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#1
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Delta TS arbour
I was trying to do a 1/4" dado with my Delta contractor's saw. My dado
set is a Freud. There seems to be a spot on the arbour for the first blade (or any blade for a non-dado cut) to sit and then there is a bit of a narrower spot before the threads start. The outer blade has a lot of play in that position. A chipper is wider and seems to be ok. The dado blade sits ok when it is on the threaded part of the arbour. In the end I couldn't get a flat bottom on the dado cut because the leftmost dado blad had play on the arbour. Anyone encounter this? Any suggestions? Robert |
#2
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Delta TS arbour
wrote in message ups.com... I was trying to do a 1/4" dado with my Delta contractor's saw. My dado set is a Freud. There seems to be a spot on the arbour for the first blade (or any blade for a non-dado cut) to sit and then there is a bit of a narrower spot before the threads start. The outer blade has a lot of play in that position. A chipper is wider and seems to be ok. The dado blade sits ok when it is on the threaded part of the arbour. In the end I couldn't get a flat bottom on the dado cut because the leftmost dado blad had play on the arbour. Anyone encounter this? Any suggestions? Don't know if it's been damaged? How close a look have you given the arbor? Spinning a loose blade could have damaged the leads, or your dado set may be like mine, also a Freud, but with a greater problem. When I tuck the blade up against the flange it seems loose by comparison, but seats well enough, and I don't get any more of a cut on that side than the opposite. My standard blades seem fine, so I thought it was just my Freud set. Sure is fun trying to snake the cutters over that arbor, isn't it? Shims are really a nightmare. |
#3
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Delta TS arbour
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#4
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Delta TS arbour
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#6
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Delta TS arbour
"RayV" wrote in message ps.com... Mike wrote: wrote: I was trying to do a 1/4" dado with my Delta contractor's saw. My dado set is a Freud. There seems to be a spot on the arbour for the first blade (or any blade for a non-dado cut) to sit and then there is a bit of a narrower spot before the threads start. The outer blade has a lot of play in that position. A chipper is wider and seems to be ok. The dado blade sits ok when it is on the threaded part of the arbour. What about using a spacer to shift everything over so that the entire dado stack is over the threads? While that wouldn't work for a full width dado, 1/4" should be fine. Mike Good idea. Make sure it's a properly lapped spacer, not just a washer, so you don't screw up the precision face on the saw. |
#7
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Delta TS arbour
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#8
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Delta TS arbour
P.S. Mine is a Delta too.
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#9
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Delta TS arbour
On Fri, 01 Dec 2006 11:25:20 GMT, "George" wrote:
wrote in message oups.com... I was trying to do a 1/4" dado with my Delta contractor's saw. My dado set is a Freud. There seems to be a spot on the arbour for the first blade (or any blade for a non-dado cut) to sit and then there is a bit of a narrower spot before the threads start. The outer blade has a lot of play in that position. A chipper is wider and seems to be ok. The dado blade sits ok when it is on the threaded part of the arbour. In the end I couldn't get a flat bottom on the dado cut because the leftmost dado blad had play on the arbour. Anyone encounter this? Any suggestions? Don't know if it's been damaged? How close a look have you given the arbor? Spinning a loose blade could have damaged the leads, or your dado set may be like mine, also a Freud, but with a greater problem. When I tuck the blade up against the flange it seems loose by comparison, but seats well enough, and I don't get any more of a cut on that side than the opposite. My standard blades seem fine, so I thought it was just my Freud set. Sure is fun trying to snake the cutters over that arbor, isn't it? Shims are really a nightmare. Often, the higher the blade quality the more difficult it is to mount the blade because the high quality blade manufacturers hold closer tolereances at the center hole for diameter, ovality, and true position, offering less clearance in the arbor to blade fit. Of course, that's a good thing. Delta, (if this is a domestic saw) used functional go/no go ring gages rather than multiple tri-mikes measurements to check dia. and ovality because this guaranteed a functional arbor despite any natural process lobing. Tri mike readings might miss the " lobes" of the machining process and check good but not provide a functional fit. But often the process of cutting an acme thread rolls up an almost imperceptible burr. The arbor would allow easy mounting of inexpensive blades with "large" center holes, but make the mounting of very high quality blades a little more difficult. I always recommended "touching" the arbor shaft (blade removed, bump the saw on) with a strip of emory cloth to remove the burr and polish the shaft. In the OP's case, it sounds like some damage to that portion of the arbor, or else the diameters of the blade center holes are at different spots in the tolerance range. There are other possibilities, but they are less likely. Frank I represent no one but myself |
#10
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Delta TS arbour
Frank Boettcher wrote:
In the OP's case, it sounds like some damage to that portion of the arbor, or else the diameters of the blade center holes are at different spots in the tolerance range. There are other possibilities, but they are less likely. Frank No, it's not damage; this is a known problem. This is the reply I got from Freud when I thought the problem was the dado: "In almost 100% of the time it is not the dado but the arbor of the saw that is the problem. Craftsman and some other contractors saw are a problem because the threaded portion is undersized. This causes the components to not be aligned properly so you never get a flat bottom." |
#11
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Delta TS arbour
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