Operation Manual

– 12 –
23.
MOTOR PULLEYS AND BELTS
1) A clutch motor with 400W output (1/2 HP) is used as the standard motor.
2) An M-type V belt should be used.
3) The relationship between the motor pulleys, belt lengths and sewing speeds is shown in the following table :
＊
The effective diameter of a motor pulley is equivalent to the outside diameter minus 5 mm.
＊
The motor should rotate counterclockwise as observed from the handwheel side. Be careful not to allow
the motor to rotate in the reverse direction.
Motor pulley O.D.
(mm)
125
120
115
110
105
100
95
90
85
80
75
70
Sewing speed (rpm)
Motor pulley part No.
MTKP0120000
MTKP0115000
MTKP0110000
MTKP0105000
MTKP0100000
MTKP0095000
MTKP0090000
MTKP0085000
MTKP0080000
MTKP0075000
MTKP0070000
MTKP0065000
50 Hz
5,060
4,850
4,630
4,440
4,250
4,000
3,820
3,610
3,390
3,160
2,950
2,740
60 Hz
5,040
4,780
4,540
4,320
4,000
3,790
3,520
3,260
Belt part No.
MTJVM004400
MTJVM004300
MTJVM004200
MTJVM004100
Belt length
1118 mm (44")
1092 mm (43")
1067 mm (42")
1041 mm (41")