Benefits shown using grinding mandrels
For you, using solid hard metal mandrels means lower unit costs and higher quality. Or: you earn more money, even though they cost more than steel mandrels. Solid hard metal is stiffer, more vibration-damping and has less thermal expansion than steel. You therefore benefit from:
Economy
For internal cylindrical grinding, today’s most powerful abrasives (e.g. Vit-CBN, ceramic-bonded cubic boron nitride or sintered corundum) require a higher grinding pressure than earlier abrasives (e.g. white corundum or SiC grinding wheels). This is the only way to provoke the desired self-sharpening effect. The abrasive develops its full potential and therefore achieves optimum economic results.
Longer service life
The vibration-damping properties of hard metal mandrels (higher modulus of elasticity, higher density, sintered/porous structure) reduce vibrations and contribute to a longer tool life.
Better surface quality
You achieve a better and more homogeneous grinding pattern despite the larger rotating mass. This is achieved with the same abrasive and parameters.
Dimensional accuracy
The low thermal linear expansion of hard metal is a major advantage. Thermal linear expansion is particularly important when shoulders, recesses or grooves are ground.
Low deflection
Expensive machine options (e.g. spindle deflection compensation) can be minimised or eliminated. The low deflection or smaller deviation supports the required geometric quality, especially when grinding small and deep bores.
