Abrasive Mounted Points,Shanked Stones

GRAIN

Shaft stones: Pink Corundum
Hardness: P
Structure: 5
Bonding: V

The shanks: for mounted points with diameter < 10 mm: shank diameter. 3 mm – length 37 mm.
For mounted points with diameter > 10 mm: shank diameter 6 mm – length 40 mm

(Mounted points with diameter from 3 mm to 10 mm included, also available with shank diameter 6 mm length 40 mm)

Technical specifications for shanked stones

Abrasive

AR – Pink Corundum Universal use on all kinds of steel, cast iron, soft iron, etc.

AB – White Corundum
Sharpening and finishing tempered steel

A – Grey Corundum
Roughing out of ferrous metals

ABR – Brick-coloured white Corundum
Roughing out and finishing of stainless steel

ABZ – Blue-coloured white Corundum
Sharpening and finishing tempered steel

ARR – Ruby Corundum
Useful for high – precision work

WC – Green Silicon Carbide
For working marble, granite, hard metal tools, glass and crystals

C – Black Silicon Carbide
For working marble, granite, hard metal tools, glass and crystal.
Max gr. 60

A/AR – Grey – pink Corundum
Particularly useful for snagging cast iron

A/AB – Grey/White- Bakelite Corundum
Used a lot for stainless steel, produces good finishes on all kinds of steel.
Only gr. 24 – Max 36

The size of the grain is equivalent to the number of grains per square inch. The size of the grain is expressed in increasing numbers, from the coarsest to the finest.

Grain Coarse: 16 – 20 – 24 – 36
Medium Grain: 46 – 60
Fine Grain: 80 – 100 – 120

Hardness is the measure of the bonding force, which holds the grain to the basic structure of the stone. It is expressed by letters, which go in alphabetical order from very soft to very hard.

Soft: J – K
Medium: L – M – N – O
Hard: P – Q – R
Very Hard: S – T – U

The porosity of an abrasive stone is given by the ratio between the volume of the pores and the volume of the grain and the bonding.
Standard porosity: 5 (medium)

The bonding is the material that holds the abrasive grain to the stone.:
V= Vitrified
B= Resinoid