gun drill

I do all my coring with the tailstock. I could put the tailstock in between the carriage and headstock and use the power feed to push it along. But it only takes a few minutes to core without it so I don't bother. I also have a feel for it if something slips or is going wrong. I tend to think most quality lathes have tailstocks that are lined up just as good as someone can eyeball getting a drill going in centered on a cross-slide. I can see advantages to both ways. They do call them coring drills and not coring bars.

Hi,

I don't have a Hightower lathe in my shop but his headstock is perfect for holding a piece for lathe operations because it holds the stock on the ends.

This is why I use my steady rest and center my piece on the live center before tightening the paws. Concentricity. The wax on the OD is just for lube for the fw minutes the piece is cored.

JMO,

Rick
 
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I used my tailstock, but i kind of like the idea of using the tool post. The problem i have with doing that is that my lathe isnt long enough to do that. The hole turned out very well, and im gonna bore the starter hole next time, so im sure it will be even better. Sorry for causing all the arguing fellas, i just wanted to talk about holes, lol.

Joe
 
I guess you've never seen bearing inside a steady rest ?
Or chuck inside a steady rest ?
Steady rest with bearing on the tips ?
Here's a good one.
http://www.thefintels.com/aer/steadyrestmod.htm




What do you mean +.010 variance ? If your gun drill is .750", would you want that hole to be .760" ?

I put a 1.25 piece of Delrin(a foot or so long), with a 60 degree center cut into it, into my rear chuck and use it to steady the back part of the wood. I have not had any issues using this whatsoever.
 
I used my tailstock, but i kind of like the idea of using the tool post. The problem i have with doing that is that my lathe isnt long enough to do that. The hole turned out very well, and im gonna bore the starter hole next time, so im sure it will be even better. Sorry for causing all the arguing fellas, i just wanted to talk about holes, lol.

Joe

Use it without the tail stock and I'm sure it will be long enough....
 
I do all my coring with the tailstock. I could put the tailstock in between the carriage and headstock and use the power feed to push it along. But it only takes a few minutes to core without it so I don't bother. I also have a feel for it if something slips or is going wrong. I tend to think most quality lathes have tailstocks that are lined up just as good as someone can eyeball getting a drill going in centered on a cross-slide. I can see advantages to both ways. They do call them coring drills and not coring bars.

They are gun drills....coring for cues is an afterthought after many many years of successful use boring barrels.

I doubt you would see many machinists pushing a tailstock into a 5 inch gun:D They are under power....

For those who enjoy doing it by hand......

http://www.youtube.com/watch?v=wqovJrSsza8
 
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They are gun drills....coring for cues is an afterthought after many many years of successful use boring barrels.

I doubt you would see many machinists pushing a tailstock into a 5 inch gun:D They are under power....

For those who enjoy doing it by hand......

http://www.youtube.com/watch?v=wqovJrSsza8

They are called gun drills b/c you don't have to pre-drill the pieces and bore them with the gun drill.

I am stuck with gun drills with air attachments in the rear. :eek:
Instead of spoon feeding who don't know how it's done, I'll leave to some to use imagination how one can easily line up that drill.
If your lathe has no compound, you might not be able to line it up right.

I should have taken that bet and but I didn't know what it entailed.
 
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They are called gun drills b/c you don't have to pre-drill the pieces and bore them with the gun drill.

I am stuck with gun drills with air attachments in the rear. :eek:
Instead of spoon feeding who don't know how it's done, I'll leave to some to use imagination how one can easily line up that drill.
If your lathe has no compound, you might not be able to line it up right.

I should have taken that bet and but I didn't know what it entailed.

I think there is a lot of over thinking going on here. I use a gun drill that originally had the coolant feed in the rear. The shank end was 3/4 in.

I turned the end down to 1/2 in to fit in the tail stock chuck. I also drilled a hole in the side about 1/2 inch from the chuck. I inserted an air fitting in the hole. I used G5 to plug the coolant hole in the end and also glued in the air fitting with G5. (don't tell me G5 is for temporary glue joints)

I always bore an exact size starter hole for the carbide head of the drill. I never support the drill other than in the tail stock chuck. Once it's in the hole, the gun drill follows its own bore. I feed it by hand. The drill is 28 inches long. It drills a perfectly straight hole every time.

