Home sharpening timber wolf blades

[morten]

Timberwolf blades are concave and have to be specially ground rather than flat ground, this is how the machines were designed to run.[ATTACH]97450[/ATTACH]

 

Wouldn't a wet grinder like the Tormek with a 25 cm diameter grinding stone give you exactly that concave shape, though?

[RobRainford]

Timberwolf blades are concave and have to be specially ground rather than flat ground, this is how the machines were designed to run.[ATTACH]97450[/ATTACH]

 

They can be flat ground too. Nigel atthe stand at jonesies show told me this.

[Hodge]

Why do they bother selling them concave then? Baffles me how they tell you 1 thing and mean another.

[old hand]

I can understand people sharpening their own blades in an emergency. But if you want the best performance from your chipper get the blades professionally sharpened to the manufacturers specification. With regard to blades being hollow ground, I have found that on Farmi chippers they chip better and with lower HP requirement (less fuel) when compared to bevel ground blades. I'm sure the manufactuers do them hollow ground for a reason!!

[slasherscot]

concave tend to work better on softer wood and flat grind on harder wood......concave tend to have a thinner cutting edge and chip more easier.......but i could be totally wrong

[treequip]

Why do they bother selling them concave then? Baffles me how they tell you 1 thing and mean another.

 

It's just part of the manufacturing process, flat ground blades are generally sharpened on a larger wheel, hollow ground blades are done on the outer face of a much smaller wheel, because there is less wheel on contact with the blade you get less heat build up in the edge and the machine needs much less power so th motor can be smaller and lighter.

 

As others have said hollow ground has a better attack on the edge, because it it slimmer it requires less effort to make it cut, but similarly it's slimness means the blade edge isnt as strong as a flat ground blade. Given the violent nature of wood chipping I think hollow ground is a disadvantage, I prefer flat ground for durability.

[Pat Ferrett]

Tormek will leave a hollow ground cutting edge

 

Yep Scheppach is one and the same

 

Im pretty sure Timberwolf used to sell a jig for sharpening the blades on a bench grinder

[jpbeaver]

I have a jig to sharpen timberwolf blades using a bench grinder. I think orange plant used to sell them years ago. I've not used it since I bought it.

[Pat Ferrett]

I can understand people sharpening their own blades in an emergency. But if you want the best performance from your chipper get the blades professionally sharpened to the manufacturers specification. With regard to blades being hollow ground, I have found that on Farmi chippers they chip better and with lower HP requirement (less fuel) when compared to bevel ground blades. I'm sure the manufactuers do them hollow ground for a reason!!

 

Do you sharpen your chains or do you have them professionally sharened aswell ?

[Ty Korrigan]

Personally,

I just rub them on my wifes unshaven thighs, that hones a real edge, she does her bread knife this way too...

Ty

 

Oh smile...it is Friday!