Thread: Woodpeckers Honing Plate System is here

Do you know the tolerance for flatness with the plates Grahame?

Originally Posted by rsser

Do you know the tolerance for flatness with the plates Grahame?

Hi

My immediate response was going to be 'b#$*&@y' flat, but in the interest of accuracy, I asked the guys at Woodpeckers to test a batch, the result was 0.0015" tolerance, therefore my original thoughts were right.

The system is beautifully made and is easy to use, 'though the 0.3 micron film is so fine it takes a bit to work out 'which side is up' FYI 0.3 micron equates to less than 4 thousandths of the thickness of a human hair, now that's 'b#$*&@y' fine.

Regards

Grahame

Graham, so the flatness is out 0.0381mm over the 356mm length . . . So the gradient is 0.010702 % Grade . . . 0.0061319 DEGREES. Geez I wouldn't want to push uphilll

Flatness Tolerances AS/NZS 1365:1996 and AS 1548:1995

Originally Posted by Pat

Graham, so the flatness is out 0.0381mm over the 356mm length . . . So the gradient is 0.010702 % Grade . . . 0.0061319 DEGREES. Geez I wouldn't want to push uphilll

Flatness Tolerances AS/NZS 1365:1996 and AS 1548:1995

Pat

The test was simply, what was the variance over the whole plate? The answer 0.0015".

Regards

Grahame

LOL.

Well, this system is based on the Scary Sharp principle, ie. abrasive sheet on a flat surface.

Most SS users employ plate glass. The variation there is a hundredth of an inch.

No drama on the bevel with that, but if you're lapping and polishing the back of a plane blade or chisel, you quickly run into problems if you're using hardware shop W&D.

But the striking thing about WP's is that their figures are not manufacturer's design specs, they're outcome measures.