How to sharpen your hunting and fishing knives – properly
Geoff Furborough has a few passions – guns, dogs and engineering. Geoff has searched for a sharpening system that gives consistent angle on his hunting and fishing knives and being unable to find something that works, lead him to planning and manufacturing his own device which has been a thought process lasting ten years.
Scary Sharp is manufactured by Hawera Rewinds Limited, a small business involved in the electric motor industry with some engineering manufacturing capabilities.
To make a wooden item to test the principle was half an hour – the longest step in the stainless steel prototype was travelling to have the folding done.
Geoff’s choice of angle is 22˚ with a machined nylon block to offer other options for the final stages of achieving a sharp edge.
The old timers all have two common comments:
1. “The angle isn’t critical but the consistency of that angle is.”
2. ‘The stone – oil or wet- should be permanently soaked, and cleaned.”
They are offering three stone choices:
Oil stone 25x50x200 fine/coarse (Norton)
Wet stone25x50x200 220/400 grit (Kinick)
Wet stone30x80x230 120/240 grit (Norton)
The most popular choice of stone is the Kinick wet stone, grit size 220/400,
With the oil stone – we soak the stone permanently in 50/50 kerosene and diesel, an unpleasant combination, but in the sharpening process we useCRC5-56 or WD40 to lubricate the stone.
They offer no advice on the use of a steel – go to Google ‘How to steel a knife” the main theme from this is ‘the stone sharpening sets the angle – the steel finishes the edge off”.
If you have the right combination of factors that all work; that is the relationship of stone material, knife blade material, lubrication and angle, the knife can be very scary without using a steel.
The critical factors geometry, (consistency of angle), blade material, stone material.
This system will always make a knife sharp – going from sharp to scary sharp can still need a hand skill.
Progressing the knife from sharp to Scary!!
Final honing or dressing the cutting edge can be done without a steel – the softest of touches using the nylon block to shift the abrasive action of the stone to the outer cutting edge – also progress the stone in 2 directions at once, along the blade and across the blade.
Just to complicate the issue; recently Geoff sharpened a couple ofNew Zealandmade knives, sharp was easy, scary seemed impossible.
Scary was achieved by changing some of the variable factors - by hand with extreme pressure on the stone.
Three or four swipes per side changed everything in seconds. In short, if you are not getting sharp enough – change things.
Sales Manager: Graham Carter P: 07 8551833 M: 021 02600437 E:
W: www.fishingoutdoors.org P.O. Box 10580, Te Rapa, Hamilton 3240 Facebook