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Buell Forum » Old School Buell » Archive through November 27, 2008 » Head torque values incorrect? « Previous Next »

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Archive through November 15, 2008Preybird130 11-15-08  02:15 am
Archive through November 11, 2008Jos5170030 11-11-08  04:50 pm
Archive through November 09, 2008Ducxl30 11-09-08  10:41 am
         

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Jstfrfun
Posted on Saturday, November 15, 2008 - 10:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The longer the extention the more torque loss.


Lets all pray the world dosen't end over this!
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Jstfrfun
Posted on Saturday, November 15, 2008 - 10:45 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The longer the extension the more torque loss.


Lets all pray the world dosen't end over this!
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Jos51700
Posted on Saturday, November 15, 2008 - 11:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hey, I never said I was ALWAYS right! (Just mostly ; ) )
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Buellistic
Posted on Saturday, November 15, 2008 - 11:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

THE BASICS OF TORQUE

Torque is the twisting movement which pro-duces rotation about an axis. It is the product of force(F) times the distance(D) from the axis of rotation to the point where the force(F) is applied.

Torque(T) = Force(F) X Distance(D)

If (D)is measured in inches and (F) in pounds(lbs.), (T) is expressed in inch-pounds(in.lbs.).

If (D) is measured in feet and (F) in pounds(lbs.), (T) is expressed in foot-pounds(ft.lbs.).

If (D) is measured in meters and (F) in Newtons(N), (T) is expressed in Newton-Meters(N-m).

Force(F) on the wrench handle in the direction to tighten(torque) will produce clockwise(unless left handed thread) torque(T) on the bolt/nut. To produce a given amount of torque, more force must be applied as the distance from the bolt/nut is reduced.
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Blake
Posted on Saturday, November 15, 2008 - 02:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Jos,

I always learn a LOT more being wrong.

For a really fun brain stretching exercise, try to figure what happens to bolt load in a tension connection as the connection is loaded in tension, meaning if you have a tension connection, like for instance a bolted pipe flange connection, and you torque the bolts/nuts to preload them, then you pull on the pipes to put the bolted joint in tenstion, what happens to the tension load in the bolts and by how much?

Here's a pic to help illustrate what I'm asking...


Bolt Load Versus Joint Tension
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Buellistic
Posted on Saturday, November 15, 2008 - 03:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Going riding on my BUELL S3T !!!
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Preybird1
Posted on Saturday, November 15, 2008 - 04:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Dam its nice here to i could ride but im working.

Be careful!
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Blake
Posted on Saturday, November 15, 2008 - 04:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)


Bolt Tension = ?
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Scott_in_nh
Posted on Saturday, November 15, 2008 - 05:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok, I'll bite.

The bolt tension is 1500 lbs.
The clamping force is 500 lbs.
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Buellistic
Posted on Saturday, November 15, 2008 - 05:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Bolt Tension: 1K lbs.

Clamping Force: 1K lbs.
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Bad_karma
Posted on Sunday, November 16, 2008 - 12:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Zero
Zero
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Jos51700
Posted on Sunday, November 16, 2008 - 12:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Second Karma.
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Bud
Posted on Sunday, November 16, 2008 - 01:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

bolt 1000
clamp 0

and my head hurts... that was way back

something about bolts should be seen as springs,
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