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Author Topic: Improving The Kadet  (Read 12806 times)

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Offline 75Plus

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Re: Improving The Kadet
« Reply #15 on: October 01, 2013, 09:16:32 AM »
The plug is a tight press fit, done in an arbor press. Fitting the plug is what necessitates removal of the barrel from the fixture. There is zero chance of the plug rotating.

Joe
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“Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth.”
George Washington

"A gun is like a parachute.  If you need one, and don't have one, you'll probably never need one again."

Offline 1SOW

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Re: Improving The Kadet
« Reply #16 on: October 01, 2013, 06:02:34 PM »
Even those just fairly tight solid pins on the75  hammers take a BIG hammer and quality starter punch just to budge 'them'.  A fitted arbor pressed filler pin isn't going anywhere.
Even the pressed-on  bearings on car alternators cannot be moved without an arbor puller---I found out the hard way years ago. :-[ ;)
« Last Edit: October 01, 2013, 07:37:09 PM by 1SOW »
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Offline Bishop112

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Re: Improving The Kadet
« Reply #17 on: October 01, 2013, 11:24:01 PM »
What would be the best material to make a new Extended firing pin out of? and what additional length should I look for on each side? Right now the hardest stuff I have on had is some stainless but I dont think this would be that great for a firing pin.... should I buy some s-7?
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Offline 75Plus

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Re: Improving The Kadet
« Reply #18 on: October 02, 2013, 10:04:40 AM »
Quote from: Bishop112 on October 01, 2013, 11:24:01 PM
What would be the best material to make a new Extended firing pin out of? and what additional length should I look for on each side? Right now the hardest stuff I have on had is some stainless but I dont think this would be that great for a firing pin.... should I buy some s-7?

At the beginning of the journey to find a better firing pin I considered the machinability of the material. I had some 303 stainless so I went with it. Stainless will suffice while in the development stage. Once a functional design is found a more suitable material can be chosen. I have some S-7 just waiting for the "Holy Grail" to be found.

Joe
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“Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth.”
George Washington

"A gun is like a parachute.  If you need one, and don't have one, you'll probably never need one again."

Offline Bishop112

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Re: Improving The Kadet
« Reply #19 on: October 02, 2013, 10:51:55 AM »
how does the extended firing pin work for ya? any better?
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Offline 75Plus

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Re: Improving The Kadet
« Reply #20 on: October 02, 2013, 02:04:32 PM »
Quote from: Bishop112 on October 02, 2013, 10:51:55 AM
how does the extended firing pin work for ya? any better?

I have seen some improvement but still not 100% which is what I am after. I think the profile of the tip may be a part of the solution. You can only vary it a couple of times before you need a new pin to experiment on. (The reason for free the machining material.)

A note of caution, the amount of extension is governed by the face of the chamber. If the new FP is too long it can, and will, peen that face when dry firing. Ask me how I know.

Joe
« Last Edit: October 02, 2013, 02:21:23 PM by 75Plus »
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“Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth.”
George Washington

"A gun is like a parachute.  If you need one, and don't have one, you'll probably never need one again."

Offline JonNC

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Re: Improving The Kadet
« Reply #21 on: October 02, 2013, 03:38:21 PM »
Joe,

I still have that extended FP that you sent me on the bench, I just haven't had any spare time to finish it up and test it (I need to make a jig to keep the pin in the proper orientation for machining the chisel point first).

I plan to use it's dimensions to also make up a few lightened versions for additional testing.
I'm also going to try to find some lighter springs as well.

If we can get the Kadet to 100% reliability with a 13# hammer spring, it would make a lot of people happy!

Wish me luck!

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Offline CoGT3

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Re: Improving The Kadet
« Reply #22 on: October 02, 2013, 04:11:27 PM »

Quote from: JonNC on October 02, 2013, 03:38:21 PM
Joe,

If we can get the Kadet to 100% reliability with a 13# hammer spring, it would make a lot of people happy!

Wish me luck!

Understatement of the year.  No reason to convert my 75 shadow to SAO.  Always felt bad about throwing all of Stuart's hard work on the DA away with SAO. 
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Offline painter

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Re: Improving The Kadet
« Reply #23 on: October 02, 2013, 05:13:02 PM »
Has a lighter firing pin spring been considered as part of the solution?

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Offline Joe L

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Re: Improving The Kadet
« Reply #24 on: October 03, 2013, 07:27:37 AM »
Without a firing pin safety block, one must be careful not to go too light with the firing pin spring.  A little lighter might not hurt. 

Joe
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Offline painter

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Re: Improving The Kadet
« Reply #25 on: October 03, 2013, 07:39:20 AM »
Can't disagree Joe.

The Kadet is a range gun after all. It couldn't hurt.
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Offline 75Plus

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Re: Improving The Kadet
« Reply #26 on: October 03, 2013, 09:26:53 AM »
Kadets have been known to drop the FP keeper resulting in loss of FP and spring. A lighter spring may help this failure. In several cases of this that I have heard of the FP cavity had quite a bit of powder residue fouling it and slowing the return of the FP after firing.

So, that said, if you opt for a lighter spring, make sure you keep the cavity clean. Not doing so could result in a 3 item parts order!!!

Joe
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“Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth.”
George Washington

"A gun is like a parachute.  If you need one, and don't have one, you'll probably never need one again."

Offline painter

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Re: Improving The Kadet
« Reply #27 on: October 03, 2013, 09:50:18 AM »
I guess that's a good reason not to do it.

Thanks Joe.
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Offline 75Plus

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Re: Improving The Kadet
« Reply #28 on: October 03, 2013, 01:46:41 PM »
For those who may be contemplating trying their hand at making an extended firing pin I made this sketch.



I made a tool to measure the distance from the chamber face to the shoulder in the pin cavity that stops the forward motion. The 2.038" noted in the sketch is the absolute max allowable.

The factory FP measures 2.022" so an extension of .015" is possible. Some have mentioned shortening the length of the max diameter portion to allow more FP travel. Just be aware that more than .015" removed from the tip side will get close to the peening region. Removing material from the hammer side will allow the hammer to contact the FP earlier and push it further but the tip starts further from the primer so that may be a wash. I have been trying different tip profiles with some success but no "Break Thru's."  Still looking.

Joe
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“Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth.”
George Washington

"A gun is like a parachute.  If you need one, and don't have one, you'll probably never need one again."

Offline 1SOW

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Re: Improving The Kadet
« Reply #29 on: October 03, 2013, 07:38:10 PM »
Joe, I've shot .22 pistol for quite some time, and NOT DRY FIRING is a standard rule.  Many name brands will peen when not inserting a case or a snap-cap before dry-firing.  I used spent cases with dowell inserts for bullets back in the day with my High Standard..
If shooters know beforehand, why the concern  IF it will improve the strike with a lighter spring?
"Warning,  Dry-Fire without Snap-Caps Can Cause Damage to Your Pistol".


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