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Thread: Zero clearance throat plate
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17th August 2010, 12:18 AM #1
Zero clearance throat plate
Ok I made a zero clearance throat plate for my new table saw from 12mm exterior ply ,great for when the blade is at 90 deg to the table.
On the weekend I was mitring some stock for edge trimming a shelf under my thicknesser table to take a dust collector .
I had the blade tilted left over to 45deg and cut the first mitred end ,the little piece that was cut off decided to go down between the blade and the edge of the plate (to the right side of the blade) , jam and flick out at high speed ,just missing my cruit.On inspection it had deflected the blade down and caused a step in the face of the mitre cut.
Now my question is , is it possible to make a zero clearance insert for 45 deg cuts ? I have tried to work this out in my head trying to visualise how to do it .But I cant see how it would work with out creating a large slot in the insert.
Also I would be rather pithed off if I damaged the blade ,myself ,or my machine.
Any way a zero clearance plate would be good , but how to make it ? with the saw like is done with the 90 deg model or by other means?
Kev"Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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17th August 2010 12:18 AM # ADSGoogle Adsense Advertisement
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17th August 2010, 01:37 AM #2
Kev I use the front fence on my sled for mitre cuts that way the 45 deg kerf is only the length of the work very accurate and a lot safer I reckon. Got to clamp the piece to the fence though or things can get ugly.
I don't have a 45 deg throat plate but I don't see why you can't tilt the blade and just raise it through the plate that is clamped in position.Mike
"Working to a rigidly defined method of doubt and uncertainty"
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17th August 2010, 09:45 PM #3
I though about using the mitre gauge set at 45 and leaving the blade at 90 and using the zero plate ,but I like to cut the 45 across the width rather than the thickness ie the timber on the face rather than on the edge.
Because the blade travels in an arc as you crank it over it would cut a wide kerf in the plate , plus once the teeth break through the ply it would not cut once the teeth got above the top surface of the ply and the blade body would rub on the ply.
Bit hard to explain .
I'll think more on it..
Thanks for your reply .
Kev."Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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17th August 2010, 09:59 PM #4Taking a break
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Probably not ideal, but you could use a sacrificial bit of MDF/ply/whatever to support the piece being cut
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17th August 2010, 10:25 PM #5
Woodlee,
How about cutting the shape required, then mark accurately where the saw cut would land in its 45 degree position, and how high you would be running the blade....then make a slice into you newly shaped piece but don't cut all the way through. Now you just need to cut a fill in piece to go into the sawcut of the zero clearance piece from the back of the blade to the outside of the clearance piece. So now you have it ready to work,.. to fit, you would need to remove the 90 degree clearance plate, tilt the saw over to 45 and adjust height them put the 45 plate over saw and into position.
It would be easier to draw it in some sawdust on the floorJust do it!
Kind regards Rod
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17th August 2010, 10:37 PM #6
Kev, I must be missing something. Can you not just fit a blank insert turn the saw on and wind it up through it at 45º ?
Cheers
Michael
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24th August 2010, 10:55 PM #7
I dont think so as the blade travels in an arc as it winds from 90 to 45 and the side of the blade will rub on the insert as it comes through .
Ill try it but I dont think it will work.
Kev."Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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25th August 2010, 08:37 AM #8
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25th August 2010, 10:48 AM #9
As suggested the easier option would be a sliding table/sacraficial board. Get a big board, cut it about 3/4 of it's length, put your job atop it. I'd use 1/4 ply or something so you don't lose too much saw blade depth.
I have my router side table so I can always do 45 degree faces with a chamfer bit.
2c.I'm just a startled bunny in the headlights of life. L.J. Young.
We live in a free country. We have freedom of choice. You can choose to agree with me, or you can choose to be wrong.
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25th August 2010, 10:53 AM #10
Hey Woodlee,
I don't think that trying to wind the 45 degree blande up through a blank will work, as the height adjustment goes straight up and down and not at the angle of the blade (on My saw anyway). My solution would be to make a Sled dedicated to 45 degree cuts, or as stated before use a Sacraficial board under your good piece. A sled with a coulpe of adjustable Toggle clamps would be the go IMHO.
HazzaBIt's Hard to Kick Goals, When the Ba^$%##ds Keep moving the Goal Posts.
Check out my Website www.harrybutlerdesigns.com.au
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25th August 2010, 11:13 AM #11
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27th August 2010, 05:40 PM #12
As Hazza says that's what I was trying to describe .
I think I have it worked out , start out with a blank throat plate ,and the blade at 90 and wind it up through the plate ,wind it back down tilt the blade 5 or 10 deg then wind it up again , wind down tilt anther 5-10 deg and wind up again and so on until you get the blade over to 45deg. It's a bit of work but I think it's the only way to do it.
Will try it on the weekend and see how it goes.
A sled would work .
Kev."Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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27th August 2010, 06:31 PM #13Out of my depth
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27th August 2010, 06:49 PM #14
Hi Woodlee, I just finished man handling my saw (woo hoo ) off my ute. I removed the top to lighten the load and i couldn't help noticing that the height adjustment pivots with the blade. You should be able to wind the blade all the way in. Tilt to 45 then turn the saw on and wind it up through the blank throat plate while it is at 45 as described by Mic. Of course i don't even have it together yet so i could be just deleriously hysterical. But I couldn't help having a bit of a play and that's how it looks.
Must say i'm very happy with the quality and finish of the saw. So far.Those were the droids I was looking for.
https://autoblastgates.com.au
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27th August 2010, 11:15 PM #15
NC ,
I'll try it tomorrow.
BTW you will love the saw .
Kev."Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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