Each machining center spindle NTE rebuilds & repairs is disassembled
and checked thoroughly before quoting. We also discuss, whenever
possible, the application and environment the spindle is used in.
Gathering this information allows us to cater the repair to our customer's
individual circumstances.
Each of the following is inspected before quoting:
Taper / tooling interface: Poor tooling contact
from wear and damage is one of the major causes of poor part quality
and reduced tool life. NTE inspects percentage of contact, run out,
and gauge line. If any of these fall outside acceptable specifications
the part is sent to our grinding department for repair evaluation.
Drawbar Force: Tool retention is one of the most
important actions in a maching center spindle and one of the most
overlooked. Poor tool retention is a common cause of taper and tooling
damage. It is NTE’s standard procedure to replace disc/Bellville
springs whenever possible. Every spindle is checked with the customer’s
retention knob for proper retention force before shipment.
Contamination: One of the leading causes of bearing failure!
When contamination is present during the initial inspection, our
technicians determine where it entered the spindle and recommend
possible steps for preventing future contamination.
Bearings: NTE uses only the highest quality bearings in our repairs.
After discussing the application with you we will use the best
bearings for your individual circumstances. In many cases the machine
OEM produces the spindle for a wide spectrum of uses. Depending
on speed, axial load, radial load and finish requirements, we will
design the repair to fit your specific requirements
Dimensional check: All critical areas of the shaft, housing,
spacers and shoulders are checked for size and run out.
Electrical: Whenever possible all sensors and drive components
are checked electrically for defects.
After these checks are made repair recommendations are estimated
and described in the quote to our customers. NTE will contact you
to explain our findings and review the repair procedure.
