End Mills

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  • #48987
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    Ok all you mill users out there I have a question. Which end mill would be better or does it make any difference? One set is a 4 flute HSS single ended 1/8″ to 1/2″ or 6 HSS 1/8 – 1/2 TIN COATED 4 FLUTE SINGLE END MILLS SET. The plain HSS set is I think $38 and the other coated set is $33. Just curious if there is a dimes worth of difference. Thanks.

    #57171
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1559

    Hi Bernie,
    I think I would be suspicious of the TiN coated end mill if the price is actually lower than the straight HSS end mills. TiN end mills are great. The coating helps prevent metal chips from melting onto the steel. They can and should be run a little harder and faster than HSS. But…I think they are usually more expensive than non-TiN coated. If you’re looking at the same name brand and sizes and the TiN end mills cost less then I’m not sure what the deal is. Unless of course they are having a sale.
    As a quick side not though…HSS end mills are also excellent and will perform perfectly for normal horological work.
    Also, just a point of interest. The ‘TiN’ stands for titanium oxide. People often mistake that for tin.
    Enjoy,
    Bob

    #57172
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    That is kinda what I was thinking Bob. Everything I had seen especially name brand stuff were quite a bit higher in price. Of course both of these sets are on ebay and was looking for something a little cheaper so if I happen to ruin one trying to learn that it wouldn’t break the bank. 😆 I think both of these sets are made either in China or Korea. Like I said for learning to use the Taig lathe as a mill.

    #57173
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1559

    Hi Bernie,
    I have found that there are some decent import end mills and some not so good. Paying a little more usually pays off in the long run.
    Bob

    #57174
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    I have always lived by my grandfathers old saying. Ya get what ya pay for. 😆

    #57175
    david pierce
    Participant
    • Topics Started: 90
    • Total Posts: 1360

    Bernie,
    If you are going to mill in your Taig lathe I would not buy a set of endmills. A Bridgeport size machine can handle a 1/2 inch end mill with ease but a smaller less powerful machine will cut better with smaller endmill cutters. For a machine that small I would go with a 1/8 inch endmill. A larger cutter is going to transfer more foot pounds of torque through the machine. Small machine-small cutters.
    david

    #57176
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1559

    Good catch David!
    The part of your post about using a Taig didn’t register Bernie! I was under the impression that you purchased one of the HF mills that David and Tom have.

    Bob

    #57177
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    Thanks David and Bob. That is another thing that concerned me about buying a set. I was thinking of getting a 1/8″ and 3/16″. I didn’t think putting a 1/2″ end mill in my lathe would be a good idea after thinking about it. So do you think the 3/16″ would be to big also?

    Also wanted to ask should a guy get 2, 4, or 5 flute end mills?

    #57178
    david pierce
    Participant
    • Topics Started: 90
    • Total Posts: 1360

    Bernie,
    It should be OK but you will quickly know if the cutter is too large when you start milling. The machine will begin to bounce; I hate it when that happens.
    david

    #57179
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    Ok David I see what you mean. Would a guy want a 2, 4, or 5 flute mill?

    #57180
    david pierce
    Participant
    • Topics Started: 90
    • Total Posts: 1360

    Bernie,
    For a given feed rate, RPM and cutter diameter, a 2 flute takes more metal per bite than a 4 flute. The 2 flute is more efficient for softer metals and other materials such as aluminum and plastic. The 4 flute is better suited for harder metals such as steel where cutter breakage could be a problem. This does not mean that they will not work if not used this way as 2 flute cutters are used a lot to cut steel.

    #57181
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    Thank you David. I appreciate the help. I think maybe I will get both. I do cut aluminum and brass along with steel. Well have a lot to digest since I have a couple more days to sit. 😆

    #57182
    chris mabbott
    Participant
    • Topics Started: 119
    • Total Posts: 1525

    Bernie it seems that the same questions are hitting our minds at the same time, so thanks for asking as I also find the answers very useful.

    By the way, your recent setback may have caused a slight delay in production, but planning/purchasing are full speed ahead it seems 😆

    #57183
    bernie weishapl
    Participant
    • Topics Started: 58
    • Total Posts: 1218

    Yes they are Chris. Figured I might as well get things setup and ready to go when I can get back to the shop. I have several projects that I have lined up.

    #57184
    mahlon
    Participant
    • Topics Started: 28
    • Total Posts: 215

    Bernie, did you purchase the milling attachment for your taig. Mahlon

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bernie weishaplEnd Mills