Specifications - JUKI MF-7900 Series Engineer's Manual

1. Specifications

No. Item
1 Model name
2 Model
3 Stitch type
4 Example of
application
5 Sewing speed Max. 6,500 sti/min
(at the time of intermittent operation)
V-belt type
Max. 6,000 sti/min
(at the time of intermittent operation)
Direct-drive type
Speed of stitch at the delivery:
4,500 sti/min
(at the time of intermittent operation)
6 Needle gauge
7 Differential feed
ratio
8 Stitch length
9 Needle
10 Needle bar
stroke
11 Dimensions
12 Weight
13 Lift of presser 8 mm (needle gauge : 5.6 mm without top covering), and 5 mm (with top covering)
foot
14 Feed adjust- Main feed ............. dial type stitch pitch adjustment method
ment method Differential feed ... lever adjustment method (micro-adjustment mechanism is provided.)
15 Looper mecha-
nism
16 Lubricating sys-
tem
17 Lubricating oil
18 Oil reservoir
capacity
19 Installation
20 Noise - Equivalent continuous emission sound
pressure level (L
A-weighted value of 79.5 dB; (Includes
K
C.6.2 -ISO 11204 GR2 at 4,500 sti/min.
High-speed, Cylinder-bed
Top and Bottom Coverstitch Machine
MF-7900 series
ISO standard 406, 407, 602, and 605
Hemming and covering for knits and general knitted fabrics
3-needle ..... 5.6 mm and 6.4 mm
2-needle ..... 3.2 mm, 4.0 mm and 4.8 mm
1 : 0.9 to 1 : 1.8 (stitch length : less than 2.5 mm)
(1 : 0.6 to 1 : 1.1, when the differential link hinge screw is changed)
Micro-differential feed adjustment mechanism is provided. (Micro-adjustment)
0.9 mm to 3.6 mm (can be adjusted up to 4.5 mm)
UY128GAS #9S to #12S (standard #10S)
(Equivalent to Nm65 to Nm80, standard Nm70)
31 mm (33 mm when the eccentric pin is changed over)
(Height) 450 mm x (Width) 468 mm x (Length) 264 mm
Micro-lifter mechanism is provided.
Forced lubrication method by gear pump
JUKI CORPORATION GENUINE OIL 18 (Equivalent to ISO VG18)
Oil gauge lower line : 600 cc to upper line : 900 cc
Table-mount type, Semi-submerged type
) at the workstation :
pA
= 2.5 dB); according to ISO 10821-
pA
Application
High-speed, Semi-dry-head, Cylinder-bed
Top and Bottom Coverstitch Machine
Max. 5,000 sti/min
(at the time of intermittent operation)
V-belt type
Max. 5,000 sti/min
(at the time of intermittent operation)
Direct-drive type
Speed of stitch at the delivery:
4,000 sti/min
(at the time of intermittent operation)
42 kg
Spherical rod drive method
- Equivalent continuous emission sound
pressure level (L
A-weighted value of 76.5 dB; (Includes
K = 2.5 dB); according to ISO 10821-
pA
C.6.2 -ISO 11204 GR2 at 4,000 sti/min.
– 1 –
MF-7900D series
) at the workstation :
pA