Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

torque wrench for BB

Old 06-06-10, 01:03 PM
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dnfcx
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torque wrench for BB

can anybody suggest a good cheap torque wrench for BB work? I have an older one, but it only goes 1 way. And since BBs need a two way torque wrench - mine is about 50% useless.

I have a smaller one (the shimano pro set) for small work

thank you
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Old 06-06-10, 01:13 PM
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Daytrip
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I have the Park. Works and cost about $75, I think.
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Old 06-06-10, 01:33 PM
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JaceK
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Sears Craftsman... good price, lifetime no questions warranty... < 100$ for a decent one.
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Old 06-06-10, 01:46 PM
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Originally Posted by JaceK View Post
Sears Craftsman... good price, lifetime no questions warranty... < 100$ for a decent one.
Yea, more like $30 for a craftsman beam type. That's what I used for my BB.
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Old 06-06-10, 07:56 PM
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I would go with the beam type also. I'm not sure that Sears gives the warranty on the torque wrenches anymore.
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Old 06-06-10, 09:19 PM
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Considering some shops don't use a torque wrench, just an "educated" arm, I would take the least expensive way out, the $30 option sounds good. I've got a very expensive ratchet style torque wrench from my mis-spent youth, working on cars. I'm sure it's way out of calibration, but it's close enough.
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Old 06-06-10, 09:35 PM
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Torque rating on a BB is 650 NM. Which means, as tight at you can get the thing

Essentially, if the wrench still moves, then its not tight enough
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Old 06-07-10, 01:58 AM
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Originally Posted by nitropowered View Post
Torque rating on a BB is 650 NM. Which means, as tight at you can get the thing

Essentially, if the wrench still moves, then its not tight enough
my bb's tend to be in the 35-50 Nm range, 650 Nm is A LOT of torque. Do you mean Inch lb?
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Old 06-07-10, 06:22 AM
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Oops you got me, yeah I ment in-lbs
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Old 06-07-10, 06:25 AM
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is it possible to over tighten a bb cup?
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Old 06-07-10, 06:58 AM
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I think if you put in a huge 6ft cheater bar you could strip the BB threads but I would say in most cases no
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Old 06-07-10, 07:04 AM
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Originally Posted by nitropowered View Post
Oops you got me, yeah I ment in-lbs
I don't think that's right either. Everytime I've looked up a BB torque it has been in the 30 to 35 lb/ft range. Imagine a 30 to 35 lb weight hanging off the end of a foot long wrench. Tighten it that much.
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Old 06-07-10, 07:10 AM
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Originally Posted by JaceK View Post
Sears Craftsman... good price, lifetime no questions warranty... < 100$ for a decent one.
They don't have lifetime warranty. I think it's only a year or two. Torque wrenches wear out their calibrations over time; there's nothing one can do about that.
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Old 06-07-10, 07:23 AM
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Originally Posted by Retro Grouch View Post
I don't think that's right either. Everytime I've looked up a BB torque it has been in the 30 to 35 lb/ft range. Imagine a 30 to 35 lb weight hanging off the end of a foot long wrench. Tighten it that much.
that is a very tight specification. i think if the average person just gives it a good hard push with body weight, it would be ok.
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