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Re: 7x treading capabilities
It looks like the expanded threading capacity comes from going farther on the table of cuttable threads! If you look in the "files" section, you'll find tables showing that just about every integer thread pitch and reasonable metric approximations can be cut with the gears normally supplied. By adding a 21 tooth gear, several of the metric approximations are a little closer. Without a 21 tooth gear, usable threads are easy enough to cut.
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There are a few possible pitches that run into set up problems because the needed gears don't fit into the normal spacing rules: 72<A+B<134 88<C+D<138 Roy --- In 7x12minilathe@..., "chucketn" <chunk07@...> wrote:
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Re: 7x treading capabilities
--- In 7x12minilathe@..., Andy Franks <andyf.1108@...> wrote:
I presume the leadscrew pitch is the same, so if the HiTorque gear set is the standard one plus 21T and 32T, adding those to your standard set should give you the same choice of threads. That's what I'm trying to determine. Chris W., does the HiTorque come with a 32 tooth change gear? Chuck |
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Re: 7x treading capabilities
¿ªÔÆÌåÓý
Chuck, my guess is that?the LMS?HiTorque will cut a bigger range of inch threads than the standard Sieg C3. The comparision chart quotes?from 4 to 80 tpi as opposed to 12?to 52 tpi. ? As a general rule, a greater variety of change gears will increase the range of threads you can cut. I presume the leadscrew pitch is the same, so if the HiTorque gear set is the standard one plus 21T and 32T, adding those to your standard set should give you the same choice of threads. ? 4 tpi must be hard going, definitely needing a?handcrank, though with the gearing?4:1 against you,?cranking the leadscrew might be better.??And it might be easier?to use a die for some of the finer threads. ? ? Andy ? To: 7x12minilathe@... From: chunk07@... Date: Wed, 14 Nov 2012 15:57:22 +0000 Subject: [7x12minilathe] 7x treading capabilities ?
I was brousing information on threading capabilities on the 7x SIEG lathes. I was referred to the lathe comparison page on the LMS website at
I noticed the threading column lists a capability of 28 threads for the LMS HiTorque and 18 threads for all other listed SIEG lathes. How is this done? Does the 28 threads include the metric threads possible with the addition of a 21 tooth change gear? A 32 tooth change gear? Or are the gears in the drive train of the HiTorque different than the other SIEG lathes? I do understand there is no high/low gear in the HiTorque geer train. What I'm trying to figure out is , can I increase the threading capability of my MicroMark 7 x 14 to 28 threads by adding 21 and 32 tooth gears as mentioned on Or am I totaly confused and need another cup of coffee? Chuck |
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Re: choosing a lathe & accessories
MERTON B BAKER
I built my two from scratch, one with an internal collet clutch, and the other with a jam clutch. Both work, but I do most of my threading on the 12x36 because it's easier to change thread pitch with the LS gearbox. The hand cranks are still useful for odd cuts.
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Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of Jim Dunmyer Sent: Wednesday, November 14, 2012 8:54 AM To: 7x12minilathe@... Subject: Re: [7x12minilathe] choosing a lathe & accessories Mert, Building a crank for a 7X lathe is quite simple, I¡¯ve done 2 now, using 1/2¡± water pipe for the main ¡°shaft¡± portion, a hunk of 1/4¡± X 1¡± flat stock for the crank, and an aluminum round, 3/4¡± diameter, for the handle. There are several plans on the Internet. I¡¯ve done threading on my 7X lathes, and it¡¯s quite a bit easier by using the crank. It works surprisingly well. One other trick: when setting up the change gears, run a piece of newspaper between them to set the clearance. Wind out the paper, and the clearance is perfect. <<Jim>> From: MERTON B BAKER Sent: Wednesday, November 14, 2012 5:00 AM To: 7x12minilathe@... Subject: RE: [7x12minilathe] choosing a lathe & accessories small diameter. Threading is best done slowly, especially if you are a beginner, and even after cutting a lot of threads, I find the Sherline arrangement the best I've seen on a small lathe. Even on the 7x machines, it goes much simpler with a hand crank, especially so if you are threading up to a shoulder, as is frequently the case. LMS sells a good scissors type |
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7x treading capabilities
I was brousing information on threading capabilities on the 7x SIEG lathes. I was referred to the lathe comparison page on the LMS website at .
