×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

This is about Electrical terminal S

This is about Electrical terminal S

This is about Electrical terminal S

(OP)
This is about Electrical terminal Screws like for instance Harting connectors that use a 2.5 mm cable to insert into a terminal with a 3mm fixing screw.
The tightening torque recomended for the terminal with wire protection is 0.5Nm.
But can anyone tell me what would be a norm for untightening the screw to fit the cable in the first place. some screws seem very tight to unscrew so that a recomended 0.5Nm tightening torque would be way out.

RE: This is about Electrical terminal S

I twist until the screw either lets loose or strips... any info beyond this is irrelevant to me.

Dan - Owner
http://www.Hi-TecDesigns.com

RE: This is about Electrical terminal S

(OP)
Somehow i dont think that it answers the question on a norm for screw tightness.
But thanks anyway Mac Gyver.

RE: This is about Electrical terminal S

I'll try re-wording McGyverS2000's statement, which is a good one. There is no "norm" for un-tightening torque of a terminal screw when it's new from the factory, hence there is no need for anyone to have ever made note of it. It depends on the tolerances to which the screw and terminal were made, corrosion, dirt, materials, temperature, etc...

Tightening torque is all that's important.

Good on ya,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

RE: This is about Electrical terminal S

You might want to tackle this problem the other way - put a torque wrench on the terminal and see if it tightens (i.e. rotates) with less than your specified tightening torque; if it does then you have a problem (incompatible materials, wrong spec for the environment, etc.). You should need to apply more torque than the spec to move the screw; just be careful you don't over torque the terminal and damage it.

Z

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources