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  • GreenAvenger commented on matt392's instructable Portable Hammer2 days ago
    Portable Hammer

    This might not be a complex idea, but it is nevertheless a very very useful one! The simple idea of covering a wooden face with a piece of metal is very cost effective and so it allows you to affordably create a whole collection of them with slightly different masses. Either variations in the mass of the wood or if the protective metal attachment. Why would you want different mass hammers you might ask? If so maybe it has been too long since you took a physics class? Basic physics gives us this formula... for elastic collisions m1*v1 + m2*v1 = m1v2 + m2*v2 I realize I may have written this formula a little weird or nonstandard and I am too lazy to explain all the variables at the moment but basically it says that if you want to impart maximum velocity from the sticking object (the ha...see more »This might not be a complex idea, but it is nevertheless a very very useful one! The simple idea of covering a wooden face with a piece of metal is very cost effective and so it allows you to affordably create a whole collection of them with slightly different masses. Either variations in the mass of the wood or if the protective metal attachment. Why would you want different mass hammers you might ask? If so maybe it has been too long since you took a physics class? Basic physics gives us this formula... for elastic collisions m1*v1 + m2*v1 = m1v2 + m2*v2 I realize I may have written this formula a little weird or nonstandard and I am too lazy to explain all the variables at the moment but basically it says that if you want to impart maximum velocity from the sticking object (the hammer) to the stricken object (the nail) then the mass and hardness of the objects should be as close to each other as possible. So if you want to drive a large nail use a large hammer and if you want to drive a small nail use a small hammer. This Instructable provides an easy way to make a virtually perfect hammer for any nail (be it s huge or tiny.) Thus, to me it is a brilliant idea! A simple idea that can be scaled simply and used widely for a great plethora of situations.... There is a type of genius that makes great ideas and another type that sees the full utility of other ideas however simple or complex! People Mk don't make the mistake of assuming that a "a very simple idea" is a bad or low merit one! The best ideas are "sneaky" in that their simplicity often hides their full value . They might even bore you with their common-ness but if you can think at those ideas used others places then they can truly become the seeds of your own creative genius!

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  • Quick Trick: Unstick Stuck Magnets

    Normally I am slightly annoyed by people going on and on with repetitive reminders of safety concerning various shop practices (I think a lot of it ought to be obvious) but in this case I think it is especially important to mention just how dangerous those super magnets you have are!!! I don't just mean to be cautious about super magnets in general (a good idea yes!) but I really mean that there are several things about the particular ones you show that make them especially dangerous!!!!! That is the fact that they are thin and no matter how big a super magnets is if it has one or two thin dimension(s) relative to the other one(s) that makes it especially prone to breaking, that is a bummer for sure but you also have really really wide magnets that are very thin in thickness and so I ...see more »Normally I am slightly annoyed by people going on and on with repetitive reminders of safety concerning various shop practices (I think a lot of it ought to be obvious) but in this case I think it is especially important to mention just how dangerous those super magnets you have are!!! I don't just mean to be cautious about super magnets in general (a good idea yes!) but I really mean that there are several things about the particular ones you show that make them especially dangerous!!!!! That is the fact that they are thin and no matter how big a super magnets is if it has one or two thin dimension(s) relative to the other one(s) that makes it especially prone to breaking, that is a bummer for sure but you also have really really wide magnets that are very thin in thickness and so I would be surprised if you have haven't already broken several and since they are so broad in surface area they still have a very very strong attractive force!!! Even with the plastic dividers! So when (not if) your magnets break they will create either tiny hyper velocity particles that are likely to blind you! So safety glasses are a must! Or the larger fragments will create razor sharp shards that could trap your hand in-between them and the stack (this even if wearing gloves) and even if wearing gloves they could both cut and crush their way right through them and your hand or fingers as they do so! If ever trapped with magnets like that do not attempt to separate them by force instead use a brass headed hammer to smash the broken fragments into slightly more manageable powder and then you can more safely extricate your poor mangled hand. So please keep a brass hammer available for that purpose!Smaller super magnets are cool for older kids and adults but ones such as you have are so dangerous I almost think that you should have to sign a liability disclaimer and be forced to watch an extensive safety procedures film in order to be able to purchase them and you certainly should not make an Instructable showing them without special mention about the high risk they represent!

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