I noticed the threading column lists a capability of 28 threads for the LMS HiTorque and 18 threads for all other listed SIEG lathes. How is this done? Does the 28 threads include the metric threads possible with the addition of a 21 tooth change gear? A 32 tooth change gear? Or are the gears in the drive train of the HiTorque different than the other SIEG lathes? I do understand there is no high/low gear in the HiTorque geer train. What I'm trying to figure out is , can I increase the threading capability of my MicroMark 7 x 14 to 28 threads by adding 21 and 32 tooth gears as mentioned on Or am I totaly confused and need another cup of coffee? Chuck |
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Re: choosing a lathe & accessories
As to knurling, the Sherline tool does seem an odd design, and the instructions look a bit complicated, but it's probably easier to use than it looks.
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I use a "scissor" or "straddle" tool similar to this: < > Like the Sherline, it applies pressure from each side of the job. That is a good deal kinder to the lathe's spindle bearings than a traditional "bump" knurler, which is pushed against one side of the job by advancing the cross slide. Andy --- In 7x12minilathe@..., R Thompson <ve8rt@...> wrote:
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Re: choosing a lathe & accessories
Jim Dunmyer
¿ªÔÆÌåÓýMert,
Building a crank for a 7X lathe is quite simple, I¡¯ve done 2 now, using
1/2¡± water pipe for the main ¡°shaft¡± portion, a hunk of 1/4¡± X 1¡± flat stock for
the crank, and an aluminum round, 3/4¡± diameter, for the handle. There are
several plans on the Internet.
?
I¡¯ve done threading on my 7X lathes, and it¡¯s quite a bit easier by using
the crank. It works surprisingly well.
?
One other trick: when setting up the change gears, run a piece of newspaper
between? them to set the clearance. Wind out the paper, and the clearance
is perfect.
?
?????????????????????????????????????????????????????????????????????????????
<>
?
?
? From: MERTON B BAKER
Sent: Wednesday, November 14, 2012 5:00 AM
Subject: RE: [7x12minilathe] choosing a lathe &
accessories ?
?
small diameter. Threading is best done slowly, especially if you are
a |
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Re: choosing a lathe & accessories
On Tue, 13 Nov 2012, R Thompson wrote:
I like Vince's comment;Yeah, I have a wood lathe sitting here and no room for it due to thingsIf you buy it now and stash it away, you'll make room for it a lotIt sounds like advice from someone with experience. that don't belong in the shop but are (read: not mine!). Since the wood lathe showed up I'm getting pushier on getting this stuff out. Vince. -- Michigan VHF Corp. The Foggy Mist Emporium |
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Re: choosing a lathe & accessories
MERTON B BAKER
The Sherline threading att. is well designed, comes with gears for a lot of
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thread pitches, and from my experience with the 7xs & the Unis, it's a better idea. The hand crank is an excellent way to avoid excitement when cutting threads on any small lathe. Any lathe under 7" swing has to have its speeds in the high range, because most of the work done on them is of small diameter. Threading is best done slowly, especially if you are a beginner, and even after cutting a lot of threads, I find the Sherline arrangement the best I've seen on a small lathe. Even on the 7x machines, it goes much simpler with a hand crank, especially so if you are threading up to a shoulder, as is frequently the case. LMS sells a good scissors type knurling tool, just right for the 7Xs, & I'll bet that if you ask them they'll ship USPS Priority mail. My experience with United Parcel Smashers is less than perfect. They brought me 4 bandsaws before I got one that didn't have broken castings. Let us not mention bent backsplash panels, chip trays or cracked change gear covers on 7x lathes. Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of R Thompson Sent: Tuesday, November 13, 2012 10:45 PM To: 7x12minilathe@... Subject: [7x12minilathe] choosing a lathe & accessories The advice received here has been very helpful, and brought up a lot more questions. One of those of interest was on thread cutting, it looks like it may be a problem with the Taig lathe, while on the Sherline it seems that the motor comes off and the threads cut by using a hand wheel which has pros and cons. Another task I'd like to do is knurling. Sherline has a knurling attachment of an unfamiliar design, but I have not yet found out what type of tool is used on the Homier / Craftex. I'm having a little trouble finding information on a knurling tool. I like Vince's comment; If you buy it now and stash it away, you'll make room for it a lotIt sounds like advice from someone with experience. Finally, I'd consider buying a used lathe, but I think that the shipping costs would make it more expensive and a higher risk investment than getting a new one from Edmonton. Ron (in Yellowknife) ------------------------------------ Yahoo! Groups Links |
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Re: Hello from Yellowknife
lists
In article <F7049777D8D347CCA1A729102B3B14FE@johncb8ea879a5>,
John Bernoth <jbernoth1@...> wrote: Hi folk, I have found the best / cheapest place to get the Workshop PracticeThanks for that, they are indeed very good prices. -- Stuart |
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Re: Hello from Yellowknife
¿ªÔÆÌåÓýHi folk,
?
