The high accuracy that Japanese essence is versed in development went machine tool main shaft to use stops pushball bearing. This bearing uses ball of faster than metallic ball tigidity pottery and porcelain. The precision that raising a ball while, the precision that still raised inner ring and outer lane groove and maintain implement dimension precision, NRRO (Non Repeatable Run-Out, asynchronous brace up place precision) reduced the 1/2 previously. The high accuracy that passes bearing is changed, can raise the precision of main shaft roll of the machine tool, return the quality that can improve accurate component surface and mould cutting range. New product plans to appeared on the market in April 2007. To raise the rotational precision of bearing, japanese energy industry is in above all maintain implement on used tall rigid project plastic. Come so, not only dimension precision gets rising, and be out of shape from what mental efforts brings about when roll also be able to reduce, maintain implement with the guiding of outer lane clearance also reduced an in part. In addition, still raised the pellet of the circularity of inner ring and outer lane groove and ball to spend. In the test that has in this company, when axial diameter is 8000rpm for 50 millimeter, rotate speed, the RRO of bearing (synchronous brace up place precision) for 0. 8 micron, NRRO is 0.
07 micron, the RRO of machine tool main shaft was achieved 1.
1 micron, NRRO was achieved 0.
15 micron. Bearing was used need not clean bearing and need not add those who pour lubricating oil to pack way, the material that pack was used can have resource reborn stuff. Additional, regard environmental protection as countermeasure, reduced attrition loss 30% ～ 50% . Still do not use the material of harmful environment additionally. CNC Milling
CNC Machining