threaded standoffs/ screws

Kevin McGovern

Kevin McGovern

Joined
Jul 31, 2015
Messages
3,118
If anyone uses this type of scale attachment, I would appreciate your input on the process you use. I have a process I believe will work, but it involves a good number of steps, and I'm thinking that someone has a simpler process (I like lowering the chance of error/ K.I.S.S.)

The hardware is 1/4" OD standoffs. 10-32 threads. Thanks in advance.

P_20170710_082923_vHDR_Auto.jpg
 
1- Drill tang holes to .235
2- Superglue one scale, transfer .235 holes
3- Superglue second scale to first scale, transfer .235 holes
4- Ream tang holes to .249 so standoff is press fit
5- Ream scales to .251 so standoff is slip fit
6- Counterbore or countersink scale holes depending on the screw type I'm using.
7- Shape scales like I would a glued knife except on and off to get the fronts, etc.

However, I'm having some screws made because I don't care for this 3 part make up. They will eliminate a couple steps and allow the use of an industry standard counterbore.

upload_2017-7-10_10-5-7.png
 
Thanks Kuraki. That's about what I was thinking. Basically, it will end up similar to a 1911 grip with a bushing/ screw set up. I like the fastener you designed. I can't make out the dimensions. What counter bore will work? It would be awesome if a Kreg jig step bit worked for drilling the scales (i am planning on using that in my process) since they are readily available and inexpensive.
 
kuraki said:
1- Drill tang holes to .235
2- Superglue one scale, transfer .235 holes
3- Superglue second scale to first scale, transfer .235 holes
4- Ream tang holes to .249 so standoff is press fit
5- Ream scales to .251 so standoff is slip fit
6- Counterbore or countersink scale holes depending on the screw type I'm using.
7- Shape scales like I would a glued knife except on and off to get the fronts, etc.

However, I'm having some screws made because I don't care for this 3 part make up. They will eliminate a couple steps and allow the use of an industry standard counterbore.

View attachment 732169
Click to expand...

I thought there was a Chain Ring Bolt that size?
 
Kevin McGovern said:
Thanks Kuraki. That's about what I was thinking. Basically, it will end up similar to a 1911 grip with a bushing/ screw set up. I like the fastener you designed. I can't make out the dimensions. What counter bore will work? It would be awesome if a Kreg jig step bit worked for drilling the scales (i am planning on using that in my process) since they are readily available and inexpensive.
Click to expand...

You can use 1911 screw bushing in blades. Thy are cheep and the threaded section is not very long so you can thread the tang and thread one in both sides.
 
I've begun using 8-32 torx screws and threaded aluminum standoffs in some of my knives. It has worked well so far.

Here is my process for the blank
- water jet hole to .242
- drill out with .25 drill bit
-ream with .253 reamer
for scales
- drill hole with .25 drill bit
-ream with .253 reamer

With this procedure the holes are extremely tight and its actually a massive pain to get the scales on and off so what I do is cheat a little bit and countersink the down sides of the scales and then take the .253 reamer and with a hand drill, wiggle the reamer around a bit in in the scale to create a bit of extra space. This helps the scales come on and off a bit easer and isn't really a problem tolerance wise since I marry all of my scales to the tang on the grinder.
 
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