Jack JK-20U (53Z / 63Z / 93Z) Parts Book (PDF)
Text index — Jack JK-20U (53Z / 63Z / 93Z)
Page 22 — IX. COMPONENT EXAMPLE
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T1-0 | Housing | 1 |
| 2 | U43T1-13 | Model-plate | 1 |
| 3 | U43T1-17 | Model-plate river | 2 |
| 4 | U43T1-18 | Model-plate | |
| 5 | U43T1-21 | Face plate | 1 |
| 6 | U43T1-2-3 | Face plate thread guide | 1 |
| 7 | U43T1-22 | Thread-hold fixing screw | 1 |
| 8 | U43T1-2-3 | thread guide nut | 2 |
| 9 | U43T1-3 | Face Plate screw | 2 |
| 10 | U43T1-4 | Linear lock eccentric screw | 1 |
| 11 | U43T1-5 | Linear lock eccentric | 1 |
| 12 | U43T1-6-1 | Thrust plate | 1 |
| 13 | U43T1-6-2 | Thrust plate spring | 1 |
| 14 | U43T1-6-3 | Thrust plate spring screw | 2 |
| 15 | U43T1-7 | Needle plate | 1 |
| 16 | U43T1-8 | Needle plate screw | 2 |
| 17 | U43T1-9-1 | Inner cover plate | 1 |
| 18 | U43T1-9-2 | Cover plate spring | 1 |
| 19 | U43T1-9-3 | Cover plate spring Screw | 2 |
| 20 | U43T1-10 | Thread take up lever shield | 1 |
| 21 | U43T1-11 | Shield screw | 1 |
| 22 | U43T1-12 | Washer | 1 |
| 23 | U43T1-13 | Rotating hook shield | 1 |
| 24 | U43T1-14 | Rotating hook shield screw | 1 |
| 25 | U43T1-15 | Thread-releasing lever | 1 |
| 26 | U43T1-16 | Thread-releasing lever spring | 1 |
| 27 | U43T1-17 | Thread-releasing lever screw | 1 |
| 28 | U43T1-18 | Lower thread-running pin | 1 |
| 29 | U43T1-19 | Double thread-running rack | 1 |
| 30 | U43T1-20 | Thread-running rack screw | 1 |
| 31 | U43T1-21 | Thread-releasing pin | 1 |
| 32 | U43T1-22 | Thread-hold fixing screw | 1 |
| 33 | U43T1-19a | Thread-running rack | 1 |
| 34 | U43T1-23-1 | Thread Tension regulator bushing | 1 |
| 35 | U43T1-23-2 | Fixing screw | 1 |
| 36 | U43T1-23-3 | Thread take-up sping | 1 |
| 37 | U43T1-23-4 | Thread tension stud | 1 |
| 38 | U43T1-23-5 | Thread tension disc | 2 |
| 39 | U43T1-23-6 | Thread tension-releasing disc | 1 |
| 40 | U43T1-23-7 | Thread tension spring | 1 |
| 41 | U43T1-23-8 | Thumb nut revolution stopper | 1 |
| 42 | U43T1-23-9 | Thumb nut | 1 |
Page 23 — 机壳部件 Components of housing
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 43 | U43T1-24 | Upper cover | 1 / |
| 44 | U43T1-25 | Upper cover back screw | 1 / 1 |
| 45 | U43T1-26 | 3-eyelet hole thread guide | 1 / 1 |
| 46 | U43T1-27 | 3-eyelet hole thread guide screw | 1 / 1 |
| 47 | U43T1-28 | Rubber plug(big) | 1 / 1 |
| 48 | U43T1-29 | Rubber plug(medinm) | 1 / 1 |
| 49 | U43T1-30 | Rubber plug(small) | 1 / 1 |
| 50 | U43T1-31 | Upper cover set screw | 2 / 2 |
| 51 | U43T1-32 | Fastening screw | 1 / 1 |
| 52 | U43T1-33-0 | Upper thread-guide component | 1 / 1 |
| 53 | U43T1-33-1 | Thread-guide | / 1 |
| 54 | U43T1-33-2 | Thread-tension stud | / 1 |
| 55 | U43T1-33-3 | Upper thread-tension disc | 2 / 2 |
| 56 | U43T1-33-4 | Upper thread-tension spring | 1 / 1 |
| 57 | U43T1-33-5 | Nut | 1 / 1 |
| 58 | U43T1-34 | Back cover | 4 / 4 |
| 59 | U43T1-35 | Back cover screw | 1 / 1 |
| 60 | U43T1-37 | locating block set screw | 1 / 1 |
