carbide claw chisel

For marble and hard limestone. With hammerhead. Length 210 mm.

Unlike many other carbide claw chisels, the teeth of KAPRA claw chisels are ground into a continuous carbide plate. This has the advantage that the teeth are particularly sharp. They allow crystalline stone and limestone to break off easily and enable a precise strike. At the same time, the chisels require careful handling: If carbide chisels are ground very sharp or thin, careful working is required as carbide is a brittle material due to its hardness and can easily break when ground thin.

Please observe the special instructions for using KAPRA carbide claw chisels:

KAPRA carbide pointed chisels are very suitable for smoothing stone surfaces previously worked on with a point chisel. The claw chisels should be loaded evenly over the entire "row of teeth" and not used on one side, otherwise they can tilt and break. Levering movements when striking can also lead to breakage. KAPRA carbide toothed chisels are not suitable for working with a heavy mason's hammer or for blasting or rough removal of stone! The actual shape of the stone should first be worked out with the point chisel.

General information on carbide chisels:

Sculpting chisels made of carbide or with carbide inserts are particularly suitable for working hard types of stone. Carbide tools need to be resharpened less frequently during work, as the material is so strong that there is less abrasion than with tools made of forged steel. The carbide cutting edge therefore has a longer service life.

The rule of thumb for hard stone is: the harder the stone, the blunter the cutting angle of the chisel should be. With hard stone such as granite, the chisel is positioned at almost a right angle and the stone is virtually pulverised. The chisel therefore has a very blunt cutting edge. For crystalline stone such as hard marble, a more pointed tool with a sharper cutting edge is required. The chisel is set flat so that the stone can chip off without damaging the underlying crystalline structure.

Carbide chisels can also be used for working sandstone. As sandstone is highly abrasive, forged steel chisels can wear relatively quickly. Carbide cutting edges have a longer service life due to their hardness. However, it should be noted that the carbide pins are usually set in steel.

As with crystalline rock, pointed chisels tend to be used for working sandstone: The aim with this type of rock is to destroy the bond between the sand particles when striking, for which a pointed tool is better suited than a blunt one. However, the same applies here: for very hard sandstone, use less pointed chisels that are less likely to break.

KAPRA carbide chisels are manufactured by BAVARIA Steinmetzwerkzeuge according to the requirements of bildhau. You can find out more about the special features, production and quality of BAVARIA carbide tools in an interview with Andreas Weber, owner of BAVARIA Steinmetzwerkzeuge.