Pull scale for measuring frictional force
#1
Pull scale for measuring frictional force
I'm installing new front wheel bearings and I need a "pull scale" to measure the frictional force (9-9 in the S4 FSM). Is that the same thing as a spring scale? Such as the one seen here: http://www.americanweigh.com/product...roducts_id=709
Also, it says
Does anyone know the frictional force? I'm wondering so I can get a scale that measures the proper interval.
And finally, anyone know where to buy one local? (e.g. chain stores)
Also, it says
Preload: Frictional force plus
3.9~9.8N (.4~1.0kg, .9~2.2lb)
3.9~9.8N (.4~1.0kg, .9~2.2lb)
And finally, anyone know where to buy one local? (e.g. chain stores)
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#8
Eats, Sleeps, Dreams Rotary
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Nothing vague about the answer. If the washer binds, then the nut is too tight. That's how it's done at the dealerships/garages. Do you actually believe that the mechanics take time and us a pull scale on each car to do the front wheel bearing adjustments?
#9
I'd still rather do it the right way.
#10
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One of my automotive instructors ( Who grew up at, and still works with, his family's local shop that has an excellent reputation) taught me to do it this way:
1) Tighten the nut until there is no play left in the bearing assembly; not tight, just so that there is no play.
2) back the nut off from that position one "flat"
3) put the wrench to 90ish degrees (not moving the nut from the backed-off position) and let go. The weight of the wrench will put the light preload on.
If you think about it, this really works because the weight of the wrench is the only force being applied to torque the nut. His family's shop has been doing this forever, and knowing this guy, I doubt he would teach us this if he knew it was wrong or half-assed.
1) Tighten the nut until there is no play left in the bearing assembly; not tight, just so that there is no play.
2) back the nut off from that position one "flat"
3) put the wrench to 90ish degrees (not moving the nut from the backed-off position) and let go. The weight of the wrench will put the light preload on.
If you think about it, this really works because the weight of the wrench is the only force being applied to torque the nut. His family's shop has been doing this forever, and knowing this guy, I doubt he would teach us this if he knew it was wrong or half-assed.
#12
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I assume he means one side of the retaining nut. You're over-worried about this, just get it to take the slack out with a very light pre-load, just until you feel slight resistance. I've done it this way on hundreds of bearings as a mechanic, and I do "give a ****"
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Jeff20B
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09-16-18 07:16 PM