Scrap yard find

[TomG]

Those are likely just screw machine length drill bits. They can be had in any point/angle combination that an ordinary jobbers length bit comes in. Most of mine in that length are 135º split points .

Tom

[EdK]

(05-29-2014, 10:09 AM)Mayhem Wrote: Top right-hand drill in your top right-hand picture looks to be a spotting drill....

I think that's just a broken center drill.

Ed

[EdK]

(05-29-2014, 10:04 AM)chucketn Wrote: I think the short drills are spotting drills. Can anyone post a picture of a spotting drill, jobber length, and regular drill bit so I can get an idea of length, please?
What is the attack angle on a spotting drill?

Chuck

The top, center picture the right drill bit and two from it might be a center drills. I'd need a better picture to tell for sure.

Ed

[Highpower]

(05-29-2014, 09:42 AM)TomG Wrote: Ok, now you can get an official

It's amazing they would sell that stuff for 25¢ a pound, and even more amazing that perfectly good cutters like that would end up in a scrap yard. Good find!

Tom

I went into a local home surplus/overstock store years ago and found a bunch of like new Nicholson files in a box and picked out a handful of them. Cost me something like $4.00 IIRC. Next to that box was a pallet sitting on the floor with a large wood crate on it. The crate was filled with new horizontal milling cutters of all types and sizes up to about 10 inches in diameter. At least half of them still had the plastic/wax shell on them. I didn't even have my vertical mill at the time so I walked away from them.

[PixMan]

(05-29-2014, 10:04 AM)chucketn Wrote: I think the short drills are spotting drills. Can anyone post a picture of a spotting drill, jobber length, and regular drill bit so I can get an idea of length, please?
What is the attack angle on a spotting drill?

Chuck

The short drill in the top-middle photo are simply "screw machine length" drills.

All the drills in the top-right photo are "center drills", sold by Keo (and other makers) as "combined drill and countersink." As most appear to be, they are the common 60º included angle except for perhaps the last one on the right which may be a 90º one. Three of them have one broken end, the common failure which is why I now use 90º spotting drills when I need one, and center drills only for making center on parts to run between centers on the lathe.

I'll see if I can get a photo of the spotting drills I have.

[Mayhem]

Hang on - I see the pictures in two columns, so there is no middle photo that I can see

[EdK]

(05-29-2014, 07:20 PM)Mayhem Wrote: Hang on - I see the pictures in two columns, so there is no middle photo that I can see

Oops! It depends on your monitor. My monitor at work is a high resolution 27" monitor so it showed three columns. My notebook, which is what I'm using to type this post, only shows two columns. My bad.

Ed