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Lathe and milling attachment - which cutters to get started?
开云体育Get half a dozen 3/8" square HSS blanks and learn to grind LH & RH tools. Later on you can buy a set of indexable tools - same size shanks. Avoid toolsets with brazed on carbide tool tips - they are only good for cast iron. Martin -- Sent with Tutanota, the secure & ad-free mailbox. 5 Apr 2022, 06:26 by j_r_abercrombie@...:
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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). |
开云体育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 ? ? ? 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. |
开云体育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?
--? Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD |
开云体育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 ? ? ? 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?
? --? Bruce Johnson ? "Wherever you go, there you are." B. Banzai, PhD ? |
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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 |
开云体育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 ? From: Mark Kimball
Sent: 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. ? |
开云体育At those rotational speeds, everything must be well balanced. ? The turbine, bearings, and burs for high-speed air-drive dental handpieces are designed to spin at up to ~ 400,000 RPM and deliver an amazing amount of power to those tiny (shank diameter 1.6 mm) carbide or diamond coated burs.? ? ? Jerry F. ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Mark Kimball
Sent: Wednesday, April 06, 2022 9:56 AM 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. |
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Chris Albertson
I have one of those milling attachments.? ? I don't use it anymore because I now have a mill.? ? But with the attachment, you will only?be doing the smallest of jobs.? Perhaps cutting a keyway slot on a shaft or making the end of a shaft into a "D" shape.? What you need is a collection of small end mills, from 2 mm up to about 8 mm in diameter.???These break so buy spares. What you can never have is enough of is clamping tools.? ?But you can make these as needed,? On Tue, Apr 5, 2022 at 1:37 AM j_r_abercrombie via <j_r_abercrombie=[email protected]> wrote: On Mon, Apr 4, 2022 at 10:59 PM, <mfslater@...> wrote: --
Chris Albertson Redondo Beach, California |
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On Wed, Apr 6, 2022 at 11:57 AM, Chris Albertson wrote:
Thanks, Chris. I've heard that the carbide tools don't like any sort of shock loading, so I'm buying a bunch of tools from different Chinese sellers. |
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I use a Unimat DB200 vertical milling spindle on my 7x16 Mocro Mark minilathe. This works good for me. I can use end mills from 1/32” to 3/8” and larger at times.
I can also use The Unimat headstock in horizontal mode at any angle which is a more solid setup allowing larger cutters to be used. So cutter size selection is contingent upon how solid the setup is. |
开云体育Bruce,
Your posting titled? -->"1 Half nut vs 2 half nut", <--?
references a carriage lock...
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Is this what you are asking for?
On 4/5/2022 2:46 PM, Bruce J wrote:
I got a 3/8” MT3 adapter (at the time from Victor Machinery because they were pretty cheap.) similar to this:??
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OldToolmaker