Smith & Wesson Forum

Go Back   Smith & Wesson Forum > >


Reply
 
Thread Tools Display Modes
  #1  
Old 09-01-2017, 04:23 PM
walldogs walldogs is offline
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Apr 2017
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default replacing fiber optic tube on a SDM revolver front sight

I purchased a S & W 625 that has a SDM fiber optic tube front sight. The plastic tube is missing and I ordered one on e-bay. The sights that have holes all the way through call to heat up both ends of the tube, the SDM sight has one end that is drilled all the way through but the other end is a blind hole. Do you heat up only one end and pull it into the sight, or is the blind hole end glued in to hold the tube in ?
Reply With Quote
  #2  
Old 09-01-2017, 07:26 PM
Inusuit Inusuit is online now
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Feb 2013
Location: SE Wyoming
Posts: 1,375
Likes: 1,596
Liked 1,658 Times in 635 Posts
Default

I have a couple of handguns with fiber optic sights, but am not familiar with your revolver and sight setup. I would not glue the rod (tube) because that will make it difficult to replace the next time it breaks. That's the downside of FO sights, IMHO, in that they are somewhat fragile. I carried replacement rods for my competition gun.

Again, without knowing the configuration of your sights, I suggest that you cut the rod to the correct length, then insert one end into the blind hole and heat the other end with a match or lighter. That end will expand slightly and hold the rod in place. May take a couple tries to get it right.

That's how it worked with my FO sights, although they were open on both ends. Others here who are familiar with your specific firearms may have better advice.
Reply With Quote
  #3  
Old 09-02-2017, 10:59 PM
tomcatt51 tomcatt51 is offline
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Apr 2007
Location: never never land, USA
Posts: 2,920
Likes: 114
Liked 715 Times in 467 Posts
Default

SDM frequently break their FO rods because they crimp the sight down onto the rod to hold it in place and usually crack the rod in the process. When I used SDMs I'd drill the hole for the FO all the way thru so I could heat both ends.

Then I found .100" wide FO fronts here and quit using SDMs.
Custom S&W revolver front and rear sights-LOCKED DUE TO LENGTH - Protocall Design - Brian Enos's Forums... Maku mozo!
Reply With Quote
The Following 2 Users Like Post:
  #4  
Old 09-04-2017, 04:34 PM
walldogs walldogs is offline
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Apr 2017
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default

Thanks tomcat, I will try removing the sight and drill it out. I tried a .060 fiber optic rod and it would not fit in the back of the sight, like you said they must have crimped the original in.
Reply With Quote
  #5  
Old 09-04-2017, 05:17 PM
Toolguy Toolguy is online now
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Jan 2010
Location: Kansas City area
Posts: 684
Likes: 2,309
Liked 681 Times in 311 Posts
Default

The .060 fibers are 1.5mm. The best drill bit for that one is 1/16 or .062.

Some sights, like mine, are .040, or 1mm. The best drill bit to use for 1mm is a #57 which is .043. The holes need to be a bit oversize, as the fibers are not an exact size, but a little bit variable in diameter.

The best fix is in post #3, drill through and melt both ends. If only one end is melted, it won't stay in.
Reply With Quote
  #6  
Old 09-05-2017, 08:52 PM
walldogs walldogs is offline
Member
replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight replacing fiber optic tube on a SDM revolver front sight  
Join Date: Apr 2017
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default

Thanks toolguy, the #53 drill at .0595" is too small and was worried that 1/16 at .062" would be too loose. I miked the glass rod and its .061", I will try the 1/16 drill. Thanks Again All !
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
M&P 9 FS Fiber Optic Front Sight ? Grimjaws Smith & Wesson M&P Pistols 5 02-29-2016 11:17 AM
Help with Fiber Optic front sight... USARMYSPEC4 S&W Revolvers: 1980 to the Present 5 06-25-2015 04:24 PM
Fiber optic front sight for 681? TAROMAN S&W-Smithing 2 09-14-2014 03:07 PM
M&P .22 with new fiber optic front sight dave33 Smith & Wesson M&P Pistols 9 03-10-2013 06:23 AM
Fiber optic front sight StanNm19 Smith & Wesson Competitive Shooting 8 05-03-2012 05:25 PM

Powered by vBadvanced CMPS v3.2.3
smith-wessonforum.com tested by Norton Internet Security smith-wessonforum.com tested by McAfee Internet Security

All times are GMT -4. The time now is 05:54 PM.


S-W Forum, LLC 2000-2015
Smith-WessonForum.com is not affiliated with Smith & Wesson Holding Corporation (NASDAQ Global Select: SWHC)