sharpening chipper blades

[bill]

does anyone do it themselves on a grinder?

[Mr Ed]

On a proper knife grinder, or with a disk grinder?

[MattyF]

mine go to a work shop for £30 quid ill get 4 knives done and balanced

[vduben]

one of the blokes i work for has a special grinding tool,

i bet it would be very hard with a angle grinder to get a parallel edge

[bob]

i sharpen them myself got a 8inch bench grinder with a special white wheel and an adjustable sharpening guide needs a little at a but time lots easier than taking them to be sharpened

[A_lopa]

I just purchased a proper machine to do mine as i dont like running dull knives at all(pet hate)

 

Before that i would touch them up on a bench belt sander, them get them proffesionally done every 2-3 cycles..

[FJR]

Yeah we have a machine that sharpens chipper knives. Doesn't see a whole lot of action because we have so many sets. Once every set has been used we run them all through the machine.

[Stumper]

I sharpen mine on a simple "bench grinder" set up. It realy isn't hard to do a decent job. The important things are wheel speed(fast isn't good since it canlead to overheating the edge) and set up a rest so that you can get your angle consistent. Sharpen them evenly so the set is matched.

[Simon]

If you going to re sharpen your own blades with a hand grinder here are some good points to follow

. Try not to over heat the cutting edge, this will anneal the blades hardness and cause it to dull of quicker

. stick to the recommended angle specified in your hand books, a couple of degrees either way might not sound much but it has a big effect on your bearings, blades and economy ( Hence the chipper will run like a bear with a twisted ankle)

. I’ve seen hundreds of blades that have been hand ground and the biggest problem is- the bevel edge is not straight in fact it’s more like a radius only the wrong way. It may appear quicker and cheaper to just take the cutting edge sharp but if the rest of the blade doesn't follow suit then be warned it will cost you eventually

 

Dont have nightmares i am always a shout away if you need blade advise.

 

Simon

[Steve Bullman]

i seem to remember a few years back timberwolf started to recommend the blades were sharpened with a concave surface rather than straight surface....if i also recall right didnt they change their mind on this? whats the current recommendation regarding that?