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Re: Dumb question dept.
This will give you a pretty good idea of how they're used. Note, also, that they can go in 90 degrees from the boring bar that's mounted in the photo, for cutting really large holes. It will take a LONG while to do something like that. They will also chatter like mad given half a chance. Folks who do work like that regularly have special tooling for that purpose.? They can be used in a lathe or a milling machine, depending on what shank they are mounted on. Some come with an assortment of shanks, and some come alone, and you buy the shanks you want. That's way cheaper than buying a boring head with a fixed shank for each type and size. I've got machines that use MT4, MT3, MT2, R8, and a specialty bore on the SB Heavy 10L that is about an MT4.5 or so.? For a Unimat, the Swiss-cheese holder that you mentioned is going to be fine, but it, too, will allow chatter easily. But if you need a specific size hole, and don't have appropriate bits AND REAMERS, you'll need an assortment of boring bars. Drill bits do not drill accurate holes. The practice, when you need a perfectly sized hole, is to drill 1/64" or so undersized, and then ream. Imperial reamers come in the standard fractional sizes, and also over/under reamer sets, with pairs, one .001" over sized, and one .001" undersized., I've got a couple sets of imports, and still have nearly $200 in them. Plus assorted reamers that don't fit in the sets. Bear in mind, of course, that I have CDO, and aspirations. ;) Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 01:26:38 PM CDT, Peter Brooks <peter@...> wrote:
I have another newbie question - boring bars.? I have recently got (used) some 'proper' boring bars. What a difference compared to the carbide insert variety I was trying to use before! 1) They have round shanks with a flat. I'm assuming they fit into a holder with a circular hole, secured with a grub screw (a bit like UnimatMatt's 'Swiss Cheese' holder). The shank diameters however are (mm) 5.2, 6.6, 8.2 and 8.3. which equates roughly to 7/32,? 17/64, and 21/64 in Imperial. What's going on? These drill sizes are no doubt available but they can't be particularly common... 2) If the boring bars fit into a holder with a hole and a grub screw (from the top) to secure then they will be cutting (internally) on the opposite side of the work to normal cutting. This is fine (as the cutting action is the same as normal external cutting) but I just wonder if it is the intended method of operation. Thanks! |
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Re: Off Topic measuring units of whiskey
I am technically retired. Twice. Once from the USAF, after 24 years of service, and again due to Covid-19. Lost my job just a bit before my 65th birthday. Along with about half my co-workers, most of whom had minor children at home, and no job very suddenly. One had just bought a car, which he had needed to get to work. I looked at competing with them for the very few jobs available, and decided to apply for Social Security that day. Had my first check exactly a month later. I had income from the USAF already, plus my work, so I'd been making around $66K annually. Down to less than half of that now, and if my wife and I were a bit healthier, I suspect I'd be getting a bit more done in the shop. ;)? Though I've sitting here at the keyboard for half the morning, so that's not necessarily a good bet. I do have some ingots of ZA12 sitting here. And most of the stuff to make a popcorn-can furnace. And Mike Porter's book on making burners or foundry and forges. Plus a couple of the smaller burners, one that I've already assembled, and one that could be done in a day. They'd be about right for a #10 can furnace... Got crucibles to fit both...? Need to get away from the computer! Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 12:51:08 PM CDT, Martin P. via groups.io <mdupreno1@...> wrote:
I have a chest in my garage with all sorts of metal pieces for that mythical time when I "retire". Even some Zamak! Martin P.