I have found the best / cheapest place to get the Workshop
Practice Series to be ??they post free world wide and were WAY cheaper than any where I
tried locally, i.e. here in OZ.?
Regards,
?
John
B? |
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choosing a lathe & accessories
R Thompson
The advice received here has been very helpful, and brought up a lot
more questions. One of those of interest was on thread cutting, it looks like it may be a problem with the Taig lathe, while on the Sherline it seems that the motor comes off and the threads cut by using a hand wheel which has pros and cons. Another task I'd like to do is knurling. Sherline has a knurling attachment of an unfamiliar design, but I have not yet found out what type of tool is used on the Homier / Craftex. I'm having a little trouble finding information on a knurling tool. I like Vince's comment; If you buy it now and stash it away, you'll make room for it a lotIt sounds like advice from someone with experience. Finally, I'd consider buying a used lathe, but I think that the shipping costs would make it more expensive and a higher risk investment than getting a new one from Edmonton. Ron (in Yellowknife) |
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Re: Hello from Yellowknife
¿ªÔÆÌåÓýMost stock Taigs only have a rack/pinion ... Some now come from the factory with a LS too....Added a LS to mine: MERTON B BAKER wrote: In reply to the question about the Sherlines. They suffer from the same reversible leadscrew and the necessity to crank the carriage back & forth with the LS. I assume this is true of the Taigs, but as I don't have one, I don't know. Mert -----Original Message----- From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of andyf1108 Sent: Tuesday, November 13, 2012 11:28 AM To: 7x12minilathe@... Subject: [7x12minilathe] Re: Hello from Yellowknife Hi Ron, Both the Craftex and Homier lathes are re-branded Siegs from China. The Sieg 7x lathes constitute the majority of the mini-lathes in the US and Canada, I think. There are a few from the Real Bull factory, sold by Big Dog in the US (this is beginning to sound like a farmyard). RBs differ in detail from Siegs, and have a few minor improvements in the way of oil ports and a fairy standard US speed control board rather than a Chinese one. Most of the important bits are interchangeable. Before plumping for a Taig (or a Sherline - another you might consider), check if it is as versatile as the Chinese offerings, and will do screwcutting, including LH threads, and pliain turning towards the tailstock, all of which require that the leadscrew be reversed while the spindle is still running forward. Also check if the carriage can be unlocked from the leadscrew so it can be run quickly along the bed using an apron handwheel working a rack and pinion. I simply don't know if Taigs and Sherlines offer these features. Andy --- In 7x12minilathe@..., R Thompson wrote: |
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Re: Hello from Yellowknife
MERTON B BAKER
In reply to the question about the Sherlines. They suffer from the same
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reversible leadscrew and the necessity to crank the carriage back & forth with the LS. I assume this is true of the Taigs, but as I don't have one, I don't know. Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of andyf1108 Sent: Tuesday, November 13, 2012 11:28 AM To: 7x12minilathe@... Subject: [7x12minilathe] Re: Hello from Yellowknife Hi Ron, Both the Craftex and Homier lathes are re-branded Siegs from China. The Sieg 7x lathes constitute the majority of the mini-lathes in the US and Canada, I think. There are a few from the Real Bull factory, sold by Big Dog in the US (this is beginning to sound like a farmyard). RBs differ in detail from Siegs, and have a few minor improvements in the way of oil ports and a fairy standard US speed control board rather than a Chinese one. Most of the important bits are interchangeable. Before plumping for a Taig (or a Sherline - another you might consider), check if it is as versatile as the Chinese offerings, and will do screwcutting, including LH threads, and pliain turning towards the tailstock, all of which require that the leadscrew be reversed while the spindle is still running forward. Also check if the carriage can be unlocked from the leadscrew so it can be run quickly along the bed using an apron handwheel working a rack and pinion. I simply don't know if Taigs and Sherlines offer these features. Andy --- In 7x12minilathe@..., R Thompson <ve8rt@...> wrote:
------------------------------------ Yahoo! Groups Links |
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Re: Hello from Yellowknife
Hi Ron,
