|
Forum Rules | Firearms Safety | Firearms Photos | Links | Library | Lost Password | Email Changes |
Register | FAQ | Calendar | Today's Posts | Search |
|
Thread Tools | Search this Thread |
March 20, 2017, 08:49 PM | #1 |
Senior Member
Join Date: October 4, 2008
Location: WI
Posts: 3,656
|
Good torque wrench? Suggestions welcome
Is there any torque wrench I should look at before just getting one from my local hardware store? They've got a 5 to 80 pound that looks like it will do the job.
__________________
E-Shock rounds are engineered to expend maximum energy into soft targets, turning the density mass into an expanding rotational cone of NyTrilium matrix particles, causing neurological collapse to the central nervous system.- Yeah I can do that. I guarantee you will know it if a bicyclist hits your house going 1000 mph. -Smaug |
March 20, 2017, 10:58 PM | #2 |
Senior Member
Join Date: October 19, 2005
Location: Tx Panhandle Territory
Posts: 4,159
|
https://www.unclesamsretailoutlet.co...orq-p/5839.htm
https://www.unclesamsretailoutlet.co...nch-p/5895.htm I bought a CDI from Uncle Sam's Retail Outlet. Overkill? Maybe, but it's my understanding CDI makes the torque wrenches for Snap-On. The one I received had some dirt and stuff on the case, but the wrench still had the factory paper thing over the head.
__________________
Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day) I suspect a thing or two... because I've seen a thing or two. |
March 20, 2017, 11:52 PM | #3 |
Senior Member
Join Date: February 13, 2006
Location: Washington state
Posts: 15,248
|
For firearms applications, you are dealing with torques in inch-pounds, not foot pounds. A torque meter is a little bit overkill, just buy one of the FAT Wrencehs from Midway, quick, easy, neat.
__________________
Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services |
March 21, 2017, 02:11 AM | #4 |
Senior Member
Join Date: October 19, 2005
Location: Tx Panhandle Territory
Posts: 4,159
|
Good point Scorch, I was assuming he was wanting to put on AR barrel nuts.
__________________
Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day) I suspect a thing or two... because I've seen a thing or two. |
March 21, 2017, 10:17 AM | #5 |
Senior Member
Join Date: September 28, 2008
Posts: 10,442
|
Just as a side note, both Proto and Snapon, along with Mack, make superior tools.
My torque wrenches of those brands, acquired nearly 50 years ago, are still going strong and accurate whatever size and use is needed.
__________________
Walt Kelly, alias Pogo, sez: “Don't take life so serious, son, it ain't nohow permanent.” |
March 21, 2017, 02:36 PM | #6 |
Staff
Join Date: March 4, 2005
Location: Ohio
Posts: 21,063
|
Venom1956,
As you might guess from the responses, what you want to do with the wrench matters. Barrels? Then you want something with a maximum capable of 50 ft-lbs. If you want this for scope rings and action screws, something with 50 or 60 inch-lbs maximum range is appropriate. The FAT wrench comes with a calibration paper to show actual error at time of calibration. If you are making a career of this work, Start looking at Grainger or some other vendor of higher end tools as suggested above. For most applications in Gunsmithing the absolute accuracy isn't a stiff requirement and something that is good to within ±10% accuracy will generally do just fine.
__________________
Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle |
March 21, 2017, 04:51 PM | #7 |
Senior Member
Join Date: October 4, 2008
Location: WI
Posts: 3,656
|
Yeah ar barrels. For what i am asking. Im not sure if there is a benefit using a specific ar torque wrench or just any one will do.
I hadnt considered for scope mounting thats a good idea
__________________
E-Shock rounds are engineered to expend maximum energy into soft targets, turning the density mass into an expanding rotational cone of NyTrilium matrix particles, causing neurological collapse to the central nervous system.- Yeah I can do that. I guarantee you will know it if a bicyclist hits your house going 1000 mph. -Smaug |
March 21, 2017, 07:07 PM | #8 |
Senior Member
Join Date: January 24, 2011
Posts: 1,427
|
Intended use is important.
A 6-40 screw needs 12 in. lbs. steel on steel but 6.6 going into 2024 Aluminum. Also, you never use the bottom 20% of range as accuracy suffers too much. That's why some tools range from 20 - 100 and not 0 - 100. Your higher quality tools will exclude the bottom 20% from their range. To help keep your adjustable tool in tolerance, set it to the lowest setting before putting it away. |
April 25, 2017, 03:28 AM | #9 |
Senior Member
Join Date: April 14, 2017
Posts: 102
|
I'm not a gusmithhing expert. But as a certified technician, just my empty tool boxes worth $10,000.
Snap on has best torque wrench on the market. Digital settings, digital read out as you turn it. Inch or foot lbs with same tool. Dam things even vibrate like a video game controller when you reaching set torque. |
April 25, 2017, 06:17 AM | #10 | |
Senior Member
Join Date: October 20, 2016
Posts: 223
|
Quote:
Ever have them checked by a cal shop? Probably alot "less accurate" than you think if they have never seen a cal shop. Dont double click on the set value Set to 0 or lowest setting for storage. Upper and lower 20% shouldnt be used get a larger or smaller Torque wrench. And like every other tool we buy You get what you pay for as far as quality/accuracy. Sent from my iPhone using Tapatalk |
|
April 25, 2017, 12:16 PM | #11 |
Senior Member
Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,424
|
Snap-On wrenches are good, but overpriced and unnecessary for the intended use.
For AR barrel nuts, Harbor Freight should be good enough. Yea, they're cheap. But they've also been tested by quite a few different organizations and people, and been shown to be as accurate and repeatable as Craftsman and 'basic' Snap-On torque wrenches. They do get impacted more by the spring relaxing if left set at a high torque setting for storage, but if you don't store at a high torque setting, it doesn't really matter (and it shouldn't be done with any torque wrench). Texas45 makes a good point, too. If a torque wrench isn't recalibrated periodically, it doesn't matter how good it was to start with. When I was still working on the flightline, we went through torque wrenches like candy -- nearly all Snap-On. One drop, even inside the plastic case, and a torque wrench has to be considered bad (legitimately -- I saw them off by as much as 20% from a 4 foot drop). Even just normal use - four to twelve bolts, one or two times a day, at 30-70% of rated value - usually had them off by 3-5% at our mandated yearly recalibration, sometimes they were off by 10-15% or had big problems with repeatability. If you need accuracy, you need regular calibration.
__________________
Don't even try it. It's even worse than the internet would lead you to believe. |
April 30, 2017, 11:06 PM | #12 |
Senior Member
Join Date: April 14, 2017
Posts: 102
|
Harbor freight, lmao.
Have fun busting knuckles with that junk. |
May 1, 2017, 12:03 PM | #13 |
Senior Member
Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,424
|
I suppose a "$10,000 tool box" is also necessary for a simple barrel nut that has a maximum torque more than 100% greater than the minimum torque?...
__________________
Don't even try it. It's even worse than the internet would lead you to believe. |
May 1, 2017, 01:32 PM | #14 |
Senior Member
Join Date: November 13, 2006
Posts: 8,286
|
FWIW I have a 3/8 and a 1/2 in Snap-on.And,when I was still working in an environment where tools were calibrated regularly,I had my torque wrenches calibrated with the rest of my precision tools.
That's all well and good, But for some jobs we use a stack of Jo blocks ,and a comparator when the tolerance range is .0002 in. Or if we are working on aircraft that may fall from the sky. Cutting cordwood for the stove with a chainsaw is done with less sophisticated tools. An AR barrel nut ? I don't recall the exact spec,but its something like "Grease with moly,torque to 20 or 25 or? 28 ? ft lbs,then increase torque to align the gas tube hole...up to a max of 60 ft lbs? That's probably a bit wrong,its been awhile. Point being,from 25? ft lbs,there is a+35 ft lb tolerance range. It could be done with the "calibrated white knuckle scale" Or "Start with sparkplug tight and stop before lug nut tight." No,thats not my recommendation. But for the intended purpose, a pawn shop used beam type Craftsman 3/8 torque wrench with a 1/2 in adapter will keep the "white knuckle" calibration honest.Or a Harbor Freight. That said,if I am going to buy a torque wrench(I could use a 1/4") I'll get a reasonable quality brand,likely a used Snap-On with a recent cal sticker.Whatever E-bay has to offer. This from a guy who has to evaluate a builder 22R Toyota motor...so I bought a 2 in to 6 in Peacock bore gage that measures .0001 and a ring gauge I found that is at the spec'd max to the .0001 for standard size bore! But now I can measure I.D's better than I could with a telescope gage and a mic. A person might choose to buy a $300 + torque wrench when its time to buy a torque wrench,but a $30 torque wrench is adequate for an AR barrel nut. |
May 1, 2017, 01:47 PM | #15 |
Senior Member
Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,424
|
HiBC, standard torque spec, using the G.I. adapter and a standard barrel nut, is 35-80 ft-lb.
Some aftermarket manufacturers recommend other torque specs, and some tools (like mine) require recalculating the torque setting, due to different length and orientation. A few manufacturers actually use the "beyond spark plug tight, but shy of lug nut tight" concept you mentioned. Something like: "Thread nut on until it stops sharply. Tighten until gas tube will pass without interference. If alignment can't be achieved without substantial force, shims or receiver facing may be required..."
__________________
Don't even try it. It's even worse than the internet would lead you to believe. |
May 1, 2017, 05:49 PM | #16 |
Senior Member
Join Date: September 28, 2008
Posts: 10,442
|
Torque wrench?
Don't need no danged torque wrench. Butt pucker technique all the way. But seriously, The choice of bolts, nuts, washers, and lube can be as important as calibration.
__________________
Walt Kelly, alias Pogo, sez: “Don't take life so serious, son, it ain't nohow permanent.” |
May 3, 2017, 06:38 PM | #17 |
Senior Member
Join Date: August 1, 2010
Location: Tampa Bay
Posts: 4,556
|
Torque "accuracy" here isn't critical...a HF wrench will get you close enough.
35 ft/lbs. to start- then the next notch to line up the gas tube. Should still be below 80 ft/lbs or so. Tighten/loosen with a breaker bar a few times to eliminate any irregularities. Finally check alignment with the gas tube tool (bought or made), be sure there's no contact with the tube and the scallop. If needed, no harm is some careful dremel work on the edge of a scallop to relieve contact.
__________________
Remington 700/Savage Rebarreling /Action Blueprinting 07 FFL /Mosin-Nagant Custom Shop/Bent Bolts Genuine Cerakote Applicator www.biggorillagunworks.com |
May 4, 2017, 09:26 AM | #18 |
Senior Member
Join Date: May 15, 2012
Location: Texas
Posts: 2,566
|
I just use my hand, stop just before it breaks or strips
|
|
|