Re: Lathe and milling attachment - which cutters to get started?
When I use a plain shank mill I use a marker to color the visible portion of the shank. If a shiny ring appears then STOP! I also use a piece of colored paper between the work and the table. If colored shreds appear then STOP!? ???Bill in Boulder ? Sent from for Windows 10 ?
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From: Mark KimballSent: Wednesday, April 6, 2022 10:56 To: [email protected]Subject: Re: [7x12MiniLathe] Lathe and milling attachment - which cutters to get started? ? When using the type of end mill holder that uses a grub screw to hold the EM in place, it's important to make sure the slot in the EM is pulled up against the screw.? Otherwise, as I learned the hard way, the end mill still can be pulled down and ruin your work.? You want the screw to act as a stop as well as a holding device.
This said, I have to wonder about smaller end mills that don't have a slot ground in their shank.? I think a collet-type holder probably would hold them more firmly.? I definitely would use a collet for smaller carbide end mills -- the point force of the grub screw could break the cutter.?
At work we had a machine for cutting small pockets in things like integrated circuit packages and it could spin the cutters up to 150,000RPM's.? As you can imagine it used a very well balanced collet.
Mark
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Re: Lathe and milling attachment - which cutters to get started?
When using the type of end mill holder that uses a grub screw to hold the EM in place, it's important to make sure the slot in the EM is pulled up against the screw.? Otherwise, as I learned the hard way, the end mill still can be pulled down and ruin your work.? You want the screw to act as a stop as well as a holding device.
This said, I have to wonder about smaller end mills that don't have a slot ground in their shank.? I think a collet-type holder probably would hold them more firmly.? I definitely would use a collet for smaller carbide end mills -- the point force of the grub screw could break the cutter.?
At work we had a machine for cutting small pockets in things like integrated circuit packages and it could spin the cutters up to 150,000RPM's.? As you can imagine it used a very well balanced collet.
Mark
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Re: Turning Brass and Aluminum on a 7x14
On Mon, Apr 4, 2022 at 03:27 PM, kaje7777 wrote:
I had the same experience of having brass gibs warping after machining, so I did some research on the topic. You can find the discussion and references here :
https://sites.google.com/site/lagadoacademy/machining---lathes-mills-etc/brass---stress-relieving
That's the information I used in my attempt to stress-relieve my brass :).
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Re: Turning Brass and Aluminum on a 7x14
I save my beer cans for just this purpose....
Mike Taglieri?
So long as the material between jaw and material is the same on all three it is just convenience. I suspect most use drink can aluminium or tinplate.
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Re: Height of compound above ways?
Well now that you make think about it, you are correct. He has a MicroLux and his new Vevor. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ?
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From: [email protected] < [email protected]> On Behalf Of mike allen Sent: Tuesday, April 5, 2022 11:55 AM To: [email protected]Subject: Re: [7x12MiniLathe] Height of compound above ways? ? ??? ??? Doesn't he have 2 lathes ? ??? ??? animal On 4/5/2022 11:37 AM, Michael Jablonski wrote: If he has the compound mounted on a faceplate to machine it, he¡¯d no longer have a compound to hold a cutter. Unless he has another lathe near by. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ? ? ??? ??? Face it on a faceplate ??? ??? animal On 4/5/2022 9:14 AM, j_r_abercrombie via groups.io wrote: On Tue, Apr 5, 2022 at 06:17 AM, mario mohl wrote: If he doesn't trust himself to machine a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw - absolutely not!
Anyway- as I have said- the whole point of my post about the height of the compound was not to ask for solutions to a problem, but as a FYI for others to prevent them from buying the wrong size tools, presuming that all 7x lathes are built to the same dimensions. But, perhaps I'm the only beginner who didn't know that! :).
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Re: Lathe and milling attachment - which cutters to get started?
I have the R8 version (3/8 shank) on my mill. It makes changing endmills very easy with a single allen screw, without having to loosen the drawbar. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ?
