40 Nm Without A Torque Wrench - Bike Forums

Bike Forums > Bike Forums > Bicycle Mechanics > 40 Nm without a torque wrench Username Remember Me? Password By logging into your account, you agree to our Terms of Use and Privacy Policy, and to the use of cookies as described therein. Register Forgot Password? Register FAQ Calendar Today's Posts Search Vendor Directory Notices Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance. Search Forums Show Threads Show Posts Advanced Search Find All Liked Posts Go to Page... 40 Nm without a torque wrench Reply Subscribe Thread Tools Search this Thread 04-28-18 | 01:51 PM #1 Semipedersen Thread Starter Senior Member Joined: Apr 2017 Posts: 126 Likes: 1 40 Nm without a torque wrench Hi, another beginner question. I bought the Abus Nutfix wheel locking system today. It says in the instructions that I should tighten it with 40 Nm. I cannot use my torque wrench because of the design of the Abus Nutfix. Is there an easy way to tighten something to 40 Nm with an open—end wrench? Reply 0 0 Semipedersen View Public Profile Find More Posts by Semipedersen View iTrader Profile 04-28-18 | 02:36 PM #2 kyumin2lee Junior Member Joined: Apr 2018 Posts: 11 Likes: 0 40Nm means a moment of 40N - equal to around 4kg, at a distance 1 meter from the pivot. You could get place a 4kg weight on a 1m bar. You can scale it down - so 8kg on a 50cm spanner, 16kg on a 25cm spanner, 32 kg on a 12.5cm spanner and so on. But realistically, 40Nm to me is 'pretty damn hard'. I'm sure the locking mechanism or the axle isn't particularly sensitive to the proper torque, you just don't want your wheels falling out of the dropouts mid ride. Reply 0 0 kyumin2lee View Public Profile Find More Posts by kyumin2lee View iTrader Profile 04-28-18 | 02:52 PM #3 fietsbob Banned Joined: Jun 2010 Posts: 43,587 Likes: 1,376 From: NW,Oregon Coast Bikes: 8 A having a torque wrench a couple uses can give you a feel for what that is like, then thereafter, you may not need it as much. have something else you can use a torque wrench on, to rehearse the feel of how tight that is? https://www.abus.com/eng/Mobile-Secu.../NutFix/NutFix there are 'Crows foot' bits to use on a torque wrench that are open end , with a square socket bit hole Last edited by fietsbob; 04-28-18 at 02:57 PM. Reply 0 0 fietsbob View Public Profile Find More Posts by fietsbob View iTrader Profile 04-28-18 | 02:52 PM #4 RGMN Senior Member Joined: Feb 2018 Posts: 595 Likes: 251 Quote: Originally Posted by kyumin2lee But realistically, 40Nm to me is 'pretty damn hard'. I'm sure the locking mechanism or the axle isn't particularly sensitive to the proper torque, you just don't want your wheels falling out of the dropouts mid ride. That's barely 30 lb.ft, not even close to pretty damn hard. More like almost moderately tight. To the OP, take a nut & bolt that use the same size wrench as the Abus Nutfix, torque it with the torque wrench to 40 Nm, and then take the wrench and see how tight it feels. Then try tightening the nut & bolt with the wrench and check if you hit 40 Nm. It will take a few tries but you should be able to get fairly close after you "calibrate" your arm. Then tighten the Abus Nutfix. Alternately, you could get an appropriately sized crows foot and torque it with that. Reply 0 0 RGMN View Public Profile Find More Posts by RGMN View iTrader Profile 04-28-18 | 03:09 PM #5 Semipedersen Thread Starter Senior Member Joined: Apr 2017 Posts: 126 Likes: 1 Crows foot you guys are great! I will get one next week. Never knew that something like that exists. Thanks for the help. I need more tools. Reply 0 0 Semipedersen View Public Profile Find More Posts by Semipedersen View iTrader Profile 04-28-18 | 03:23 PM #6 Ol Danl Full Member Joined: Dec 2004 Posts: 310 Likes: 26 From: Chattanooga, Tn Bikes: 1977 Raleigh Record, 1987 Schwinn Prelude, 1971 Raleigh Record, 1988 Schwinn Traveler, 1967 (?) Carlton Super Course, 1959 Huffy Sportsman 3 speed, 1972 Raleigh Super Course, yet another 70-something Raleigh Record We use torque wrenches at times in my craft, and our training has us make sure a crow's foot is at 90 degrees to the handle to get the torque value right. Reply 0 0 Ol Danl View Public Profile Find More Posts by Ol Danl View iTrader Profile 04-29-18 | 04:01 PM #7 WizardOfBoz Generally bewildered Joined: Aug 2015 Posts: 3,038 Likes: 344 From: Eastern PA, USA Bikes: 2014 Trek Domane 6.9, 1999 LeMond Zurich, 1978 Schwinn Superior Ol Danl is right: use the crow's foot at 90° (see drawing). If you must used the crow's foot at 0°, you can do it, but lower the click-setting torque you set on the wrench by a factor of L/(E+L). Reply 0 0 WizardOfBoz View Public Profile Find More Posts by WizardOfBoz View iTrader Profile Reply Subscribe Related Topics Thread Thread Starter Forum Replies Last Post Torque wrench advice WGB Bicycle Mechanics 19 09-25-19 03:05 PM Torque wrench miscalibrated? maartendc Bicycle Mechanics 15 02-09-18 08:38 AM Best do it all (packable) Torque wrench skids929 General Cycling Discussion 22 04-26-17 01:30 PM Dropped Torque Wrench soom Bicycle Mechanics 15 03-15-16 09:25 AM Do you need to use torque wrench? Foilnz Bicycle Mechanics 9 11-18-14 01:52 PM Back to Subforum Bicycle Mechanics View Next Unread Cheap brake lever - cheap repair? 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