What class thread for screw actuator? 1

[KirbyWan]

Howdy all,

I'm reverse engineering a screw actuator used to open and close a small vent door on a air conditioning vent louver. The thread is a 1/4-20 3 start thread with an aluminum stud and a steel trunion nut. I'm going to need to order a tap and die set to cut these and I was wondering if I should loosen the class from 2A and 2B to 1A and 1B so that it can turn more freely even if it gets dust and dirt in it. Is this a good idea or not?

Thanks,

-Kirby

Kirby Wilkerson

Remember, first define the problem, then solve it.

 

[MikeHalloran]

Only if you're planning to apply a coating with a net dimensional buildup to the aluminum.



Mike Halloran
Pembroke Pines, FL, USA

 

[KirbyWan]

No, I was thinking that I wanted more slop in the joint since this was an actuator and not a fastener. I'll order my tap and die set as a 2A and 2B

Kirby Wilkerson

Remember, first define the problem, then solve it.