Helicoil jam on screw
Helicoil jam on screw
(OP)
Having problem with screw jam when installing into helicoil and cannot be turn anymore.
When I force the jammed screw out, the helicoil will be remove from its insert thread.
Here are the spec
Screw: .190-32 UNJF-3A Perfect Thread
Helicoil: .190-32 Fine Thread
Helicoil Insert Thread: .190-32 UNF-3B
When I force the jammed screw out, the helicoil will be remove from its insert thread.
Here are the spec
Screw: .190-32 UNJF-3A Perfect Thread
Helicoil: .190-32 Fine Thread
Helicoil Insert Thread: .190-32 UNF-3B





RE: Helicoil jam on screw
does it jam immediately (as the screw starts to engage the heli-coil) or later ?
RE: Helicoil jam on screw
RE: Helicoil jam on screw
What is the screw material?
Ted
RE: Helicoil jam on screw
Screw is of 15-5 stainless steel
The helicoil is also coated with dry film lube, could the build up from the dry film cause the problem too?
RE: Helicoil jam on screw
!! should be 35, T1 or 11 depending on type
? should be N or blank
### is the length
RE: Helicoil jam on screw
Tunalover
RE: Helicoil jam on screw
Ted
RE: Helicoil jam on screw
From this site -
http://www.ring-plug-thread-gages.com/ti-UNJ-vs-UN...
UN Bolt into UN Nut = No problems.
UNJ Bolt into UNJ Nut = No problems.
UN Bolt into UNJ Nut = No assembly problems. Functional problems are possible.*
UNJ Bolt into UN Nut = In most cases an interference fit at the thread minor diameter. Functional problems are also possible.*
RE: Helicoil jam on screw
Why don't you call up the Helicoil Corp and get the answer.
Since they have been in business at least 70 years maybe they know a little bit about their product and perhaps can help you
better.