Thread: Lie-Nielsen now in Melbourne

Hi Suresh

That sounds like a match made in heavan! What you want to do now is get another blade for the #62 and hone a 35-37 degree microbevel (in one or two stages) onto the existing 25 degree primary bevel, giving you a 60-62 degree cutting angle for hardwood. That should be an eye-opener!

Regards from Perth

Derek

I had a look at the LN website and they did suggest getting a second blade, I did so.
Derek, do you only need a secondary bevel to get the high angle? I am so glad that you replied, I was going to grind back the original bevel on the second blade and regrind it. If I only need a secondary bevel it will make the whole process painless.
Thanks again
suresh

Hi Suresh,

I was thinking of doing exactly the same as you until Derek intervened a couple of weeks ago. Instead I followed his and others' advice. The outcome with the steeper secondary bevel is brilliant.

Enjoy the LN 62 it's a great plane.

Regards

Mike

Originally Posted by derekcohen

Hi Suresh

That sounds like a match made in heavan! What you want to do now is get another blade for the #62 and hone a 35-37 degree microbevel (in one or two stages) onto the existing 25 degree primary bevel, giving you a 60-62 degree cutting angle for hardwood. That should be an eye-opener!

Regards from Perth

Derek

Derek, I thought the bed angle for the #62 was 12 degrees, so a 35-37 microbevel will give a 47-49 degree cutting angle. Or has the LN got a higher bed angle?

has the LN got a higher bed angle?

No Slavo, only my arithmetic has got worse. Still a 12 degree bed. Add existing low angle bevel of 25 degrees. Total 37 degrees. You then need another 25 degrees to get you to 62 degrees (not 37 as I stated earlier).

Regards from Perth

Derek

Hang on a second. When you say "another 25 degrees", you are talking about honing a 50 degree micro bevel, are you not? If you honed at 25 degrees, you would be honing the same angle as the primary bevel, yes? So you are starting at 12 degrees and then honing some angle on the blade, therefore your cutting angle is 12 degrees plus whatever the final bevel is, micro or not. If you have honed a micro bevel, the angle of the primary bevel is immaterial... I think...

My head is spinning...

Silent, is what you mean that the micro bevel becomes the only bevel actually used, so it's angle is "the angle"? That's how I understand your post anyhow, makes sense cos the primary bevel is just getting rid of excess steel to save sharpeing times.

What if we add a back bevel?

OOPS, I feel giddy, gotta go lie down

Originally Posted by outback

Silent, is what you mean that the micro bevel becomes the only bevel actually used, so it's angle is "the angle"? That's how I understand your post anyhow, makes sense cos the primary bevel is just getting rid of excess steel to save sharpeing times.

What if we add a back bevel?

OOPS, I feel giddy, gotta go lie down

If you use a back bevel with a bevel-up blade, you won't be adding anything, you'll be subtracting from the angle. If the back bevel is sufficiently severe, you'll actually be lifting the cutting edge away from the surface of the wood!

Hi Driver,

Actually, you can put a small (less than 10 deg) back bevel on a bevel up plane. It will enable the edge to remain sharper a little longer. What it does is increase the included angle (sum of both bevels) without changing the effective cutting angle (the top bevel).

This is one reason why it pays to own a good honing guide. Makes it painless and accurate.

Silent, is what you mean that the micro bevel becomes the only bevel actually used, so it's angle is "the angle"? That's how I understand your post anyhow, makes sense cos the primary bevel is just getting rid of excess steel to save sharpeing times.

Yes, that's what I meant. I think :confused:

Actually, it was more a question of semantics (I hate that word). Derek was saying to hone a 35-37 degree micro bevel and then corrected himself by saying 25 degrees. But I would have said hone a 50 degree micro bevel because that's the angle at which you would address the blade to the stone. If the primary bevel was not 25 degrees, you could still hone a 50 degree micro bevel and have the same result.

I was just thinking in terms of how you would set the blade in a honing guide for example. I know the Veritas guide does it by adding one or two degrees to the set angle, so you might think in terms of that when talking about it but you can't just add another 25 degrees without resetting the blade.

Don't worry, it's me that's getting confused and I think I'll go have a cup of coffee.

Originally Posted by Driver

If you use a back bevel with a bevel-up blade, you won't be adding anything, you'll be subtracting from the angle. If the back bevel is sufficiently severe, you'll actually be lifting the cutting edge away from the surface of the wood!

You have now entered the twighlight zone.

Aren't you still adding to the angle? I know what you mean, and agree inregard to to lifting the blade off the surface, It doesn't sit at all well adding a back bevel to a bevel up plane.


I really do think we should all have our sedatives now.

Adding a back bevel to a bevel up blade is changing the clearance angle, which in this case is 12 degrees. If you hone a back bevel at less than 12 degrees then you'll be OK but if you hone greater than 12 then the leading edge of the blade will be off the timber and it will be riding on the back of the blade.

Increasing the included angle makes the edge stronger because there is more metal behind the edge, so as MikeW says it should maintain the edge longer. But does it make any difference to the cutting action?

Originally Posted by silentC

. But does it make any difference to the cutting action?

It will allow you to grind a 15 degree main bevel which will now give you a plane that cuts at 27 degrees. So now you need three blades, the high angle, the standard and the super low version.
http://www.woodworkforums.ubeaut.com...6&postcount=15

Originally Posted by outback

You have now entered the twighlight zone.

Aren't you still adding to the angle? I know what you mean, and agree inregard to to lifting the blade off the surface, It doesn't sit at all well adding a back bevel to a bevel up plane.


I really do think we should all have our sedatives now.

Y'know, the more I think about this, the more that comment about sex and boxes of chocolates begins to make sense. :eek:

I think a sedative-laced pancake might be appropriate round about now. :confused: