Rifle Scopes Nightforce ring torque question

[mark5pt56]

Hey, just want to make sure nothing has changed in regards to cross bolt torque on the Night Force rings sets. I'm used to 65 inch pounds, think they always state 68, however, new set of the A268 states not to exceed 100 inch pounds. Is it necessary to go that high or is the time tested spec of 65 adequate? Since this is the 6 screw, wondering if that is unique to them vs. the 4 screw. Will be on a LMT MWS.

Mark

https://www.milehighshooting.com/nightforce-a268-1-375-x-high-30mm-ultralite-rings/

 

[BobinNC]

As far as I know this still stands...

Nightforce Torque Specifications
• Base attachment screws - 25 inch pounds
• Ring top screws - 25 inch pounds
• Ring crossbolt nut - 68 inch pounds

 

[NGCSUGrad09]

The 6 screw rings require 100 in/lbs due to the larger clamping surface area.

 

[mark5pt56]

As far as I know this still stands...

Nightforce Torque Specifications
• Base attachment screws - 25 inch pounds
• Ring top screws - 25 inch pounds
• Ring crossbolt nut - 68 inch pounds

Sounds good, that's what I know from past data. The card on these state do not exceed 100 on the cross bolt. I'm guessing the intent is to use these on something with more recoil energy than a .308. I'll run the 65 as I have a Seekonk T handle, for some odd reason they move, I have an adjustable.

 

[mark5pt56]

The 6 screw rings require 100 in/lbs due to the larger clamping surface area.

Ah, didn't see this, does it matter with an aluminum "base" (MWS) in regards to torque/damage to the base?

 

[Millworks]

The 6 screw rings require 100 in/lbs due to the larger clamping surface area.

Do NOT torque the screws on the ring caps to 100 inch pounds. You could stand a chance of damaging your scope.

 

[Millworks]

As far as I know this still stands...

Nightforce Torque Specifications
• Base attachment screws - 25 inch pounds
• Ring top screws - 25 inch pounds
• Ring crossbolt nut - 68 inch pounds

This man has given you good solid information and these specs are recommended by most manufactures.

 

[NGCSUGrad09]

Do NOT torque the screws on the ring caps to 100 inch pounds. You could stand a chance of damaging your scope.

The cross bolt nut that's a 1/2 inch needs this spec. Ring cap screws are 25 in/lbs.

 

[mark5pt56]

It's in the OP and referenced the cross bolt and was clear the question pertains to that.

 

[jsimonh]

Bringing this up from the dead because I just stripped one of the nuts on my new 6 screw NF ultralites at 90 inch pounds. Cross bolt looks fine but the nut is shit. Going to see if the hardware has something to get me by. Ill call NF on Monday to talk to them. I originally went to 65 and thought about stopping, shouldve stuck with my gut. 100 inch pounds seems like a lot to me. Will 65 work on these or do they have to be around a 100? It's on a 6.5x47L holding a BEAST on.

 

[PAYDIRT]

Bringing this up from the dead because I just stripped one of the nuts on my new 6 screw NF ultralites at 90 inch pounds. Cross bolt looks fine but the nut is shit. Going to see if the hardware has something to get me by. Ill call NF on Monday to talk to them. I originally went to 65 and thought about stopping, shouldve stuck with my gut. 100 inch pounds seems like a lot to me. Will 65 work on these or do they have to be around a 100? It's on a 6.5x47L holding a BEAST on.

That sux. I have two sets of those and I thought 100 was way too much also. So I pussed out somewhere under that. One set is on a 308 and I shoot 175's.

 

[Nik H]

I never go beyond 85 in-lbs. I had an article once that provided some test results on different rails and 100 in-lbs damaged some.

85 inch pounds on the 6 bolt rings has never let me down

 

[TRP173]

Always good to use the MFG advise however it's also good to have a torque chart available that gives min and max for size and materials.

 

[mike10]

I never go beyond 85 in-lbs. I had an article once that provided some test results on different rails and 100 in-lbs damaged some.

85 inch pounds on the 6 bolt rings has never let me down

What torque wrench do you have?

 

[David4570]

I recommend using the Nightforce torque tool set. It has two preset socket holders at 25 and 68 in/lbs.

 

[Nik H]

What torque wrench do you have?

I use the Borka wrench

 

[kortik]

I recommend using the Nightforce torque tool set. It has two preset socket holders at 25 and 68 in/lbs.

I also recommend this NF torque tool set. It is composed of the Borka Tools PTLs (precision torque limiters). Worked for a couple of years with NF to make it happen...

Boris
Borka Tools

 

[David4570]

Thanks Boris! It’s a great piece of kit in a nice little package.

 

[wildturkey2]

Thanks Boris! It’s a great piece of kit in a nice little package.

Ok good information

 

[JWG]

Nightforce was originally 15 in-lb, but they upped it to 25 in-lb because people often called in asking "Is 15 enough for my such and such...?"

 

[Nik H]

I never go above 20 in-lbs. I have never had a problem with the NF rings slipping at that torque setting.

 

[Cutout]

Why not just use the manufacturer's spec? If it calls for 25 inch pounds, use 25 inch pounds. If it calls for 18 inch pounds, use 18 inch pounds. You didn't engineer the rings. What makes you think you know better than the manufacturer? I don't get this reasoning. Maybe somebody can explain it to me.

 

[JWG]

Why not just use the manufacturer's spec? If it calls for 25 inch pounds, use 25 inch pounds. If it calls for 18 inch pounds, use 18 inch pounds. You didn't engineer the rings. What makes you think you know better than the manufacturer? I don't get this reasoning. Maybe somebody can explain it to me.

Exactly this. Different thread sizes, pitches, ano finishes, etc. will influence compression vs. friction (which is what torque wrenches actually measure).