| 61 | U43T1-37-1 | Locating block | 1 / 1 |
| 62 | U43T1-38 | Volume-adjusting spindle | 1 / 1 |
| 63 | U43T1-39 | Washer | 1 / 1 |
| 64 | U43T1-40 | Pressing plate screw | 1 / 1 |
| 65 | U43T1-41 | Volume-adjusting plate | 1 / 1 |
| 66 | U43T1-42 | Extension spring pin | 1 / 1 |
| 67 | U43T1-43 | Extension spring | 1 / 1 |
| 68 | U43T1-44 | Crank screw | 1 / 1 |
| 69 | U43T1-45 | Thread-winding swaying handle | 1 / 1 |
| 70 | U43T1-46 | Swaying handle presser spring | 1 / 1 |
| 71 | U43T1-47 | Axis | 1 / 1 |
| 72 | U43T1-48 | Thread-winding small wheel | 1 / 1 |
| 73 | U43T1-49 | Thread-winding rull wheel | 1 / 1 |
| 74 | U43T1-50 | Thread-winding axis spring | 1 / 1 |
| 75 | U43T1-51 | Thread-winding crank | 1 / 1 |
Page 25 — 2、挑线刺料部件 Thread take-up and needle bar components
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T2-2 | Pin screw(swaying rack of needle staff) | 1 |
| 2 | U43T2-3 | Swaying rack of needle bar | 1 |
| 3 | U43T2-4 | Eccentric pin screw of needle bar | 1 |
| 4 | U43T2-5 | Locating plate of needle bar | 1 |
| 5 | U43T2-6 | Screw of locating plate | 1 |
| 6 | U43T2-7 | Ping of swaying rack(needle bar) | 1 |
| 7 | U43T2-8 | Needle bar | 1 |
| 8 | U43T2-9 | Thread-guide of needle bar | 1 |
| 9 | U43T2-10 | Needle | 1 |
| 10 | U43T2-11 | Locking screw of needle | 1 |
| 11 | U43T2-12 | Pin-screw of connecting shaft | 1 |
| 12 | U43T2-13 | Pin-washer of connecting shaft | 1 |
| 13 | U43T2-14 | Connecting shaft | 1 |
| 14 | U43T2-15 | Pin of connecting shaft | 1 |
| 15 | U43T2-16 | Pin-locking screw of connecting shaft | 1 |
| 16 | U43T2-17 | Guide of small connecting staff | 1 |
| 17 | U43T2-18 | Screw of guide | 2 |
| 18 | U43T2-19 | Guide washer | 2 |
| 19 | U43T2-20-0 | Thread take-up lever component | 1 |
| 20 | U43T2-20-1 | Left-spiral screw | 1 |
| 21 | U43T2-20-2 | Small connecting staff | 1 |
| 22 | U43T2-20-3 | Crank of needle bar | 1 |
| 23 | U43T2-20-5 | Stitch-swaying staff | 1 |
| 24 | U43T2-20-6 | Pin of swaying staff | 1 |
| 25 | U43T2-20-7 | Pin screw of swaying staff | 1 |
| 26 | U43T2-20-8 | Screw of crank | 1 |
| 27 | U43T2-20-9 | Crank | 1 |
| 28 | U43T2-20-10 | Crank fastening screw | 1 |
| 29 | U43T2-20-11 | Thread take-up lever | 1 |
| 30 | U43T2-21 | Fastening screw(of front sleeve) | 1 |
| 31 | U43T2-22 | Front sleeve of upper shaft | 1 |
| 32 | U43T2-23 | Screw of spiral gear | 2 |
| 33 | U43T2-24 | Spiral gear of upper shaft | 1 |
| 34 | U43T2-25 | Screw of arc-cone gear | 2 |
| 35 | U43T2-26 | Arc-cone gear (upper shaft) | 1 |
| 36 | U43T2-27 | Screw of feed cam | 2 |
| 37 | U43T2-28 | Feed cam | 1 |
| 38 | U43T2-29 | Upper shaft | 1 |
Page 26 — 2、挑线刺料部件 Thread take-up and needle bar components
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 40 | U43T2-30 | Back sleeve of upper shaft | 1 |
| 41 | U43T2-31 | Fastening screw of back sleeve | 1 |
| 42 | U43T2-32 | Sleeve of balance wheel | 1 |
| 43 | U43T2-33 | Sleeve screw | 1 |
| 44 | U43T2-34 | Balance wheel | 1 |
| 45 | U43T2-35 | Clutch waher | 1 |
