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#1
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Forstner bits
I wanted to counterbore several 3/4" holes about an eighth of an inch
deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. |
#2
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Forstner bits
On Jun 20, 5:21*pm, Richard Evans wrote:
I wanted to counterbore several 3/4" holes about an eighth of an inch deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. It's just about impossible to hold your hand drill at exactly straight up and down anda forstner has to be absolutely straight to cut. I've been able to do it by slightly altering the angle a little bit, all the way around the compass. With a hand drill it's a royal pain. You can get better results with one of those hand drill guide jig things that essentially make your hand drill into a little mobile drill press but it's still a royal pain. Sometimes it's the only way, though. And yes, those lowe's bits probably aren't all that sharp to begin with. My sister gave me a set one Christmas. It's nice having all those sizes but every time I have to drill a lot of holes I end up burning out the bit and buying one that costs about as much as the set. Still, it really is nice to have all those sizes and they work if I don't push them too hard. :-) |
#3
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Forstner bits
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#4
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Forstner bits
"Richard Evans" wrote in message ... I bought a set of Forstner bits at Lowe's, Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I think you already know the answer since you typed the above. Even a cheap set at Woodcraft is sharp enough for a few holes. |
#5
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Forstner bits
On Jun 20, 6:21*pm, Richard Evans wrote:
I wanted to counterbore several 3/4" holes about an eighth of an inch deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. Was it turning in the right direction? Are you sure? John Martin |
#6
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Forstner bits
FOstner bits are not made to be used a high RPM. Check the bit, it
should have some info about max rpm recommendations. I found this out the hard way. John Martin wrote: On Jun 20, 6:21 pm, Richard Evans wrote: I wanted to counterbore several 3/4" holes about an eighth of an inch deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. Was it turning in the right direction? Are you sure? John Martin |
#7
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Forstner bits
John Martin wrote:
On Jun 20, 6:21*pm, Richard Evans wrote: I wanted to counterbore several 3/4" holes about an eighth of an inch deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. Was it turning in the right direction? Are you sure? Yes, and yes. |
#8
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Forstner bits
I found myself having to make a 1.5" to 2" adapter ring tonight, and
used a forstner bit and hole saw to do it, in a scrap piece of full 3/4" birch ply. Since I had the forstner bit out and I remembered your post, I chucked it up in my dewalt drill afterwards. I clamped a scrap 2x4 stud cutoff to the bench, and in about 60 seconds (and much swearing/trying to keep the bit perpendicular) I managed to make just over a 1/8" impression. By comparision, drilling completely through the ply took about 30 seconds at 580rpm on the drill press. (Probably could have done it faster, but I just kept even pressure and backed out occasionally for the waste.) So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler Marietta, GA Richard Evans wrote: John Martin wrote: On Jun 20, 6:21 pm, Richard Evans wrote: I wanted to counterbore several 3/4" holes about an eighth of an inch deep in 3/4" plywood. I bought a set of Forstner bits at Lowe's, chucked the 3/4" one in a corded 1/2" drill, and made a practice swipe at a piece of pine. It was incredibly hard going. I really had to lean on it. I did manage to get down to about an eighth of an inch, both in the pine and eventually in the plywood, but I don't know what it would have taken to drill all the way through. I tried several diameters and they were all the same. Did I get a crappy set of bits, or are they not meant to be used in a hand drill? I don't have a drill press to make a comparison. Was it turning in the right direction? Are you sure? Yes, and yes. |
#9
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Forstner bits
Richard,
