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How to quickly find contact areas?


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Old 09-27-2017, 08:30 AM   #1
Scarlett_Pistol
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Default How to quickly find contact areas?

So I don't want to wait for several hundred to a thousand dry fires to find areas where there may be extra wear or contact in the action of my 75's.

An example is my SP-01. Over time I have come to find the hammer is rubbing a great deal on the frame due to some tolerance stacking. One indication was some very strong wear marks on the hammer, more so than I normally see.

I know the general points of contact to polish. This question is specifically what methods or tips do you all have/use to find out if areas are experiencing higher interfacing/wear than others?

Do you do some initial polishing with lower grit to expose the metal, then hit it with some marker, put it back in place, work the action, and see were the marker wears? That is all I can think of, but I know you all have a ton of experience and have paved the road for us young bucks. Thanks ya'll for any and all help!



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Old 09-29-2017, 02:29 PM   #2
Earl_Keese
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Originally Posted by Scarlett_Pistol View Post
So I don't want to wait for several hundred to a thousand dry fires to find areas where there may be extra wear or contact in the action of my 75's.

An example is my SP-01. Over time I have come to find the hammer is rubbing a great deal on the frame due to some tolerance stacking. One indication was some very strong wear marks on the hammer, more so than I normally see.

I know the general points of contact to polish. This question is specifically what methods or tips do you all have/use to find out if areas are experiencing higher interfacing/wear than others?

Do you do some initial polishing with lower grit to expose the metal, then hit it with some marker, put it back in place, work the action, and see were the marker wears? That is all I can think of, but I know you all have a ton of experience and have paved the road for us young bucks. Thanks ya'll for any and all help!
I didn't think about it when I commented on the other forum, but I do use a sharpie for checking friction surfaces. Mostly though, I just work the trigger repeatedly with each stage of reassembly to get a feel for things.



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Old 09-29-2017, 03:13 PM   #3
Scarlett_Pistol
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Originally Posted by Earl_Keese View Post
I didn't think about it when I commented on the other forum, but I do use a sharpie for checking friction surfaces. Mostly though, I just work the trigger repeatedly with each stage of reassembly to get a feel for things.
I think I'll give the sharpie a try this weekend so I don't have to order that marking compound. Good to hear sharpies work for you!
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Old 09-29-2017, 05:01 PM   #4
Earl_Keese
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I think I'll give the sharpie a try this weekend so I don't have to order that marking compound. Good to hear sharpies work for you!
I think CGW recommends using a sharpie for fitting a disco as well. Been awhile since I read the instructions. 😀
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Old 09-30-2017, 09:31 AM   #5
Scarlett_Pistol
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Good to hear! Haha makes two of us. I'll test this out tomorrow. I was working on my Pre B mag well last night and my fingers are raw from the filing. Need a break today and I need to go shooting.
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Old 09-30-2017, 01:03 PM   #6
Earl_Keese
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Good to hear! Haha makes two of us. I'll test this out tomorrow. I was working on my Pre B mag well last night and my fingers are raw from the filing. Need a break today and I need to go shooting.
Don't forget to check that your not filing the frame back so far that the sear cage sticks out. I almost made this mistake trying to fit MecGar 17 rnders. SP-01SHADOW saved me from this blunder, one of several. 😀



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