Martini Cadet trigger screw problem UPDATE 2
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Please post political post in the new Politics forum.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Martini Cadet trigger screw problem UPDATE 2
Well, I thought I had the major problems licked when I got the original barrel installed (finally) on the project Cadet. I was wrong.
The trigger wouldn't set when the lever was worked even though nothing appeared to be altered. Finally figured out I didn't have the trigger spring and trigger mated properly. Once I did that I found the trigger screw wouldn't screw in more than a couple of turns. I tried the screw in my other Cadet and it was a no go. Tried the known good screw in the problem child and it wouldn't go either so I figure both the screw and threads in the trigger guard are galled or otherwise damaged.
Does anyone happen to know the thread used and if it could be re-tapped or cleaned up? Is there another option if they can't be? I don't have a lathe so this is something that would have to be handled with hand tools...
Thanks!
The trigger wouldn't set when the lever was worked even though nothing appeared to be altered. Finally figured out I didn't have the trigger spring and trigger mated properly. Once I did that I found the trigger screw wouldn't screw in more than a couple of turns. I tried the screw in my other Cadet and it was a no go. Tried the known good screw in the problem child and it wouldn't go either so I figure both the screw and threads in the trigger guard are galled or otherwise damaged.
Does anyone happen to know the thread used and if it could be re-tapped or cleaned up? Is there another option if they can't be? I don't have a lathe so this is something that would have to be handled with hand tools...
Thanks!
Last edited by awp101 on Fri Mar 15, 2013 5:38 pm, edited 2 times in total.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem
I think a milling machine would be appropriate.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem
Oh boy, I love it when someone volunteers!Mescalero wrote:I think a milling machine would be appropriate.
Here's the info I got at the ASSRA forum:
Now I need to figure out my options. No budget for machine work and it's too close to being operational to stop now...I measured the Cadet trigger screw and found the thread pitch is 36 TPI. The diameter is a couple thousands larger than a No. 6 screw.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem
I have a lathe and a milling machine, they are in N.M.
I am in Phoenix.
I am in Phoenix.
Re: Martini Cadet trigger screw problem
Standard screws are available in increments of .001, .002,.003..... over and under from mean.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem
Fastenal was suggested as a source for a tap and there's a location not far from me. I may take the screw and the (empty) trigger guard in and see what they say.
Too bad your stuff is in NM but neither one of us is!
Too bad your stuff is in NM but neither one of us is!
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem
You should look into AN/AS aircraft fasteners, I think you would find what you need.
Re: Martini Cadet trigger screw problem
You could chase the thread with a triangular needle file on the screw.
KI6WZU
NRA member
"When they call the roll in the Senate, the Senators do not know whether to answer 'present' or 'not guilty.'"
--President Theodore Roosevelt (1858-1919)
“Democracy must be something more than two wolves and a sheep voting on what to have for dinner”
NRA member
"When they call the roll in the Senate, the Senators do not know whether to answer 'present' or 'not guilty.'"
--President Theodore Roosevelt (1858-1919)
“Democracy must be something more than two wolves and a sheep voting on what to have for dinner”
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem
bsa, I'm going to give that a shot this weekend!
Under high magnification I can see where the first couple of threads of the screw might be bunged. Not sure how I did that but it may have happened when I assembled the trigger and trigger spring incorrectly and the screw got cross threaded.
Under high magnification I can see where the first couple of threads of the screw might be bunged. Not sure how I did that but it may have happened when I assembled the trigger and trigger spring incorrectly and the screw got cross threaded.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-
- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE
Well, it's certainly in the trigger guard. I tried chasing the screw threads with no success so since it was just the first couple of threads on the screw I filed them down then tried again. Got to same number of turns before it locked up and the clean threads were now bad.
At least now I know for sure where the problem lies (and it's not the operator ). For the time being I've swapped the entire assembly between the two Cadets since the .310 will probably be done before the Bee.
At least now I know for sure where the problem lies (and it's not the operator ). For the time being I've swapped the entire assembly between the two Cadets since the .310 will probably be done before the Bee.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem UPDATE
Buy a tap 6-36 / .003 over and chase those threads.
Then buy an AN/AS 6-36 /. 003 over bolt of correct length with a nylock feature, and go with life.
Then buy an AN/AS 6-36 /. 003 over bolt of correct length with a nylock feature, and go with life.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE
That may be just the ticket my friend.
Not being a machinist type, they .003 over won't require re-drilling the hole?
Not being a machinist type, they .003 over won't require re-drilling the hole?
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem UPDATE
No,
When are going to learn to trust me?
When are going to learn to trust me?
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE
It's not that I don't trust you, I go for clarification so I don't make assumptions.
