Can anyone recommend a machinist to drill and tap a small hole?

kmcdonou · June 15, 2020, 10:03 AM

I have a rear sight that I would like to have a second set screw installed. The design of this sight is not the best and the recoil of the Sig P220 10mm can cause it to come loose at times.

I can probably address the issue by replacing the stock set screw with a knurled-cup point set screw and using red loctite on the threads and bottom of the dovetail. However, another set screw would probably eliminate the need for loctite on the bottom of the dovetail, and give me greater peace of mind.

Since I live in a rural area no-one around here can drill and tap a M3 x 0.5 mm thread set screw hole. Just curious if anyone knows of a place or someone on this board that I can mail the sight to and have this done?

kmcdonou · June 15, 2020, 12:21 PM

Someone offered to do this for me. Thanks for considering.

Erno86 · June 15, 2020, 01:42 PM

May I suggest that you tell Sig you want another rear sight that fits (instead of having someone drill & tap another hole for you). I had the same problem with my Kimber 1911. It took about 2 or three rear sights that Kimber sent me --- Till one finally fit.

I know that Sig wait times on the phone are terrible.

Otherwise...A Duffy's Gun Room gunsmith can help ya --- Over here in Maryland.

http://www.duffysguns.com

Good luck...

Erno

langenc · June 25, 2020, 07:30 PM

I was going to suggest to ask around your gun club. Id bet someone there would do it or give you a good reference to someone who would.

wjhenderson · July 1, 2020, 02:02 PM

I know my gunsmith could do it but I would first try what Erno86 suggested.

dfwkid · July 2, 2020, 08:06 PM

Using a tiny bit of Loctite on the threads would prevent the screw from loosening. Can be found at any auto parts store.

**4V50 Gary** · July 3, 2020, 05:47 PM

My classmate ThroneArms. He had 17 years as a machinist before going to TSJC. He has a full machine shop in his garage.

kmcdonou · July 4, 2020, 07:44 PM

Thanks for idea. If the person who offered to do it for me falls through I will follow-up with some of the leads given here.

I could send it back to Sig, but it is a better fix if I add another set screw. Plus if I replace the stock ones with knurled set screws, and add some blue loctite, the sight should never, ever move.

June 15, 2020, 10:03 AM	#1
kmcdonou Junior Member Join Date: July 11, 2008 Posts: 10	Can anyone recommend a machinist to drill and tap a small hole? I have a rear sight that I would like to have a second set screw installed. The design of this sight is not the best and the recoil of the Sig P220 10mm can cause it to come loose at times. I can probably address the issue by replacing the stock set screw with a knurled-cup point set screw and using red loctite on the threads and bottom of the dovetail. However, another set screw would probably eliminate the need for loctite on the bottom of the dovetail, and give me greater peace of mind. Since I live in a rural area no-one around here can drill and tap a M3 x 0.5 mm thread set screw hole. Just curious if anyone knows of a place or someone on this board that I can mail the sight to and have this done?

June 15, 2020, 01:42 PM	#3
Erno86 Senior Member Join Date: September 22, 2012 Location: Marriottsville, Maryland Posts: 1,739	May I suggest that you tell Sig you want another rear sight that fits (instead of having someone drill & tap another hole for you). I had the same problem with my Kimber 1911. It took about 2 or three rear sights that Kimber sent me --- Till one finally fit. I know that Sig wait times on the phone are terrible. Otherwise...A Duffy's Gun Room gunsmith can help ya --- Over here in Maryland. http://www.duffysguns.com Good luck... Erno __________________ That rifle hanging on the wall of the working class flat or labourer's cottage is the symbol of democracy. It is our job to see that it stays there." --- George Orwell Last edited by Erno86; June 15, 2020 at 02:00 PM.

July 3, 2020, 05:47 PM	#7
4V50 Gary Staff Join Date: November 2, 1998 Location: Colorado Posts: 21,838	My classmate ThroneArms. He had 17 years as a machinist before going to TSJC. He has a full machine shop in his garage. __________________ Vigilantibus et non dormientibus jura subveniunt. *Molon Labe!*

June 15, 2020, 12:21 PM	#2
kmcdonou Junior Member Join Date: July 11, 2008 Posts: 10	Someone offered to do this for me. Thanks for considering.

June 25, 2020, 07:30 PM	#4
langenc Senior Member Join Date: August 19, 2007 Location: Montmorency Co, MI Posts: 1,551	I was going to suggest to ask around your gun club. Id bet someone there would do it or give you a good reference to someone who would.

July 1, 2020, 02:02 PM	#5
wjhenderson Member Join Date: May 17, 2010 Location: GA Posts: 25	I know my gunsmith could do it but I would first try what Erno86 suggested.

July 2, 2020, 08:06 PM	#6
dfwkid Member Join Date: September 29, 2017 Location: Like the name says: DFW Posts: 26	Using a tiny bit of Loctite on the threads would prevent the screw from loosening. Can be found at any auto parts store.

July 4, 2020, 07:44 PM	#8
kmcdonou Junior Member Join Date: July 11, 2008 Posts: 10	Thanks for idea. If the person who offered to do it for me falls through I will follow-up with some of the leads given here. I could send it back to Sig, but it is a better fix if I add another set screw. Plus if I replace the stock ones with knurled set screws, and add some blue loctite, the sight should never, ever move.