knives have a multitude of grinds suited to a specific task. few are interchangeable, at best you lose function of the edge, at worst damage it.
the three most common grinds used for wood carving are:
1). hollow ground
2). flat ground
3). flat over hollow ground
the hollow is a sharp and aggressive grind, it bites into wood and is very responsive to small changes in the angle in which the edge is presented. @tormek_sharpening
(#tormek) are without doubt the leaders and innovators in watercooled sharpening offering the best customer service i have had along with a range of machines that will never overheat the steel and yet still remove it quickly. they are extremely precise machines and offer the home and professional user the ability to dial in and repeat edges with utmost precision.
the flat grind is the most common, easily formed edge to wood working tools. it’s a nice balance of sharpness and aggressiveness in use as well as easy to attain. having used practically every sharpening medium available and been disappointed with either the cost, speed of cutting, mess, need to maintain and flatten them as well as the need to buy multiple stones, i set out to make a system that addressed all frustrations of the above to create a single sharpening system unit that has the ability to use any grit at an extremely affordable price without the need for jigs or clamps, be able to sharpen practically every tool you own, never need to be maintained or flattened, one that cuts extremely quickly, produces no mess and that is user friendly. i made and tested my float glass sharpening system for over a year and it has become my go to every single time. i haven’t used any other medium since. if you strop your tools frequently, you rarely have to sharpen, but when you do you’ll be glad to own one and avoid the frustrations i and so many others have experienced!
the final grind is a combination of the two above. the advantage of this grind is the speed in which you can sharpen it. by first grinding the hollow and then following up with the flat you only need to remove tiny amounts of steel to produce a burr.