| 46 | U43T2-36 | Clutch screw | 1 |
| 47 | U43T2-37 | Small clutch screw | 1 |
| 48 | U43T2-39 | Swaying rack of needle bar | 1 |
| 49 | U43T2-40 | Needle har for double needle | 1 |
| 50 | U43T2-41 | Fastening screw of double needle clamper | 1 |
| 51 | U43T2-42 | Double needle clamper (2.5mm) | 1 |
| 52 | U43T2-43 | Double needle clamper (3.5mm) | 1 |
| 53 | U43T2-44 | Double needle clamper (4.5mm) | 1 |
| 54 | U43T2-45 | Fastening screw | 2 |
Page 28 — 3、送料部件 Materi-feeding components
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T3-1 | Oil felt | 1 |
| 2 | U43T3-2 | Lift feed connecting bar | 1 |
| 3 | U43T3-4 | Small come nut | 4 |
| 4 | U43T3-5 | Connecting bar of needle distance base | 1 |
| 5 | U43T3-6 | Small cone screw | 4 |
| 6 | U43T3-7 | Pointed screw | 4 |
| 7 | U43T3-8 | Pointed nut | 4 |
| 8 | U43T3-9 | Feed crank | 1 |
| 9 | U43T3-10 | Feed crank screw | 1 |
| 10 | U43T3-11 | Feed crank screw | 2 |
| 11 | U43T3-12 | Feed dog | 1 |
| 12 | U43T3-13 | Pointed screw of tooth rack | 2 |
| 13 | U43T3-14 | Point nut | 2 |
| 14 | U43T3-15 | Feed rock | 1 |
| 15 | U43T3-16 | Tooth rack | 1 |
| 16 | U43T3-17 | Feed lifting rock shatt component | 1 |
| 17 | U43T3-18 | Feed lifting rock crank screw | 1 |
| 18 | U43T3-19 | Feed lifting rock crank | 1 |
| 19 | U43T3-20 | Feed fork connecting rod | 1 |
Page 30 — 4、勾线部件 Thread-hooking Components
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T4-1 | Locating plate of rotating hook | 1 |
| 2 | U43T4-2 | Screw of locating plate | 1 |
| 3 | U43T4-3 | Bobbin case | 1 |
| 4 | U43T4-4 | Bobbin | 1 |
| 5 | U43T4-5 | Rotating hook | 1 |
| 6 | U43T4-6 | Front sleeve of rotating hook shaft | 1 |
| 7 | U43T4-7 | Front sleeve screw | 1 |
| 8 | U43T4-8 | Retainer of rotating hook shaft | 2 |
| 9 | U43T4-9 | Retainer screw | 4 |
| 10 | U43T4-10 | Back sleeve of rotating hook shaft | 1 |
| 11 | U43T4-11 | Screw of back sleeve | 1 |
| 12 | U43T4-12 | Rotating hook shaft | 1 |
| 13 | U43T4-13 | Screw of arc-cone gear | 2 |
| 14 | U43T4-14 | Arc-cone gear of rotating hool shaft | 1 |
| 15 | U43T4-15 | Arc-cone gear of lower shaft | 1 |
| 16 | U43T4-16 | Screw of Arc-cone gear | 2 |
| 17 | U43T4-17 | Screw | 2 |
| 18 | U43T4-18 | Front sleeve of lower shaft | 1 |
| 19 | U43T4-19 | Lower shaft retainer | 3 |
| 20 | U43T4-20 | Retainer screw of lower shaft | 6 |
| 21 | U43T4-21 | Back sleeve of lower shaft | 1 |
| 22 | U43T4-22 | Lower shaft | 1 |
| 23 | U43T4-23 | Screw of differential gear(lower shaft) | 2 |
| 24 | U43T4-24 | Differential gear | 1 |
| 25 | U43T4-25 | Screw of differential gear | 2 |
| 26 | U43T4-26 | Differential gear(vertical shaft) | 1 |
| 27 | U43T4-27 | Lower sleeve of vertical shaft | 1 |
| 28 | U43T4-28 | Differential shaft sliding-sleeve | 1 |
| 29 | U43T4-29 | Lower clutch sleeve | 1 |
| 30 | U43T4-30 | Screw | 2 |
| 31 | U43T4-31 | Upper sleeve of vertical shaft | 1 |
| 32 | U43T4-32 | Screw | 2 |
| 33 | U43T4-33 | Upper sleeve of vertical shaft | 1 |
| 34 | U43T4-34 | Screw of upper sleeve | 1 |