I don't wish to seem contrary to other posters here... but a forstner style bit can easily be used in a hand drill. And I said "forstner style" because there are a few configurations of bits on the market commonly referred to as "forstner". My guess is that your bits are not sharp. I purchased a set of Chiwanese made bits from Harbour Freight (24 bits in a wooden box for 20 bucks) that couldn't cut cheese. That is, until I sharpened every last one of 'em. You can sharpen them with a fine toothed round file and a fine grit stone (for the circumference). Diamond hones and India slip stones work well too. And lots of patience!!! (especially for the small ones). After sharpening, they cut like butter. Except not for long. The steel is low quality so they don't hold an edge very well. Also, use a slow speed to keep friction to a minimum (variable speed drill) and try to stay as perpendicular as possible. To really appreciate how well a "forstner" bit can cut in a hand drill, invest in a Freud bit. They're sharp right out'a the box. But there's no denying that a drill press works best. Cheers. Michael -- Message posted via CraftKB.com http://www.craftkb.com/Uwe/Forums.as...rking/200806/1 |
#10
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Forstner bits
On Jun 25, 11:06*pm, Jason wrote:
So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. It shouldn't take any great amount of force to get them to cut. I presume you're referring to a steel bit as opposed to a "carbide" one. John Martin |
#11
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Forstner bits
"Jason" wrote birch ply. Since I had the forstner bit out and I remembered your post, I chucked it up in my dewalt drill afterwards. So.. my answer is "No, they ain't ment to be used in a drill." Sharpen the one you have, or buy yourself a better bit. I routinely use forstner bits in hand drills with no problem ... everything from drilling holes in kitchen cabinets for electrical/plumbing pathways during installation, to more delicate jobs like drilling depressions for figure 8 fasteners in the edge of table aprons. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#12
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Forstner bits
"John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#13
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Forstner bits
John Martin wrote:
On Jun 25, 11:06 pm, Jason wrote: So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. It shouldn't take any great amount of force to get them to cut. I presume you're referring to a steel bit as opposed to a "carbide" one. Yes, exactly right on both counts. I ment carbide, and yes, my problem was keeping the bit from skating around. As I said originally, I stopped after a minute. However, once I got past the 1/8th inch mark I had enough of a "go" to where I could have continued on, since the bit was sharp enough. I didn't though, since I was already "job done" on the drill press. Jason Buckler Marietta, GA |
#14
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Forstner bits
I bought some High Speed Steel wood bits from an online vendor of some
repute (the name of which escapes me) and was impressed when removing the plastic coating each tip had been dipped in as I sliced my finger on the bit as I removed the coating. They worked wonders in the wood, too! I bought HFT "Forstner" bits and another set from one of those mobile vendor "Tool Sales" and one from Bosch (at Lowes). The Bosch was more expensive (35mm?) than was the first set of six from HFT and the larger set (to 2.5") from the mobile vendor. I use a drill press - mostly, But I have used them in "electric drills" from time to time with decent results - certainly nothing to complain about. Having said that, I wonder if anyone has any experience with a HSS set from Hartville Tools, or another vendor as I would love to buy a set as sharp as the bits first referenced, above, in the Forstner style. PS, the Irwin Auger Bits with Three (3) flutes are a joy to use. In my 14.4VDC Sears drill *shorter than my 19.2VDC model, with less torque/ power" I was easily able to "punch" holes through the floor joits to run my wiring "out of the way." They have that screw starter point and pull themselves through leaving a nice clean hole, If you hit a nail enroute, however, they suffer significantly! |
#15
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Forstner bits
On Jun 26, 7:08*am, "Swingman" wrote:
