How to repair an oversized screw hole - Turnbull Custom Guns

[@perdidocamaronero5400]

The first center drill was a little bent. At the shop I worked in we used spot drills before drilling either holes to be tapped or through holes. I would set the depth of the spot drill to make a chamfer for the hole so I didn't have to chamfer in a second operation. It also made relief for the tap if it was a tapped hole. On curved surfaces we sometimes milled a flat the correct diameter before spot drilling so the drill wouldn't walk. Spot drills usually don't walk having a solid shank. At times we used center drills to spot hole locations the same way you did. Lots of ways to skin a cat if you have the right tools. Most of the parts I made on a milling machine would fit in a cigar box.

[@francisrotondo6485]

Great repair, Don.

[@Turnbullcustomguns]

Thanks.

[@markmacdonald9650]

Great job! I would trust you to do anything. Going to get this video around. I am getting some more projects for you to do. Again, I’m really impressed.

[@johnnyholland8765]

Good job on the repair. I have done similar repairs on different things.

[@DonandSandyTurnbull]

Nice job

[@gotsloco1810]

Have you considered Screw Machine length drills? I switched to M42 Cobalt 135° split point screw machine drills for most drilling on my Mill for work similar to that you are showing. Spot facing with a mill prior to drilling as mentioned in another post is also good practice.

[@Turnbullcustomguns]

I do like that Idea I have a few but not a full set. Great comment.

[@mikerobinson6606]

Awesome info. I have a Win 94 with an extra hole in the Upper tang. Would you recommend this same procedure? I had envisioned drilling the hole to a std size, tapering the top and bottom of the hole with a countersink, tig welding a plug into the hole, then filing and polishing as you did. Now that seems like a few too many unnecessary steps. Will hardness be a concern on the receiver tang? I will have to send it out to have the Logo restamped.

[@1917Enfield]

Did you hit it with cold blue when you were done? Outstanding work!

[@Turnbullcustomguns]

Thanks, I actually heated it some with the torch and dipped it in oil. It gives it a nice antique look that matches the 1920's vintage rifle bluing.

[@mikegraves6070]

Yes. My uncle taught me the oil dip trick in the 1970’s on certain small parts.

[@jilldorsch6636]

Please name the number of this Lyman 99 sight. Rarely seen nowadays and expensive. Tak.

[@Turnbullcustomguns]

I believe the markings on that tang sight is a "30 1/2" SA. I have another one in my possession that is identical, I use it in the video to compare the proper sweep in the tang. Mine is only marked with an "SA". As you mentioned these sights with the windage adjustment demand a premium. $250-$350.00 I have seen some sell for over $400. the same sight without windage is not worth as much. Thanks for watching.

[@Zek-vs6ox]

👏👏👏

[@Turnbullcustomguns]

Thanks for the applause!

[@timkohchi2048]

holy crap, if you have GTAW why in hell would you GMAW?...the weld could easily be hard in spots or have cold lap. and... you use COPPER as a chill plate, NOT aluminum. pros don't use Dremel...... im out

[@Adirondneck]

One of the biggest names in custom firearms is showing everyone some insight into how he does what he does and you want to try and gatekeep the "p" word on him because he used a certain brand rotary tool?🙄 Lmao

[@sonofadutchman9315]

Bye! You know we’re gunna miss you.

[@kruger1932]

wow! I'd love to see your video on doing something like this to see how the PROS do it!

[@Turnbullcustomguns]

Interesting stance. The tools you use do not separate professionals from armatures... When you operate a gunsmithing shop you learn when to employ certain methods. In this case I used in my opinion the most effective methods for the item being repaired, a peep sight. I chose GMAW for the ability to fill the void with the proper amount of excess weld to give me material for removal, and had neither cold lap or hard spots in the weld. It saved me time and my customer money on the repair. I used a Dremel to quickly remove the bulk of the material as opposed to filing the weld completely off, I then finished it off with a file achieving the same result as if I took the time to file the entire weld out. Being a professional is about giving your customers a quality job at a reasonable price.

[@Turnbullcustomguns]

@@Adirondneck I appreciate the kind words. Although I must point out that My company Turnbull Custom Guns is separate from Turnbull Restoration.

[@davidcarter8457]

As always, nice work. 👍🦬