Motor And Belt - JUKI MF-7000 Series Engineer's Manual

2. MOTOR AND BELT

MF-7000 Series
Sewing speed
Motor pulley
(r.p.m.)
Outer dia. (mm)
6500
6000
5500
5000
4500
4000
3500
1) Use a clutch motor of 1/2 HP (400W).
2) Use an M type V belt.
3) The table above shows the sewing speed obtained by the use of motor pulleys with different diameters
and V belts with different lengths.
4) Note that the effective diameter of the pulley of the machine head is 49 mm.
MFC-7000 Series
Sewing speed
Motor pulley
(r.p.m.)
Outer dia. (mm)
6500
6000
5500
5000
4500
4000
3500
1) Use a clutch motor of 1/2 HP (400W).
2) Use an M type V belt.
3) The table above shows the sewing speed obtained by the use of motor pulleys with different diameters
and V belts with different lengths.
4) Note that the effective diameter of the pulley of the machine head is 57.5 mm.
50 Hz
V belt (inch)
Fully-submerged Semi-submerged
type
140 35
125 35
110 35
100 34
90 34
80 34
70 34
50 Hz
V belt (inch)
Top mount type Semi-submerged
145 43
135 43
120 41
110 41
95 41
85 39
75 39
−
Motor pulley
Outer dia. (mm)
type
120
105
90
85
75
70
60
Motor pulley
Outer dia. (mm)
type
40 120
40 110
38 100
38 90
38 80
37 70
37 60
2
−
60Hz
V belt (inch)
Fully-submerged Semi-submerged
type type
35
35
34
34
34
34
33
60Hz
V belt (inch)
Top mount type Semi-submerged
type
41 38
41 38
41 38
39 37
39 37
39 37
38 35