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  1. #51
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    very nice work,can you tell us how you do the copper drive bands

  2. #52
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    They are a few thousandths undersize in ID, oversized OD, pressed on with a 25 ton press, then go back on the lathe to be machined to their proper profile.

  3. #53
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    Quote Originally Posted by peregrinvs View Post
    I note Milcorem now has 17PR / 77mm projectiles listed:

    https://www.milcorem.fr/obus-de-76-à-89mm/

    But not actually for sale, so possibly a work in progress. (Not sure about the shape of the AP-T) I would be tempted by a APCBC-T if it was accurate as I don’t suppose I shall ever get a real one and I have an empty 77mm case to fill.
    There's a real 77mm APC on classifieds if that's any use.
    Dave.
    http://www.bocn.co.uk/classifieds/sh...ww2inert&cat=5

  4. #54
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    My local tank museum - Museum of the American GI - requested that I produce enough 37mm projectiles (between 50-100) to fill the ammo racks of an American M3 Lee tank. They have enough cases. So, it looks like I am in the reproduction projectile business now. I have the M74 AP mold, and I am working on the M63 HE. I will also do an M51 AP.
    Attached Images Attached Images
    Last edited by M8owner; 15th April 2020 at 12:51 AM.

  5. #55
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    Here is the M63 HE.
    Attached Images Attached Images

  6. #56
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    Those look great Steve! Looks like now you've mastered resin in addition to metal.
    I know you have some unobtainium in your collection (French/Polish 75 AP, Jap 75AP...).
    Have you given any thought to cost/benefit on doing resin of some of those?

  7. #57
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    Thank you, Jeff. The silicone mold resin is the expensive part of this. Each 37mm projectile mold has about $50 of resin that goes into making it. It works well for 37mm, but it might be to "squishy" for a 75mm - will deform under weight of polyurethane casting resin for the projectile. The larger molds will cost at least $100 or more for the silicone mold resin. I am not sure I could sell more than a few of the more exotic projectiles - might not be worth it.

  8. #58
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    Here they are all painted and stamped. I have made 90 total so far. Stamping these is much more difficult than the originals due to their light weight of only 5 ounces. It was so much trouble, I had to turn my lathe into a stamping machine. The projectile free spins on a ball bearing roller from a mail sorting machine that I have been keeping for 20 years - just looking for the right application.
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  9. The Following 3 Users Say Thank You to M8owner For This Useful Post:

    doppz92 (28th May 2020), peregrinvs (6th July 2020), Slick (28th May 2020)

  10. #59
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    Firstly, a huge THANK YOU to Steve for a package I received today. Added some fine resin replicas to the stash. The amazing thing is the details cast into the driving bands. Here are examples of the original castings.
    resin 2.jpg resin 1.jpg

    Also, a grande gracias for the flare. Will have to do some research on that one.

    Rick
    Better to remain silent and be thought a fool than to speak out and remove all doubt.

  11. #60
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    I successfully cast some US M72 75mm AP projectiles this weekend. The mold has $200 worth of silicone resin in it - ten pounds of material. Each projectile has almost 3 pounds or $20 worth of resin in it. It is also extremely difficult to remove these from a one piece mold.
    Attached Images Attached Images

 

 
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