Bolt Torque 1

[pantheist]

I understand that Purpose of tightening the screws/Bolts are to fix Axial tension of the Object.
However, I need a better explanation which allow me to know about it in Depth and how to find out Bolt torque as well.

Can anyone assist me in this regard?

 

[desertfox]

Hi

Try this

http://www.unbrako.com/docs/engguide.pdf

 

[rb1957]

look into the FAQs ... there are many threads on bolt torques

Quando Omni Flunkus Moritati

 

[CoryPad]

The Unbrako engineering guide is a good reference, as is the Kamax Bolt and Screw Compendium:

http://www.kamax.com/fileadmin/user_upload/dokumente/pdf/Bolt_and_Screw_Compendium.pdf

Other good references are in FAQ725-600, some free and some for purchase.

 

[pantheist]

Hi All,

Thanks for the interest shown on this query.,
Let me try the link, It seems to be vague.,

 

[PersonalProfile]

Assuming you are referring to "structural / heavy industry" applications (cf. say aerospace etc) this is one of the better publicly available resources that I have found:

http://www.cisc-icca.ca/files/publications/techpubs/design/bolting/highstrengthbolting.pdf

Subject to the earlier assumption, you will find the torque of the fastener is generally not a criterion of consideration.

I propose although this is a good start, it is not exhaustive (and may not reflect your local requirements etc) and hence you should consult your relevant local resources etc as required.

Regards,
Lyle

 

[Tmoose]

Do you "know" the (axial) forces your bolted joint will be subjected to?

Have you looked into possibilities of bolted "flange" features creating a prying action in addition to simple tension?

 

[pantheist]

Hi All,

Thanks for your response, I am just looking for an understanding and not into any technical applications.

 

[ricklts]

Sundarzplanet,

Take a look at either Lamon's or Flexitallic's Bolted Joint/Gasket Handbooks. They are full of good information about bolt loadings.

Rick

 

[qualeng1]

You may also want to look into ASME PCC-1, which provides torque and fit-up suggestions.

 

[pantheist]

Thanks ricklts & qualeng1 for your suggestions, I will try.,