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Post by lyled1117 on Sept 30, 2019 13:54:38 GMT -5
I've got an HO Hallmark E5A/B that I'd like to put grabs and other comparable details on. This would be a LOT of holes. The model is nickel plate over brass.
One option is to hand drill with a pin vice. Doing that I'm certain I will go through a significant number of bits, even if I chuck them to have only a small amount of the drill outside of the vice. Lubrication like bees wax or oil will be used. I'm willing to do this but am hoping others might have a safer, easier method.
I wish I had but don't have access to a drill press which I think would be somewhat easier I think. The drill bit would be static, I would be holding and moving the model instead of the opposite.
Some method for locating a starting location would also be desirable. Having some kind of dimple to keep the bit from walking is what I mean
Thx for any thoughts, etc Lyle D
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EMDX6043
Chairman
Future ex-modeler
Posts: 837
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Post by EMDX6043 on Oct 1, 2019 5:36:33 GMT -5
Maybe one of these things from Micro-Mark will help (link below).
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Post by icghogger on Oct 1, 2019 6:36:05 GMT -5
You should turn the bit, not the work. If the bit does not stay perpendicular to the work, the bit will break. Before you drill, center punch each location so the bit does not wander and damage the surface. Because the metal on those shells is thin, do not use a automatic center punch, as it will deeply dent the work. You only want a small dimple. Use a sharp scriber as your punch. Press down on the scriber just enough to get the dimple you need to keep the drill bit on the mark. Use lubricant on the bit (bee's wax is an excellent choice), work slowly, using a piece of wood to back up the bit so it will not tear through the hole when it exits. So you don't get tired or cramps, drill three or four holes in one sitting, take a break, and come back after a few minutes to do a few more. If you work slowly, it will be unlikely you will break the bit, however have a couple of spares on hand. Good Luck!!
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