Thread: Small job - riving knives

Hi James,

I got one finished, the other one will have to wait for a couple of days, I've got some on-site work to do.

For anyone interested in making a riving knife, here are a few pictures.

Old 14" saw blade from the local saw sharpening place, no charge, if you ask nicely they will be happy to give you an old blade, just watch out for cracks and warps, this one was nice and straight and only a few minor cracks close to the teeth, which was most likely why it was scrapped. Thickness 100 thou ( pretty close to 2.5mm )



Make paper template. and figure out where to do the rough cuts



Stick paper template in place for initial shaping


Rough out the shape with angle grinder and thin cut off wheel, the slot for the mounting bolt was filed by hand, and then the edges finished off on the linisher. I started forming the bevel, but James can finish that to suit his setup. (I don't think its critical, so long as the riving knife enters the kerf cleanly.

Here is the finished part, after surface grinding, finished size 97 thou..





Regards
Ray

Looks great Ray.
Whats that you're using to measure the blade thickness?(and does BT have one)

Stuart

Originally Posted by Stustoys

Whats that you're using to measure the blade thickness?(and does BT have one)

Hi Stuart,

I've got my fingers crossed, BT doesn't have one, but I wouldn't be surprised...




It was a pickup from Denman Robinson, spring loaded, measures up to 1/4" and up to 2 1/2 inches depth. No brand that I can see, and the label inside the box is mostly missing. It's the perfect thing for measuring saw plate thickness.

Regards
Ray

Originally Posted by RayG

Hi James,

I got one finished, the other one will have to wait for a couple of days, I've got some on-site work to do.

For anyone interested in making a riving knife, here are a few pictures.

Old 14" saw blade from the local saw sharpening place, no charge, if you ask nicely they will be happy to give you an old blade, just watch out for cracks and warps, this one was nice and straight and only a few minor cracks close to the teeth, which was most likely why it was scrapped. Thickness 100 thou ( pretty close to 2.5mm )



Make paper template. and figure out where to do the rough cuts



Stick paper template in place for initial shaping


Rough out the shape with angle grinder and thin cut off wheel, the slot for the mounting bolt was filed by hand, and then the edges finished off on the linisher. I started forming the bevel, but James can finish that to suit his setup. (I don't think its critical, so long as the riving knife enters the kerf cleanly.

Here is the finished part, after surface grinding, finished size 97 thou..





Regards
Ray

Ray

It looks superb! Thanks again and obviously no worries about the wait!

Cheers

James

Certainly a neat piece of kit Ray.
Thanks
Stuart

Nice job.
Mine didn't come out as neat as that