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dril a scp 486
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There are "printed circuit board drills" that I believe are carbide. Amazon has inexpensive ones.? Professional industrial ones cost more.? The are all quite brittle and easy to break.? They are usually used in CNC machines with multiple heads doing multiple boards at one time. Charles E. "Chuck" Kinzer
On Saturday, March 22, 2025 at 11:27:37 AM PDT, Jacques Savard via groups.io <jacquessavard@...> wrote:
399?/?5?000
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Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version
?
But impossible to drill a ho;e in the material
Normal drill for Metll Nothing
Drill Diamand for glass or stained glass Nothing barely trace
Probably epoxy
tre Do you have an idea please
Jack 47 71 it is exposy proly but very hard stouf Any Advise Please |
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Yes, try the carbide PCB drills. They're sharp and hard and will cut stuff that just laughs at high speed steel or even cobalt drills. BUT they are fragile and will break if you look at them sideways. You want to use them in a well centered chuck if you're using them on your lathe or a drill press with the part fixed so it can't move. I've drilled down to 0.6mm with them on my lathe.?
On Mar 22, 2025 at 2:41?PM -0400, Charles Kinzer <ckinzer@...>, wrote:
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I started with a .6 to 1.5mm set and then bought 10 pack replacements for some I did break, all from eBay.? I was drilling lots of small holes and was dulling them before I broke too many.? They probably would have been fine in a high RPM CNC machine but I could tell when they were getting a little dull in the lathe.? They were pretty affordable shipped from China, in the fifty to seventy five cents a piece range.? Several came with Chinese manufacture stickers over other stickers which revealed them to have originally been labeled as made in Japan.??♂?? Ryan
On Saturday, March 22, 2025 at 07:14:05 PM EDT, Roy via groups.io <roylowenthal@...> wrote:
There are also re-sharpened ones that are even cheaper. Unfortunately, one of the batches I bought were packaged with a piece of? plastic foam with the drills stuck into it, quite a few of them broke when the foam was removed. OTOH, I now have a lifetime supply of 1/8" carbide rods ?
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Roy
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开云体育1) I am curious as to why you want to drill a hole through a scrap 486 microprocessor. ? 2) The substrate for the microprocessor is very likely some type of ceramic material, so it is expected to be very hard and brittle. ? 3) Carbide “printed circuit” drills are meant for drilling holes in glass-epoxy circuit boards, not the ICs themselves.? Glass-fiber reinforced epoxy is very abrasive and will quickly dull a steel drill bit.? And yes, carbide is very brittle and will snap if there is any radial pressure on them. ? 4)? If you really want to make a hole through a 486, I suggest that you use a diamond encrusted burr of the same type that dentists use to grind (not drill) through tooth enamel.? If you cannot find one, ask your dentist if he will give you one that is not completely used up.? ? ? Good luck, ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of Ryan H via groups.io
Sent: Saturday, March 22, 2025 12:32 PM To: [email protected] Subject: Re: [7x12MiniLathe] dril a scp 486 ? Yes, try the carbide PCB drills. They're sharp and hard and will cut stuff that just laughs at high speed steel or even cobalt drills. BUT they are fragile and will break if you look at them sideways. You want to use them in a well centered chuck if you're using them on your lathe or a drill press with the part fixed so it can't move. I've drilled down to 0.6mm with them on my lathe.? On Mar 22, 2025 at 2:41?PM -0400, Charles Kinzer <ckinzer@...>, wrote: There are "printed circuit board drills" that I believe are carbide. ? Amazon has inexpensive ones.? Professional industrial ones cost more.? The are all quite brittle and easy to break.? They are usually used in CNC machines with multiple heads doing multiple boards at one time. ? ? Charles E. "Chuck" Kinzer ? On Saturday, March 22, 2025 at 11:27:37 AM PDT, Jacques Savard via groups.io <jacquessavard@...> wrote: ? ? 399?/?5?000 ? Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version ? But impossible to drill a ho;e in the material Normal drill for Metll Nothing barely trace Probably epoxy Do you have an idea please |