"John Martin" *wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. *If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by *the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. The Forstners I use are almost all by Connecticut Valley, BGI or PM - companies that have been making them for well over 100 years. Machine shanks and bit brace shanks. Some have small points that extend below the rim, some don't. On none of them does the center point extend more than about 1/16" below the rim. Of those that don't, some never did - it's not a re-sharpening mistake. The Forstner bits are meant to be guided by their rims, not their center points. I even checked a couple of really big Forstners I have - 2-5/8" and 2-3/4", 3/4" shanks, about a foot long. Conn Valley, but they don't show them in their product list anymore. Original factory grinds. Each has a central point, but it's flat-topped and about 1/4" wide - it's certainly not intended to guide the bit. With the brace bits, one trick is to turn them backward at first to get the rim to dig in slightly before you start to cut. I've got no idea what was in Benjamin Forstner's original patents - all I know is that the companies that have been making them from the beginning have been making them without center points large enough to significantly guide them. They do help in getting them on the center mark, but that's about it. If you had a gimlet point, you wouldn't get a flat-bottomed hole, would you? John Martin |
#16
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Forstner bits
"John Martin" wrote in message ... On Jun 26, 7:08 am, "Swingman" wrote: "John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. The Forstners I use are almost all by Don't be so naive. Just because someone calls/sells a bit as a "forstner", does not make it so. Once again, a true "Forstner" bit, BY DESIGN, has a point to guide the center of the initial drilling. This is an inarguable FACT, deal with it. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#17
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Forstner bits
Swingman wrote:
"John Martin" wrote in message ... On Jun 26, 7:08 am, "Swingman" wrote: "John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. The Forstners I use are almost all by Don't be so naive. Just because someone calls/sells a bit as a "forstner", does not make it so. Once again, a true "Forstner" bit, BY DESIGN, has a point to guide the center of the initial drilling. This is an inarguable FACT, deal with it. Not in the original patent, but others dated later do have the point. Ben sure liked drill bits! (I hope the link works) http://www.google.com/patents?id=FtRDAAAAEBAJ&pg=PP1&dq=BENJAMIN+FORSTNE R&source=gbs_selected_pages&cad=0_1#PPP1,M1 MikeB |
#18
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Forstner bits
On Jun 27, 11:50*am, "Swingman" wrote:
"John Martin" wrote in message ... On Jun 26, 7:08 am, "Swingman" wrote: "John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. *The Forstners I use are almost all by Don't be so naive. *Just because someone calls/sells a bit as a "forstner", does not make it so. Once again, a true "Forstner" bit, BY DESIGN, has a point to guide the center of the initial drilling. This is an inarguable FACT, deal with it. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious)- Hide quoted text - - Show quoted text - "Just because someone calls/sells a bit as a "forstner", does not make it so." I agree, but then I am so naive. If you bother re-reading my post, however, you'll see that the companies I mentioned were making Forstner bits well over 100 years ago, under license from Benjamin Forstner - the inventor. That's not a Forstner bit? Someone else has already posted a link to Benjamin Forstner's patent - # 115148, dated August 15, 1874. Rather than make you search for it, though, here is a quote from it: "The circular band serves to guide the bit accurately in its movement, and also give the hole that is bored a smooth and perfect finish. By its employment the gimlet-point may be dispensed with, and as the cutting lips do not project beyond its horizontal plane, it follows that the wood is not cut beyond the line operated upon by the circular cutting-edge of the band." And that, Swingman, is an inarguable FACT, with which you must deal. John Martin |
#19
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Forstner bits
"John Martin" wrote
"Just because someone calls/sells a bit as a "forstner", does not make it so." I agree, but then I am so naive. If you bother re-reading my post, however, you'll see that the companies I mentioned were making Forstner bits well over 100 years ago, under license from Benjamin Forstner - the inventor. That's not a Forstner bit? I stand corrected ... mea culpa. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#20
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Forstner bits
"bq340" wrote
Not in the original patent, but others dated later do have the point. Ben sure liked drill bits! He called it a "gimlet point" and it was added specifically to aid in centering the bit for drilling. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#21
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Forstner bits
Swingman wrote:
