Motor Pulley And Belt Mf-7700 Series - JUKI MF-7700 Series Engineer's Manual

4. MOTOR PULLEY AND BELT MF-7700 Series

S e w i n g
speed (rpm)
Pulley size (mm)
4,500 ø 100
4,800 ø 105
5,000 ø 115
5,500 ø 125
5,800 ø 130
6,000 ø 135
6,200 ø 140
6,500 ø 150
1 . The table shows the numbers when a 3-phase 2-pole 400 W clutch motor (1 / 2 HP) is used.
2 . The commercially-available motor pulley near to the counted value is designated since the outside diameter of the
commercially-available motor pulley counts by 5 mm.
3 . When you use a new sewing machine, use the machine at a speed of 5,000 rpm or less for the first 200 hours
(approximately one month). A good result can be obtained in terms of the durability.
(Caution) 1. Use a motor pulley which is adaptable to this sewing machine.
2. The sewing speed exceeds the max. sewing speed of this sewing machine and machine trouble will be
caused unless a motor pulley which is adaptable to this sewing machine is used.
50Hz
Belt size (inch) Pulley size (mm)
M-35 ø 85
M-36 ø 90
M-36 ø 95
M-37 ø 105
M-37 ø 110
M-37 ø 115
M-38 ø 120
M-39 ø 125
60Hz
Belt size (inch)
M-35
M-35
M-35
M-36
M-36
M-37
M-38
M-38
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