ERA-TAC does not recommend an amount of torque to apply to the nuts. The scope I have, is a 5-25x56 Schmidt and Bender illuminated PM II. How much torque do you apply to the side nut when mounting the 34mm ERA-TAC mount, to the rifle ? What about applying torque to the screws when locking the rings ?
- Thread starter ralfabco
- Start date
https://www.bing.com/videos/search?q...A43D&FORM=VIRE
If this is yours as shown or similar, at 45 seconds you will see a 10-12 Nm's on the cross bolt nut. Do a search for a conversion to inch pounds.
BUT, I WOULD CHECK THAT BECAUSE THAT'S A LOT OF TORQUE.
http://www.thetoolhut.com/Torque-Con...ch-Pounds.html
I don't see why 45 inch pounds wouldn't be ok to be operational until you find out.
If this is yours as shown or similar, at 45 seconds you will see a 10-12 Nm's on the cross bolt nut. Do a search for a conversion to inch pounds.
BUT, I WOULD CHECK THAT BECAUSE THAT'S A LOT OF TORQUE.
http://www.thetoolhut.com/Torque-Con...ch-Pounds.html
I don't see why 45 inch pounds wouldn't be ok to be operational until you find out.
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10-12 Nms is about 88-106 inch pounds. That's sounds high, but is really only about 8 foot pounds on the high side. Not that much for a mount to rail torque in my opinion. I wouldn't hesitate to use it.
I bought a Warne 20 MOA mount and the instructions call for 65 in/lbs when mounting to the rail. I too think that's a bit much.
When torquing a larger diameter bolt, 80-90 inch pounds is not that much. If we were talking screw caps to hold the scope in, I'd agree that it's too much, but you are using jut two bolts to torque a mount to a rail.
First off, look at the design of the mount. It is being compressed onto the rail. Secondly, the mount is a cantilever design and is expected to securely hold a 2-3 pound scope in place against recoil.
First off, look at the design of the mount. It is being compressed onto the rail. Secondly, the mount is a cantilever design and is expected to securely hold a 2-3 pound scope in place against recoil.
Here is the instruction sheet. It says 12 Nm max. Torque:
http://era-tac.de/attachments/article/121/era-tac-mount-adjustable-angle.pdf
http://era-tac.de/attachments/article/121/era-tac-mount-adjustable-angle.pdf
For big nuts on the side like that I have yet to have anything fail at 45. For the ring caps 15 has always served well.
Thanks for the comments. FYI - I have a plain mount with cross bolts. It does not have an adjustable MOA option. No instruction sheet was included inside of the box which recommended a torque solution. I imported the mount directly from ERA-TAC.
typically 55 on the ring to the base
20 for the top of the rings
20 for the top of the rings
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