Some (Stupid) Questions

[Cruzi]

Hi all,

Recently aquired a Ryobi thicknesser, and been searching the forum for a few answers on sharpening blades and found a great jig for it in this thread (http://www.woodworkforums.ubeaut.com.au/showthread.php?t=43559&), the wooden block one, no grindng wheels here.

http://www.woodworkforums.ubeaut.com.au/attachment.php?attachmentid=9791&stc=1


There was also a discussion on hollow grinds, micro bevels etc.

Stupid Question No 1:
What is a hollow grind?

Stupid Question No 2:
Micro Bevels on Thicknesser Blade, Yay or Nay?

Stupid Question No 3:
Would Double Sided Blades Present a Problem in above Jig?

Stupid Question No 4:
Using the block in above post and scary sharp method, is angle really critical?
ie; If blade angle is 47 Degrees, my block is 45 Degrees, wouldn't the micro bevel eventually become hone angle? Is this really a problem other than taking more time to sharpen?

[rsser]

I'm no expert Cruzi but FWIW:

1. Hollow grind is a concave bevel produced by a grinder wheel.
2. My two lekky planes/ buzzers have no micro-bevel.
3. Can't see why, unless the sharp edge drives further into the slot on one side versus the other, so changing the bevel angle slightly.
4. I doubt whether a couple of degrees would make a critical difference. Just remember to take the wire edge off.

Hope this helps.

[Cruzi]

Thanks for the help Ern :2tsup: