Can someone refresh my memory on the proper torque ratings on the scope mount to rail torque and the scope mounts to scope torque. Thanks
Rifle Scopes torque on scope mounts
- Thread starter kingfamous
- Start date
Re: torque on scope mounts
that depends on what mount you have, there all diffrent depending on the size screws they use on them. my nightforce uni mount calls for 25in/lbs on the cap screws and 68 in/lbs on the base bolts, my Burris XTRs call for 20 in/lbs on the caps and 65-100 on the mounting nuts as per there specs.
that depends on what mount you have, there all diffrent depending on the size screws they use on them. my nightforce uni mount calls for 25in/lbs on the cap screws and 68 in/lbs on the base bolts, my Burris XTRs call for 20 in/lbs on the caps and 65-100 on the mounting nuts as per there specs.
Re: torque on scope mounts
Badger ordnance 30 mm steel rings:
Upper ring halves 15 in/lbs
Cross bolt nut 65 in/lbs
Burris XTR 30 mm aluminum rings:
Upper ring halves 20 in/lbs
Cross bolt nut 65 to 100 in/lbs
This are the two I installed lately that I can remember, hope this helps you.
Badger ordnance 30 mm steel rings:
Upper ring halves 15 in/lbs
Cross bolt nut 65 in/lbs
Burris XTR 30 mm aluminum rings:
Upper ring halves 20 in/lbs
Cross bolt nut 65 to 100 in/lbs
This are the two I installed lately that I can remember, hope this helps you.
Re: torque on scope mounts
Check with you scope and ring manufacturer.
Check with you scope and ring manufacturer.
Re: torque on scope mounts
they are PRI steel mounts, I will give them a call.
they are PRI steel mounts, I will give them a call.
Re: torque on scope mounts
I have always used 65 inch pounds. Never had a problem.
I have always used 65 inch pounds. Never had a problem.
Re: torque on scope mounts
http://www.snipershide.com/forum/ubbthre...rue#Post2816342
I need to make a video on how to calculate what torque to use for a given thread, # of threads engagement, material of the female threads, type of lubricant, and screw steel strength.
I have worked at companies where the mechanical engineers had very complicated methods of calculating toque specs, but the Caterpillar formula in the above link is very simple and fast.
And it is good to verify the calculations with a destructive test on some scrap of metal:
<span style="font-style: italic">I bought an inch pounds torque wrench at Harbor Freight for $20.
I milled some mild steel to .1" thick.
I drilled and tapped 4 holes with #21 drill.
I expect that I should be ok with 52% of the usual high ratings
..a) waxed 52% of 34 in lb = 17.8 in lb, but got a 15 and a 16 yield
..b) lubed 52% of 51 in lb = 26.5 in lb, but got yield at 28 in lb
..c) dry 52% of 68 in lb = 34.7 in lb, but got yield at 34 in lb</span>
As you can see, the female threads are stripping out within a few per cent of the calculated value, so the formula is working.
http://www.snipershide.com/forum/ubbthre...rue#Post2816342
I need to make a video on how to calculate what torque to use for a given thread, # of threads engagement, material of the female threads, type of lubricant, and screw steel strength.
I have worked at companies where the mechanical engineers had very complicated methods of calculating toque specs, but the Caterpillar formula in the above link is very simple and fast.
And it is good to verify the calculations with a destructive test on some scrap of metal:
<span style="font-style: italic">I bought an inch pounds torque wrench at Harbor Freight for $20.
I milled some mild steel to .1" thick.
I drilled and tapped 4 holes with #21 drill.
I expect that I should be ok with 52% of the usual high ratings
..a) waxed 52% of 34 in lb = 17.8 in lb, but got a 15 and a 16 yield
..b) lubed 52% of 51 in lb = 26.5 in lb, but got yield at 28 in lb
..c) dry 52% of 68 in lb = 34.7 in lb, but got yield at 34 in lb</span>
As you can see, the female threads are stripping out within a few per cent of the calculated value, so the formula is working.