| 35 | U43T4-35 | Arc-cone gear | 1 |
| 36 | U43T4-36 | Differential connecting bar | 1 |
| 37 | U43T4-37 | Vertical shaft | 1 |
Page 32 — 5、摆针部件 Components of Swaying needle
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T5-1 | Horizontal needle fork | 1 (curved) / 1 (double) |
| 2 | U43T5-2 | Shaft of swaying needle | 1 (curved) / 1 (double) |
| 3 | U43T5-3 | Screw | 1 (curved) / 1 (double) |
| 4 | U43T5-4 | Gear of swayinn needle | 1 (curved) / 1 (double) |
| 5 | U43T5-5 | Eccentric retainer | 1 (curved) / 1 (double) |
| 6 | U43T5-6 | Connecting screw | 2 (curved) / 2 (double) |
| 7 | U43T5-7 | Eccentiric retainer | 1 (curved) / 1 (double) |
| 8 | U43T5-8 | Rack retainer | 1 (curved) / 1 (double) |
| 9 | U43T5-9 | Retainer screw | 2 (curved) / 2 (double) |
| 10 | U43T5-10 | Retainer shaft | 1 (curved) / 1 (double) |
| 11 | U43T5-11 | Connecting screw | 1 (curved) / 1 (double) |
| 12 | U43T5-12 | Differential connecting bar | 1 (curved) / 1 (double) |
| 13 | U43T5-13 | Eccentric pin of needle bar | 1 (curved) / 1 (double) |
| 14 | U43T5-14 | Sliding block of swaying needle | 1 (curved) / 1 (double) |
| 15 | U43T5-15 | Guide base of swaying needle | 1 (curved) / 1 (double) |
| 16 | U43T5-16 | Screw of guie base | 1 (curved) / 1 (double) |
| 17 | U43T5-17 | Adjustable connecting bar | 1 (curved) / 1 (double) |
| 18 | U43T5-18 | Connecting screw of differential connecting bar | 3 (curved) / 3 (double) |
| 19 | U43T5-19 | Locating block of swaying needle | 1 (curved) / 1 (double) |
| 20 | U43T5-20 | Connecting pin of guide | 2 (curved) / 2 (double) |
| 21 | U43T5-21 | Adjusting screw of locating block | 2 (curved) / 2 (double) |
| 22 | U43T5-22 | Fastening nut of locating crank | 2 (curved) / 2 (double) |
| 23 | U43T5-23 | Screw for adjusting crank sleeve | 1 (curved) / 1 (double) |
| 24 | U43T5-24 | Spring for adjusting crank | 1 (curved) / 1 (double) |
| 25 | U43T5-25 | Adjusting crank component | 1 (curved) / 1 (double) |
| 26 | U43T5-26 | Screw of spanner locating retainer | 2 (curved) / 2 (double) |
| 27 | U43T5-27 | Locating retainer of spanner | 1 (curved) / 1 (double) |
| 28 | U43T5-28 | Washer | 1 (curved) / 1 (double) |
| 29 | U43T5-29 | Spanner sleeve | 1 (curved) / 1 (double) |
| 30 | U43T5-30/31 | Spanner component | 1 (curved) / 1 (double) |
| 31 | U43T5-34 | Left locating block for stitch wide | 1 (curved) / 1 (double) |
| 32 | U43T5-35 | Right locating block for stitch wide | 1 (curved) |
| 33 | U43T5-36 | Washer of locating block | 2 (curved) / 2 (double) |
| 34 | U43T5-37 | Screw of locating block | 2 (curved) / 2 (double) |
| 35 | U43T5-38 | Locating screw | 2 (curved) / 2 (double) |
| 36 | U43T5-39 | Lcating rack for stitch wide | 2 (curved) / 2 (double) |
| 37 | U43T5-40 | Screw of locating rack | 1 (curved) / 1 (double) |
| 38 | U43T5-41 | Adjusting rack (A) for stitch wide | 1 (curved) / 1 (double) |
| 39 | U43T5-42 | Adjusting rack (B) | 1 (curved) / 1 (double) |
| 40 | U43T5-43 | Extension spring of lcoating rack | 1 (curved) / 1 (double) |