开云体育Keychain or similar I guess, maybe drawer pulls for a nerd cabinet. ? Never tried drilling one, but yeah diamond would be the go.? Maybe masonry or glass bits.? It’s a pretty common craft item. ? Another way to make a keychain was you’d unsolder all the pins and then solder a loop of wire back on.? ? Thinking about it, a cabinet with big chunky ICs as drawer pulls does sound pretty cool. ? Tony ? ? From: [email protected] <[email protected]> On Behalf Of Gerald Feldman via groups.io
Sent: Sunday, 23 March 2025 12:43 pm To: [email protected] Subject: Re: [7x12MiniLathe] dril a scp 486 ? 1) I am curious as to why you want to drill a hole through a scrap 486 microprocessor. ? 2) The substrate for the microprocessor is very likely some type of ceramic material, so it is expected to be very hard and brittle. ? 3) Carbide “printed circuit” drills are meant for drilling holes in glass-epoxy circuit boards, not the ICs themselves.? Glass-fiber reinforced epoxy is very abrasive and will quickly dull a steel drill bit.? And yes, carbide is very brittle and will snap if there is any radial pressure on them. ? 4)? If you really want to make a hole through a 486, I suggest that you use a diamond encrusted burr of the same type that dentists use to grind (not drill) through tooth enamel.? If you cannot find one, ask your dentist if he will give you one that is not completely used up.? ? ? Good luck, ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of Ryan H via groups.io ? Yes, try the carbide PCB drills. They're sharp and hard and will cut stuff that just laughs at high speed steel or even cobalt drills. BUT they are fragile and will break if you look at them sideways. You want to use them in a well centered chuck if you're using them on your lathe or a drill press with the part fixed so it can't move. I've drilled down to 0.6mm with them on my lathe.? On Mar 22, 2025 at 2:41?PM -0400, Charles Kinzer <ckinzer@...>, wrote: There are "printed circuit board drills" that I believe are carbide. ? Amazon has inexpensive ones.? Professional industrial ones cost more.? The are all quite brittle and easy to break.? They are usually used in CNC machines with multiple heads doing multiple boards at one time. ? ? Charles E. "Chuck" Kinzer ? On Saturday, March 22, 2025 at 11:27:37 AM PDT, Jacques Savard via groups.io <jacquessavard@...> wrote: ? ? 399?/?5?000 ? Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version ? But impossible to drill a ho;e in the material Normal drill for Metll Nothing barely trace Probably epoxy Do you have an idea please |
开云体育Perforate the chip with a LASER!
?in a CNC to run a circle pattern
round-and-round to achieve the desired hole size.
On 3/22/2025 2:27 PM, Jacques Savard
via groups.io wrote:
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I thought the hole was to be through the circuit board, not the chip itself.? The substrate is silicon which is rather hard.? It has a Mohs hardness of about 7.? Titanium is less hard at 5 to 6 as a comparison.? Tungsten carbide 9.? The silicon wafer is also much harder than regular glass. You probably not only need something like a diamond drill as mentioned, but perhaps even a means to cool it. One other thing.? The silicon wafer at the beginning of the semiconductor manufacturing process is about 1 mm thick.? Many wafers, after the devices have been deposited on them, go through a "backgrinding" process to remove much of the silicon wafer to make it thinner.? Then it is sliced up into individual chips and then packaged.? Thinning helps with heat distribution.? (I know this stuff because I was involved in designing semiconducting manufacturing equipment).? Therefore, the substrate might actually be quite thin. Charles E. "Chuck" Kinzer
On Saturday, March 22, 2025 at 09:15:44 PM PDT, Jon Rus via groups.io <byghtn5@...> wrote:
Perforate the chip with a LASER!
?in a CNC to run a circle pattern
round-and-round to achieve the desired hole size.
On 3/22/2025 2:27 PM, Jacques Savard
via groups.io wrote:
399?/?5?000
?
Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version
?
