Juki MF-7923 - 3 Needle High Speed Free-Arm Top and Bottom Coverstitch, Cylinder Bed Industrial Machine
Includes Fully Assembled Table and Servo Motor - Used to be MF-7823
The machine performs sewing that matches a broader range of sewing items.
The machine can be used for the hemming process of the sleeves and bottoms of T-shirts and for the covering process for sportswear and knitwear. It is not a specific-purpose model, but a basic one which can be used for a broader range of processes independently.
Fully Assembled Table & Servo Motor
The motor can be upgraded to an adjustable-speed servo motor for only $79. Simply choose the servo motor upgrade option from the drop down menu during checkout.
Table and Motor may differ from the image shown.
No Looper Thread Twining
The newly-developed metal cover for the looper thread cam unit also covers the rotating part of the looper thread cam shaft, thereby preventing the looper thread from twining around the looper thread cam shaft. Even if the looper thread twines around the bushing cover, the newly-installed thread cutter cuts the thread to prevent a long piece of looper thread from twining around the cover.
Needle Bar Stroke Conversion Mechanism
By changing over the needle bar stroke, penetrating force of the needle as well as thread tension to fit heavy-weight materials (fleece, blankets) can be obtained. The needle bar stroke can be changed by adjusting the eccentric pin. (Changing of parts is not required. Factory-set at the time of delivery: 31mm; for sewing heavy-weight materials: 33mm)
Elastic material or delicate material can be sewn with the presser foot kept slightly raised. This effectively helps reduce the degree of slippage, warpage and damage of the material.
Stitch Type Change Over
It is now possible to change over the stitch type, such as elastic soft-seams for inner wear and high-quality well-tensed seams for outer wear. The stitch type can be changed over (soft-seams/well-tensed seams) simply by changing the thread path.
Differential-feed Micro-adjustment Mechanism
It is possible to finely adjust the differential feed amount to a best-suited value for the material to be used. The differential feed ratio is constant even if the stitch length is changed
|Max. Sewing Speed
||UY128GAS #9S~#12S (standard #10S)
|Lift of the Presser Foot
||5mm (with top and bottom covering stitch), 8mm (with bottom covering stitch)
||JUKI Machine Oil No.18 (equivalent to ISO VG18)
|Weight of the machine head
Clutch motors operate at a fixed speed, typically between 1725 - 3450 rpm, depending on the type of machine. Servo Motors on the other hand are speed adjustable. The two major advantages of the Servo Motor are that you can control the speed of the motor and that the motor is completely silent when the pedal is not engaged.
Some other advantages of the Servo Motor include:
- They consume up to 90% less energy than clutch motors
- 1/3 lighter than clutch motors
- Reverse motor rotation with the flick of a switch
- Nothing to wear or adjust
- Adjusted speed remains the same no matter how hard the pedal is pressed
Most of our customers find that the sewing machine is much easier to control with a Servo motor because of the speed control. This is especially helpful for beginner sewers but also for projects that simply don't require high speed stitching.