| Author | Message | ||
     Bomber |
the WRENCH, I already know all about those lines at the corner of my eyes! question is, when torquinig a fastener, what multiplier should be used when using a crowsfoot wrench (socket seems a little of a misnomer) and torque wrench, both when the torque is called out in the manual, and when it's called out in the manual specifically using a crowsfoot? | ||
| Pangalactic |
If the crowsfoot is attached to the wrench at a 90 degree angle to the bar, there is no multiplier- the length is the same as if it were a regular socket. As far as if it specifically calls for the crows foot, I would assume it also means at a 90 degree. If the crowsfoot is applied linearly, you would use the attachment formula- which I have convenviently forgotten...  | ||
| Reepicheep |
Torque is simply linear, longer wrenches give more torque. So divide the old wrench length by the new wrench length (with the crows foot). That should give you a number like .89 or something. Multiply that times the torque value given, and thats what you want to set the wrench for. Or it will be close enough anyway. | ||
| Bomber |
Pan (got any pipes?) (never mind ;-} ) thanks for the answer -- I spose the effective length of the torque wrench is not altered by much of the crow's foot is attached at 90 degrees (fractions of a inch, I'm guessing) so your answer makes good sense -- thanks again for the backup! | ||
| Mikej |
You need this book. Lots of good stuff in it. Older copies are around and still functionally viable. My older copy is home in a box someplace. Enlightened erudition in the entropy lab. http://www.industrialpress.com/en/mh.asp http://www.industrialpress.com/handbook/index/index25.htm#T These may or may not help any, from a quick search: http://users.pandora.be/miata/english/suspension/torquesettings.htm http://www.ferrarichat.com/partsandservice/Robert_Schermerhorn/technical_referen ce_books_i_keep.htm | ||
| Loki |
The next question: When was the last time you had the torque wrench calibration checked? Not trying to be funny or pick a fight here. I am trained in the mysterious art of checking and properly adjusting these tools. Which reminds me, mine are due for recertification. I could tell you some good stories of doing some. -how about the 190lb tech trying to get a 750ft lb break point check done by hand. CW was easy, had the proper tools to do it. CCW was a whole different tale. | ||
| Bomber |
Trickster -- not nearly recently enough is the answer . . . . . . Mike -- another book? the last time we moved the quote from the vendor was broken down three ways . . . . Everything, $X Everything minus the shop (lathe, mill, rollcabs, parts and other flotsam), $X-15% Everything (including the shop) minus the household library, $X - 18% I move the shop, didn't have the gumtion to move the books ;-} thanks for the tip | ||
| Fly |
Bomber, see this site for reference. It covers formula to accommodate for extensions, off-sets, etc. http://www.torqwrench.com/Info/FAQ.html | ||
| Bomber |
Brer Fly thanks for the tip! I LOVE this place . . . .all this good data atcher fingertips! | ||
| Mr_grumpy |
Hey Bomber, just to help with the spelling,  Wrench  Wench Hope this helps,  | ||
| Bomber |
grump Thanks, sir! Learning is Living! Now I know why those fasteners kept loosening up! | ||
| Cyclone8u |
E = Length of extension (ie crowsfoot) from center of fastener to center of torque wrench head. L = Length of torque wrench from center of wrench head to center of grip. Tw = Torque set on wrench Te = Torque applied to fastener Tw = Te(L/L+E) Te = Tw(L+E/L) Looks like problem could be simplified, but it's been a long time since algebra class and I have Stone Imperial Stout calling me from the other room...Cheers! -John | ||
| Cyclone8u |
Oops, didn't see Fly's post...good link. Bottoms up - John | ||
| Bomber |
John thanks for the verification of data . . .always a good thing . . .btw, I fired up your profile, just for grins, and my first that was, jeez, this guy's GORGEOUS! | ||
| Dasxb9s |
Day late... and a dollar short!!! The day before this thread popped up, my son and I scrambled for this info. It seemed I had two choices, pull the engine on the Yamaha race bike (our newly acquired project) to torque the rear outer cam/valve cover bolts (the pesky frame was in the way) or use a crows foot on the torque wrench. Thank god my son is good at math, and I had not tossed the pamphlet that came with my torque wrench (and I could actually find it) that had the formula! I am still happy to see all this info, I have tagged some of the web links and have print outs under my torque wrenches as references. Thanks all for the info!! I love the badweb!!! | ||
| Cyclone8u |
Ha! Thanks Bomber. Hey, who wants to look at my mug anyway. I figure that photo is much easier on the eyes... -John |
