polishing before anything else.  The first photo shows it done as far as I will take it for now.  I don't like polishing in the lathe, but that's what I have so I use it.  I cover and clean it when done.

Once profiled and polished I started working on the breech end features and threading.  The second and third photo show my setup for getting located on the center of the bore.  Luckily I have gage pins that run 1/10 of a thousandths each.  This is a Douglas barrel, I don't know if its intentional but the bore chokes down by a tenth of a thousandth.  .2508 to .2507.  I centered up on the bore and cut the lump from the end of the barrel that was left from profiling, then shortened the breach end a small amount.  After that was done I rechecked the the setup before turning the different features.  And, I rechecked again before threading.  I know its over kill but I just like to be sure everything is staying true to the bore.  I think the brass protectors give a little because I usually need to make small corrections.

The threading is complete in picture 4.

Photo 5 shows the barrel threaded to the receiver but there is still a gap showing between the receiver and barrel.  There is a decorative spacer that fills this area.
« Last Edit: Nov 16th, 2022 at 7:20pm by bobw »  

Robert Warren
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #72 - Nov 16th, 2022 at 7:10pm
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The first photo in this post is of making the decorative spacer.

When done making it in the lathe I threw it on the surface grinder to get the thickness I wanted and make sure the sides were parallel. Then back in the lathe on a mandrel and polished it.  The marks on the face are from installing it on the mandrel and not hurting anything.

3 is the spacer installed on the barrel shank.

The last two pictures are the barrel fully installed, setup properly to the breech block and the spacer installed.

The spacer will need some decoration which will be done the same as the grip cap and the screw that retains the cap.  These will probably need to be engraved since the grip cap is elliptical. 

Now I can work on getting the extractor installed, firing pin in place and the firing pin transfer bar made and installed.  I'll cut a chamber later.
Bob
  

Robert Warren
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #73 - Nov 18th, 2022 at 11:41pm
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He does, however, have issues with timber from time to time (Gumpy that is not bobw)
Grin [/quote]

You make one monumental cockup with measuring something and no one forgets....oh hang on, I keep telling people what I did.....damm.
Smiley

Gumpy
  
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Re: Sharps Pistol Rifle(In the attempt to build phase)
Reply #74 - Nov 29th, 2022 at 9:17pm
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As I mentioned before this original gun did not have an extractor or firing pin because it was made as a breech loading percussion in the 1850 and 60's.

So, I have a working extractor now. Photo 1 shows it fitted in the frame but still needs fitted to the barrel.

Photo 2 show the frame machined slot.

3 and 4 shows it fitted to the barrel, fully open and near fully closed.

Bob
« Last Edit: Nov 29th, 2022 at 10:20pm by bobw »  

Robert Warren
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