Variable Torque Adjustment Screwdriver for Red Dot

OnTarget · Jan 3, 2022

I'm looking at an adjustable torque screwdriver to be used for pistol red dot scope in the 3 to 10 inch pound range. Most descriptions say "pre set" adjustable.
Many buyers wind up upset because they did not order the right one, e.g,. variable torque adjustment screwdriver.
I'm confused by the word "pre-set" in the description of many different ones. What exactly should I be looking for?
I kind of like the Wera 05074710001 (2.4-11.5 " lb range), but I want to make sure that I am buying the right one.
Hope I did a decent job explaining this.
Comments welcome.

outrider58 · Jan 3, 2022

Most people including me use these...

https://www.homedepot.com/p/WHEELER...975fd1858e1412c71587b056b4174d36&gclsrc=3p.ds

Trigger Time · Jan 3, 2022

The Wheeler FAT wrench is the ticket! I find it handy for a lot of other projects the require an inch pound torque setting .

K3LAG · Jan 3, 2022

Another vote for the Wheeler FAT Wrench.

Vortex sells a pretty nice one too but the Wheeler is widely available and can often be found on sale.

OnTarget · Jan 3, 2022

Okay, but the Venom requires 9 inch lbs., so I read. The Wheeler starts at 10. What about those pistol red dots that require less than 10?

ken792 · Jan 3, 2022

I use a trigger scale and measure how far out on an Allen wrench to place it to get my desired torque.

K3LAG · Jan 3, 2022

The instructions I see for the Venom say 12-15 in. lbs.

I believe you could actually set the FAT Wrench below the 10 if you wanted to. If it calls for 9, 10 would be fine. Wheeler claims the accuracy is within 2 lbs anyway. I tighten most red dots to about 14-15 in lbs unless it is something unusual.

With any torque wrench of that type you should store it with no tension on the spring so be sure to turn it all the way down before you put it away.

Trigger Time · Jan 3, 2022

9 inch pounds isn't very much, I doubt you would do any damage going to 10.

OnTarget · Jan 3, 2022

Trigger Tuner said:
9 inch pounds isn't very much, I doubt you would do any damage going to 10.

The screws are so tiny and go into polymer, I believe. Trying to get one out if broken, well, you know....

outrider58 · Jan 3, 2022

I've never found a need to use a torque wrench on a red dot sight. A little dab of blue Locktite on the screws and call it good.

jrumann59 · Jan 3, 2022

outrider58 said:
I've never found a need to use a torque wrench on a red dot sight. A little dab of blue Locktite on the screws and call it good.

I agree with this. I have at least 2 dozen tubes of blue loctite through out my house. :innocent0

Melnic · Jan 3, 2022

you may end up paying for the fat wrench by using it and never over torquing a scope screw and breaking something. Also good for stock action screws so that you get it consistent. There are a lot of milsurps where setting a consistent screw holding Action to the stock makes a difference (Mosin for example) I always thought a FAT wrench was a required tool for rifle owners.

outrider58 · Jan 3, 2022

Melnic said:
you may end up paying for the fat wrench by using it and never over torquing a scope screw and breaking something. Also good for stock action screws so that you get it consistent. There are a lot of milsurps where setting a consistent screw holding Action to the stock makes a difference (Mosin for example) I always thought a FAT wrench was a required tool for rifle owners.

I wasn't saying not to buy one. I don't touch a scope mount or scope ring without using a Fat Wrench. In fact, I use one any time I need to tighten two(or more) screws in tandem anywhere on an AR, etc. Every gun owner who mounts scopes should have one. Now, for a red dot, especially a one screw red dot that you'll be removing and moving now and then, nah. But any time you have two screws serving the same pressure, you want them evenly torqued. Otherwise, you might as well only use one screw.

RMRs and such, I don't see the need. Blue Locktite and hand tighten with an Allen a or Torx.

John from MD · Jan 3, 2022

https://www.midwayusa.com/product/1021740444?pid=385166

It is made by Vortex and it slips over when you hit the torque setting. I have checked it with a laboratory calibrated torque wrench and it is right on. It cost a little more but I feel it is better quality than the FAT wrench.

outrider58 · Jan 3, 2022

John from MD said:
https://www.midwayusa.com/product/1021740444?pid=385166

It is made by Vortex and it slips over when you hit the torque setting. I have checked it with a laboratory calibrated torque wrench and it is right on. It cost a little more but I feel it is better quality than the FAT wrench.

Will it work in reverse? When testing AR bolt carriers, you need a torque driver that also works in reverse.

John from MD · Jan 3, 2022

outrider58 said:
Will it work in reverse? When testing AR bolt carriers, you need a torque driver that also works in reverse.

That I can't tell you but I do know it can be set in 1 lb increments which is important when dealing with small screw threads like 4-40, 6-32 etc.

DanGuy48 · Jan 4, 2022

I bought an earlier model of one of these to tighten scope rings to specs.

https://www.youtube.com/watch?v=ZrTuNZH-mYc

OnTarget · Jan 4, 2022

John from MD said:
https://www.midwayusa.com/product/1021740444?pid=385166

It is made by Vortex and it slips over when you hit the torque setting. I have checked it with a laboratory calibrated torque wrench and it is right on. It cost a little more but I feel it is better quality than the FAT wrench.

I always thought these started at 10 in. lbs. and up. Where does yours start? I want something that will also cover 0 to 10.
Thanks!

OnTarget · Jan 4, 2022

A different question: Which screws do you use for a Holosun 507K-X2 red dot being installed on a SIG 365XL? Package comes with two different sets. Not wanting to ruin the threads.

outrider58 · Jan 4, 2022

OnTarget said:
A different question: Which screws do you use for a Holosun 507K-X2 red dot being installed on a SIG 365XL? Package comes with two different sets. Not wanting to ruin the threads.

Should be the same thread pattern, just different lengths? If not, go slow. You'll know right away...

Variable Torque Adjustment Screwdriver for Red Dot

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