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Drilling itty bitty holes
I just messed up my only #71 drill bit -- boo hoo.
What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. -- http://www.wescottdesign.com |
Drilling itty bitty holes
On 2011-04-09, Tim Wescott wrote:
I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. McMaster has them, what you need is a sensitive drill chuck, or a CNC milling machine that would apply consistent feed. i |
Drilling itty bitty holes
On Fri, 08 Apr 2011 21:17:56 -0500, Tim Wescott
wrote: I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. ========== see http://www.use-enco.com/CGI/INPDFF?P...MITEM=290-1291 http://www.use-enco.com/CGI/INSRAR?PMSECT=0000000605 and http://www.jtsmach.com/jtswebshop/Workholding/WH147.asp http://www1.mscdirect.com/eCommerce/...s+%26+Adapters http://www.amazon.com/AF-22-0-0008-L.../dp/B002KVIKL8 http://www.penntoolco.com/catalog/pr...categoryID=181 http://www.micromark.com/No-71-Drill...of-6,6654.html http://www.hermanscentral.com/produc...fm?sid=FRoogle -- Unka George (George McDuffee) ............................... The past is a foreign country; they do things differently there. L. P. Hartley (1895-1972), British author. The Go-Between, Prologue (1953). |
Drilling itty bitty holes
"Tim Wescott" wrote in message ... I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. -- http://www.wescottdesign.com Just go to Farnell / element 14 or RS components and grab a PCB drill the right size. Get ones with the 1/8 shank. I've use them routinely in my big old Waldown radial utility drill press and they work fine. The carbide ones are a bit fragile but ok if treated nicely. |
Drilling itty bitty holes
On 4/8/2011 10:17 PM, Tim Wescott wrote:
I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. Buy a Foredom flexshaft and drill press attachment, it's a lifetime investment and really useful for handwork and finishing. I drill thousands of holes with similar sized drills in 14 ga. sterling. I find a slow speed and beeswax as a lubricant works best. When the drills break it is usually because they are either dull or because the work moves. -- :3 )~ |
Drilling itty bitty holes
On Fri, 08 Apr 2011 21:17:56 -0500, Tim Wescott
wrote: I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. If you do a lot of small hole drilling..Ive got some Sensitive drill presses Id be interested in selling. 2 Southbends that turn 20,000 rpm and a paired unit..cant remember the name but its also at least 20k rpm All units are 208 3ph. Id suggest one of the Southbends...unless you ar coming through here..it weighs damned near 100 pounds Gunner -- "You can have peace. Or you can have freedom. Don't ever count on having both at once." Robert A. Heinlein |
Drilling itty bitty holes
On 04/09/2011 01:27 PM, Gunner Asch wrote:
On Fri, 08 Apr 2011 21:17:56 -0500, Tim wrote: I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? The one that transmits rotation to the drill, but lets you be the one that exerts downward force on it. Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) And, any suggestions of sources for drill bits, and types? McMaster has a bunch. I need some to drill aluminum, some to drill really thin (15 or 30 mil) birch plywood. If you do a lot of small hole drilling..Ive got some Sensitive drill presses Id be interested in selling. 2 Southbends that turn 20,000 rpm and a paired unit..cant remember the name but its also at least 20k rpm All units are 208 3ph. Id suggest one of the Southbends...unless you ar coming through here..it weighs damned near 100 pounds Not that many -- and I'd really like to drill the piece in the lathe, as part of a bunch of turning. I think a sensitive chuck is the way to go. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" was written for you. See details at http://www.wescottdesign.com/actfes/actfes.html |
Drilling itty bitty holes
On Sat, 09 Apr 2011 13:37:44 -0700, Tim Wescott
wrote: SNIP Not that many -- and I'd really like to drill the piece in the lathe, as part of a bunch of turning. I think a sensitive chuck is the way to go. SNIP Something that worked well for me was to adapt a pen vise. Get a drill blank that is a close fit in the hole in the handle, chuck the drill blank in the tail stock and slide the pin vise over this. While this does not transmit any torque, this is an advantage as you can feel how the drill is biting and "peck" very easily. Also good as a miniature tap wrench. I used mine mainly to make up special length drop indicator extensions [4-48 #42 tap drill] see http://www.wttool.com/index/page/cat...gory_id/14224/ (import) also General and Starrett http://tool.wttool.com/search?w=drill+blanks&x=0&y=0 http://www.use-enco.com/CGI/INSRAR?PMSECT=0002000946 http://www.use-enco.com/CGI/INSRAR?PMSECT=0002001904 -- Unka George (George McDuffee) ............................... The past is a foreign country; they do things differently there. L. P. Hartley (1895-1972), British author. The Go-Between, Prologue (1953). |