There are 100 ways to drill it. Most of them work perfectly. If they all result in a perfect hole.........is any one method better than another?

Kim
 
I always bore an exact size starter hole for the carbide head of the drill. I never support the drill other than in the tail stock chuck. Once it's in the hole, the gun drill follows its own bore. I feed it by hand. The drill is 28 inches long. It drills a perfectly straight hole every time.

There are 100 ways to drill it. Most of them work perfectly. If they all result in a perfect hole.........is any one method better than another?

Kim
Is boring a starter and exit holes a better method ?
 
Dick,

Have you ever tried a gun drill mounted in the tail stock? I have.

From the words in your post I would guess not because you can't believe anyone would even think of doing that. They make gun drills with a 90 degree air inlet for that singular purpose.

I guess the "If the gun drill is aligned properly" part of your statement is the crux of this argument. Frankly, I got better things to do with my time than worrying about aligning a tool on 2 axises after boring when I am looking for a +.010 fit after sanding a dowel. But I do want a straight hole. The tailstock method gives me that after center drilling while holding with the chuck and the steady rest.

"Sterling Gun Drill" gives you the option for use in the tail stock or tool mount. I guess like me, they don't share your mindset in this area.

From Their Website:

Drills for non-metals:
Pool cues, woodwinds, plastic, composite, etc. "X" in field 15 of part number. All to be .0015”/inch back taper, R-3 Contour, N-8 nose grind unless otherwise noted. Lathe applications: determine “side air” (in tailstock) driver or “rear air” (on carriage) driver. Pipe tap 1/8” (side air), 1/8"or 1/4” (rear air).


As I said before, JMO,

Rick G

Dude, you must be from another planet. This is the reason that a boring bar is used to make the hole to start the gun drill. If you start true you will end up true. I use a center rest also but mine is set up with a bearing and a number of collets so it is always aligned with the spindle bore. Throwing on the center rest, putting in a dowel and aligning the gun drill takes me less than 2 minutes from the time I walk up to the lathe with the center rest in my hand until the lathe is feeding the drill and boring the hole. The properly sized and straight bored hole in the material and a dead center in the tail stock automatically aligns the tool post to the center of the spindle.

Your use of the tail stock and chuck is rather futile as few are properly aligned with spindle from left to right and very, very few are aligned in height as when the lathe is built it is designed that the tail stock is high so that over the years it will wear in instead of wearing out. On top of all of this you are trying to use a center rest with no repeatability, can't align the wood tightly and is probably burnishing the wood to different depths as it is revolving throwing your accuracy off. I would guess, or even bet that starting fresh, with nothing set up on the lathe, I can install my Center rest, put in my dowel, aligned the drill and finish boring the hole before you get your center rest aligned. I've been doing coring on almost every cue I've built for about 12 years now and have bored probably 7-800 cues and only one time I had the feed to fast and broke a piece of bocota. How many and what success have you had for how long now? You said that apparently I haven't tried your method and you are almost correct. The first time I tried to bore a hole I bought a 3/4 inch Greenly boring bit used by electritions for boring joists. The Cocobolo immediately split and I ordered a gun drill the following day. The very thought of trying to hand feed that drill at a constant speed for that length terrifies me. I'd much rather let the lathe do what it is designed to do.

If you only intend using the gun drill once or twice in your career then I can see doing it your way but I knew after my first coring this was going to be a permanent operation, I immediately started making delrin collets and a bearing center rest.

Dick
 
They are called gun drills b/c you don't have to pre-drill the pieces and bore them with the gun drill.

I am stuck with gun drills with air attachments in the rear. :eek:
Instead of spoon feeding who don't know how it's done, I'll leave to some to use imagination how one can easily line up that drill.
If your lathe has no compound, you might not be able to line it up right.

I should have taken that bet and but I didn't know what it entailed.