On Thursday, September 21, 2023 at 01:47:06 PM EDT, Bill in OKC too via groups.io <wmrmeyers@...> wrote:
I have decided to collect precious metals, instead. Steel, brass, copper, lead, nickel, and tin. Maybe a bit of zinc. :) Bill in OKC |
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Re: Off Topic measuring units of whiskey
I wasn't at all fond of Scotch. Friend/coworker and room mate, when I was a young guy, drank Passport Scotch. About the cheapest, nastiest, most worthless stuff you could buy, in Clovis, NM. Colored my perception of Scotch Whiskey for about a decade. After I pushed Send on the last email, I found a bottle of 30 YO Macallan for only $6000. Only 3 bottles left. If it was truly the elixir of life, I might be willing spend that kind of money... But I'd have to try it on my wife, first. ;) Dad mostly drank Johnny Walker Black. I include that in my use of the word "rotgut." :) I have decided to collect precious metals, instead. Steel, brass, copper, lead, nickel, and tin. Maybe a bit of zinc. :) Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 12:16:13 PM CDT, Martin P. via groups.io <mdupreno1@...> wrote:
Lucky for me. 1) don't particularly care for Scotch, and 2) am not a connoisseur. So I am happy with Southern Comfort, about $20 for 1.75 L of the 80 proof variety. Martin P.
On Thursday, September 21, 2023 at 12:09:59 PM EDT, Bill in OKC too via groups.io <wmrmeyers@...> wrote:
. . . 50 YO Macallan Scotch whiskey . . . was the only alcoholic beverage I've ever REALLY liked. Less than a year ago, I considered perhaps starting to drink something like that again. The 15 YO Macallan I could get on base tax-free was $115 for a 750ml bottle. Decided, once again, that I cannot afford any more expensive hobbies. |
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Re: DC Motor for unimat SL
I know at least one person fitted a Unimat SL (IIRC) as a CNC machine, but I don't know if they used a stepper on the spindle. John Dammeyer has done something he calls an Electronic Lead Screw, that controls the leadscrew, and uses a 1PPR sensor on the spindle to allow threading, and even tapering without a QCGB or even change gears. Seems to me he's put servo motors on the spindle of some of his machines. His device was designed in 2007, so many of the parts are no longer available,? but he's working on a more modern version that uses a PIC32 controller. Higher resolution sensors are available for spindles, now, too.? There are several other ELS systems as well. Clough42 on Youtube has one, and there are a couple of? others on Groups.io, as well. Some of the folks at Digital Hobbyist are doing something similar for the mini-lathes and mini-mills.? William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 11:25:27 AM CDT, Carl <carl.blum@...> wrote:
Hi Gang: Has anyone tried fitting a stepping motor to the Unimat? I put one on my trail lift, and during the set up I loaded the "sketches" for speed control in the Arduino. It looks like it could be a full torque motor at any speed. Of course the next step would be mounting it with a timing belt, adding a stepper to the lead screw so you could do CNC threading! Carl. |
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Re: What on earth are these?
Yep. Long, long, ago, and far, far away, and in another universe, I was seriously interested in becoming a jewelry maker. Long story short, it didn't work out. I've done some minor repairs, and occasionally add another jewelry making tool or material to the project stash, but haven't done anything else about it in several decades. I've finally learned enough to make such things. But the metal to do it right would cost a great deal more than one of the import sets. At age 68, for the little use I'd get out of them, it would give me something to do, but cost way more than a quick trip to Harbor Freight. ;) If the situation changes, and I luck upon a larger stash of materials, I might just rethink the whole deal, but a .5x2x12 inch piece of 4140 steel just cost me $45 and change. I might have enough drill rod (silver steel for those in the UK) to do such a project, but I have other plans for that materiel, too! Choices, choices!? Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 11:23:35 AM CDT, Nick Clarke <nickc@...> wrote:
They are used to tap thin metal down into a block like this ? ? Or onto a rubber and steel pad ? ? Nick ? From: [email protected] [mailto:[email protected]] On Behalf Of Peter Brooks ? Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related. |
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Re: DC Motor for unimat SL
¿ªÔÆÌåÓýHi Gang: Has anyone tried fitting a stepping motor to the Unimat? I put one on my trail lift, and during the set up I loaded the "sketches" for speed control in the Arduino. It looks like it could be a full torque motor at any speed. Of course the next step would be mounting it with a timing belt, adding a stepper to the lead screw so you could do CNC threading! Carl. |
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Re: What on earth are these?
