F/S: .312" gun-drills

K

KJ Cues

Pro Cue Builder & Repair
Silver Member
I first disclosed these in another thread where the OP was asking for one.
I'd rather not use his thread for my sales, so here we go.

.312"D x 6.5" drill depth x 8" OAL. Air-feed is from the rear but can be easily modified.
I can provide machining service to modify to suit. My shop-rate is $50/hr.
Rear air in or side air in. Tool-post or tail-stock mount.
A little imagination on your part here will go a long way.
I can TIG weld the rear-feed hole shut for free if requested.
These are brand-new in tube. $30ea. shipped, w/ins.
My email <kjcues@hotmail.com> is my Pp acct.
Please do not send as a 'gift'. Biz is biz.
PM is fine.

Thanx, KJ

GD6.JPG
 
I understand the reasoning for a 'deep' hole so you can adjust bal. point with a headless bolt.
However, as fate would have it, this is the only length that I have for sale.
Thanx for asking.

KJ
 
rhncue said:
Is this the only drill length or can they be acquired longer? I presently drill and tap 11" into the handle.

Dick
Click to expand...

I've seen them out on ebay anywhere from 8" long up to 60" long. There is a 36", a 48", and a 60" out on ebay right now but of course not near as a deal as the ones KJ is selling.
 
KJ...... in the other thread you stated the thread on the back side was a 9/16x18.

Any idea where I could obtain an adapter that will fit into the tailstock on my Taig lathe that I can screw the gun drill bit into ??
 
adaptor

Dirtbmw20 said:
KJ...... in the other thread you stated the thread on the back side was a 9/16x18.

Any idea where I could obtain an adapter that will fit into the tailstock on my Taig lathe that I can screw the gun drill bit into ??
Click to expand...



This is not real hard.
Get a piece of rod stock that will fit in your tailstock. Drill and tap a hole to fit the drill. If you want air, drill and tap another hole in the side for your air.
If you patiently peck-drill, you can live without the air.
That's what I would do.

Robin
 
carguy said:
This is not real hard.
Get a piece of rod stock that will fit in your tailstock. Drill and tap a hole to fit the drill. If you want air, drill and tap another hole in the side for your air.
If you patiently peck-drill, you can live without the air.
That's what I would do.

Robin
Click to expand...

Robin...... when I was home for lunch, I tried putting a 9/16" rod stock in my 1/2" tailstock, it was kinda hard to me :D

Nah, seriously though, if my tailstock is 1/2" then I need to turn it down so it will fit in the tailstock. I've only tried messing with metal one time on this Taig lathe and I thought the thing was gonna come apart so I don't feel it is something I can turn down myself to fit in the tailstock. I thought of useing a piece of phenolic but thought that would possibly flex too much. In all honesty, I kinda feel like I need a real metal lathe to use a gun drill "effectively" but it is just something I wanted to play around with. I would not be useing air with it either, peck and drill as you say.
 
The absolute simplest way to mount the drill would be to turn the threads off of the threaded section,
down to 1/2" and bingo, it fits your chuck.
As for air-feed, do as Robin suggested and drill/tap the large dia. section for a bushing
that you can screw an air fitting into. Thanx Robin. (and I mean it this time).

If and when you're ready to purchase, let me know and I can weld the rear air hole shut.

HTHs, KJ
 
KJ Cues said:
The absolute simplest way to mount the drill would be to turn the threads off of the threaded section,
down to 1/2" and bingo, it fits your chuck.
As for air-feed, do as Robin suggested and drill/tap the large dia. section for a bushing
that you can screw an air fitting into. Thanx Robin. (and I mean it this time).

If and when you're ready to purchase, let me know and I can weld the rear air hole shut.

HTHs, KJ
Click to expand...

Thanks KJ, that's exactly what I meant when I said I would just have to turn it down to fit in my tailstock. The one and only time I tried playing with metal on this lathe I thought it was gonna vibrate off the table and onto the floor. It'll give me something else to play with and try though.
 
Even steel can be turned on a light-duty lathe with appropriate slow speed, slow feed, lubricant and LIGHT CUT. I did it for my own gun drills so they would fit the holder I had. It worked fine.

Robin
 
carguy said:
Even steel can be turned on a light-duty lathe with appropriate slow speed, slow feed, lubricant and LIGHT CUT. I did it for my own gun drills so they would fit the holder I had. It worked fine.

Robin
Click to expand...

Yes I know it CAN. I just said I didn't have much success my first time trying. Experience means a lot, I'm slowly learning as time passes.:)

Sent from my SCH-I535
 
s l o w l y

Dirtbmw20 said:
Yes I know it CAN. I just said I didn't have much success my first time trying. Experience means a lot, I'm slowly learning as time passes.:)

Sent from my SCH-I535
Click to expand...

SLOW is the secret for cutting hard materials like steel. Slow that lathe WAY DOWN and take a light cut and you'll be fine. Use a little cutting fluid (a special oil) to lube the cut. Be patient and you will succeed.

Robin
 
carguy said:
SLOW is the secret for cutting hard materials like steel. Slow that lathe WAY DOWN and take a light cut and you'll be fine. Use a little cutting fluid (a special oil) to lube the cut. Be patient and you will succeed.

Robin
Click to expand...

Thanks Robin. I will certainly take the advice. I have some rapid tap cutting fluid sitting on my drill press.

Sent from my SCH-I535
 
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