The Conair SC-5 Sure Cut Series rotary knife cutter has been
designed to be “The most versatile cutter of the industry”.
With both capacity to cut small parts at high speeds or large
tubes or profiles at low speeds this cutter can eliminate the
need for moving cutters in and out of a line per application.
Today with custom profile houses potentially running 2-3 dif-
ferent profiles on one line in a given day, time is at a premi-
um. Having to move different cutters in and out of line is no
longer acceptable when time is money.
Mechanical Features
This series of servo rotary knife cutters use a 24 inch diameter
flywheel optimizing surface speed and power. This is in fact
the largest diameter wheel which could be used while still
allowing it’s mounting under the bushing holder.
Flywheel
With a 24 inch diameter flywheel which is 1inch thick, many
benefits become available.
Planetary Gear Reducer
A 10:1 in-line servo motor rated planetary gear reducer with 7
arc-minutes maximum backlash is mounted directly to a 3000
rpm brushless servomotor. A top flywheel speed of 300 rpm is
realized. Even though the flywheel appears to be moving
slowly, the actual surface speed at the blade at only 300
RPM’s is over 0.438 inch per millisecond. That’s twice the
surface speed of a typical clutch brake cutter.
Instead of mounting the cutter head directly to the servo motor
shaft, which is generally not designed for high radial load or
axial load due to small shaft diameters, the 24 inch flywheel is
mounted to the planetary gear reducer shaft which is designed
for just this type of application. At the gear ratio and output
speeds which this cutter was designed, radial load on the out-
put shaft of the reducer is in excess of 1000 lbs where the
servo motor shaft may only be 100 lbs or less. Potential wear
on the servo motor shaft bearings is minimized.
The high speed\low torque power of the servo motor is effi-
ciently converted into a low RPM\high surface speed\high
torque power more suitable for cutting applications.
W
HAT IS THE
SC-5 S
URE
C
UT
?
SC-5 SURE CUT Servo Knife Cutter
UGE059/1003
2-2
D
ESCRIPTION
Continued
