Sprue plate stop

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  • Last Post 18 November 2018
BigMan54 posted this 17 November 2018

Did some casting today with a pair of older LYMAN 4cav molds. For some reason the stop plate screw on both molds loosened up. I tried to tighten them down, but they continued down into the bolt block. The threaded part is smaller then the unthreaded upper shaft. When you tighten it down it just goes down into the block,  too deep to allow the sprue plate to "latch" under the screw head. Never had one loosen like this before. 

I bought both these molds used, quite a while ago. One is a #454190, they are so old that the sprue plate pivot screws are slotted. But I think it's time to change over to Allen head. 

Could I clean these screw holes & screw of any possible oil or Lube and use Blue thread locker to tighen these stop screws ?.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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Ross Smith posted this 17 November 2018

I'd try red myself. It withstands heat better.

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frnkeore posted this 17 November 2018

You have to realize that the way that you get Loctite to release is heat.

Frank

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rhbrink posted this 17 November 2018

There is a high temperture copper gasket sealer available at auto parts stores that might work I have used it on  mold handles that were loose and seems to work well for that application.

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corerftech posted this 17 November 2018

drill and tap a perpendicular screw hole and install a set screw.

If you cant do it due to tooling lack, find a friend and buy him lunch.

Not difficult even if all you have is a power hand drill, drill index with a few bits, a bench vice and a tap.

Doesnt have to be class 5 fitment, just the set screw even poorly installed with bind the problem screw.

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BigMan54 posted this 17 November 2018

I'll look into the gasket sealer.

corerftech,

I have a small drill, drills, a tap set and a vice for the press. Only time I ever used a tap was, one time I used a tap to remove a stuck case.

So please school me. What is a drill index ? What type of drill do I need ?

I Am Not Handy, never have been, and I worry about my arthritis. I don't wanna mess up these good old molds. They are from the days when LYMAN still had Men running the Company that understood the concept of turning out a quality product.

I don't have handy friends either. Two old Doctors & a History Teacher. All the rest are retired/moved away or passed on. No family either.

I have an old set of Craftmen drill bits, and a newer set of Dewalt(probably chinese). 

How do you know tap size/drill size. Screw size ?  

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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Pepe Ray posted this 18 November 2018

"How do you know tap size/drill size. Screw size ? " 

At some point in your career you should have happened on a Brownells Catalog. In the section where you order the drill bits and taps etc, you'll find charts explaining the sizes or required drill bits, taps, tap drill, master hole, for your needs. I cut out those pages and mount them in my shop. Invaluable FREE information. 

Good luck and good shooting, Pepe Ray

Only in His name.

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delmarskid posted this 18 November 2018

I would try Teflon tape. Roll it on clock wise. Tapping is the right way to do it but tape would be easy.

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Ken Campbell Iowa posted this 18 November 2018

tip: .. for this use, if room, it is better to use about a number 8-32 setscrew size.  smaller, cuter taps are pretty brittle for hand tools .  #29 drill bit is the classic for 8-32, but #28 ( larger hole ) will be easier to tap .   yep, i use #8 or #10 for gun sights, same reasoning.   when drilling/tapping, keep chips cleaned frequently; chips break tools, not the  mold block material.  bullet lube makes good tap lube.

there are tap/drill charts all over google-land.  here are a couple .

https://littlemachineshop.com/reference/tapdrill.php

http://faculty.etsu.edu/hemphill/tap_drill.htm

ken

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BigMan54 posted this 18 November 2018

Thanks, Guys.

You are always ready with good answers.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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