Accura Technics Inc. (USA, privately held)[website]
announced it has shipped a bearing grinder repeating 0.15 micron roundness.
The company's 1210G multi-surface grinder is being used to finish spindle components for camshaft
and crankshaft roundness measuring equipment.
Roundness in pre-delivery tests achieved 0.15 micron for a ball bearing inner race, and 0.25 micron
for a ball bearing outer race.
Accura 1210G with autoloader
The grinder X-axis has a hydrostatic bearing workhead driven by a linear motor. The other two axes
are an air bearing ID/OD spindle wheelhead and a ball bearing rotary surface spindle wheelhead.
The wheelheads are independently CNC controlled, using servomotor ball screws.
The entire assembly is mounted on a thermally stable natural granite base.
The grinder allows workpieces up to 250mm tall, offers a 300mm swing, and 350mm X-axis travel. A
variety of options are available such as autoloaders and gauging.
printer-friendly version
- by Bruce A. Carr
from individual research, tips and commercial sources.
Unauthorized reproduction is prohibited.
eBearing.com ... for everything that moves™
Entire contents Copyright 1999-2008, eBearing Inc. All rights reserved.
eBearing.com and "... for everything that moves" are registered
trademarks of eBearing Inc.
printer-friendly version