I would go with Tap Magic. I've used that for many years with no issues
both in my MRR work as well as on 12" scale automobiles.
I have no clue how it works but it does seem to prevent or at least
greatly slow dulling of taps and drills and allow drilling at a much
slower speed with good effect.
Carey
Carey Probst
Member, M.I.T. Educational Council
S Scale, Sn3 and S High Rail/AF
A well regulated militia being necessary to the security of a free State,
the right of the people to keep and bear arms shall not be infringed.
On 12/17/2010 10:52 AM, JGG KahnSr wrote:
>
>
> Old sailmakers' supplies; although marine suppliers/chandlers are much
> scarcer than sewing centers.
>
> Again speaking as one of long but not highly-skilled experience, he
> may be right that that will prevent breakage of drills,
> but it doesn't do a lot to slow dulling them; at the same time, I
> suppose any lubricant also limits the effectiveness of any
> cutting edge, which necessarily does its job by the friction against
> the softer surface being removed. Perhaps a tradeoff?
>
> I bought a small container of some talc-like substance through
> MicroMark (?) years ago to be used for any cutting application;
> I'm not sure whether it makes a lot of difference, but it doesn't seem
> to hurt, anyway.
>
> Jace Kahn
>
> General Manager
> Ceres & Canisteo RR Co./Champlain County Traction Co
>
>
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