Page 33 — 5. 摆针部件 Components of Swaying needle
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 41 | U43T5-44 | Petainer of differential connecting shaft | 1 |
| 42 | U43T5-45 | Differential crank | 1 |
| 43 | U43T5-48 | Differential connecting shaft | 1 |
| 44 | U43T5-49-0 | Locating rack component | 1 |
| 45 | U43T5-50 | Set screw of locating rack sleeve | 1 |
| 46 | U43T5-51 | Screw of crank locating rack | 2 |
| 47 | U43T5-52 | Screw of extension spring | 1 |
| 48 | U43T5-53 | Connecting screw | 1 |
| 49 | U43T5-54 | Oil tray | 1 |
| 50 | U43T5-55 | Oil gauze | 1 |
| 51 | U43T5-56 | Felt of oil tray | 1 |
| 52 | U43T5-57 | Flat washer | 2 |
| 53 | U43T5-58 | Screw of oil tray | 2 |
| 54 | U43T5-59 | Elsatic washer | 2 |
| 55 | U43T5-61 | Locating rack | 1 |
| 56 | U43T5-62 | Screw | 2 |
| 57 | U43T5-63 | Handle component | 1 |
| 58 | U43T5-64 | Locating pin | 1 |
| 59 | U43T5-65 | Adjusting rack | 1 |
| 60 | U43T5-66 | Screw | 2 |
| 61 | U43T5-67 | Screw, nut | 2 |
Page 35 — 6、压脚部件 Components of presser foot
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T6-1 | Screw for pressures-adjusting | 1 |
| 2 | U43T6-2 | Pressing bar spring | 1 |
| 3 | U43T6-3 | Presser bar | 1 |
| 4 | U43T6-4 | Screw of presser foot | 1 |
| 5 | U43T6-5-0 | Presser foot component | 1 |
| 6 | U43T6-6 | Spanner pin | 1 |
| 7 | U43T6-7 | Spanner | 1 |
| 8 | U43T6-8 | Spanner pin screw | 1 |
| 9 | U43T6-9 | Presser bar bracket | 1 |
| 10 | U43T6-10 | Screw of bracket | 1 |
| 11 | U43T6-11 | Locating base | 1 |
| 12 | U43T6-12 | Screw of lever base | 2 |
| 13 | U43T6-13-0 | Component of locating base | 1 |
| 14 | U43T6-14 | Open-pin | 3 |
| 15 | U43T6-15 | Presser foot rod | 1 |
| 16 | U43T6-16 | Rod of horizontal needle | 1 |
| 17 | U43T6-17 | Presser foot lever | 1 |
| 18 | U43T6-18 | Lever screw | 1 |
Page 37 — 7、倒顺针距部件 Components of Needle Distance of Reversal Stitch
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | U43T7-1 | Feed adjusting screw | 1 |
| 2 | U43T7-2 | Pin | 1 |
| 3 | U43T7-3 | Set screw | 1 |
| 4 | U43T7-4 | Feed regulator | 1 |
| 5 | U43T7-5 | Restoring extension spring of reversal stitch | 1 |
| 6 | U43T7-6 | Screw of extension spring hook | 1 |
| 7 | U43T7-7 | Restoring extension-spring hook | 1 |
| 8 | U43T7-8 | Crank of reversal stitch | 1 |
| 9 | U43T7-10 | Crank screw | 1 |
| 10 | U43T7-11 | Spanner shaft | 1 |
| 11 | U43T7-12 | Spanner of reversal stitch | 1 |
| 12 | U43T7-13 | Spanner screw | 1 |
| 13 | U43T7-14 | Knob screw | 1 |
| 14 | U43T7-15 | Indication plate for needle distance | 1 |
| 15 | U43T7-16 | Knob | 1 |
| 16 | U43T7-17 | Locating Pin | 1 |
| 17 | U43T7-18 | Pressing spring of locating pin | 1 |
| 18 | U43T7-19 | Toothed nut | 1 |
| 19 | U43T7-20 | Screw of toobthed nut | 1 |
| 20 | U43T7-21 | Washer of Indication Plate | 1 |
Jack JK-20U (53Z / 63Z / 93Z) — parts catalog
- Page 1 (cover): This is the cover page for the JK-53Z/63Z/93Z manual and parts book, featuring an image of the sewing machine and the JACK logo.
