1911 build problem hammer issue

[tr6guns]

Maybe you should start with removing all parts first, then put just the hammer and pin in and see if everything is free. If it is then the Hammer and or sear holes are off. Also are the holes drilled Straight through both sides, or are they off on one side. Chances are there are not any parts themselves that are off that much. Modifying fire control parts is usually a no- no without precise gauges , polishing is OK. Next step get a welder and start over..

[acj415]

rudius 1911 hammer

I just started working on a 1911 rudius I guess I'm using a generic sarcoma kit...I also have encountered this problem. I noticed that when I replaced the sear pin with a slightly thinner punch the hammer started to work. Any advice?

[ar15barrels]

I just started working on a 1911 rudius I guess I'm using a generic sarcoma kit...I also have encountered this problem. I noticed that when I replaced the sear pin with a slightly thinner punch the hammer started to work. Any advice?

Fit EACH part to the frame INDIVIDUALLY before you start pairing up the parts within the frame.
Each part should move through it's particular full range of motion within the frame on it's pin.

[jericho89]

Your holes are off. The sear is not able to clear the pocket and allow the hammer to move properly. Your only option is to have the holes welded and re-drill the holes.

[acj415]

Damn I thought the parts need fitting, so basically if the parts go in and don't function correctly it's because I messed up the.drilling. I'm going to fill in the holes some how and re.drill it. Thanks

[kcstott]

the holes have a very precise tolerance and if they are off a touch yeah you can have issues

[jericho89]

Damn I thought the parts need fitting, so basically if the parts go in and don't function correctly it's because I messed up the.drilling. I'm going to fill in the holes some how and re.drill it. Thanks

Find someone with a jig to "sell you" so that you can legally use it to drill the holes in the proper place.

[acj415]

I used regular drill bits...do I need to buy percise drill bits.

[jericho89]

I used regular drill bits...do I need to buy percise drill bits.

No, the drill bits are not the problem. the problem is that there is very little room for error when it comes to location. It is VERY hard to hit all three marks with no error unless you use a jig or have a VERY precise way of measuring out the locations.

[acj415]

Okay bought a jig from ares

[Gunsmith Dan]

Like AR15 said first always check with just one part installed to check it moves freely before installing other parts that make contact.

Yes you have to exact with the holes because even one hundredth (0.01") of an inch can mean the difference between the sear not contacting the hammer at all to making to much contact.

While a sear making to much contact by frame holes being in the wrong place can be corrected by a gunsmith reshaping the hammer and sear contact points (would be cheaper replacing the frame), being to far apart means time for a new frame.

So if you do not have a mill machine then you need a JIG there is no way to do it free hand correctly.

Will not even get into making sure holes are perpendicular to the frame center point.

[kcstott]

How the hell did he drill the holes without a jig??

[tr6guns]

That sounds like the problems that some are having with building the 1911, a lot of people think they can build them with a set of calipers and a hand drill
or drill press. And also no knowledge of how the action works, what causes the problems and how to fix them.

[kcstott]

Wow if that's the case. It's no wonder these thing don't work worth a damn.



Look how tight the location call outs are .0005" - .0008" on location in most cases even with a jig this is going to be hard to do.
The jig has to have clearance for the drill to pass through, that clearance eats up your position allowance. Poor technique adds to the problem.

[ar15barrels]

How the hell did he drill the holes without a jig??

Tape measure, sharpie and a center punch.