EngineerEli Posted April 27, 2015 Share Posted April 27, 2015 (edited) So, while installing some go fast parts in my Stock III last night I buggered up some of the roll pins. Luckily I was either able to salvage them well enough, or have spares. I looked on LRA and they carry all the roll pins but charge $4 a piece which seems a little crazy... Looking on McMaster-Carr you can get a package of 100 of most given sizes for between $4 and $12: http://www.mcmaster.com/#standard-spring-pins/=wxqnd5 So my question is this. Does anyone know the actual sizes of each individual pin? Please feel free to fill in the below list in a reply. Pin Size (M? X Length) Trigger.......................................??? Trigger Bar................................??? Right side safety paddle...........??? Disconnector/Interrupter**........??? Hammer Strut**.........................??? Extractor....................................??? (** Are the disconnector and hammer strut pins the same?) Second question. Tanfo seems to use 'coiled spring pins' for most of their pinned connections, these seem to me like they get deformed much more often than 'slotted spring pins.' Has anyone ever tried using slotted pins in place of the coiled ones in their Tanfo's or CZ's or any gun. Or know why one is generally chosen over the other? Edited April 27, 2015 by EngineerEli Link to comment Share on other sites More sharing options...
praetorian97 Posted April 27, 2015 Share Posted April 27, 2015 (edited) Great post. Following. I have some of these in my spare parts kit I can measure without pulling them from the gun. Post them later. Edited April 27, 2015 by praetorian97 Link to comment Share on other sites More sharing options...
cvincent Posted April 27, 2015 Share Posted April 27, 2015 In my experience the coiled pins seem to require less effort to drive in and out. Other than that...? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
bayougump Posted April 28, 2015 Share Posted April 28, 2015 If we get sizes and you order a package of 100 in some I'd be happy to take some and send you a little dough, can never have too many spare pins Link to comment Share on other sites More sharing options...
Stician Posted April 30, 2015 Share Posted April 30, 2015 Or use the opportunity to get roll pin punches made of brass and drive them back without mushrooming a roll pin. It bugs me to see bare metal when every other small part is black. Link to comment Share on other sites More sharing options...
Duke Nukem Posted April 30, 2015 Share Posted April 30, 2015 Looking forward to the Great post that's coming. Link to comment Share on other sites More sharing options...
bayougump Posted April 30, 2015 Share Posted April 30, 2015 Looking forward to the Great post that's coming. Huh? Link to comment Share on other sites More sharing options...
jmbaccolyte Posted April 30, 2015 Share Posted April 30, 2015 I'm learning things everyday here. And they say you can't teach an old dog new tricks. Wait, I mean "tricks" as in dog tricks- not human tricks. PS: This wasn't the Great post that the Duke is waiting for in case anyone was confused, I just couldn't resist. Link to comment Share on other sites More sharing options...
EngineerEli Posted May 1, 2015 Author Share Posted May 1, 2015 (edited) Based on my measurements last night: Pin Size (MM - DIA. X LENGTH) Trigger....................................... 2.5X18 Trigger Bar................................ 2.5X8 Disconnector/Interrupter**........ 2.5X8 Hammer Strut**......................... 2.5X8 Extractor.................................... 2.5X15 Right side safety paddle........... 1.5X12 Available parts from McMaster Carr Metric Slotted Spring Pins: http://www.mcmaster.com/#standard-spring-pins/=wzple0 Metric Coiled Spring Pins: http://www.mcmaster.com/#standard-spring-pins/=wzpmx0 If you look they show 2.5 dia. pins for both styles, the 1.5 dia. pins are only available from this site in the slotted pin form. Also, they offer stainless pins in addition to the standard blackened steel pins. Slightly weaker but I wouldn't be concerned. May look nice on the hard chromed guns! If one doesn't come in a length you need I would think you could order long and cut it to the needed size, but make sure you chamfer the edge you cut, or at the very least make sure you drive it in form the remaining chamfered end. But hey if you get a pack of 25 for less than 10 bucks, you can afford to mess arround with a few Disclosure: All shared information is based on my measurements and is a 'best guess' of the correct parts to use. Attempt at your own risk. (not a lot of risk involved though, lol) Edited May 1, 2015 by EngineerEli Link to comment Share on other sites More sharing options...
bayougump Posted May 1, 2015 Share Posted May 1, 2015 The only pin I've ever had an issue with was the right side safety pin. For some reason they were a pain and I mushroomed quite a few before getting a pin to work in a few of my guns Link to comment Share on other sites More sharing options...
EngineerEli Posted May 1, 2015 Author Share Posted May 1, 2015 Here is an interesting data sheet form one of the spring pin manufacturers, just helps you understand how all the tolerances work and how much compression occurs when installing these pins. Also covers the clearance needed when drilling holes. Coiled Spring Pins: https://www.spirol.com/library/sub_catalogs/cldp-Standard_Coiled_Pins_us.pdf Slotted Spring Pins: https://www.spirol.com/library/main_catalogs/sltp_us.pdf Link to comment Share on other sites More sharing options...
praetorian97 Posted May 1, 2015 Share Posted May 1, 2015 I would do the coiled over the slotted. Link to comment Share on other sites More sharing options...
EngineerEli Posted May 1, 2015 Author Share Posted May 1, 2015 I would do the coiled over the slotted. Why? I would actually think the slotted are less prone to being damaged during installation and removal. Can anyone chime in and say if CZ's or other manufacturers use coiled or slotted spring pins? Link to comment Share on other sites More sharing options...
praetorian97 Posted May 1, 2015 Share Posted May 1, 2015 (edited) Coiled Pins were invented to address the drawbacks of the Slotted Pins, and to offer the Design Engineer the flexibility to tailor the pin’s strength and flexibility to match the application. The Coiled Pin is the most capable of absorbing shock and vibration after insertion, therefore providing prolonged useful life of the assembly. Source https://www.spirol.com/library/whitepapers/Pins_To_Max_Assembly_Life.pdf Edited May 1, 2015 by praetorian97 Link to comment Share on other sites More sharing options...
praetorian97 Posted May 1, 2015 Share Posted May 1, 2015 Is anyone going to be ordering some? Id chip in for some back up parts. Link to comment Share on other sites More sharing options...
bayougump Posted May 1, 2015 Share Posted May 1, 2015 I'll chip in for some parts too Link to comment Share on other sites More sharing options...
praetorian97 Posted May 1, 2015 Share Posted May 1, 2015 Before Mods get up in here. This is not a group buy. Its a redistribution of an over purchase. Link to comment Share on other sites More sharing options...
EngineerEli Posted May 1, 2015 Author Share Posted May 1, 2015 I'm in too in one capacity or another. Link to comment Share on other sites More sharing options...
jom Posted May 1, 2015 Share Posted May 1, 2015 Im in Link to comment Share on other sites More sharing options...
Beastly Posted May 1, 2015 Share Posted May 1, 2015 Interested Link to comment Share on other sites More sharing options...
skullmug Posted January 19, 2016 Share Posted January 19, 2016 This is great info, Thanks so much! Link to comment Share on other sites More sharing options...
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