Looking for torques values for steel into fiberglaass
Looking for torques values for steel into fiberglaass
(OP)
Have project which has SS ports being threaded into fiberglass and am looking for a way to figure torques for threads not to strip out.





RE: Looking for torques values for steel into fiberglaass
Isn't this usually resolved by buying/fabricating a load spreading part that would be bonded/assembled to the back side with resin/mat? This part, I guess would be threaded st. stl. or w.h.y.
"The ideal client is one possessed of great good sense and perfect judgement;
that is to say, one who agrees entirely with the designer at all times and in every respect."
Fenwick Williams, Naval Architect.
RE: Looking for torques values for steel into fiberglaass
pj
RE: Looking for torques values for steel into fiberglaass
RE: Looking for torques values for steel into fiberglaass
http://www.harringtonplastics.com/
http://www.mcmaster.com/
The following info is from the McMaster-Carr online catalog:
Fiberglass—Made of urethane resin. It’s nonconductive,
flame retardant, and is resistant to mild acids, solvents, and saltwater. Working temp.: up to 212° F. Minimum Rockwell
hardness: R119. Minimum tensile strength: 27,000 psi. Strength is greater than Nylon 6/6.
http://www.mcmaster.com/
Nut materials on p. 2961, fiberglass nuts on p. 2965.
Gray
Fiberglass
Screw Qty. Per Pkg..
1/4_-20. . .. . . 10. . . .91395A029. . . . $6.13
5/16_-18 . . . . 10. . . .91395A030. . . . 6.13
3/8_-16. . . . . 10. . . .91395A031. . . . 6.13
1/2_-13. . . .. . 10. . . .91395A033. . . . 8.74
5/8_-11. . .. . . 5. . . .91395A035. . . . 6.90
3/4_-10. . .. . . 5. . . .91395A036. . . . 8.60
7/8_-9 . . . . -- . . .------------- . . ---- .
1_-8. . . . . . . 1. . . .91395A038. . . . 2.26
I think the Harrington Plastics Engineering book (not the catalog) gives torques for various sizes of fiberglass nut & bolt combinations, but of course, your material may differ.
RE: Looking for torques values for steel into fiberglaass
I'd be happy to help if I knew more....