- Page 2 (toc): This page contains the table of contents for the sewing machine manual, listing sections such as machine introduction, installation, operation, thread tension, and troubleshooting, with corresponding English translations.
- Page 3 (text): This page provides a brief introduction to the machine, detailing its capabilities and applications in various industries.
- Page 4 (text): This page contains the main technical specifications and applications for the sewing machine, detailing various stitching types, speeds, stitch lengths, presser foot heights, thread specifications, machine dimensions, and motor power.
- Page 5 (text): This page details the installation and preparation of a sewing machine, including instructions for installing the oil pan, machine head, and motor, along with operational preparations like cleaning the machine.
- Page 6 (text): This page contains installation and preparation instructions for a sewing machine, including steps for fixing the oil disk, installing the machine head, knee-control component, and motor, along with belt tension regulation.
- Page 7 (text): This page contains instructions for preparing the sewing machine for operation, including cleaning, installation, lubrication, and a test run. It also includes diagrams labeled "Figure 5".
- Page 8 (text): This page contains instructions on selecting thread, matching needles and threads to materials, and installing needles, along with a table detailing thread types and their corresponding needle sizes and suitable materials.
- Page 9 (text): This page contains instructions for winding and installing the bobbin, including adjustments for tension and alignment, and details on how to remove and install the bobbin case.
- Page 10 (text): This page contains instructions for adjusting the needle bar, stitch width, and presser foot pressure, along with diagrams illustrating these adjustments.
- Page 11 (text): This page contains instructions on how to operate the sewing machine, covering stitch selection, needle and thread coordination, needle assembly, winding thread around the shuttle core, and threading the surface and bottom stitches. It also includes a diagram labeled Figure 15.
- Page 12 (text): This page provides detailed instructions on threading the shuttle, mounting and dismounting the shuttle core, and adjusting material-feeding and needle positions for double curvea stitches.
- Page 13 (text): This page details adjustments for needle thread tension and bobbin thread tension, including illustrations showing ideal stitch formation and how to increase or decrease tension.
- Page 14 (text): This page discusses the adjustment of stitch tension and machine positioning and adjustment, including diagrams illustrating correct and incorrect stitch formations.
- Page 15 (text): This page details the regulation of horizontal stitches and the location of the rotating shuttle on an industrial sewing machine, including diagrams and step-by-step instructions.