LOL....Joey. Just google up a REAL gun drill. They are all driven by power. No one who practices modern technology pushes a drill through a barrel...and yes, bushings are available that would preclude predrilling.
 
Your use of the tail stock and chuck is rather futile as few are properly aligned with spindle from left to right and very, very few are aligned in height as when the lathe is built it is designed that the tail stock is high so that over the years it will wear in instead of wearing out. Dick

I did not know this one. But it is good to know a new area that cue lathes are superior to metal lathes in.
 
Dude, you must be from another planet. This is the reason that a boring bar is used to make the hole to start the gun drill. If you start true you will end up true. I use a center rest also but mine is set up with a bearing and a number of collets so it is always aligned with the spindle bore. Throwing on the center rest, putting in a dowel and aligning the gun drill takes me less than 2 minutes from the time I walk up to the lathe with the center rest in my hand until the lathe is feeding the drill and boring the hole. The properly sized and straight bored hole in the material and a dead center in the tail stock automatically aligns the tool post to the center of the spindle.

Your use of the tail stock and chuck is rather futile as few are properly aligned with spindle from left to right and very, very few are aligned in height as when the lathe is built it is designed that the tail stock is high so that over the years it will wear in instead of wearing out. On top of all of this you are trying to use a center rest with no repeatability, can't align the wood tightly and is probably burnishing the wood to different depths as it is revolving throwing your accuracy off. I would guess, or even bet that starting fresh, with nothing set up on the lathe, I can install my Center rest, put in my dowel, aligned the drill and finish boring the hole before you get your center rest aligned. I've been doing coring on almost every cue I've built for about 12 years now and have bored probably 7-800 cues and only one time I had the feed to fast and broke a piece of bocota. How many and what success have you had for how long now? You said that apparently I haven't tried your method and you are almost correct. The first time I tried to bore a hole I bought a 3/4 inch Greenly boring bit used by electritions for boring joists. The Cocobolo immediately split and I ordered a gun drill the following day. The very thought of trying to hand feed that drill at a constant speed for that length terrifies me. I'd much rather let the lathe do what it is designed to do.

If you only intend using the gun drill once or twice in your career then I can see doing it your way but I knew after my first coring this was going to be a permanent operation, I immediately started making delrin collets and a bearing center rest.

Dick

Dick,

If I were ruining wood do your really think I would continue to do so?

I core all components on my butts when they are are just under 1.5" and install them to a 30" core at that size and any marks from the steady rest are gone after one or two taper passes on the saw. I have found that turning at 450 rpm does the job real good and it does not take more than a few minutes for me to control the feed by turning the hand wheel and overhauling the quill every 3 1/2" inches. Are you implying I am hurting the wood or something?

The difference between my 30" dowel and the core diameters is over .010. Once the cue parts are glued on the dowel and the unit is tapered between centers I don't think it matters much if it was bored before gun drilling or if the primary hole is center drilled with a 3/4" center drill after is was aligned it a steady rest to a 3/8" center that was established on the wood when the piece was faced close to the jaw of the lathe chuck.

All of the points you bring to the discussion are valid if you are trying to make a gun barrel or something like that but are not relevant to this end in cue making IMO.

Tail stocks are adjustable and have areas for shimming them on the Y and Z, at least mine does. I have done this using my precision Thompson Rod as mine was indeed off pretty good at +30" on the X. Dial indicator and a shim kit and you can get them pretty close.

Gun drills are very useful tools and they make them in different configurations for different purposes. I guess when I ordered my two gun drills from Sterling and requested the tail stock unit advertised on their website for cue making and the like, their design engineers must be Klingons and Romulins as you know us beings from other planets must stick together.

The mere fact that they are designed and sold for tailstock use renders your whole argument that your ways is the absolute and ideal null and void. There are more ways to skin a cat.

If you are happy with your procedures and work practices that's cool I am down with that dude.

I still like you and think your cool but I respectfully disagree with your point of view and your presentation.

Progress in any human endeavor always is curtailed by those that close their minds to those who offer their ideas. Especially when nothing is asked in return for sharing said ideas.

Rick G
 
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Guys, this is making a storm in a glass of water.