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From: [email protected] < [email protected]> On Behalf Of Bruce J Sent: Tuesday, April 5, 2022 11:47 AM To: [email protected]Subject: Re: [7x12MiniLathe] Lathe and milling attachment - which cutters to get started? ? I got a 3/8¡± MT3 adapter (at the time from Victor Machinery because they were pretty cheap.) similar to this:?? This was based on watching a video from Mr Pete on youtube that discussed using a milling adapter on a lather; it is the most resistant to the cutter being pulled out of the holder, be it an adapter like this, a collet chuck or just the regular chuck. I also made a simple, but effective carriage lock that improved the process quite a bit. I posted it here but cannot find it right now; does anyone know how to search messages by a key word AND who posted the message?
On Apr 5, 2022, at 11:29 AM, Michael Jablonski <michaeljab@...> wrote: ? I started the same way did, with the lathe milling attachment. I went with a 3/8¡± collet and set of HSS Center cutting 4 Flute 3/8¡± shank endmills from LMS. This way I only needed one 3/8¡± collet. I quickly learned that I had made a mistake trying to mill on the lathe and purchased a 3990 Hi-Torque mill from LMS. Only attempt conventional milling on the lathe, no climb cutting. Good Luck. Michael - California, USA LMS 3990 Hi-Torque Mill with power feed 7x14 lathe with 500 watt motor, no Hi-Lo gearbox.
I have a milling attachment and collet faceplate and collets.
What cutters should I get to start?
I don't have any specific projects in mind, yet.
Thanks.?
? "Wherever you go, there you are." B. Banzai, PhD ?
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Re: Height of compound above ways?
In his book Ted Hansen does this by clamping the tool to an angle plate bolted to the cross-slide (he recommends taking 1/16th off the compound because it gives you room to use 3/8¡± inch tools in the standard 4-way tool holder). So it is possible if all you have is one lathe. ? On Apr 5, 2022, at 11:55 AM, mike allen < animal@...> wrote:
??? ??? Doesn't he have 2 lathes ? ??? ??? animal
On 4/5/2022 11:37 AM, Michael Jablonski wrote:
If he has the compound mounted on a faceplate to machine it, he¡¯d no longer have a compound to hold a cutter. Unless he has another lathe near by. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ? ? ??? ??? Face it on a faceplate? ??? ??? animal On 4/5/2022 9:14 AM, j_r_abercrombie via??wrote: On Tue, Apr 5, 2022 at 06:17 AM, mario mohl wrote: If he doesn't trust himself to machine a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw - absolutely not!
Anyway- as I have said- the whole point of my post about the height of the compound was not to ask for solutions to a problem, but as a FYI for others to prevent them from buying the wrong size tools, presuming that all 7x lathes are built to the same dimensions. But, perhaps I'm the only beginner who didn't know that! :).?
--? Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
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Re: Height of compound above ways?
??? ??? Doesn't he have 2 lathes ?
??? ??? animal
On 4/5/2022 11:37 AM, Michael Jablonski
wrote:
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If he has the compound mounted on a
faceplate to machine it, he¡¯d no longer have a compound to
hold a cutter. Unless he has another lathe near by.
?
Michael - California, USA
Micro-Mark MicroLux 7x16
LMS 3990 Hi-Torque Mill with power feed
?
?
?
?
??? ??? Face it on a faceplate
??? ??? animal
On 4/5/2022 9:14 AM, j_r_abercrombie via
groups.io wrote:
On Tue, Apr 5, 2022 at 06:17 AM, mario
mohl wrote:
If he doesn't trust himself to machine
a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw -
absolutely not!
Anyway- as I have said- the whole point of my post about the
height of the compound was not to ask for solutions to a
problem, but as a FYI for others to prevent them from buying
the wrong size tools, presuming that all 7x lathes are built
to the same dimensions. But, perhaps I'm the only beginner
who didn't know that! :).
