ULTRA-PRECISION HIGH-TORQUE AIR GRINDER
ROTUS Interchangeability with a variety of attachments
ideal for any applications.
A Special Rotary Vane
Air Motor is Incorporated
The air motor is utilizes a special vane
design which keeps constant speed even
under load providing stable grinding and
polishing operation.
Twist Free Hose
To prevent twisting of the hose, 360˚ Twist- Free
Joint connects the motor and the hose.
17 Types of Attachments for
All Types of Applications
Capable of infinite applications with 14 different
handpieces and 3 types of intermediate
attachments. ROTUS Series Features
To achieve high torque, ROTUS air motor is assembled with micron precision between
the vanes and the internal surface of the cylinder using NAKANISHI's proprietary techniques.
ROTUS IM-301 Performance Curve
Air Pressure 0.5MPa
Speed-Output Characteristics (IM-301)
This high performance air motor with minimal power loss from load fluctuation has
excellent performance in its grinding stability. Moreover, the motor with minimal air
consumption runs quietly and the energy-saving mechanism makes it possible to operate
with a 0.75KW (1 hp) air compressor.
Speed-Output Characteristics (IM-301+RG-01)
Air cooling system generates no heat for continuous operation.
By attaching the silencer to the end of the exhaust air tubing, the motor is operated
extremely quiet.
Twist-Free Joint mechanism is installed in IM-301 to solve the problem of hose twisting.
Output Power (W)
10 9
8 7
6 50
4 40
3 30
2 20
1 Torque (cN·m)
60 5
17 types of attachments for all types of applications.
* Foot controller is available : used as an ON/OFF switch as well as a variable speed control.
Speed-Torque Characteristics (IM-301+RG-01)
11 Lightweight and compact design. 130 g (w/o hose)
ON/OFF, FWD./REV. Rotation Direction and Motor Speed can be controlled only by the
Ring Switch.
Speed-Torque Characteristics (IM-301)
12 10
0 5
10 15
20 25
30 Speed ( x 10 3 min -1 )
Specifications Speed
: Max. 30,000min -1 (0.4MPa)
Proper Air Pressure : 0.3~0.45MPa
Air Consumption : 75NL/ min
Max. Torque
: 6.6 cN • m (0.4MPa)
Output Power
: 46W