"John Martin" wrote in message ... On Jun 26, 7:08 am, "Swingman" wrote: "John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. The Forstners I use are almost all by Don't be so naive. Just because someone calls/sells a bit as a "forstner", does not make it so. Once again, a true "Forstner" bit, BY DESIGN, has a point to guide the center of the initial drilling. This is an inarguable FACT, deal with it. I'm quite certain I'm talking about a Forstner bit, and even with the center point, I still had skate issues. These are the ones I was using, straight from the Rockler store in Sandy Springs, GA: http://www.rockler.com/gallery.cfm?O...Select=Details They have they point. They are forstner bits. Yet, I had skate issues when the main body dug in, all probably due to RPM speed. My Dewalt doesn't have a lot of inbetween (14.4V 1/2" chuck, older model. It's either not enough, or too much.) That was my experience. I'll stick to using them in a drill press.. OR using them in a different drill. Jason Buckler Marietta, GA |
#22
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Forstner bits
On Jun 27, 12:53*pm, "Swingman" wrote:
"John Martin" wrote "Just because someone calls/sells a bit as a "forstner", does not make it so." *I agree, but then I am so naive. *If you bother re-reading my post, however, you'll see that the companies I mentioned were making Forstner bits well over 100 years ago, under license from Benjamin Forstner - the inventor. *That's not a Forstner bit? I stand corrected ... mea culpa. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Takes a man to say that, Swingman. Pax. I'll admit myself that I didn't know of Ben Forstner's later idea of a center point. I've never seen a Forstner with one large enough to keep it on center. I have sawtooth bits with large center points, but I wouldn't call those Forstners. Of the Forstners that I have that do have the center points, they are handy in visually centering a spinning bit on a mark, but that's about it. John Martin |
#23
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Forstner bits
"Jason" wrote
They have they point. They are forstner bits. Yet, I had skate issues when the main body dug in, all probably due to RPM speed. My Dewalt doesn't have a lot of inbetween (14.4V 1/2" chuck, older model. It's either not enough, or too much.) That was my experience. I'll stick to using them in a drill press.. OR using them in a different drill. If they skate on you out of the box, what you're experiencing is mostly the result of poor quality. Not surprising as Rockler's hardware quality seems to have suffered since the advent of importing. Next time you need a good Forstner of modern design (with the center spur), try the "Bormax" or "Famag" brands (you can now get both from WoodCraft): http://www.woodcraft.com/family.aspx?FamilyId=1917 http://www.woodcraft.com/family.aspx?FamilyId=778 The "Bormax" are a bit pricier (no pun intended) but have served me and I've used a ton of forstner bits, particularly the 35mm variety for drilling cabinet door hinges. The one I have now has drilled a couple of hundred cabinet doors and will still cut you when handling it. Famag was best of breed in a fairly recent FWW review. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#24
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Forstner bits
I may be over-simplifying but I think the center point is there to provide a
small reference pilot for true center if you need to extend a smaller diameter bit through for a bolt or dowel; at least that is what I have used it for over the last 40 years or so. As a kid and while going to colege, I worked in a production shop that did a lot of turnings, they used forster bits to set up the ends of the stock for the tail piece. I have always planned machining operations around that when working with wood. Not so often but also with plastics. I think that a couple of the operations even used modified bits to trip the top of legs outer diameter to uniform sizes so they would fit into the corresponding hole that was bored to receive it. BTW - new here since Verizon took away alt binaries pictures woodworking Thanks for having me Jay "John Martin" wrote in message ... On Jun 26, 7:08 am, "Swingman" wrote: "John Martin" wrote So.. my answer is "No, they ain't ment to be used in a drill." (For reference, I was using a Rockler steel - not carbon - forstner bit.) Jason Buckler They're not meant to be used in a hand-held drill only because there is no central point to locate the bit. If you don't hold them perfectly straight - and sometimes even if you do - they can skate all over the workpiece. Then your not talking about a "Forstner" bit ... proper Forstner bits indeed have a point, which is called the "gimlet point", as named by