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Re: Lathe and milling attachment - which cutters to get started?
I got a 3/8¡± MT3 adapter (at the time from Victor Machinery because they were pretty cheap.) similar to this:??
This was based on watching a video from Mr Pete on youtube that discussed using a milling adapter on a lather; it is the most resistant to the cutter being pulled out of the holder, be it an adapter like this, a collet chuck or just the regular chuck.
I also made a simple, but effective carriage lock that improved the process quite a bit. I posted it here but cannot find it right now; does anyone know how to search messages by a key word AND who posted the message? On Apr 5, 2022, at 11:29 AM, Michael Jablonski < michaeljab@...> wrote:
I started the same way did, with the lathe milling attachment. I went with a 3/8¡± collet and set of HSS Center cutting 4 Flute 3/8¡± shank endmills from LMS. <??> ? This way I only needed one 3/8¡± collet. ? I quickly learned that I had made a mistake trying to mill on the lathe and purchased a 3990 Hi-Torque mill from LMS. ? Only attempt conventional milling on the lathe, no climb cutting. Good Luck. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ? ? 7x14 lathe with 500 watt motor, no Hi-Lo gearbox.
I have a milling attachment and collet faceplate and collets.
What cutters should I get to start?
I don't have any specific projects in mind, yet.
Thanks.?
--? Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
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Re: Height of compound above ways?
If he has the compound mounted on a faceplate to machine it, he¡¯d no longer have a compound to hold a cutter. Unless he has another lathe near by. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ?
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From: [email protected] < [email protected]> On Behalf Of mike allen Sent: Tuesday, April 5, 2022 10:37 AM To: [email protected]Subject: Re: [7x12MiniLathe] Height of compound above ways? ? ??? ??? Face it on a faceplate ??? ??? animal On 4/5/2022 9:14 AM, j_r_abercrombie via groups.io wrote: On Tue, Apr 5, 2022 at 06:17 AM, mario mohl wrote: If he doesn't trust himself to machine a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw - absolutely not!
Anyway- as I have said- the whole point of my post about the height of the compound was not to ask for solutions to a problem, but as a FYI for others to prevent them from buying the wrong size tools, presuming that all 7x lathes are built to the same dimensions. But, perhaps I'm the only beginner who didn't know that! :).
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Re: Lathe and milling attachment - which cutters to get started?
I started the same way did, with the lathe milling attachment. I went with a 3/8¡± collet and set of HSS Center cutting 4 Flute 3/8¡± shank endmills from LMS. < > ? This way I only needed one 3/8¡± collet. ? I quickly learned that I had made a mistake trying to mill on the lathe and purchased a 3990 Hi-Torque mill from LMS. ? Only attempt conventional milling on the lathe, no climb cutting. Good Luck. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of j_r_abercrombie via groups.io Sent: Monday, April 4, 2022 9:27 PM To: [email protected]Subject: [7x12MiniLathe] Lathe and milling attachment - which cutters to get started? ? 7x14 lathe with 500 watt motor, no Hi-Lo gearbox.
I have a milling attachment and collet faceplate and collets.
What cutters should I get to start?
I don't have any specific projects in mind, yet.
Thanks.
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Re: Height of compound above ways?
??? ??? Face it on a faceplate
??? ??? animal
On 4/5/2022 9:14 AM, j_r_abercrombie
via groups.io wrote:
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Show quoted text
On Tue, Apr 5, 2022 at 06:17 AM, mario mohl wrote:
If he doesn't trust himself to machine a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw - absolutely not!
Anyway- as I have said- the whole point of my post about the
height of the compound was not to ask for solutions to a problem,
but as a FYI for others to prevent them from buying the wrong size
tools, presuming that all 7x lathes are built to the same
dimensions. But, perhaps I'm the only beginner who didn't know
that! :).
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Re: Height of compound above ways?
Agreeing with John regarding using a QCTP
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Re: Height of compound above ways?