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Both the Craftex and Homier lathes are re-branded Siegs from China. The Sieg 7x lathes constitute the majority of the mini-lathes in the US and Canada, I think. There are a few from the Real Bull factory, sold by Big Dog in the US (this is beginning to sound like a farmyard). RBs differ in detail from Siegs, and have a few minor improvements in the way of oil ports and a fairy standard US speed control board rather than a Chinese one. Most of the important bits are interchangeable. Before plumping for a Taig (or a Sherline - another you might consider), check if it is as versatile as the Chinese offerings, and will do screwcutting, including LH threads, and pliain turning towards the tailstock, all of which require that the leadscrew be reversed while the spindle is still running forward. Also check if the carriage can be unlocked from the leadscrew so it can be run quickly along the bed using an apron handwheel working a rack and pinion. I simply don't know if Taigs and Sherlines offer these features. Andy --- In 7x12minilathe@..., R Thompson <ve8rt@...> wrote:
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Re: Hello from Yellowknife
MERTON B BAKER
Further, you'll find the Taig is both more and less versatile, and a LOT
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smaller, even though its motor is a LOT more powerful. Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of R Thompson Sent: Tuesday, November 13, 2012 9:26 AM To: 7x12minilathe@... Subject: Re: [7x12minilathe] Re: Hello from Yellowknife Thanks for those titles too Andy. Last night I put an order in to Lindsay Books. Arceurotrade is next on the things to do list. I visited the Busybeetools website and was looking over their Craftex CX04 lathe, which apparently is a re-branded Homier 7X12 lathe. They have it on sale at the moment for $699 (reg. $899) and I was wondering if I should impulse buy that while it is on sale and stash it away until I have room for it. My preference is to buy North American or European made products, so I've been looking at the Taig machines too. Well I won't be buying anything much if I don't get out the door and get to work. Ron On Tue, 2012-11-13 at 10:27 +0000, andyf1108 wrote:
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Re: Hello from Yellowknife
MERTON B BAKER
FWIW, I paid $300 US + shipping for my Homier 7x12, but it was a long time
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ago when the dollar hadn't shrunk nearly as much as it has now. Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of R Thompson Sent: Tuesday, November 13, 2012 9:26 AM To: 7x12minilathe@... Subject: Re: [7x12minilathe] Re: Hello from Yellowknife Thanks for those titles too Andy. Last night I put an order in to Lindsay Books. Arceurotrade is next on the things to do list. I visited the Busybeetools website and was looking over their Craftex CX04 lathe, which apparently is a re-branded Homier 7X12 lathe. They have it on sale at the moment for $699 (reg. $899) and I was wondering if I should impulse buy that while it is on sale and stash it away until I have room for it. My preference is to buy North American or European made products, so I've been looking at the Taig machines too. Well I won't be buying anything much if I don't get out the door and get to work. Ron On Tue, 2012-11-13 at 10:27 +0000, andyf1108 wrote:
------------------------------------ Yahoo! Groups Links |
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Re: Hello from Yellowknife
If you buy it now and stash it away, you'll make room for it a lot
sooner than first making room and then buying it. On Tue, 13 Nov 2012, R Thompson wrote: Thanks for those titles too Andy. Last night I put an order in toVince. -- Michigan VHF Corp. The Foggy Mist Emporium |
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Re: Hello from Yellowknife
R Thompson
Thanks for those titles too Andy. Last night I put an order in to
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Lindsay Books. Arceurotrade is next on the things to do list. I visited the Busybeetools website and was looking over their Craftex CX04 lathe, which apparently is a re-branded Homier 7X12 lathe. They have it on sale at the moment for $699 (reg. $899) and I was wondering if I should impulse buy that while it is on sale and stash it away until I have room for it. My preference is to buy North American or European made products, so I've been looking at the Taig machines too. Well I won't be buying anything much if I don't get out the door and get to work. Ron On Tue, 2012-11-13 at 10:27 +0000, andyf1108 wrote:
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Re: Hello from Yellowknife
Hi Ron,
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As I think I mentioned in one of my emails, Arc Euro Trade stocks the whole Workshop Practice series, at about half the price of Amazon in the US. Arc Euro's shipping charges are reasonable, so I doubt if shipping across the Atlantic would tip the scales in favour of Amazon. Some of the books in the series are more useful than others; I got one on motors in the workshop, but I think it was written some time ago. Three other free sources of information: User's manual written in English rather than Chinglish: < > A guide to preparing the lathe once you get it: < > A book for Boxford (cloned South Bend) users, which contains a good deal of general advice on lathe operations, tools etc not specific to Boxfords: < > Andy --- In 7x12minilathe@..., R Thompson <ve8rt@...> wrote:
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John Bernoth
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