JUKI TNU-243 - Safety Precautions; General Safety Guidelines; Operations Requiring Power Off

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SAFETY PRECAUTIONS
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22. MOTOR PULLEY AND SEWING SPEED
Model
Number of
revolution of
sewing machine
Effective
diameter of
handwheel
Number of
poles of motor
Frequency.
Number of
revolution of
motor
Effective
diameter of
motor pulley
TNU-243
600 sti/min
φ 154 4
50Hz 1,430 rpm φ 65
60Hz 1,715 rpm φ 50
800 sti/min
50Hz 1,430 rpm φ 85
60Hz 1,715 rpm φ

70
Use an M type V-belt.
The relation among the motor pulley, the sewing speed of sewing machine is as shown in the table below:
23. PROBLEMS WITH SEWING AND CORRECTIVE MEASURES
(Caution) The effective diameter of motor pulley is obtained by subtracting 5 mm from its outside diameter.