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Thread: Quick bevel tool

  1. #11

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    Stevohdee's Tools
    Thanks dick for your comment, much appreciated,
    regards
    Stevoh

  2. #12
    Toolmaker51's Avatar
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    Quote Originally Posted by Stevohdee View Post
    Thanks toolmaker 51, now ya got me thinkin, hmm, could have used quick parting tool recently & spring return? Hmm, great input, have thought about increasing travel somehow.
    thanks
    Stevoh
    Most lathe hands will state parting their least favorite task. Added [excess] travel puts greater deflection on the extended bit...not a happy time for parting tools.
    Narrowing effective [cutting] width reduces it...That explains why parting tools have a tall profile in comparison to width. The round bit has great clearance without the support underneath.
    The round bit is used in milling too, called a "D" bit; initial clearance provided by grinding upper edge past centerline.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  3. #13

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    Yep, you're right, parting tool out of the question... Unless whole unit moves with tool... Back to the drawing board!! Thanks again

  4. #14
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    Quote Originally Posted by Stevohdee View Post
    Yep, you're right, parting tool out of the question... Unless whole unit moves with tool... Back to the drawing board!! Thanks again
    That sounds like a natural development; anchoring pivot side so tool and holder move together, minimizing unsupported tool.
    Your square-tipped bit is efficient, proven by plunging into solid material. Your tool may or not part well in every case, depending on material, depth and proper grind. It should perform 'necking', which is parting without full penetration. Also, there's a process to relieve inside corners; plunging in a short distance at 45° so perpendicular surfaces accept flush mating parts.
    Quick bevel tool-relieved_fillet.jpg
    Such a cutter needs back clearance on each side, eliminating a jam in the narrow groove. A tiny radius will blend surface marks, helping avoid a jam.
    To chamfer open corners, a small radius on each side of bit will reduce [blend] tool marks of hand-fed cutter movement....As only one face is cutting, the extra contact shouldn't generate too much load on the tool.
    Last edited by Toolmaker51; 06-20-2018 at 09:54 PM. Reason: sketch added
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  5. #15
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    Thanks Stevohdee! We've added your Bevel Tool to our Lathe Accessories category,
    as well as to your builder page: Stevohdee's Homemade Tools. Your receipt:




  6. #16
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    Thanks Steve,
    Really a good idea, I think at a Tripan version of your tool with your permission.
    Have a nice day.
    Pierre

  7. #17

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    Hi Pierre, thanks, no permission needed, look forward to seeing your version
    Cheers stevoh

  8. #18
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    Thanks,
    If you're interested, here is the page with the Tripan customisation I made. ;-)

  9. #19

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    Stevohdee's Tools
    Thanks for the link, much appreciated

  10. #20
    Toolmaker51's Avatar
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    I found the link to various Tripan holders interesting too. Best [so far, there's a bunch!] may have been the sphere generator. I suppose it's linked to swing of particular lathes, but rotating on horizontal axis seems far more ergonomic. Naturally avoids tailstock interference better, not everyone has 4' [1200mm] of bed to park things out of the way.
    The off-lathe height setter is very clever. You'll see right here on HMT.net, all manner of interpretations achieving cutters on center, ALWAYS dependent on being in the lathe first. OK, logical enough but following the lead of how QC mill tools are preset, I don't recall ever seeing lathe tools handled this way. Very good idea Okapi!
    Some holders were harder to visualize their intent, such as 2 parallel dial indicators [jpegs "Tripan14-17]. Care to describe or illustrate that in use?
    It appears you select French language for your site, does that mean you are in the western linguistic quarter of Switzerland?
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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