the man who invented the bit. --www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) Oh, I most definitely am. The Forstners I use are almost all by Connecticut Valley, BGI or PM - companies that have been making them for well over 100 years. Machine shanks and bit brace shanks. Some have small points that extend below the rim, some don't. On none of them does the center point extend more than about 1/16" below the rim. Of those that don't, some never did - it's not a re-sharpening mistake. The Forstner bits are meant to be guided by their rims, not their center points. I even checked a couple of really big Forstners I have - 2-5/8" and 2-3/4", 3/4" shanks, about a foot long. Conn Valley, but they don't show them in their product list anymore. Original factory grinds. Each has a central point, but it's flat-topped and about 1/4" wide - it's certainly not intended to guide the bit. With the brace bits, one trick is to turn them backward at first to get the rim to dig in slightly before you start to cut. I've got no idea what was in Benjamin Forstner's original patents - all I know is that the companies that have been making them from the beginning have been making them without center points large enough to significantly guide them. They do help in getting them on the center mark, but that's about it. If you had a gimlet point, you wouldn't get a flat-bottomed hole, would you? John Martin |
#25
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Forstner bits
Swingman wrote:
"Jason" wrote Yet, I had skate issues when the main body dug in, all probably due to RPM speed. My Dewalt doesn't have a lot of inbetween (14.4V 1/2" chuck, older model. It's either not enough, or too much.) That was my experience. I'll stick to using them in a drill press.. OR using them in a different drill. If they skate on you out of the box, what you're experiencing is mostly the result of poor quality. Not surprising as Rockler's hardware quality seems to have suffered since the advent of importing. Next time you need a good Forstner of modern design (with the center spur), try the "Bormax" or "Famag" brands (you can now get both from WoodCraft): http://www.woodcraft.com/family.aspx?FamilyId=1917 http://www.woodcraft.com/family.aspx?FamilyId=778 Cool, appreciate that info. I don't often find myself needing forstners (I'm just getting back into the swing of things, as it were), but the next time I need to do a bunch I'll invest in a couple of those. Thanks! Jason Buckler Marietta, GA |
#26
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Forstner bits
On Jun 27, 5:34 pm, "Swingman" wrote:
"Jason" wrote They have they point. They are forstner bits. Yet, I had skate issues when the main body dug in, all probably due to RPM speed. My Dewalt doesn't have a lot of inbetween (14.4V 1/2" chuck, older model. It's either not enough, or too much.) That was my experience. I'll stick to using them in a drill press.. OR using them in a different drill. If they skate on you out of the box, what you're experiencing is mostly the result of poor quality. Not surprising as Rockler's hardware quality seems to have suffered since the advent of importing. Next time you need a good Forstner of modern design (with the center spur), try the "Bormax" or "Famag" brands (you can now get both from WoodCraft): http://www.woodcraft.com/family.aspx?FamilyId=1917 http://www.woodcraft.com/family.aspx?FamilyId=778 The "Bormax" are a bit pricier (no pun intended) but have served me and I've used a ton of forstner bits, particularly the 35mm variety for drilling cabinet door hinges. The one I have now has drilled a couple of hundred cabinet doors and will still cut you when handling it. Famag was best of breed in a fairly recent FWW review. Skating seems to be a probelm with many brands of cheap Forstner bits. Oddly enough, this is one area where price really does seem to follow quality. Connecticut Valley, Famag and a couple of others have pretty much traditional patterns, but don't skate--if they're kept sharp. Some who wants to pay 30 or 40 bucks for a 16 bit set, should expect poor to fair (if they're lucky) out-of-the-box performance that improves with sharpening, but never equals, or even comes close, to the performance of the high end bits. Famag is new to me, but ConVaCo bits have been around since I started messing with wood back in the early '50s. Jeez. No wonder the kids seem to be aging. |
#27
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Forstner bits
"Charlie Self" wrote
Famag is new to me, but ConVaCo bits have been around since I started messing with wood back in the early '50s. IIRC, Famag is Austrian/German ... same inventive European engineering that is responsible for 99% of civilization's technological advances in the past few centuries. -- www.e-woodshop.net Last update: 5/14/08 KarlC@ (the obvious) |
