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View Full Version : Hold down (and out) roller for TS


Nissim Avrahami
08-14-2006, 3:47 PM
Good day

I had it in mind for long time and today, I made it.

It works very good, pressing the wood (board) down to the table and keeps it attached to the fence.

Maybe it's better to make it with 2 rollers, one in the front and one on the back.

Sorry about the 4mm, it’s 5/32”.

Any comment will be appreciated.

Some of the pictures are not clear because I made them with my left hand while pushing the wood with my right hand “in action”, sorry.

Regards
niki



http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD1.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD2.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD3.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD4.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD5.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD6.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD7.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD8.jpg


http://i50.photobucket.com/albums/f321/avrahami/Hold%20down%20roller/HD9.jpg
Julio Navarro
08-14-2006, 6:02 PM
I've had a similar project in mind, I took my sons skateboard away so I could use the rollers. They are a rubbery/neopreen very tacky type of plastic and there are two wheels per axle. It should grip the wood well.

I like the idea of the roller being slightly turned towards to fence to help keep the wood tight against it.

I think you would only need one roller in front where the blade wants to push the wood up. Behind the blade tries to push the wood down.
Don Baer
08-14-2006, 6:08 PM
Nissim,
I like you rollers guides, Too bad the hold down wheel doesn't have a backstop to prevent kickbacks too.
Aaron Beaver
08-14-2006, 6:09 PM
What about different thicknesses of boards do you change the spacers or if its a thicker board the roller just puts more downward pressure on it.
Nissim Avrahami
08-14-2006, 7:07 PM
Thank you all for your kind replies

Julio
Thanks for the advice; I’ll leave it as it is with one roller behind the blade.
I thought that another roller before the blade would help to keep the board attached to the fence.

Don
I did not see yet a roller (of this kind), that has a “one way” rotation (at least not in Poland).

Aaron
Yes, you are correct, I’m changing the spacers for different thickness.
Maybe I could do it with adjustable screws and nuts, but it will be very “flexible”, that way, with the spacers, it’s very rigid (larger contact area with the fence)

Thanks
niki
Larry Cooke
08-14-2006, 7:43 PM
Niki,

I like your idea here! Perhaps removing the axle on the wheel and replacing it with a bolt where by you could add a anti-kickback pawl on to it would work?

It wouldn't be terribly difficult to fabricate a pawl. Food for thought I guess.

Larry
Julio Navarro
08-14-2006, 7:54 PM
Niki,

I like your idea here! Perhaps removing the axle on the wheel and replacing it with a bolt where by you could add a anti-kickback pawl on to it would work?

It wouldn't be terribly difficult to fabricate a pawl. Food for thought I guess.

Larry The antikick back could be a ratchet mechanism as the axle??
Nissim Avrahami
08-14-2006, 8:43 PM
Thank you Larry

Maybe, it could be done by adding another piece of iron with sharp edge (lets call it pawl), under the iron lever, that will touch the roller.
As long as the roller is rotating to the correct direction, the pawl will slide on the roller (and add some friction).
Once the roller wants to rotate to the other direction, the pawl will “stab” the roller and because of the round shape of the roller, it will “lock” the roller and prevent reverse motion.

Personally, I don’t have problem with kickback, I keep the fence aligned and I have the riving knife that, as I know, prevents kickbacks.

niki