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Thread: Steel nose bandsaw sled (for single point action) with step by steps

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    Supporting Member Toolmaker51's Avatar
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    Quote Originally Posted by Make Things View Post
    This is great information! The only way I ever 'rip' metal is by using a grinder, like a caveman beating an animal to death with a club. I didn't realize it went beyond woodworking, but, I mean, it's the same set up with more teeth, right?
    More teeth, yes. Rule of thumb is minimum 3 of pitch to material wall or overall thickness. IOW, 6" tubing of 1/4" wall, or 1/4" plate; same minimum pitch. Most metalworking band stock is not nearly so coarse as woodworking blades. However; good woodworking blades are terrific in aluminum up to 6061. 7075? Get a chair. . .

    There's call to split bar stock, really more of a contour job, a connecting rod type shape, plentiful usable remnants. Nothing outperforms band saws in preserving material. Plasma or oxy-acetylene could of course; band saws don't raise such a burr or toughen surface by carburization.
    Square and rectangular tubing present different consideration. Those are rolled from flat sheet, via radiused corners, ~ perpendicular sides and submerge welded seam.
    They're now loaded with internal stresses. Splitting one way, they'll usually spread open, sometimes closing on blade. A shim of blade kerf+ thickness works. Also depends where cut taken; through the middle or nearer one wall.
    The most difficult tubing are those thinner walled with broad faces and narrow edges, creating chatter and vibration of unsupported material. Die springs or adjustable parallels on cardboard can fix that, while steering blade to avoid.

    **Somewhere I've mentioned band saws are the pinnacle for separating parts from remnant; least amount of waste in chips, cutting near net of desired part, retaining larger drops for other use....
    Very true, 1 caveat versus Wire EDM; yet far more precise, broader range of materials, virtually no chip loss (= wire size), no heat imparted, can create mating parts in one operation, ie punch & die.
    Great if footprint, cost per hour, electrolyte, spools of wire and programming are no issue.
    Last edited by Toolmaker51; May 16, 2023 at 04:50 PM.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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