Spot drilling on an angle

A

AMMASHOOTA

Gary Gruber
How do you spot drill a hole on an angle without the drill wandering?

i want to lighten a handgun slide by putting 'popple holes' on both sides. this requires drilling several holes inline at a fairly steep angle for the effect. i am unsure how to accuately spot the hole.
 
I use solid short carbide "spotter drills" . Go very slow,take your time,spot the hole & when you are deep enough switch to the drill that you want to use if you are going all the way through..practice on some scrap metal if you can..before u go to the actual part u want to do..
 
ROCKJAG4 said:
I use solid short carbide "spotter drills" . Go very slow,take your time,spot the hole & when you are deep enough switch to the drill that you want to use if you are going all the way through..practice on some scrap metal if you can..before u go to the actual part u want to do..
Click to expand...

how slow is very slow (RPM)?
 
AMMASHOOTA said:
i want to lighten a handgun slide by putting 'popple holes' on both sides. this requires drilling several holes inline at a fairly steep angle for the effect. i am unsure how to accuately spot the hole.
Click to expand...
The first thing I would d is make sure that slide is not made from a casting.
 
I, am not sure what a popple hole is, or what you consider a steep angle. The recommendations about the spotting drill, and the endmill, will both work in the right set of circumstances. A 90 deg. spotting drill, can't be used at an inclination of more than 45 deg., or the point will not touch the part. The endmill will work, if it allows a center drill, or spotting drill to cut a coned hole in the bottom surface, which has an inverted cone. If you are just after blind dimples, to remove weight, and to add a gripping surface, a "stub length", carbide ballmill, may be your best route. If the hardness of the slide, and the number of holes, would be sufficient, pay a couple bucks more for TIN(titanium nitride) coating, with any of tools that you choose to use.
Regards,
Bob
 
I know you are not to trade, or sell on this forum but I have a complete Rem. 722 bolt in .222. I will go to someone with a digital camera to post where this belong's. I would like to turn it into something I can use in trade other than make any money. Pull this post if I am out of line, and I will try to but it where it belongs.
 
Chip Soles said:
I, am not sure what a popple hole is, or what you consider a steep angle. The recommendations about the spotting drill, and the endmill, will both work in the right set of circumstances. A 90 deg. spotting drill, can't be used at an inclination of more than 45 deg., or the point will not touch the part. The endmill will work, if it allows a center drill, or spotting drill to cut a coned hole in the bottom surface, which has an inverted cone. If you are just after blind dimples, to remove weight, and to add a gripping surface, a "stub length", carbide ballmill, may be your best route. If the hardness of the slide, and the number of holes, would be sufficient, pay a couple bucks more for TIN(titanium nitride) coating, with any of tools that you choose to use.
Regards,
Bob
Click to expand...

here's a photo
View attachment 11926
 
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