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Thread: Slotter or broach driver.

  1. #1
    Supporting Member tonyfoale's Avatar
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    Slotter or broach driver.

    I built a pneumatic slotter to make pulleys for my recently posted lathe project
    Ball screw and electronic lathe conversion

    and also to make some motorcycle clutch baskets. It is a dynamic device best viewed in moving picture form;

    Download plans for milling tools.

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    WmRMeyers's Avatar
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    Nicely done, Tony. I think I would have gone looking for a shaper, but what you've done should work very well for what you need.

    Bill
    Download plans for milling tools.

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    Supporting Member tonyfoale's Avatar
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    Quote Originally Posted by WmRMeyers View Post
    Nicely done, Tony. I think I would have gone looking for a shaper, but what you've done should work very well for what you need.

    Bill
    Bill,

    Firstly, space is short and a shaper could not earn its space for something with limited use for me. Fitting it on the mill makes it easy to index round stuff with a 4th axis and a few lines of G code could make it automatic from start to finish.

    Secondly, there is no Craig's list here, the nearest shaper shop is probably 200 km from here and prices are crazy if I could find one.

    Thirdly I wanted it working the next day.

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    My introduction to machining, back my senior year of high school, was lathe and shaper. I didn't get to play with the milling machines, but also know that shapers can do most things the mills can do, and a couple of things they can't. With really cheap tooling, unlike a mill. I have loved them ever since. To the point where I have 3 lathes, 2 milling machines, and a shaper, among many other things, and would buy a larger one if I could find one I could afford and shoehorn into my shop. Yep. YMMV!

    And not to say your reasons aren't perfectly valid, either! Good and sufficient. Though I can really see wanting it TOMMOROW! I've actually had my shaper for several years, having bought it as a restoration project, and it's been put on the back burner so many times I lost count a few years ago. A few weeks ago, I made a new countershaft for it, but discovered I'd lost the bearing housing for the countershaft, and I've been looking for it as I juggled stuff in the workshop room. Found it last night! Now I have to punch out the bearing and get replacements. Hopefully Monday. But that may go by the wayside again, too. Frankly, I've got too much stuff in too little space, and some of it needs to go elsewhere. I've got a 10x14 metal shed in the back yard that also needs repairs, and some of the stuff can go out there once it's fixed. I figure to put the "dirty" stuff out there. Grinders, saws, etc. I have stuff juggled around enough now that I can see that I might be able to fit everything "clean" in the space I have inside the house now. Maybe.

    Bill

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    Supporting Member tonyfoale's Avatar
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    Quote Originally Posted by WmRMeyers View Post
    ............ but also know that shapers can do most things the mills can do, and a couple of things they can't.
    You may be a devotee of shapers but that is somewhat of an exageration. How would a shaper help me do this, which is typical my milling needs?

    Slotter or broach driver.-o_ringpushrodtunnel04.jpg or this Slotter or broach driver.-crankcases056.jpg

    Quote Originally Posted by WmRMeyers View Post
    I've actually had my shaper for several years, having bought it as a restoration project, and it's been put on the back burner so many times I lost count a few years ago.
    Bill
    That is another reason that I have no desire for a shaper. I have nothing against shapers but they just offer nothing to be of interest to me.

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    WmRMeyers's Avatar
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    Quote Originally Posted by tonyfoale View Post
    You may be a devotee of shapers but that is somewhat of an exageration. How would a shaper help me do this, which is typical my milling needs?

    Click image for larger version. 

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    That is another reason that I have no desire for a shaper. I have nothing against shapers but they just offer nothing to be of interest to me.
    It wouldn't, and I didn't say it would do everything a mill would, just most things. Even in mills, there are two basic types, both of which have advantages and disadvantages. Horizontal mills will do some things vertical mills can't do, and the reverse is true, also. That would be one reason why I have one of each. Horizontal mills require pretty specialized & expensive tooling to do some of the things that vertical mills can't do. Vertical mill tooling is also more expensive than shaper tooling. But mills are generally much faster than shapers.

    Shaper tooling can be dead cheap, but shapers are really slow. You use the tool that best suits what you need. You needed a shaper, and made one. Slotter/Shaper. Major difference is that one is horizontal, one vertical. Yours is a slotter. They are of limited use. But downright useful, too. And there isn't anything wrong with not being interested in shapers or slotters. As long as you don't need one.

    There are some folks who own manual shapers. Their arm powers the shaper. That's a bit much even for me, but it's just right for some folks. If you didn't have the air cylinder would you have possibly powered your device manually? It would have worked, just been much slower, and not nearly as much fun. Though some folks find it fun and relaxing.

    You had other things to do, and that is just fine, and perfectly sensible. I'm playing with the stuff I play with because it is play. I'm doing it for fun. I'm sure you enjoy doing what you're doing, but it's obviously not just for fun for you. Nothing wrong with that, either. And if shapers are in short supply in your area, that's a perfectly fine reason all by itself. From the video, I'd say you're a grownup. You don't need my permission for anything, and I enjoyed your video because it showed a way to get around a problem that I might never have run into. Though I bet you could take that thing off your mill, and bolt it to a bench with a vise and make it work, too. And IIRC, you didn't make any permanent modifications to the lathe parts you used for the slide, so you could put it on a lathe when you need to. Excellent ingenuity. I'm almost jealous.

    Bill

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    Supporting Member tonyfoale's Avatar
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    Quote Originally Posted by WmRMeyers View Post
    You had other things to do, and that is just fine, and perfectly sensible. I'm playing with the stuff I play with because it is play. I'm doing it for fun. I'm sure you enjoy doing what you're doing, but it's obviously not just for fun for you.
    I thought it was fun. Well, using the tools is more fun than making them, and racing what the tools make is the most fun of all.

    Quote Originally Posted by WmRMeyers View Post
    From the video, I'd say you're a grownup.
    I hope not.

    Quote Originally Posted by WmRMeyers View Post
    you didn't make any permanent modifications to the lathe parts you used for the slide, so you could put it on a lathe when you need to. Excellent ingenuity. I'm almost jealous.
    Bill
    It could go back but it is much better to use a solid block in its place.

  9. #8
    WmRMeyers's Avatar
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    Growing up doesn't mean losing your sense of fun. Like they say, the difference between men and boys is the price of their toys.

    I never got to do racing. My Uncle Walt was a name in go-kart racing in the 70's and 80's, at least, and I built karts for him for a short time while I was waiting to go into the USAF, but never got invited to even go to a race, not to mention drive one of the karts. His son was a racer, and won some races, and some trophies. 90HP Mac chainsaw motors, x2 on the karts they were racing. Some of the folks I was working with had been seriously injured doing it, and I suspect that might have had something to do with the lack of invitations.

    As for the lathe parts, sometimes you need a compound, sometimes not. It all depends on what you're doing. Solving a problem can be fun. Using the solution can be fun. And sometimes it's just a means to an end. I like doing maintenance on machines. I think it's fun. It's less fun, however, when you need the thing running the next day to get to work, and it's sleeting while you're working. Been there, done that! May you always have the tools you need to hand, and may all your maintenance be fun, and done in good weather!

    Bill

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    Thanks tonyfoale! We've added your Slotter to our Machining category,
    as well as to your builder page: tonyfoale's Homemade Tools. Your receipt:




  11. #10
    Supporting Member tonyfoale's Avatar
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    Quote Originally Posted by WmRMeyers View Post
    As for the lathe parts, sometimes you need a compound, sometimes not. It all depends on what you're doing.
    Bill
    A compound is necessary for doing short large angle tapers, and for feeding the tool in at an appropriate angle for screw cutting. Apart from that the compound is a source of extra flex and slop.
    For years I have run with a solid alternative only installing the compound when I needed to do the above. Now with my electronic control I do not need it to do those tasks so I shall have no future need to fit it to the lathe.

    Slotter or broach driver.-toolpost-mount-01.jpg Click for full size.

    Here is my tool post block, very rigid and there is a reduced chance of chatter.

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