Drilling itty bitty holes
On Apr 8, 10:17*pm, Tim Wescott wrote:
Alternate suggestions for methods of drilling itty bitty holes will also be gratefully accepted (Time to build my own plunge EDM machine?) Harbor Freight has an little air tool Item # 47869 that has the high rpm's for drilling small holes. Somewhere on the internet there is a web site showing how some kids made a drilling machine for PBC's that used one of these to drill. The machine drilled from the bottom up. A laser pointer mounted above showed where the hole would be. Dan |
Drilling itty bitty holes
= Alternate suggestions for methods of drilling itty bitty holes
-=- when I was working with the guys at GE in Daytona, they drilled fiberglas PCB material at 120Krpm. Of course, they were drilling a 1/2" stack at 10 "hits" per second.... G (all .015 to .032 holes at that speed; carbide, only) LLoyd |
Drilling itty bitty holes
On Apr 9, 6:18*pm, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: = Alternate suggestions for methods of drilling itty bitty holes -=- when I was working with the guys at GE in Daytona, they drilled fiberglas PCB material at 120Krpm. *Of course, they were drilling a 1/2" stack at 10 "hits" per second.... G *(all .015 to .032 holes at that speed; carbide, only) LLoyd The Harbor Freight tool only turns up to 56,000 rpm. Dan |
Drilling itty bitty holes
On Sat, 09 Apr 2011 16:28:35 -0500, F. George McDuffee wrote:
On Sat, 09 Apr 2011 13:37:44 -0700, Tim Wescott wrote: SNIP Not that many -- and I'd really like to drill the piece in the lathe, as part of a bunch of turning. I think a sensitive chuck is the way to go. SNIP Something that worked well for me was to adapt a pen vise. Get a drill blank that is a close fit in the hole in the handle, chuck the drill blank in the tail stock and slide the pin vise over this. While this does not transmit any torque, this is an advantage as you can feel how the drill is biting and "peck" very easily. Also good as a miniature tap wrench. I used mine mainly to make up special length drop indicator extensions [4-48 #42 tap drill] I think that'll work. I think I'll try it, in fact. -- http://www.wescottdesign.com |
Drilling itty bitty holes
Tim Wescott wrote:
I just messed up my only #71 drill bit -- boo hoo. What's the name of the gizmo that you use when you have a Great Big Drill Press, and you need to drill an itty bitty hole? Dremel Rotary Tool Work Station. ;-) http://www.amazon.com/Dremel-Moto-to.../dp/B0000302Y5 Cheers! Rich |
Drilling itty bitty holes
On Sat, 09 Apr 2011 19:58:51 -0500, Tim Wescott
wrote: On Sat, 09 Apr 2011 16:28:35 -0500, F. George McDuffee wrote: On Sat, 09 Apr 2011 13:37:44 -0700, Tim Wescott wrote: SNIP Not that many -- and I'd really like to drill the piece in the lathe, as part of a bunch of turning. I think a sensitive chuck is the way to go. SNIP Something that worked well for me was to adapt a pen vise. Get a drill blank that is a close fit in the hole in the handle, chuck the drill blank in the tail stock and slide the pin vise over this. While this does not transmit any torque, this is an advantage as you can feel how the drill is biting and "peck" very easily. Also good as a miniature tap wrench. I used mine mainly to make up special length drop indicator extensions [4-48 #42 tap drill] I think that'll work. I think I'll try it, in fact. I use a an overrun small 12v DC motor fitted with a pin chuck and mounted in a housing which has an extension that slides freely in the tailstock chuck. This gives me a high speed (15,000 RPM) tailstock drill. Since I manually feed the motor housing I can directly feel both drill torque and feed pressure. A JPG is in the drop box under the heading "Tailstock Drill chuck" Jim |
Drilling itty bitty holes
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Drilling itty bitty holes
On Sun, 10 Apr 2011 22:23:53 -0700, Winston
wrote: wrote: (...) A JPG is in the drop box under the heading "Tailstock Drill chuck" I don't see anything between: http://www.metalworking.com/dropbox/tailstock4.JPG and http://www.metalworking.com/dropbox/TakHeadstock.txt What am I doing wrong, Jim? --Winston Nothing! The JPG and accompaning text file were posted to the drop box but have't appeared yet. Not sure of the reason for the delay so I've posted duplicate files to http://www.flickr.com/photos/12206624@N04/5608853279/ |
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