JUCRANK

Crankshaft grinding made easy

Oscillating grinding  for all crankshafts. With its JUCRANK pin chasing grinding machines, JUNKER offers a multi-purpose solution for the complete machining of crankshafts. The range covers all crankshaft types, from single-cylinder to twelve-cylinder. Depending on the processing type and requested release volume platforms and grinding spindle head versions are individually configured and installed for the various JUCRANK types.

Pre- and finish grinding in one clamping

JUCRANK CBN pin chasing grinding machines solve practically every grinding task in crankshaft machining. Main bearings (cylindrical, convave, convex) and pin bearings (cylindrical, spherical, concave and convex) can be ground in a single clamping. Hardened radii can also be ground. JUNKER also offers practically every combination with other types of grinding. Depending on the machine type combination, locking collars, flanges and pivots can be machined using other JUNKER grinders.

Benefits

Flexible applications for various numbers of cylinders with CNC program conversion
Oscillating grinding principle creates extra flexibility when grinding main and pin bearings
High utilisation ratio with CBN and oil
Dressing device and dressing process in line with requirements
High dimensional accuracy with in-process measurement
High accuracy thanks to  one-time clamping

Measurements can be taken and roundness and dimensions can be corrected during machining
Thanks to the principle of grinding of the main and pin bearings in one clamping, the deviation is theoretically zero.
"Sensitive" workpieces supported on the main bearing with self-centring three-point steady
CNC-controlled coolant feed guarantees permanent alignment with the grinding zone
High long-term precision with hydrostatic circular guides (guide along X-axis, feed-in spindle, axial bearing)