But impossible to drill a ho;e in the material
Normal drill for Metll Nothing
Drill Diamand for glass or stained glass Nothing
barely trace
Probably epoxy
tre
Do you have an idea please
Jack 47 71
it is exposy proly but very hard stouf
Any Advise Please
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开云体育Depends on the age on the CPU.? ? Most CPUs up to the first Pentiums were all ceramic – have fun drilling thru that.? Later ones shrunk the ceramic bit and have a “moat” of maybe 5-15mm of PCB that you can more easily drill thru.? These are the ones that tend to be made into keyrings. ? Modern CPUs drop the ceramic cover and instead have a metal cover over the entire chip, you can drill the edge of those. ? Depending on usage might be easier soldering a plate to the back of the chip. ? Tony ? From: [email protected] <[email protected]> On Behalf Of Charles Kinzer via groups.io
Sent: Sunday, 23 March 2025 3:31 pm To: [email protected] Subject: Re: [7x12MiniLathe] dril a scp 486 ? I thought the hole was to be through the circuit board, not the chip itself.? The substrate is silicon which is rather hard.? It has a Mohs hardness of about 7.? Titanium is less hard at 5 to 6 as a comparison.? Tungsten carbide 9.? The silicon wafer is also much harder than regular glass. ? You probably not only need something like a diamond drill as mentioned, but perhaps even a means to cool it. ? One other thing.? The silicon wafer at the beginning of the semiconductor manufacturing process is about 1 mm thick.? Many wafers, after the devices have been deposited on them, go through a "backgrinding" process to remove much of the silicon wafer to make it thinner.? Then it is sliced up into individual chips and then packaged.? Thinning helps with heat distribution.? (I know this stuff because I was involved in designing semiconducting manufacturing equipment).? Therefore, the substrate might actually be quite thin. ? Charles E. "Chuck" Kinzer ? ? ? On Saturday, March 22, 2025 at 09:15:44 PM PDT, Jon Rus via groups.io <byghtn5@...> wrote: ? ? Perforate the chip with a LASER! ? ?in a CNC to run a circle pattern round-and-round to achieve the desired hole size. ? ? ? ? ? ? ? ? On 3/22/2025 2:27 PM, Jacques Savard via groups.io wrote: 399?/?5?000 ? Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version ? But impossible to drill a ho;e in the material Normal drill for Metll Nothing Drill Diamand for glass or stained glass Nothing barely trace Probably epoxy tre Do you have an idea please Jack 47 71 it is exposy proly but very hard stouf Any Advise Please ? |
开云体育It also reduces the heat generated in the tooth and washes away the swarf from the operation.? Ultrasonic drills also use a mist spray for these same reasons (but they don’t utilize diamonds bonded on the “bit”. ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of Roy via groups.io
Sent: Sunday, March 23, 2025 4:33 PM To: [email protected] Subject: Re: [7x12MiniLathe] dril a scp 486 ? Diamond abrasive bits are actually diamond powder mechanically attached, not chemically bonded, to the bit body with nickel plating. When your dentist uses them, notice there's always a cooling water mist involved to protect the integrity of the bit. ? Roy |
开云体育Drilling a 486 CPU is like drilling glass, the 486 is probably harder.? Same technique would be needed, diamond drill, water, patience etc. ? Here’s an old page for making a keychain from a 486, basically solder a wire to the back.? ? https://web.archive.org/web/20010410093643/http://www2.apex.net/users/timwhita/keychain.html ? Not sure why they took a Dremel to the pins, you can unsolder those.? Note that the metal plate on the back of the chip is soldered on, unsolder that and fill it with resin so you can see the actual CPU. ? Tony ? ? ? From: [email protected] <[email protected]> On Behalf Of Jacques Savard via groups.io
Sent: Sunday, 23 March 2025 5:28 am To: [email protected] Subject: [7x12MiniLathe] dril a scp 486 ? 399?/?5?000 ? Résultats de traductionRésultat de traductionI have some cpu 486 or pentium vintage version ? But impossible to drill a ho;e in the material Normal drill for Metll Nothing barely trace Probably epoxy Do you have an idea please |
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