Can I modify a Lyman case Trimmer?

COREY

COREY

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Hi guys,

I have a Lyman case trimmer that I bought a while ago and I find it can take quite a while to trim donw brass by hand when you are doinf 100 at a time. I was thinking about grinding down the shaft a bit at the handle end so that I can slide a drill onto the end to speed things up. My questions are:

- Can I grind enough off to make the drill fit?
- Will a drill spin too fast?
- Will this affect the quality of the trimmed brass?
- If it is a good idea, should I grind it down round, or should I make a specific shape to it?

Any help that you guys can give me would be most appreciated.

Cheers,

Corey
 
lyman trimmer

COREY said:
Hi guys,

I have a Lyman case trimmer that I bought a while ago and I find it can take quite a while to trim donw brass by hand when you are doinf 100 at a time. I was thinking about grinding down the shaft a bit at the handle end so that I can slide a drill onto the end to speed things up. My questions are:

- Can I grind enough off to make the drill fit?
- Will a drill spin too fast?
- Will this affect the quality of the trimmed brass?
- If it is a good idea, should I grind it down round, or should I make a specific shape to it?

Any help that you guys can give me would be most appreciated.

Cheers,

Corey
Click to expand...
Lyman makes a power adapter for the trimmer. Costs about $20 US. Go to their site: http://www.lymanproducts.com/lymanproducts/index.htm
Click on "Trimmers/case prep", scroll down to "Universal Trimmer Power Adapter"

I have one & it works fine with a variable speed drill which I run at low to medium speed (400-700 rpm). Just keep the cutter sharp & it does a good job.
 
I did a mod on one of mine.
Removed the crank handle.
Drilled and taped the end where the crank handle was.( 1/4-NC )
Installed an allen head cap screw and lockwasher.
I use a cordless screwdriver and an allen hex adapter to drive the spindle.
I don't think it improved my trimming time, but my wrist and arm are not as tired.
 
Would the drill adpater, whether purchased or fabricated, work with a normal power drill? I have a Ryobi corded drill that has the torque adjuster on it that I had planned to use, I assume that it is not a low sped drill.
 
trimmer

Because the shaft has a certain amount of runout I find that the faster you run the drill the more the wobble is noticed. I suspect that over time that would wear the bronze bushing that the shaft rotates in. Unless your corded drill is a variable speed (not variable torque) model you would be bertter off buying a cheap variable speed cordless drill. Princess Auto would be a good place to look for one or Harbor Freight in the U.S. Even Crappy Tire has them on sale from time to time.
 
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