Skew blade templates for the LV Honing Guide II *LINK*

Skew blade templates for the #79

Derek Cohen (in Perth, Australia)

>Part 2

Making a template for the #79 is exactly the same. I have not made one yet (i.e. is untested), but took a few pictures and measurements.

1) Settings for a 25 degree bevel are: Green (#3) on the Honing Guide, and Red 45 degrees on the Registration Jig.

2) The template is calculated as above.

3) See pictures below for angles involved.

The rest is up to you.

Regards from Perth

Derek

Re: Skew blade templates for the LV Honing Guide I

William Duffield, on the Cohansey

>I think you are missing something, Derek. Don't you have to measure the skew angle normal to the blade's bedding angle, instead of normal to the sole of the plane?

It's difficult to tell from your photo, but it appears that the blade of your square is parallel to the base of the plane. If the difference is not apparent in a low angle plane, try the same test with a #46, or any other skewed, bevel down plane in your arsenal.

Note that since the L-N #140 has a signifantly lower bedding angle than the Stanley, you will introduce less error when measuring the L-N than the Stanley by the method I am assuming you are using.

Re: Skew blade templates for the LV Honing Guide I

Derek Cohen (in Perth, Australia)

>Hi William

I took the bevel measurements from skew blades that have known bevel angles. This was done manually first, then measurements checked with my Starrett protractor. They were not calculated on the blade projection (on the Registration Jig) for blades with straight edges. While I have only needed to use the template for the #140 so far, it indicates to me that the process I have used (and the calculations) are correct.

Regards from Perth

Derek

William ...

Derek Cohen (in Perth, Australia)

>Hi William

I meant to ask you how you would go about drawing up a template, if you viewed the process differently. (Perhaps I am missing something).

As I understand it, there are two factors to contend with:

1) The blade projection on the Registration Jig.

2) A template to set the blade so that, although set at an angle, it hones square to the Guide.

What I have done (above) works successfully. But I have not tried it out on a #46 which, as you say, is a different kettle of fish. I'm not sure why (yet), so I will have a look at my #46 blades tomorrow (it is late Sunday night here) and report back later.

Regards from Perth

Derek

Re: Skew blade templates for the LV Honing Guide I

William Duffield, on the Cohansey

>OK. It's been a long time since I've done a lot of trig, especially in three dimensions. I'm rustier than most of my tools, for sure. I'll see what I discover when I get back to the "lab", but I may not report back, especially if I decide I agree with your results. I was going to go take some photos of the #98 and #99 blades in the new guide, but before I could go through the whole procedure, I found MIke Wenzloff had already posted a link to his photos of positive results, and anything I would have done would have been redundant.

Re: Skew blade templates for the LV Honing Guide I

Lyn J. Mangiameli

>As excellent and most helpful series of posts, which I hope you will consider developing into a free standing article that can be archived.

I have done something similar with angle blocks, but had the fortune of having my planes (the L-N versions) having been equally and accurately machined. Haven't tried this with the 98/99 irons as I use them so rarely.

I have no idea what the L V eventual solution will be, though we all know I wish it were already available. I suspect that regardless of the evenutal L V solution, your method will offer an inexpensive and versatile alternative.

I agree...this should end up as an article

Christopher Fitch @ Memphis

>Excellent stuff Derek...

Re: Or the LV "instr" link...

paul womack

>with proper credit to Derek, of course.

BugBear

Nice Job Derek...

Scott Burr in Ben Lomond CA

>Thanks for posting this, and answering my question.