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  • Cenedd
    replied
    Originally posted by Boats69 View Post
    Homemade cut knurling tool - I still need to make few different pitch knurl wheels - those are 1mm or about 25 tpi. I am quite happy with results, although I can still refine the setting to height.
    Very nice Boats. Care to comment on the merits of cut knurling vs deformation knurling for the uninformed? Assume it requires less tool pressure but then there must be a reason this isn't the default. Presumably, given the angles, it must travel to cut a knurl that wide?

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  • DennisCA
    replied
    The overhang didn't look that bad to me.

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  • J Tiers
    replied
    Originally posted by thaiguzzi View Post

    +1, very nice.
    However, what gets me with virtually all ER chucks i've seen mounted straight onto the spindle, is the apparent excessive overhang.
    Or is it just me?
    It ain't just you. I see it with most of the collet chucks for whatever type.

    I suppose that if you want a 5C on an MT3 spindle, you are stuck, it's built-in by the sizes. But that overhang looks like it could easily defeat all the repeatability and accuracy of having a collet. YMMV, I guess.

    Browne and sharp made stubby collets for turret lathes. Sort of like the front part of a 5C. THAT could be made pretty short as a collet chuck, and would not hold any worse than a regular 5C, probably better. I think they had rubber between the sections like a Jacobs collet, but I have never seen one in person. I'd bet you cannot get those anymore, or if you can, you won;t like the price.

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  • Boats69
    replied
    Homemade cut knurling tool - I still need to make few different pitch knurl wheels - those are 1mm or about 25 tpi. I am quite happy with results, although I can still refine the setting to height.

    Click image for larger version

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  • BCRider
    replied
    I'm sorry that I mislead all you lawn mower enthusiasts....


    Originally posted by thaiguzzi View Post

    +1, very nice.
    However, what gets me with virtually all ER chucks i've seen mounted straight onto the spindle, is the apparent excessive overhang.
    Or is it just me?
    We'd need to look at the length of the parts and how they can or can't fit into each other. But consider that the nose on these lathes (that's a 9" South Bend I believe?) is at least 1.25" long and probably more like 1.4'ish. Add to that the 46mm or 1.8" long collet itself. So pretty well unavoidable that it would be 3.25" long at least. And on a fairly compact lathe it'll look like it sticks out a lot.

    A couple of years ago I posted details of my own 5C collet chuck. I did make mine a bit longer out of need due to the design of my lathe bed. In my case the length of the collet chuck was unavoidable to avoid the carriage riding off the end of the bed rails. But in Mower's case I suspect it's just about as short as it can be given the stack lengths of the parts.

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  • rcaffin
    replied
    I suspect that paint thinner might in fact be effective. ☺
    Cheers
    Roger

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  • Arcane
    replied
    Originally posted by Bob Engelhardt View Post

    It took me a minute to realize that what you really said was: "Very nice _,_ mower". Before that I was looking for the post about somebody's lawn mower.
    You weren't the only one.

    Leave a comment:


  • Cenedd
    replied
    Originally posted by Hopefuldave View Post
    I suppose I could get a fridge for the girly prosecco, or use the one with the Loctite in it if I allow 'em in...
    Oh you don't want to allow others in.... defeats the point! Maybe if they can answer a basic machining question to prove they're worthy of being saved!
    On a serious note, hope that everyone is ok and stays that way - both physically and mentally (apply booze as required!). Stay safe and may none of you run out of bog roll!
    Last edited by Cenedd; 03-22-2020, 02:42 PM. Reason: Correction of fat-fingered'ness

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  • Hopefuldave
    replied
    Originally posted by Cenedd View Post

    Simply move your beer-fridge into the 'shop and you could be safe for weeks!
    The Shed of Danger is already at cellar temperature to suit Proper Beer, I suppose I could get a fridge for the girly prosecco, or use the one with the Loctite in it if I allow 'em in...

    Dave H. (the other one)

    Leave a comment:


  • Cenedd
    replied
    Originally posted by Hopefuldave View Post
    I'm pretty sure the virus is killed by paint thinner, cutting oil and coolant fumes, too - hasn't got me yet!
    Simply move your beer-fridge into the 'shop and you could be safe for weeks!

    Leave a comment:


  • Hopefuldave
    replied
    Originally posted by 140mower View Post

    Social distancing in my little shop can be difficult at times, but all machines look healthy so far......
    I'm pretty sure the virus is killed by paint thinner, cutting oil and coolant fumes, too - hasn't got me yet!

    Dave H. (the other one)

    Leave a comment:


  • 140mower
    replied
    Originally posted by thaiguzzi View Post

    +1, very nice.
    However, what gets me with virtually all ER chucks i've seen mounted straight onto the spindle, is the apparent excessive overhang.
    Or is it just me?
    Thanks for the kind words, I've seen some examples of your work, and I must say in comparison, my amateur efforts look pretty crude.
    Although it might not look it, it actually overhangs almost an inch less than any of my regular chucks. It would be nice to have a direct fitting set of 6k collets, but with three hungry lathes, two shapers and a pair of needy milling machines, everybody needs to get along and share whatever precious tooling I have available. Social distancing in my little shop can be difficult at times, but all machines look healthy so far......

    Leave a comment:


  • Bob Engelhardt
    replied
    Originally posted by BCRider View Post
    Very nice mower !
    It took me a minute to realize that what you really said was: "Very nice _,_ mower". Before that I was looking for the post about somebody's lawn mower.

    Leave a comment:


  • Toolguy
    replied
    On many lathes, if you get the workpiece too close to the headstock, you have a hard time getting the cutting tools far enough to the left to reach the part. With the collet further to the right, it's a lot easier to work on the parts that are in the collet.

    Leave a comment:


  • thaiguzzi
    replied
    Originally posted by BCRider View Post
    Very nice mower !
    +1, very nice.
    However, what gets me with virtually all ER chucks i've seen mounted straight onto the spindle, is the apparent excessive overhang.
    Or is it just me?

    Leave a comment:

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