#28
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Forstner bits
Swingman wrote:
If they skate on you out of the box, what you're experiencing is mostly the result of poor quality. Not surprising as Rockler's hardware quality seems to have suffered since the advent of importing. Next time you need a good Forstner of modern design (with the center spur), try the "Bormax" or "Famag" brands (you can now get both from WoodCraft): http://www.woodcraft.com/family.aspx?FamilyId=1917 http://www.woodcraft.com/family.aspx?FamilyId=778 The "Bormax" are a bit pricier (no pun intended) but have served me and I've used a ton of forstner bits, particularly the 35mm variety for drilling cabinet door hinges. The one I have now has drilled a couple of hundred cabinet doors and will still cut you when handling it. Famag was best of breed in a fairly recent FWW review. I picked up these Grizzly bits ($30 for 16 pc. set) after a magazine review. It may have been FWW but I can't remember. I've no complaints about their performance, and the price is very reasonable. http://grizzly.com/products/Forstner-Bit-16-pc-Set-Ground-Tips/H6334 |
#29
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Forstner bits
"Woodie" wrote in message Next time you need a good Forstner of modern design (with the center spur), try the "Bormax" or "Famag" brands (you can now get both from WoodCraft): http://www.woodcraft.com/family.aspx?FamilyId=1917 http://www.woodcraft.com/family.aspx?FamilyId=778 The "Bormax" are a bit pricier (no pun intended) but have served me and I've used a ton of forstner bits, particularly the 35mm variety for drilling cabinet door hinges. The one I have now has drilled a couple of hundred cabinet doors and will still cut you when handling it. Famag was best of breed in a fairly recent FWW review. I picked up these Grizzly bits ($30 for 16 pc. set) after a magazine review. It may have been FWW but I can't remember. I've no complaints about their performance, and the price is very reasonable. http://grizzly.com/products/Forstner-Bit-16-pc-Set-Ground-Tips/H6334 I have a similar cheap set. For the sizes that you only drill with one or three hoes a year, they are good and it is handy to have those sizes around "just in case". But the 3/8" and 3/4" that I use a lot have long been replaced with better ones that hold up longer. |
#30
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Forstner bits
John Martin wrote:
Someone else has already posted a link to Benjamin Forstner's patent - # 115148, dated August 15, 1874. Rather than make you search for it, though, here is a quote from it: The link is to an Feb 26 1886 patent which Benjamin Forstner clearly felt was an improvement and DOES include a cutting-point. A quote is under. So you are both right In the manufacture of in improved auger the slots b are formed by milling, thus facilitating the manufacture and lessening the expense which necessarily attended the manufacture of the bit made under my formerpatent. 1. In an auger, a circular peripheral cutting-edge formed of two parts, a a', each provided with a cutting-edge, e, inclined slots d, formed in opposite sides of the cutter, cutting-lips b,formed along the inclined slots, and a central cutting-point, e, joining the cutting-lips b, substantially as herein specified -- replace spamblock with my family name to e-mail me Pics at http://www.meekings.net/diving/index.shtml and http://www.meekings.net/photo-groups/nui/index.shtml |
#31
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Forstner bits - User error
Jason wrote:
(snipping lots of priors) I wrote: These are the ones I was using, straight from the Rockler store in Sandy Springs, GA: http://www.rockler.com/gallery.cfm?O...Select=Details They have they point. They are forstner bits. Yet, I had skate issues when the main body dug in, all probably due to RPM speed. My Dewalt doesn't have a lot of inbetween (14.4V 1/2" chuck, older model. It's either not enough, or too much.) That was my experience. I'll stick to using them in a drill press.. OR using them in a different drill. Um... Heh.. I made a booboo blunder. Was working on something else this morning and had reason to drill a few holes. Chucked a bit in the dewalt and commenced drilling... and realized it was drilling quite well - and fast. Turns out I had somehow changed the top speed switch from "1" to "2" and didn't notice. Hmm, I wonder. Fetched the aforementioned forstner bit, chucked it up, grabbed my scrap piece, and set the switch to "1". Guess what? More speed control, and I was able to drill in quite well and with only a little effort I was halfway through the scrap. More importantly - no skating! Morale of the story: user error on my part. So for precision holes freehand, I'll use a forstner in the drill (spade bits otherwise), but still prefer the drill press for 'em. Jason Buckler (typing with horked thumb in splint is fun!) Marietta, GA |