I have coring drills which I use in the tailstock and I have a different which I can use on my quick change tool post. Both work !

Alining the ones in the tailstock is easy. Just make sure the tailstock is zeroed and not off set.

Doing the same with my quick change tool post version is also easy.
1.Drill and tap the rear of the drill to fit your 1/4" air connection.
2. Bore the center hole in the wood
3. Install quick change tool post drill - adjust height and cross slide so the
drill is alined with your tailstocks livesenter by using the 1/4" air hose connector as alinement barrel.
4. fixate quick change tool post, remove tailstock - attach air hose
5. start coring.
Next time, height is fixed by your tool post - cross slide fix the off set by (3) - done in no time.

I think we are splitting hairs here guys and the OP has most likely got his answers long time ago - so
lets just state that both methods work and depending on which machine config people use - they might prefer either or.

K
 
Guys, this is making a storm in a glass of water.

I have coring drills which I use in the tailstock and I have a different which I can use on my quick change tool post. Both work !

Alining the ones in the tailstock is easy. Just make sure the tailstock is zeroed and not off set.

Doing the same with my quick change tool post version is also easy.
1.Drill and tap the rear of the drill to fit your 1/4" air connection.
2. Bore the center hole in the wood
3. Install quick change tool post drill - adjust height and cross slide so the
drill is alined with your tailstocks livesenter by using the 1/4" air hose connector as alinement barrel.
4. fixate quick change tool post, remove tailstock - attach air hose
5. start coring.
Next time, height is fixed by your tool post - cross slide fix the off set by (3) - done in no time.

I think we are splitting hairs here guys and the OP has most likely got his answers long time ago - so
lets just state that both methods work and depending on which machine config people use - they might prefer either or.

K

They both work K.
I dunno about how rigid the saddle on Taig lathes though.
 
Did you guys know that hippo milk is pink and that more than 10 people a year are killed by vending machines????

I never knew!!!
 
They both work K.
I dunno about how rigid the saddle on Taig lathes though.

As mentioned by me, yes - both work, and yes - depending on the machine people use - they might prefer one over the other :wink:

I never used a Delux so I can't comment on how rigid the cross slide or the saddle is, but it might be the reason for tailstock feed.
And as Chris has mentioned, he can use the auto feed to move the tails stock so hand feeding is not a must on these machines.

Anyway, go make some dust now guys :)

K
 
Dick,

If I were ruining wood do your really think I would continue to do so?

I core all components on my butts when they are are just under 1.5" and install them to a 30" core at that size and any marks from the steady rest are gone after one or two taper passes on the saw. I have found that turning at 450 rpm does the job real good and it does not take more than a few minutes for me to control the feed by turning the hand wheel and overhauling the quill every 3 1/2" inches. Are you implying I am hurting the wood or something?

The difference between my 30" dowel and the core diameters is over .010. Once the cue parts are glued on the dowel and the unit is tapered between centers I don't think it matters much if it was bored before gun drilling or if the primary hole is center drilled with a 3/4" center drill after is was aligned it a steady rest to a 3/8" center that was established on the wood when the piece was faced close to the jaw of the lathe chuck.

All of the points you bring to the discussion are valid if you are trying to make a gun barrel or something like that but are not relevant to this end in cue making IMO.

Tail stocks are adjustable and have areas for shimming them on the Y and Z, at least mine does. I have done this using my precision Thompson Rod as mine was indeed off pretty good at +30" on the X. Dial indicator and a shim kit and you can get them pretty close.

Gun drills are very useful tools and they make them in different configurations for different purposes. I guess when I ordered my two gun drills from Sterling and requested the tail stock unit advertised on their website for cue making and the like, their design engineers must be Klingons and Romulins as you know us beings from other planets must stick together.

The mere fact that they are designed and sold for tailstock use renders your whole argument that your ways is the absolute and ideal null and void. There are more ways to skin a cat.

If you are happy with your procedures and work practices that's cool I am down with that dude.

I still like you and think your cool but I respectfully disagree with your point of view and your presentation.

