PDA

View Full Version : Lyman thread size



Sailormilan2
04-09-2018, 06:56 PM
Does anyone know the thread size on the threaded pins that hold the Lyman mold blocks to the handles? Diameter appears to be about 7/32".
I need to chase one that has a couple of messed up threads.

shortlegs
04-09-2018, 11:15 PM
Just checked and it 8 x 32 on new and old molds.

Sailormilan2
04-09-2018, 11:58 PM
Thanks

Ed_Shot
04-10-2018, 08:15 AM
I bet if you call Lyman customer service they'll send you a pair for free.

Sailormilan2
04-10-2018, 10:04 AM
Well, I posted here first because I thought I would get a quicker answer. I did contact Lyman, and the proper size for a 4 cavity mold is a 12-24. The 8-32 mentioned by "shortlegs" is for the one and two cavity. At least according to Lyman. I didn't realize that Lyman used two different thread sizes for their molds, otherwise I would have specified which mold size I have.
Fortunately, I have the proper tap and die, so chased both threads, and now the screw works.
Lyman doesn't list the screws as a seperate part(at least, not that I saw), though they are available as part of a rebuild kit. I did get a rebuild kit, since 3 of my 4 cavity molds are about 35+ years old. They are probably due for some parts replacement.
I just hate throwing parts away that are salvageable with a little effort.