Comparison Ruixin RX-001 vs Ganzo GTP

- Lansky A customizable manual sharpening system developed by the company of the same name. It is based on a device in the shape of the letter “T” laid on its side, which combines a clamp for the blade to be sharpened and guides for the whetstones (touchstones). The Lansky system allows you to select the required sharpening angle - it depends on which guide hole the whetstone is inserted into; and the set itself usually comes with several whetstones (with different grain sizes). Such sharpeners are especially convenient when you have to deal with different types of tools that require different sharpening angles - for example, fillet and regular chef knives (the former are sharpened at a very sharp angle, the latter at a medium angle).

- Apex. An advanced manual sharpening system, similar in general features to Lansky (see above), but used exclusively in radius sharpeners. Apex systems are capable of working with “non-native” bars that are more or less suitable in size. In general, they are considered more professionally oriented than Lansky, since they provide more opportunities to change the sharpening angle, but are more complex in design and use. Yes, and they cost more.

The smallest grit provided in the design of the sharpener or among the complete replacement whetstones. It also indicates the standard grain size for models that have only one type of abrasive surface.

The universal unit for grit is GRIT. Simplified, GRIT grit can be described as the smallest number of holes per square inch of a sieve, at which individual abrasive grains can no longer wake up through this sieve. Accordingly, the higher the GRIT number, the finer the grain will be and the lower the granularity will be.

The purity and intensity of sharpening directly depends on this indicator. The finer the grit, the finer the finish and the lower the abrasive performance, and vice versa, coarser surfaces are well suited for initial sharpening, roughing and/or removing large amounts of material.

Here is a rough table of recommendations for optimal GRIT grit for different applications:

80 – 600 — peeling work (for example, correcting the thickness or geometry of the cutting edge or the entire blade).
600 – 3000 – preparatory work (elimination of traces of peeling), initial sharpening.
3000 – 6000 – semi-finish and fine sharpening.
More than 6000 – final finishing, polishing, straightening of the cutting edge.

At the same time, it is worth remembering that the processing features also depend on the material of the abrasive (see above). For example, ceramic surfaces with...the same grain size work more delicately and more slowly than diamond ones. More detailed recommendations on optimal grit values and the specifics of various materials can be found in special sources.

The largest grain size of the abrasive surface provided in the design of the sharpener (or among the replaceable whetstones supplied as standard).

See “Min. graininess" above. This parameter is indicated only if the sharpener has several abrasive surfaces with different grain sizes. The greater the difference between the minimum and maximum graininess, the more universal this model is, usually, the more options it offers in terms of processing intensity. On the other hand, a wide variety of abrasive surfaces has a corresponding effect on the cost.

Possibility of using a sharpener for sharpening scissors.

Technically, you can sharpen scissors on almost any sharpener — the design of their blades is not very different from knife ones. However, individual sharpeners may provide various design solutions that make it easier to work with scissors — for example, the ability to set the optimal sharpening angle or special mounts for such a tool. Therefore, for maximum convenience when working with scissors, you should still choose models where this function is directly stated.