Progress in any human endeavor always is curtailed by those that close their minds to those who offer their ideas. Especially when nothing is asked in return for sharing said ideas.

Rick G

You're correct that I went overboard in demeaning the use of the tail stock and pushing the tool post method. What got me upset was your statements about your methods as being so much quicker in setting up and more accurate
once completed which is 100% B/S. Using a center rest without a bearing is so inefficient as to border on being ridiculous as you now must dial in each and every piece of wood you intend to work on where if you were using a bearing you center the bearing once and then you can take the center rest off and re-install 10,000 times and it is still just as accurately set as it was initially. It never moves. So instead of all of the time spent mounting the rest and then indicating the dowel to run true, you just mount it which takes 30 seconds at most. When I said that running with 3 points with wax burnishes the wood differently in different areas I didn't mean that you couldn't turn the marks out. Most know that but while this burnishing is occurring, you are losing your accuracy as now the dowel will have play in your rest.

As far as having to align the drill in two different axis's as so time consuming is all rhetoric also but as usual, untrue. You have to set the height for the drill one time on the quick change and then every time you drop it in place it is at that height. Boy, that sure took a long time. As far as aligning the drill to the hole in the material takes no more than 20 or 30 seconds either as long as the starting hole was bored accurately. The drill won't enter the hole if the drill isn't aligned.

As far as Sterling making both side oil holes and rear oil holes goes, this is true. They may have on their site that they do this for people who prefer not to use the tool post as they are already making this style but they are for gun drill boring machines where the head of the drill goes into the machine and the drill turns instead of the barrel. They also have a bushing support near the head of the drill to support it. An external hose for an oil supply would soon be wrapped up pretty badly in this situation.

Now, you said that your approach is quicker as you just put your drill in the tail stock where as I must align the tool post. That is quicker BUT how long does it take you to mount the center rest and center your dowel in the steady rest? My way - 30 sec. top to mount and use. Aligning your drill - almost instantly, Aligning the drill on my tool post, maybe 30 sec. So*** I can set up for coring and be drilling in less than 2 minutes. I don't know how long it takes you as I don't know how long it takes you to indicate in your dowel on the steady. Now we are both set up and ready to drill, I flip a lever,start the drilling and when completed I flip the lever back. You on the other hand must feed the drill by hand at an inconsistent speed, stop every 2.5 to 3 inch, crank your tail stock ram back, push your tail stock forward and repeat. While your doing this cranking and re-positioning, and monitoring I'm over on another lathe putting on a ferrule or making a shaft or what ever I feel like doing. So, even if the end results were identical, by using your equipment efficiently, as it was designed for, the tool post method and a steady rest set up properly is so much more time efficient that they're not even in the same ball park.

By the way, this statement from you is what stared all of this "Then just install the gun drill in the tail stock chuck and have at it. No walking. Don't use the tool post to anchor your gun drill, the slightest angle variance in X alignment of the drill will make the job fail." I've only had one fail out of hundreds that I have done and it wasn't because of alignment.


Thank you,

Dick
 
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By the way, this statement from you is what stared all of this "Then just install the gun drill in the tail stock chuck and have at it. No walking. Don't use the tool post to anchor your gun drill, the slightest angle variance in X alignment of the drill will make the job fail." I've only had one fail out of hundreds that I have done and it wasn't because of alignment.


Thank you,

Dick

Hey Dick,

After re reading my own words, I too should have chosen them a little better. Everything would have been rosy if I would have said be careful if you use a tool post anchor instead of Don't.

Quite frankly, not having used the tool post method, I saw it as problematic as I never myself tried it. Because my tool is over 20" long I was envisioning a situation whereby the tool had to be indicated true with the X axis and then adjusting the Z hight to a perfect center or the hole would rum wildly.

I believe you when you say it takes 30 seconds to adjust your height and angle and with that being said I am truly sorry to have jousted with you on this point as is is a moot point because both way swork fine for this application.

I have always looked up to you as one of the good guys here and will continue to do so.

You got to admit that any people who are getting into coring got their moneys worth on the one because peer check and review on this forum is the best way to see both sides of an issue.

Thank you also,

Rick G
 
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