#32
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Forstner bits
I have these:
http://www.rockler.com/product.cfm?p...ilter=forstner they work great for me, and are opn sale right now for 60$ (The other set here is 70 shelly |
#33
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Forstner bits
" wrote:
It's just about impossible to hold your hand drill at exactly straight up and down anda forstner has to be absolutely straight to cut. Eh? No. I drill angled holes with forstners all the time. -- Doug |
#34
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Forstner bits
"Douglas Johnson" wrote in message ... " wrote: It's just about impossible to hold your hand drill at exactly straight up and down anda forstner has to be absolutely straight to cut. Eh? No. I drill angled holes with forstners all the time. -- Doug It depends on your skill level and experience. Many years ago I made rustic furniture. It was all made of planks held together with lag screws and large bolts. All had to have the pilot holes drilled and the head set beneath the surface. I drilled hundreds of holes with a hand drill almost every day. I got very good at drilling straight holes. So good, I used to make a little drinking money betting people I could drill holes as straight as they could with all their fancy guides. (And I did it much faster too.) I am certain that I lost some of that ability, but I can drill a pretty straight hole to this day. But I had lots and lots of practice. I ain't no woodworking natural or athlete. Just worked at it awhile. Like anything, if you do it enough, it looks easy and/or natural. |
#36
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Forstner bits
dpb wrote:
wrote: .... ... anda forstner has to be absolutely straight to cut. ... No, that's one of the advantages of a Forstner--it is guided by the rim and can do things like angle cuts, one side off the edge of the material, etc., etc., that others can't do. It does take a good quality bit which is both sharp and primarily runs perfectly true, however, and many of the inexpensive ones simply aren't finished well enough to do so... -- I second that and what Lee Michaels said in a previous post. I built a platerack last winter that used 60 1/2" holes for dowels. I don't own a drill press but used a Freud Forstner that drilled the holes nicely. As Lee said, it takes a bit of skill which needs to be developed, but once you do that, the holes came out as well as I wanted. Tanus |
#37
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Forstner bits
On Jun 30, 12:28 am, Searcher7 wrote:
On Jun 29, 11:56 pm, wrote: I have these: http://www.rockler.com/product.cfm?p...ilter=forstner they work great for me, and are opn sale right now for 60$ (The other set here is 70 shelly Wouldn't carbide be better than those for hardwoods? these are! |
#38
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Forstner bits
On Jun 30, 1:07*pm, Douglas Johnson wrote:
" wrote: It's just about impossible to hold your hand drill at exactly straight up and down anda forstner has to be absolutely straight to cut. Eh? *No. *I drill angled holes with forstners all the time. -- Doug It doesn't have to be straight to cut, as it will cut at any angle. And it will cut less than a full circle. It will do both of those nicely in a drill press. In a hand-held drill, if the bit is not perpendicular to the work, and if the bit lacks a substantial center point as most Forstners do, it is susceptible to skating. The rim contacts the work on one side, and the bit tries to walk away on the rim. Once the hole is started, it's fine. John Martin |
#39
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Forstner bits
On Jun 30, 11:58*pm, wrote:
On Jun 30, 12:28 am, Searcher7 wrote: On Jun 29, 11:56 pm, wrote: I have these: http://www.rockler.com/product.cfm?p...ilter=forstner they work great for me, and are opn sale right now *for 60$ (The other set here is 70 shelly Wouldn't carbide be better than those for hardwoods? these are! Not according to the post: "Pre-sharpened high carbon steel bits". I was going to pick some up.(They are not on sale anymore anyway). Darren Harris Staten Island, New York. |
#40
Posted to rec.woodworking
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Forstner bits
not sure.... I thought that is the same thing....
In any event, this set works fine for me. - and I have all the sizes In need. If I ever burn one up, I'll get a freud. shelly |
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