Sprue washer?

[Mike W1]

Maybe dumb question but is the washer on a Lyman mould a SPRING washer as they refer to it or is it a belleville washer? Or is there any difference between the 2 types other than their name?

 

[KeithB]

Don’t know what Lyman use now but they used to use a split washer (almost like a lock washer) that had sharp edges that will dig into the underside of the pivot screw head and the bottom of the sprue plate. I used to file them off but now I just replace them with stainless steel flat washers. A Belleville spring looks like a cup stamped from sheet metal. Much better if that’s the way you want to go.

 

[fiver]

I think they use a wave washer now.
someone does anyway, the wave washers allow you to put tension on the plate and lock the screw in place.
I like the idea.
Magma uses a through bolt with a lock nut and a spring that system gets locked in place and never moves and is pretty ingenious as it allows the plate to also cam up off the mold slightly when the mold is opened in the machine.
pretty ingenious.

 

[Mike W1]

At least on the DC they use a SPRING WASHER (per Lyman new booklet). Definitely not a wave washer.
Only questions being whether a spring washer is the same exact item as a belleville!

 

[KeithB]

I think Belleville is like Crescent, a product identified with a brand name. I looked at Lyman's website and what they have pictured looks like a cup or Belleville type washer for sure. They're all just sheet metal stamped into a cup, or arch, or waves.

 

[JonB]

within the last month, I ordered a few replacement sprue plates from Red River Rick (KAL tool and die), the plates for Lyman molds come with a new washer, it is the split washer/spring washer type.

 

[KeithB]

At times like this a picture would be really helpful.

 

[Mike W1]

And obviously I'm no gifted photographer. One on left is Lyman #2990202 Spring washer and it will rest flat on a flat surface. One on right is a Wave washer and it will not rest flat on a flat surface, only a couple of contact points to the surface.

 

[freebullet]

I've bent a couple washers in a pinch. Just need that lilbit o tension. Pound one around a small socket with a vice holding one end.