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  1. #16
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by phaser View Post
    I will be pouring in a breeze and staying up wind.
    There are many treatments for osteoporosis but the main ones are getting enough calcium and vit D, plus doing exercises with weights.
    I have been in a related camp for the last few months. I don't have osteoporosis but a recent blood tests showed I had low levels of vit D so the doc put me on vit D tablets. Meanwhile a condition I have started to take Ca out of my bones and my blood Ca levels took off to the point where it could affect my heart. So stop the Vit D tabs and am now on a low dose of cortisone to calm things down and I have blood tests every 4 weeks. I doubt whether weights will do anything for my bones as I am already about 30kg over weight.

    Be careful doing exercises with weights. A mate of mine was training back in the 70's wearing a basic back pack with 3 bricks in it and eventually did his back in. Start light and work up to the heavier ones was what he was advised.

  2. #17
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    Quote Originally Posted by BobL View Post
    I have been in a related camp for the last few months. I don't have osteoporosis but a recent blood tests showed I had low levels of vit D so the doc put me on vit D tablets. Meanwhile a condition I have started to take Ca out of my bones and my blood Ca levels took off to the point where it could affect my heart. So stop the Vit D tabs and am now on a low dose of cortisone to calm things down and I have blood tests every 4 weeks. I doubt whether weights will do anything for my bones as I am already about 30kg over weight.

    Be careful doing exercises with weights. A mate of mine was training back in the 70's wearing a basic back pack with 3 bricks in it and eventually did his back in. Start light and work up to the heavier ones was what he was advised.
    I am way underweight which is mostly muscle mass loss for me so carrying weights should help I believe. The recommended thing for the bones is lifting weights and using exercise machines. It's the movement under tension and little shocks to your joints etc that help, so check with your doctor but I would say lifting weights would be good for you too. I just want to add carrying weights for extended times to my routine, it's just my idea but I'm sure it will work for me.
    I will be starting out small, like say 1Kg and just add another Kg when I feel it's ok to do so. I would expect to build up to around 4-5Kg. If I make 250g weights I can build up a little at a time and add them around my body in a balanced fashion.
    Sand sounds ok but then again lead still means a smaller package, and since I intend to wear it so much I want it to be comfortable.
    I thought of making a vest out of leather (I have plenty of it) with many pockets so I can spread the weight around my body. A back pack is definitely a bad idea since it will put all of the weight behind the spine and could cause an injury. What I'm attempting to do is imitate an increase in body fat.

  3. #18
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    I'm having trouble with the mould.
    I made a former from a piece of melamine and screwed 4 pieces of wood to it to make a boundary.
    Apparently half and half plaster of paris and cement are a good mix so that's what I did. The mould broke when I tried to remove the positive (3D printed copy of the weight with a 10Deg. taper).
    The mix sets so quickly I had trouble getting it into the former and placing the positive piece. It even starts setting while I'm stirring it. Should I have made the mix more runny ?

  4. #19
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    Quote Originally Posted by simonl View Post
    How much weight did you want to carry? Another option is to just buy a weighted vest that takes small pockets of sand. Very popular in Cross fit etc. These can carry up to about 50Kg. No one uses lead these days for weighted vests for the reasons you mention above.

    And, for under $100 why would you bother re-inventing the wheel? Unless of course you want to carry more weight and keep the bulk down.

    https://www.ebay.com.au/itm/20KG-50k...item25d984be50

    Simon
    These vests look pretty good for the price.

  5. #20
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    Oh and another question relating to the lead.
    So after pouring, the lead with shrink a little, right ?
    Lets assume I'm making a lead doughnut. So will the hole in the middle get smaller or larger with shrinkage ?

  6. #21
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    Quote Originally Posted by phaser View Post
    The mix sets so quickly I had trouble getting it into the former and placing the positive piece. It even starts setting while I'm stirring it. Should I have made the mix more runny ?
    I was never very good at making mud pies but I think you might be mixing/stirring to much and for to long.
    I had 2 Irish m8s that were plasterers and they used to piddle in the cornice cement to slow it down

    cheers, shed

  7. #22
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by phaser View Post
    Oh and another question relating to the lead.
    So after pouring, the lead with shrink a little, right ?
    Lets assume I'm making a lead doughnut. So will the hole in the middle get smaller or larger with shrinkage ?
    The way you work this out is, to think of the ring as a long rod, a rod will shrink in length on cooling so hole gets smaller.
    Same the other way, heat a barrel hoop and the hole gets larger

  8. #23
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    Quote Originally Posted by BobL View Post
    The way you work this out is, to think of the ring as a long rod, a rod will shrink in length on cooling so hole gets smaller.
    Same the other way, heat a barrel hoop and the hole gets larger
    Well that means moulding with slots wont work too good because it will prob break the mould.
    Going back to that doughnut, years ago I tried to drill a 3/8" hole in a 1/2" plate of copper, half way through it suddenly grabbed the drill and it snapped. Right after drilling the broken tip was held fast but when it cooled I pulled it out with my fingers, so I figured the hole got smaller as it heated up.

  9. #24
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    No different to when you want to press the inner race of a tapered roller bearing onto a shaft. A press fit soon becomes a sliding fit with a small amount of heat.

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  10. #25
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by phaser View Post
    Well that means moulding with slots wont work too good because it will prob break the mould.
    Going back to that doughnut, years ago I tried to drill a 3/8" hole in a 1/2" plate of copper, half way through it suddenly grabbed the drill and it snapped. Right after drilling the broken tip was held fast but when it cooled I pulled it out with my fingers, so I figured the hole got smaller as it heated up.
    That was because of uneven heating - the outside edge of the plate was not as hot as the area around the hole so the metal had nowhere to go but inwards. However that expansion was not the cause of the "bit grab" Copper is notorious for galling onto bits. It softens from the heat of drilling and sticks like Klingon excrement to the bit and itself. Even after a few mm of drilling it can completely seize a bit .

  11. #26
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    Quote Originally Posted by BobL View Post
    That was because of uneven heating - the outside edge of the plate was not as hot as the area around the hole so the metal had nowhere to go but inwards. However that expansion was not the cause of the "bit grab" Copper is notorious for galling onto bits. It softens from the heat of drilling and sticks like Klingon excrement to the bit and itself. Even after a few mm of drilling it can completely seize a bit .
    Yep and that's what it did.

  12. #27
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    Oh for heaven sake !, and I've just finished moulding my weights. Ha ha ha

    https://www.aldi.com.au/en/special-b...18-06-08_15-31

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