Over the years they've gotten me into trouble. And not the fun kind of trouble either...
Over the years they've gotten me into trouble. And not the fun kind of trouble either...
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem UPDATE
It is a hole, 360 degrees.
You will be cutting a maximum of .0015, be sure you get a good start on the original thread.
You will be cutting a maximum of .0015, be sure you get a good start on the original thread.
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- Advanced Levergunner
- Posts: 6972
- Joined: Tue Apr 03, 2007 8:52 pm
- Location: Ridgefield WA. USA
Re: Martini Cadet trigger screw problem UPDATE
It sounds like the screws thread pitch does not match the holes thread pitch.
Same size ,different thread pitch? Modify ,if any,the screw not the gun.
Same size ,different thread pitch? Modify ,if any,the screw not the gun.
Re: Martini Cadet trigger screw problem UPDATE
He said it was 36 TPI?
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE
Got it Mescalero, thanks!
Nope. It's the original screw. Somehow or another the trigger guard threads got messed up and buggered the screw when I tried to re-install it.Chuck 100 yd wrote:It sounds like the screws thread pitch does not match the holes thread pitch.
Same size ,different thread pitch? Modify ,if any,the screw not the gun.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem UPDATE
Trust me awp101.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE
Took the trigger guard, trigger and screw to the local Fastenal today and explained my situation. He tried the screw in his gage but thought it was too big to be a #6 and too small for a #8. We went over and tried a 6-32 just for giggles and sure enough it screwed right in!
Settled on a 6-32x1" (to have some extra to work with) hexhead cap screw as the solution. He asked if I needed two so I'd have a spare.
Sure!
"OK, here's two and have a good weekend!"
So what's the damage?
"Nope, have a good weekend!"
Well how 'bout them apples! I had to turn down the diameter of the cap for it to screw in (drill press and file) to about where it needs to be and I might have to see if I can take some off the thread end of the cap to get it to screw in a little closer to how the original sat.
Now all I need to do is fab a forearm hanger and forearm for the .310, figure out what screw is needed to get the .218 Bee forearm attached, source another Weaver 68 mount for the Bee and refinish them both. WOOHOO!
Settled on a 6-32x1" (to have some extra to work with) hexhead cap screw as the solution. He asked if I needed two so I'd have a spare.
Sure!
"OK, here's two and have a good weekend!"
So what's the damage?
"Nope, have a good weekend!"
Well how 'bout them apples! I had to turn down the diameter of the cap for it to screw in (drill press and file) to about where it needs to be and I might have to see if I can take some off the thread end of the cap to get it to screw in a little closer to how the original sat.
Now all I need to do is fab a forearm hanger and forearm for the .310, figure out what screw is needed to get the .218 Bee forearm attached, source another Weaver 68 mount for the Bee and refinish them both. WOOHOO!
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-
- Advanced Levergunner
- Posts: 6972
- Joined: Tue Apr 03, 2007 8:52 pm
- Location: Ridgefield WA. USA
Re: Martini Cadet trigger screw problem UPDATE 2
So it was the wrong thread pitch for the hole??
Re: Martini Cadet trigger screw problem UPDATE 2
Apparently, wonder how he made that mistake.
He told me 36 TPI
He told me 36 TPI
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- Advanced Levergunner
- Posts: 6972
- Joined: Tue Apr 03, 2007 8:52 pm
- Location: Ridgefield WA. USA
Re: Martini Cadet trigger screw problem UPDATE 2
I am wondering also if it could have been metric??? Some sizes are very close but no cigar.
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- Advanced Levergunner
- Posts: 5670
- Joined: Mon Apr 09, 2007 7:13 pm
- Location: DeeDee Snavely's Used Guns and Weapons
Re: Martini Cadet trigger screw problem UPDATE 2
I got the screw size information second hand from another forum. I don't know if the poster measured his own or had the information stashed somewhere. I need to pick up one of those size gauges and what ever is used to measure threads (never had to do it before so I don't know).
The clerk said they didn't have 6-36 and I explained I wasn't 100% on that measurement, it was just what I had been told so he did the size measuring, we tried the 32tpi to see how close it might be and we got lucky.
The clerk said they didn't have 6-36 and I explained I wasn't 100% on that measurement, it was just what I had been told so he did the size measuring, we tried the 32tpi to see how close it might be and we got lucky.
Nothing so needs reforming as other people's habits.
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
-Mark Twain
Proverbs 3:5; Philippians 4:13
Got to have a Jones for this
Jones for that
This running with the Joneses boy
Just ain't where it's at
Re: Martini Cadet trigger screw problem UPDATE 2
Yeah, you need a TPI comparetor.