- Page 16 (text): This page contains instructions for adjusting the needle height and mounting/dismounting the rotating shuttle of a sewing machine, referencing figures 20, 21, 22, and 23.
- Page 17 (text): This page lists common faults and their solutions for an industrial sewing machine, including issues like broken needles, skipped stitches, thread breaks, and creased material.
- Page 18 (text): This page describes different sewing methods and their associated accessories, including straight stitch, embroidery, zipper, rolled hem, overlock, and decorative stitches, with references to figures for illustration.
- Page 19 (text): This page details various sewing modes and their applications, including linear sewing, embroidery, zippered sewing, hem-wrapping, stem-wrapping, and decoration sewing, along with instructions for each mode.
- Page 20 (diagram): This page displays diagrams of various sewing machine presser feet and stitch examples, labeled as Figures 27 through 33.
- Page 21 (diagram): This page displays diagrams illustrating various sewing techniques and embroidery styles, including buttonholes, lotus-leaves embroidery, word-embroidery, piecing-together sewing, and looping sewing.
- Page 22 (parts_list): This page lists components of the housing for industrial sewing machines, including part numbers, descriptions, and applicability to different product types.
- Page 23 (parts_list): This page lists parts for sewing machines, including part numbers, descriptions, and applicability for different stitching types. It covers items from serial number 43 to 75.
- Page 24 (diagram): This page displays a diagram of components of the sewing machine housing, with numbered parts indicated.
- Page 25 (parts_list): This page lists thread take-up and needle bar components, including part numbers, descriptions, and applicability to different stitching types and quantities.
- Page 26 (parts_list): This page lists parts for sewing machines, including part numbers, descriptions, and applicability for curved and double-needle stitching.
- Page 27 (diagram): This page displays a diagram of thread take-up and needle bar components, with numbered parts for identification.
- Page 28 (parts_list): This page lists material-feeding components for sewing machines, including part numbers, descriptions, and applicability to different product types like curved stitching and double curved stitching.
- Page 29 (diagram): This page displays a diagram of material-feeding components, with numbered parts and associated references.
- Page 30 (parts_list): This page lists thread-hooking components for sewing machines, including part numbers, descriptions, and applicability to different stitching types.
- Page 31 (diagram): This page displays a diagram of thread-hooking components for an industrial sewing machine, with numbered parts and their corresponding references.
- Page 32 (parts_list): This page lists components of swaying needle, including part numbers, descriptions, and applicable products with quantities for curved stitching and double curved stitching.
- Page 33 (parts_list): Parts table listing items 41 to 61 with code numbers U43T5-44 through U43T5-67, English and Chinese descriptions, and quantities for curved-stitching and double curved-stitching products.
- Page 34 (diagram): This page displays a diagram of components for the swaying needle, with numbered parts and their corresponding references.
- Page 35 (parts_list): This page lists components of the presser foot, including part numbers, descriptions, and applicability to different stitching types.
- Page 36 (diagram): This page displays a diagram of components for the presser foot, with numbered parts indicated.
- Page 37 (parts_list): This page lists components for the needle distance of reversal stitch, including part numbers, descriptions, and applicable products.
- Page 38 (diagram): This page displays a diagram of components for the needle distance of reversal stitch, with numbered parts.
- Page 39 (text): This page describes the display and operation interface of the ZB-20U electric control, including sections on display and operation interface, standby interface, quick speed setting, and needle position setting.
- Page 40 (text): This page describes parameter settings for the sewing machine, including how to enter the parameter setting mode, change parameter values, and save them. It also provides a table listing various parameters with their definitions, setting ranges, factory values, and remarks.
- Page 41 (text): This page describes how to restore factory settings, clear errors with one key, and provides a table explaining the digital tube display for numbers and letters.
- Page 42 (text): This page contains a table listing error codes, their descriptions, and corresponding troubleshooting steps for the industrial sewing machine.
- Page 43 (cover): This is the cover page for a JACK sewing machine parts catalog, featuring the company logo, contact information, and social media links. It indicates the catalog is from the January 2019 edition, revised in June 2019.