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All Springer/NP/PCP Air Gun Discussion General > Show Off Your Air Guns With Mods (SHOW and TELL)

45 caliber Big Bird Big Bore Build

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MJP:
Be sure to vent the tube in front of the hammer or you will loose alot of hammer energy for moving air in front of the hammer.

Marko

BigBird:

--- Quote from: JuryRigger on December 29, 2021, 11:09:37 AM ---The old handbooks all extol the virtues of HSS as being that it will retain most of it's hardness even after being heated to a red heat for a short time... A lot more extreme than just drawing it to a blue color; I've sharpened up badly abused drills that had the ends melted-only ground them far enough back to get good flutes; and they cut just fine (and no; I didn't melt them  :D)...
Only thing to watch when cutting drills down, is that (on most of the ones I've dealt with, anyhow) the web gets thicker further up the drill; which will make for a useless bit at a certain point (IME this only really shows when you're down to the last 1" or so of flutes)...
Jesse

--- End quote ---

Interesting.  I am still learning  heat treating.  I've learned that my toaster oven heats stuff up too quickly.  Things that should be straw quickly went to blue or grey before I could pull it out.  I am going to try to heat treat the hammer at some point using casenite.  Any advice on that would be great.  I only have a map gas torch.

BigBird:

--- Quote from: MJP on December 29, 2021, 04:29:11 PM ---Be sure to vent the tube in front of the hammer or you will loose alot of hammer energy for moving air in front of the hammer.

Marko

--- End quote ---

Yes.  I was thinking either that or making a groove on the hammer that will let air by and for the front trigger screw.

JuryRigger:

--- Quote from: BigBird on December 29, 2021, 04:39:31 PM ---

Interesting.  I am still learning  heat treating.  I've learned that my toaster oven heats stuff up too quickly.  Things that should be straw quickly went to blue or grey before I could pull it out.  I am going to try to heat treat the hammer at some point using casenite.  Any advice on that would be great.  I only have a map gas torch.

--- End quote ---
No experience there; afraid that I can't help...
Jesse

Rob M:
is that 10.7 ounce hammer ?? sweet

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