www.shopmetaltech.com August 2017
26 | MACHINING | Grinding
changed course and turned to the oil and gas industry. When that
industry experienced one of the worst downturns in recent history in
2014-2015, MTM did what it does best: it changed course. It landed a
multi-year purchase order with a major auto parts supplier to produce
the main and input shafts for the electric motor of GM’s electric
vehicle, the Volt and purchased a Studer S33CNC OD cylindrical
grinder from distributor Machine Tool Systems to support the new
work. That was in 2015.
Today, MTM produces approximately 5,000
shafts annually on the Studer and keeps the
cylindrical grinder busy with other work from
customers in the automotive, oil and gas, mining
and nuclear industries.
The 1,525 sq m ( 16,400 sq ft) machine shop
is also home to multiple CNC machine tools
including five axis, mill-turn, vertical lathes and
machining centres from Nakamura-Tome, DMG
MORI, Mazak, O-M Ltd. and Haas.
Machining the tough stuff
Munjic doesn’t hesitate when asked how the
company landed the job for the complex
machining of the Volt’s main and input shafts.
“We know we are definitely the best for this
kind of machining in this area. The main shaft is
the most critical component of the Volt’s electric
motor. But it’s not just machining the shafts for
the Volt. A customer came to us for component
prototyping and we used the Studer to create the
prototypes. These were very tight tolerance parts
for four different prototype parts.”
The automotive parts supplier visited MTM to
see the prototype parts being machined on the
the studer s33 cnc cylindrical grinder is equipped with a fixed
wheelhead with two motor spindles for external grinding and an
internal grinding attachment.