Drill Bit question
- Thread starter rodster_67
- Start date
it was probably originally a morse taper drill bit. the taper was machined off to fit a standard drill chuck
they have value , but no more than a quality bit would have ( I assume they are good quality)
they have value , but no more than a quality bit would have ( I assume they are good quality)
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OP
rodster_67
Well-known member
Interesting. I saw morse taper bits online but since these aren't tapered I was confused. Didn't consider they might have been machined to remove the taper. Thanks!!
So do I sell them as un-tapered tapered drill bits.
Was 1̶3̶/̶6̶4̶" 33/64"common for some application?
So do I sell them as un-tapered tapered drill bits.
Was 1̶3̶/̶6̶4̶" 33/64"common for some application?
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just list them as 13/64 drill bits. and they were probably common for whoever you got them from
Looks too short to have been a MT shank. And too small a diameter drill. Most of the turned down taper shanks I've seen have been over 1/2". Basically home made Silver and Deming bits. Also if you have several of the same size it's highly unlikely someone would have turned them down.
My guess is they're for a production drilling application that required a drive tang.
My guess is they're for a production drilling application that required a drive tang.
OccupantRJ
Well-known member
Auto series tang drive drill.
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rodster_67
Well-known member
I have 3 bits and the other two are not turned down. One is a CLEveland Forge an the other is a National. Just so happens I picked this one to take a picture of. Looks to be turned down as I don't see any stampings in that area.
My dad was an electrician so perhaps he had an application for that size?
I can understand the tang to help with driving force but what was the purpose of a taper on a drill bit?
Also the end is coated in wax, would that indicate new or maybe sharpened at one time? I don't think I ever saw new drill bits with the ends dipped in wax.
Thanks for the info guys.
My dad was an electrician so perhaps he had an application for that size?
I can understand the tang to help with driving force but what was the purpose of a taper on a drill bit?
Also the end is coated in wax, would that indicate new or maybe sharpened at one time? I don't think I ever saw new drill bits with the ends dipped in wax.
Thanks for the info guys.
morse taper is used in machine shops , and it would be used probably in a lathe . the lathe tailstock has a morse taper , the drill fits directly into it so it reduces the length of adding a chuck, and less parts to keep it more in center.
the wax could be from resharpen or new. probably your dad got it from a machine shop buddy, or he worked there ona job & happened to fall into his lunch pail LOL
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rodster_67
Well-known member
You don't know what you don't know.
The key was Morse Taper
I googled it and am much wiser.
The machine taper is a simple, low-cost, highly repeatable, and versatile tool mounting system. It provides indexability, as tools can be quickly changed but are precisely located both concentrically and axially by the taper. It also allows high power transmission across the interface, which is needed for milling.
Thanks.
My dad always carried a lunch box so perhaps the got in there by mistake.
I'm guessing the non tapered with the tang were just regular drill bits with extra drive capability. I could see him using a serious drill in his job.
The key was Morse Taper
I googled it and am much wiser.
The machine taper is a simple, low-cost, highly repeatable, and versatile tool mounting system. It provides indexability, as tools can be quickly changed but are precisely located both concentrically and axially by the taper. It also allows high power transmission across the interface, which is needed for milling.
Thanks.
My dad always carried a lunch box so perhaps the got in there by mistake.
I'm guessing the non tapered with the tang were just regular drill bits with extra drive capability. I could see him using a serious drill in his job.
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Mohawk Dave
Well-known member
Good call!
I did not know these were a thing.
http://catalog.eoasaw.com/viewitems...h-jobber-blank-twist-drills-viking-drill-tool
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rodster_67
Well-known member
Great link. Thanks.
Still trying to figure who would be using these and for what? Not the tapered ones, I understand using those being used for machining and quick change.
Maybe shops into heavy steel fab? Snow plows, truck bodies, etc?
Still trying to figure who would be using these and for what? Not the tapered ones, I understand using those being used for machining and quick change.
Maybe shops into heavy steel fab? Snow plows, truck bodies, etc?
OP
rodster_67
Well-known member
I'm an idiot.....wouldn't make a good machinist or a secretary.
The drill bits are 33/64"!!! Gotta learn to type.
Seems that drill size would be used for a 9/16"-18 tap so makes sense now.
Again, thanks for the help.
The drill bits are 33/64"!!! Gotta learn to type.
Seems that drill size would be used for a 9/16"-18 tap so makes sense now.
Again, thanks for the help.
rsanter
Well-known member
They are from a gang drill type machine.
Heavy manufacturing, drilling multiple,holes at the same time.
Tang drive to be sure they don’t spin in the chuck and the chuck,does not have to be really tight
Heavy manufacturing, drilling multiple,holes at the same time.
Tang drive to be sure they don’t spin in the chuck and the chuck,does not have to be really tight
finn
Well-known member
I’ve got several miscellaneous tang drive , non tapered drill bits like that.
Probably got them from work, but I don’t remember for sure.
Our R&D facility was attached to a heavy manufacturing plant. I suspect the tool crib drew their stock of fasteners and hardware from plant tool crib inventory.
The tang drive bits are a littl clumsy to use, as the tang bottoms in the chuck of a common cordless drill.
Mine are old and dull. Don’t know if it’s worth sharpening them. Probably descent quality steel, though.
Probably got them from work, but I don’t remember for sure.
Our R&D facility was attached to a heavy manufacturing plant. I suspect the tool crib drew their stock of fasteners and hardware from plant tool crib inventory.
The tang drive bits are a littl clumsy to use, as the tang bottoms in the chuck of a common cordless drill.
Mine are old and dull. Don’t know if it’s worth sharpening them. Probably descent quality steel, though.