Machine specifications
A
- 4 7
Rotary hook Standard hook Large hook
B
- 2 5
Stitch function Fixed needle bar Split needle bar
C
- 1 2
Thread trimmer － ○
D
- 4 T
Quick reverse ○ ○
Thread wiper ○ －
E
- 0 3
Lubrication type Minimum lubrication Semi dry
F
- F 3 5 7
Use Foundation
Light-weight and
medium-weight
materials
Heavy-weight
materials
Heavy-weight
materials (For
extra thick thread)
T-8421D
- -T3F -T0F -T03
Max. sewing speed 3,000 sti/min 4,000 sti/min 4,000 sti/min
Start backtacking and
continuous backtacking speed
250 to 1,800 sti/min
End backtacking speed 1,000 sti/min
Max. stitch length 4mm
Presser foot
height
Lifting lever 7mm
Knee lifter 13mm
Feed dog height 1mm
Needle (DP×5) #9 to #14 #11 to #16
Motor AC servo motor (4-pole, 550W)
Power supply Single-phase 200V-230V, 3-phase 200V-230V, Power consumption 500 VA
Control circuit Microprocessor
viii
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