- Joined
- Saturday September 7, 2013
- Location
- Cambs UK
My understanding is that it's 17 to 18 either side. It seems more likely than less than 10 degrees - how do knives compare, something like 30?pugh-the-special-one said:UKRob said:Hi Mike. The Coticule.be website has a calculator that arrives at the bevel angle if you enter the spine width and blade width - from honing line to edge. So, given that an ideal bevel is between 17 and 18 degrees, you can calculate the rough dimensions.
That's combined 17 or 18 degrees Rob so about 9 degrees each side of the blade making a combined 18 so I'm thinking with a spine of 5mm dictating the angle that would be around 9 degrees.
mikew said:Oh Jamie doesn't get a say. I'll be posting one out to him
1 - UKRob
2 - pjgh
3 - BraveBlades
mikew said:That razor looks a beauty Jamie. What's the thickness at the spine?
I think the reason we don't see full hollow grinds these days is because you need a really small contact wheel. Something like a 4 or 5" diameter. Most grinders that are aimed at knifemakers will have 8 or 10" wheels hence the half/quarter hollow grinds. I plan on getting a grinder that can take small wheels when funds allow as I like full hollows too.
Rob, I'd love you to put it through it's paces.
I'll be using O1 tool steel for the first couple which, on knives anyway, takes a great edge and holds it well for a carbon steel. It will be very interesting to see how it holds up on a razor. I like it at 59 RC for knives so I'll start there and we'll see what happens.
It would be nice for historic reasons to use silver steel but it's only available in round bar so there's a lot more work involved.
I'm already getting excited!
mikew said:Hey Terry. I've made lots of knives now from 01 at 59RC but appreciate razors are a totally different animal. The reason I am avoiding silver steel is it means I have to get the hammer out. I prefer my steel to come in nice flat bars if possible
What line of work are you in?
Terrytoolpath said:mikew said:Hey Terry. I've made lots of knives now from 01 at 59RC but appreciate razors are a totally different animal. The reason I am avoiding silver steel is it means I have to get the hammer out. I prefer my steel to come in nice flat bars if possible
What line of work are you in?
Hiya Mike
I'm in toolmaking, moulds for the plastics industry, and often use 01 for guide rails/slides etc, I've got some 1 1/4 dia SS kicking about the shop and could easily cut a piece down to a 1/4 inch or so thick slice for you
mikew said:Am I the only one struggling to keep up here?
Rob, I've had a drink now so I'm thinking a bit more clearly. I think the coticule table is referring to what I would call the secondary bevel or sharpening angle which I imagine is 17 degrees or so per side. A knife would be anything between 15 degrees and maybe 30 degrees per side depending on the type of knife.
I was thinking earlier about the primary grind angle which probably doesn't matter one bit.
I'm beginning to remember why I've been putting off making razors!!
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