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When the center hole (center hole) is positioned for cylindrical grinding, the quality of the center hole (center hole) of the workpiece is crucial, because it determines the geometric accuracy of the grinding surface. After heat treatment, the central hole (center hole) of the workpiece is often damaged to varying degrees, so it needs to be repaired by grinding. The center hole (center hole) should be ground to high precision as far as possible. This is the central idea of FISCHER grinding machine design.
FISCHER center hole (top hole) grinder is the result of our efforts in this field for many years. It can meet the needs in precision, efficiency and automation. FISCHER center hole (center hole) grinder can ensure that any center hole through (center hole) can effectively obtain precision grinding quality.
What is center hole grinding
Center hole grinding is the optimal and essential preparation of a component in order to achieve the final, high-precision grinding after hardening.
A center hole grinding machine offers decisive advantages for the further processing of workpieces, such as cylindrical-, gear- or thread grinding. Center hole grinding restores the shape and position of deformed center bores after heat treatment. A cross-grinding pattern is also created, which retains the oil between the fixed centers during cylindrical grinding. A concentricity of up to 0.001 mm in the center hole can be achieved.
Why center hole grinding
✓ Restore the axis of deformed workpieces ✓ Establish coaxiality, for example between a finished bearing seat and the center hole
✓ Minimisation of the cylindrical grinding time thanks to smaller grinding allowance
✓ Achieve higher efficiency, greater accuracy and lower reject rate during following processes
✓ Increase process reliability and capability for series production
✓ Intentional displacement of the axis (if required by the workpiece)
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