Action truing fixture

[Mram10us]

Been down with the flu and decided to get one of these made up to mount in my 3 jaw. Had a chunk of 3" bar stock that I turned down and bored to have .020" play for the action. Screws are flush mounted 3/8-24 socket head and 1" apart.

 

[sturner]

Tagging glad your feeling better

 

[Mram10us]

Tagging glad your feeling better

Thank you. Got a bunch of good ideas from Alex and company here, so I had to implement them and get this project done. I'll true up an action with it and see if my results are better than my other setup

 

[sturner]

Good deal

 

[can1010]

glad your back on your feet. I hade it 2 weeks ago was not fun. the truing gigs I have seen have padded screws so they don't mar the action finish, maybe use brass shim material slid between action and screws or a rubber o-ring in the bolt holes. how is your ring die working if you had a chance to try it out

 

[Blancoalex]

Nice job on truing jig. That is a big chunk of metal should be very rigid.

 

[Mram10us]

glad your back on your feet. I hade it 2 weeks ago was not fun. the truing gigs I have seen have padded screws so they don't mar the action finish, maybe use brass shim material slid between action and screws or a rubber o-ring in the bolt holes. how is your ring die working if you had a chance to try it out

I considered putting brass tips on the screws ... still might. I cerakote everything after building, so a little mar doesn't bother me, but never know when that might change.
Ring die worked great. .002" under target seemed to do the trick. Just need to get out on a decent day and shoot them.

 

[Blancoalex]

Mram10us , use lead flat strips to wrap parts that don't want to marr. They are lead wraps for fishing lures. I got them off ebay whileback . Be happy send pic when back at machine shop if you want see.

 

[Mram10us]

Mram10us , use lead flat strips to wrap parts that don't want to marr. They are lead wraps for fishing lures. I got them off ebay whileback . Be happy send pic when back at machine shop if you want see.

Great idea, but how thick are they? I have less than .020" slop

 

[Blancoalex]

I think only .005 , but let me verify tomorrow and send you pic. They also "grip" well being pure lead.

 

[bigngreen]

McMaster Carr swivel tip set screws, you won't beat them and they will actually pivot and hold unlike anything solid tipped, if you put lead under anything it will move, .005 brass shim stock under the pivot screws will not move or compress but you have to have a set up bar that won't move either to tell!

 

[Mram10us]

Tried the jig tonight and it worked well. Took about 10 minutes to dial in with my .0005 indicators. After the machining, I put the bar back in to verify nothing moved and all was good. Just need a nice setup For threading in reverse at high speed. The carbide sure leaves a nice finish at 400+

 

[bigngreen]

Do you know your bar is true?

 

[Mram10us]

Do you know your bar is true?

Pretty sure. I have good indicators and turned the bar between centers. If I can't turn an 8" bar to within .0005", I shouldn't be building rifles