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Last edited by MyrtleLake; 05-23-2023, 09:25 PM. -
...Last edited by MyrtleLake; 05-23-2023, 09:25 PM. -
I only have a partial idea of what you're looking at--basically a chop saw by the way you describe it. The proper
way to set something like that up is to have an arbour supported by bearings that has the blade on one end and
the driven pulley on the other. I can't imagine how your setup works if there are no bearings on the shaft...Keith
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Just one project too many--that's what finally got him...
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I don't think there is a drive pulley here.... the blade just rolls along as it cuts. Think pizza cutter. Yes?CNC machines only go through the motions.
Ideas expressed may be mine, or from anyone else in the universe.
Not responsible for clerical errors. Or those made by lay people either.
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Generalizations are understood to be "often" true, but not true in every case.Comment
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How fast of an actuation does this need to be for blade engagement in the process?Originally posted by MyrtleLake View Post
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Jerry- head to a sewing center. They have and use all kinds of rotary cutters in different diameters that should spark your imagination.Comment
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A guess is this is some sort of fabric cutter ?
I use 35mm Olfa rotary cutting blades for cutting carbon fiber and fiberglass cloth.
Use a C shaped blade holder, the blade arbor is supported on both sides between two plates, with enough clearance for the blade and wave washers,
use bronze sleeve bearings and spring load the vertical movement so the blade edge does'nt get smashed on the downward stroke, it'll also maintain a constant pressure during the cut.
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Could make a fork style holder that would support the blade on both sides.Helder Ferreira
Setubal, PortugalComment
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It would be much easier for everybody and you especially if you can draw your assembly on paper and show us the picture.
If you want the circular blade to be attached to the shaft, which can rotate in the bearing, I would suggest to use 2 bearings, spaced from each other by a small amount. The shaft would have a shoulder and a way to retain it in the bearings (threaded nut would be nice). To do that you need to use bearings with bigger ID, like 10 mm. This way the shaft would be fixed to the housing and easily removable. You also need to decide how to attach the blade to the shaft.Comment
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If you have space for the sleeve, you have room for one more bearing (and shorter sleeve). It looks like your blade is spaced away from the bearing and 2 bearings would support side load much better. With 2 plates 8 mm thick each you can place two 608 bearings right there. The shouldered shaft with a sleeve and a nut at the end would fix the assembly in axial direction too with the blade 6 mm away from the housing.
Is it helpful now? And please have some respect for the people on the shop floor, don't call them idiots.Comment
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Thank you for your insight.Comment
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