Bolts,torques,grades etc 1

[elpa02]

Hi everyone,

It would be strongly appreciated if someone can help me. Maybe it's a piece of cake but i'm struggling.

-How or where can i find table regarding the strength grades related to the dimension bolts(M10...M).On line maybe?
-What percentage of the applied torque on a bolt(measured with a torque wrench) goes to friction.
-I'm trying to calculate the following.
There is a small pipe threaded at both ends.At the one end is installed a manometer.At the other there is a bolt.The pipe is filled with oil .As the bolt is bolting the pressure of the oil should be increased.How can i relate the torque applied on the bolt with the pressure indication of the manonmeter at the other end?

Thanks in advance.

 

[CoryPad]

To answer the first question, try this site:

http://euler9.tripod.com/fasteners/

For the second question, it is 80-90% (~ 50% at the bearing surface, ~ 40% along the thread surfaces).

For the third question, I would think you should relate the pressure to the internal volume. As you rotate the fastener one revolution (2*pi radians, 360 degrees), you advance the fastener one pitch length. Use this to calculate a volume change, and hence a pressure change. Thus, you remove any friction dependence.

 

[vonlueke]

For the bolt grades and dimensions, try

http://euler9.tripod.com/bolt-database/

.

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