JUKI DDL-5550N Handbook page 82

High-speed, Flat-bed, Top and Bottom Coverstitch Machine
with Pneumatic Top and Bottom Thread Trimming Device
MF-7723/UT33
(3-needle, top and bottom coverstitch machine)
● The quality-first flat-bed coverstitch machine now comes with a
pneumatic top and bottom thread trimmer.
dramatically improved thread trimming performance and
reliability to achieve consistent thread trimming, thereby
contributing to increased productivity.
SPECIFICATIONS
Model name
Stitch type
Needle
Stitch pitch adjustment
Differential feed adjustment
Lubrication
Lubricating oil
Top and bottom thread trimmer
Auto-lifter
Micro-lifter
Needle bar stroke converting function
Silicon oil tank for needle tip and
needle thread
Cartridge oil filter
Compressed air
Air consumption
Weight of the machine head
The needle bar stroke has been factory-set to 31mm as standard. 33mm for thicker material also be available by simple adjustment. (max. sewing speed: 5,500rpm)
SUBCLASS MACHINE LIST
Subclass machines
Seams
U10
Basic stitch (universal type)
1 Stitch length can be adjusted to 4.4mm at the maximum.
It offers
MF-7723 / UT33
3-needle top and bottom coverstitch
UY128GAS #9S #14S (standard #10S)
By micro-adjustment mechanism
Automatic
JUKI Machine Oil 18 (equivalent to ISO VG18)
Provided as standard (pneumatic type)
Provided as standard (pneumatic type)
Provided as standard
Provided as standard
Provided as standard
Provided as standard
0.5MPa (5kgf/G)
0.7N R/min,
182N R/min (when the air-blow type wiper is used)
Model No. Number of Number of
needles threads
MF-7723-U10-B56 3
By dial
49kg
1
Needle gauge Stitch Differential-
(mm) length (mm) feed ratio
5 5.6 1.2 3.6 1:0.7 1:2
2 5mm with top coverstitch, 8mm without top coverstitch.
MF-7723U10B56/UT33
Pneumatic top and bottom Pneumatic top and bottom
thread trimming mechanism thread trimming mechanism
Part No.134-42058
By using an air-blow nozzle
included in the accessary box
needle threads are blown at
the end of bottom coverstitch.
Device
2
Presser lifting Max. sewing
amount (mm) speed (rpm)
5(8) 6,500 UT33
MF-7723/UT33 (August, 2004) 1/2
5