¿ªÔÆÌåÓýThey are used to tap thin metal down into a block like this ? ? Or onto a rubber and steel pad ? ? Nick ? From: [email protected] [mailto:[email protected]] On Behalf Of Peter Brooks ? Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related. |
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Re: Off Topic measuring units
Which system? 100¡ãF is lukewarm, or just a bit over average body temperature. 100¡ãC is boiling water. Neither is perfect for a drink. IMO, anyway! :) I'm not much of a whiskey drinker, but if you're buying something better than rotgut, you may just want to drink it at 100¡ãF, since that will give you the best flavor. And at?100¡ãC Whiskey is going to be mostly flammable vapor and a bit of boiling water...? ;) Once upon a time, a friend held a wake for his grandmother, who had just passed. He served 50 YO Macallan Scotch whiskey. And it was the only alcoholic beverage I've ever REALLY liked. Less than a year ago, I considered perhaps starting to drink something like that again. The 15 YO Macallan I could get on base tax-free was $115 for a 750ml bottle. Decided, once again, that I cannot afford any more expensive hobbies. Gotta save all my money for machine tools and metals... ;) Bill in OKC? William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 11:35:37 AM CDT, carlos vasco <carles.vasco@...> wrote:
I may disagree, 0 is the temperature of your perfect whiskey, 100 your perfect tea! Carlos On Tue, 19 Sept 2023 at 16:39, Carl <carl.blum@...> wrote:
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Re: DC Motor for unimat SL
Dave, either will be more powerful than the stock motors. I've seen someone on one of the 7x mini-lathe groups put a 3hp treadmill? motor on a 7x Mini-lathe. The only problems you'd have doing that are fitting the thing, and getting the speeds you need, and what can happen if you crash the machine. ?A smaller motor should be a bit easier to mount, though you might still have problems getting the speeds you need, and it won't do as much damage if you crash it.? They make 600watt and larger scooter motors, too, if you really want to go that way. I believe the reason so many folks go for the 150watt motors is that they're so readily available, and still reasonably cheap, while being unlikely to do serious damage.? When I got mine, they were up to around $30, where the 600watt motor was around $60 or so. I think the folks I bought my motor from now want about $50. I didn't want to go crazy with the horsepower, but did want something that could work as long as I could stand to work on it. If the 120watt motors had been either a lot more available or a lot cheaper, I'd probably have gone for them.? The stock motors are 90 or 100 watts. 1.5 or 2x the power seems more reasonable to me than 6x or more. But the guy who put the 3HP treadmill motor on his mini-lathe was happy with it the last I heard. And those are usually rated for a 1/3 HP to 2/3 HP or so. 250 or 500 watts. And my South Bend Heavy 10L toolroom lathe came from the factory with a 3/4 HP motor. 1HP is about 746 watts.? As they say, "You pay your money, and you take your chances." And availability trumps a lot of other factors! HTH William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 07:03:34 AM CDT, David James via groups.io <davebjames@...> wrote:
All the conversions I've seen everyone is using the 24v DC x 150W scooter motor. I can only find a 24v DC x120W motor locally and ordering online to the island of Borneo takes for ages and costs an arm and a leg. My question is would the 120W scooter motor do the job or do I need the 150W version? Dave |
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Re: What on earth are these?
¿ªÔÆÌåÓýThey are Dapping /Doming punches .?
From: [email protected] <[email protected]> on behalf of Bill in OKC too via groups.io <wmrmeyers@...>
Sent: Tuesday, September 19, 2023 9:55:47 PM To: [email protected] <[email protected]> Subject: Re: [Unimat] What on earth are these? ?
? though I searched as dapping
block set
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 12:20:35 PM CDT, Charles Kinzer <ckinzer@...> wrote:
I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be
offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:
Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts
Regards,
Adrian
On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:
That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?
A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?
From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM To: [email protected] <[email protected]> Subject: [Unimat] What on earth are these? ?
Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related.
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Re: What on earth are these?
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-------- Original message -------- From: Peter Brooks <peter@...> Date: 19/09/2023 18:01 (GMT+00:00) Subject: [Unimat] What on earth are these? |
Bill in OKC too
Carl