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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Questions about drills & taps.
Sure would be nice IMO if common drill sizes fit tap needs, or vice versa.
Oh well. Have researched and found equivalent tap drill charts. http://www.wit.edu/academics/csm/rou...rill_sizes.htm http://www.cloudsociety.org/Techs/May%202003.pdf http://www.offroaders.com/info/tech-...aps-drills.htm http://raskcycle.com/techtip/webdoc9.html I can find individual drills to match taps. I can find tap and die sets. I have a cheap set of taps. Where can I find a drill set (43, 38, 36, 29, 25, 20, 16, etc) to match taps? Sorry if any of my lingo is incorrect. BTW. Anyone know where to find a chart of closest standard drill sizes for tap sizes, please? I did the dividing and made my own little list, but would like to see someone else's. Nice group. Thanks in advance. |
#2
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Questions about drills & taps.
Mr. Doe
The first link cited by you gives the sizes of the numbered drills listed. I think what you are looking for is a NUMBERED drill set. These are standard items at better tool emporiums. look at MSC, Travers tool, or any of the other tool vendors. You may even find some sets on e-bay. What you would be looking for is a set from 1 to 60. lg no neat sig line. "John Doe" wrote in message ... Sure would be nice IMO if common drill sizes fit tap needs, or vice versa. Oh well. Have researched and found equivalent tap drill charts. http://www.wit.edu/academics/csm/rou...rill_sizes.htm http://www.cloudsociety.org/Techs/May%202003.pdf http://www.offroaders.com/info/tech-...aps-drills.htm http://raskcycle.com/techtip/webdoc9.html I can find individual drills to match taps. I can find tap and die sets. I have a cheap set of taps. Where can I find a drill set (43, 38, 36, 29, 25, 20, 16, etc) to match taps? Sorry if any of my lingo is incorrect. BTW. Anyone know where to find a chart of closest standard drill sizes for tap sizes, please? I did the dividing and made my own little list, but would like to see someone else's. Nice group. Thanks in advance. |
#3
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Questions about drills & taps.
Most industrial suppliers have tap and drill stands or cases. Hout is one
brand. They hold the tap drill, tap and some have a clearance drill also. |
#4
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Questions about drills & taps.
In article ,
John Doe wrote: Sure would be nice IMO if common drill sizes fit tap needs, or vice versa. Oh well. Have researched and found equivalent tap drill charts. http://www.wit.edu/academics/csm/rou...rill_sizes.htm http://www.cloudsociety.org/Techs/May%202003.pdf http://www.offroaders.com/info/tech-...aps-drills.htm http://raskcycle.com/techtip/webdoc9.html I can find individual drills to match taps. I can find tap and die sets. I have a cheap set of taps. Where can I find a drill set (43, 38, 36, 29, 25, 20, 16, etc) to match taps? The standard set of wire size drills (the number sizes) covers from #1 down to a #60. There is an additional set from #61 down through #80, but you are highly unlikely to need these for taps. There are good sets of taps and matching tap drills in indexes similar to drill indexes available (MSC is one of the places which sell them). This gets you the right size drills for the taps which come in the set -- but the set does not cover all sizes -- just a convenient collection of common sizes. These sets can be purchased at industrial hardware stores, but you are highly unlikely to find them in places like Home Depot. MSC is one mail order source which has a wide range of drills, and you can find these drill in all kinds of qualities, materials, and point styles. My own preference is high cobalt screw machine length with split points. You can get a pretty good idea of the quality by the price at a place like MSC. You can get 118 drill sets for as low as about $30.00 (That covers fractional sizes (in 1/64" steps), number sizes (1-60), and letter sizes (start where the #1 stops with the 'A' size, going up to 'Z' (still below 1/2" in size). The $30.00 sets are junk. An 118 bit set of reasonable quality "Made in USA" drills will probably sell for about $127.00 or so when on sale. The top end (Cleveland or similar) will probably go for about twice that. Scale the price down if all you want is the number sizes. Sorry if any of my lingo is incorrect. BTW. Anyone know where to find a chart of closest standard drill sizes for tap sizes, please? Those *are* the closest standard sizes -- unless by standard, you mean the closest *fractional* inch sizes. Those are not close enough to make good threads in a lot of the sizes. You can convert the fractional sizes to decimal by simple division. You can look up the number sizes (and the letter sizes) on the web -- each of them will be listed also as a decimal fraction equivalent. Note that the "standard" sizes are for a certain percentage thread depth. For more strength, you want a higher percentage, but that is more difficult to cut. For easier cutting (at the expense of strength), you can go for a lower percentage (a slightly larger drill bit). In either case, the nearest size for looser or tighter will also usually be a number size. The number (and letter) sizes were designed to fill in the gaps in between the fractional sizes (with the exception of an 'F' drill, which happens to match a 1/4" drill (0.250"). I did the dividing and made my own little list, but would like to see someone else's. There are such charts in various catalogs, including the MSC catalog -- and Starrett sells wall charts with the number, letter, and fractional sizes all in a single chart. Best of luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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Questions about drills & taps.
On Tue, 16 Dec 2003 02:29:58 GMT, John Doe wrote:
Sure would be nice IMO if common drill sizes fit tap needs, or vice versa. Oh well. Have researched and found equivalent tap drill charts. http://www.wit.edu/academics/csm/rou...rill_sizes.htm http://www.cloudsociety.org/Techs/May%202003.pdf http://www.offroaders.com/info/tech-...aps-drills.htm http://raskcycle.com/techtip/webdoc9.html I can find individual drills to match taps. I can find tap and die sets. I have a cheap set of taps. Where can I find a drill set (43, 38, 36, 29, 25, 20, 16, etc) to match taps? I'd buy them individually, 2 at a time. They break easy. Ron Thompson On the Beautiful Mississippi Gulf Coast USA http://www.plansandprojects.com When you hear the phrase "Super size that for ya?," they are really talking about your ass. |
#6
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Questions about drills & taps.
snip
to fill in the gaps in between the fractional sizes (with the exception of an 'F' drill, which happens to match a 1/4" drill (0.250"). snip An "E" drill is .250", not an "F" drill. Pretty minor nit to pick, but figured I'd point it out, anyway. Mike |
#7
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Questions about drills & taps.
In article ,
The Davenports wrote: snip to fill in the gaps in between the fractional sizes (with the exception of an 'F' drill, which happens to match a 1/4" drill (0.250"). snip An "E" drill is .250", not an "F" drill. Pretty minor nit to pick, but figured I'd point it out, anyway. You got me! I knew that I should have gone down to the shop to verify it -- or picked up my _Machinery's Handbook_. :-) Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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