I agree - and have a different set of tool holders for each lathe, set to the right height.
ralphie
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Re: Height of compound above ways?
On Tue, Apr 5, 2022 at 06:17 AM, mario mohl wrote:
If he doesn't trust himself to machine a 3.5 mm shim
Facing a 3.5mm shim in the 4-jaw - absolutely not! Anyway- as I have said- the whole point of my post about the height of the compound was not to ask for solutions to a problem, but as a FYI for others to prevent them from buying the wrong size tools, presuming that all 7x lathes are built to the same dimensions. But, perhaps I'm the only beginner who didn't know that! :).
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Re: Height of compound above ways?
On Tue, Apr 5, 2022 at 06:35 AM, mario mohl wrote:
The choice of a minilathe?for that purpose boggles the mind, but to each his own
Absolutely. But the lathe cost $400 USD delivered and I already had the milling attachment. The very cheapest 'benchtop' milling machine would be 4 times that price without a milling vise collets, etc. 'Ready to work, a little milling machine would be 6 times the price of the Vevor/RealBull lathe. Completely different. As i said in another discussion the lathe was an impulse purchase, and using it for milling seems like a possibility.
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Re: Height of compound above ways?
How about a "quick-change" tool post?
--
Jon Titus
Herriman, UT
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Re: Lathe and milling attachment - which cutters to get started?
What materials are you machining?
I make most use of a 6mm diameter, 3 flute and 10mm diameter 4 flute end mills when milling using the vertical slide in my 7x14 lathe - mostly on aluminium, but also some steel. The 3 flute works particularly nicely on aluminium. (I think it's carbide, but both carbide & HSS work OK.) I also have a set of cheap Chinese HSS slot drills that have worked OK when I've needed them.
Choose cutter/shank diameters to suit the collets you already have.
I have a small flycutter (about 40mm diameter?) but the lack of X travel means I've never used it.
(You *need* to be able to lock the carriage, IMHO).
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Re: Height of compound above ways?
Furthermore, the man has an even better way out, he doesn't intend to use the lathe as such but mostly?as a milling machine. The choice of a minilathe?for that purpose boggles the mind, but to each his own
If he doesn't trust himself to machine a 3.5 mm shim, I would doubt he'd take a go at the compound slide, anf likely for good reason. A failed attempt at a shim can be thrown out with a shrug, a mangled compound would?be more painful. In a pinch I would suggest rather settle for a piece of 1/8" stock (3.2 mm) and call it good enough.
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Re: Height of compound above ways?
If he doesn't trust himself to machine a 3.5 mm shim, I would doubt he'd take a go at the compound slide, anf likely for good reason. A failed attempt at a shim can be thrown out with a shrug, a mangled compound would?be more painful. In a pinch I would suggest rather settle for a piece of 1/8" stock (3.2 mm) and call it good enough.
If they're that different, it might be worth it to change them so they're not.? Put the taller compound on the faceplate and turn it down until they match.
Mike Taglieri?
On Sun, Apr 3, 2022, 8:22 PM j_r_abercrombie via <j_r_abercrombie= [email protected]> wrote: Compound slide height above ways: I thought I would be able to swap tools in their QCTP holders between my Microlux 7x14 and my Vevor 7x14. Surprise!  The height to the top of the compound slide is different on the two lathes; though the spindle center height above the ways is the same. On the Vevor the top of the compound is about 3.5 mm lower than on the MicroLux. (71mm vs 74.5mm) The reduction is in the compound slide top and base. So we're not dealing with exact 'clones' even though it looks like the basic castings are very similar on different machines. Do other brands/ variants have different heights? I haven't checked yet, but I think this means that the parting tool holders with the sloping 'ramp' might be usable on the Vevor, while the one that came in the 'set' with the tool post isn't usable on my Microlux. I had to order a 'straight' holder from LittleMachineShop.
The difference might also affect the size of tools that will still be able to be set at center height.
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Ralph Lehotsky