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MSK-8400BL-18
MSK-8420BL-18
Industrial Sewing Machine
Instruction Manual
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CONTENTS Operation instruction 1. Brief introduction 1 2. Main specifications 1 3. Machine installation and operation preparation 1 1. Machine installation 1-3 2. Operation preparation and notice before running 3-4 4. Machine operation 5-6 1. Coordination among needle, thread and materials 5 2. Install the needle 5 3. Winding the bobbin thread 5-6 5. Machine adjustment 6-9 1. Adjust the needle thread tension and bobbin thread tension 6-7 2. Adjust the pressure of presser foot 7
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Operation instruction
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MSK-8420BL-18 machine adopts straight double needle Model MSK-8400BL-18 MSK-8420BL-18 and two vertical auto-lubricating hooks for thread looping, sliding lever for thread take up to form two Applications Medium and heavy weight materials lines of lockstitch seam. The upper and lower shafts Max. Sewing speed 1200s.p.m are supported by needle bearing and driven by Max. Stitch length 9mm toothed belt, plunger oil pump lubrication system, Needle bar stroke 36mm compound feed mechanism of feed dog,
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1.4 Install the presser foot lifting controller (Fig. 3) 3 First connect the chain B with presser foot lift lever C by hooks A, then install the pedal assembly D on the rung of the stand, move the controller E leftward or rightward to make the chain in one line, fix it C with bolt and nut, finally connect the hook with the controller E. . A (An automatic presser foot lifter is also available, B please refer to parts manual
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1.7 Connecting the clutch lever to the pedal (Fig. 6) 6 A. The optimum tilt angle of pedal against floor is approx. 20 30 . . B. Adjust the clutch of motor so that the clutch lever C and draw bar B run in line. . C. The machine hand wheel should rotate G 10~12mm counter-clockwise for normal sewing when view F from opposite side of balance wheel. The motor should rotate in the same direction. The rotatio
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B. When the machine starts for initial time or reuse 9 after a long time, the proper oil amount should be filled in the sections of machine shown by arrows in Fig. 8,9. When it is in operation, please observe the oil sparking in oil screen to check the oil condition. . C. When a new machine starts running, for extending its lift, please run at a medium and low speed (1000s.p.m) for about a month and then raise the speed gradually. . D. Please turn off the power wh
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3. Winding the bobbin thread 12 3.1 The method of winding Insert the bobbin B into winder shaft, threading the A thread A to upper and lower holes of pin E, then to thread tension disc F, draw the thread tip and wind thread several circles around bobbin B, put the E F winding lever D into bobbin B, then it can automatic winding when sewing. (If only winding, not sewing, please lift the presser foot.) . Please don't overfill the bobbin thread, otherwise t
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3.4 Placing bobbin (Fig. 15) 15 Note: when bobbin is placed into the bobbin case, the thread should be wound properly in the correct direction Thread shown in the figure. . Sliding plate Hook Hook Sliding plate 3.5 Drawing thread from the bobbin (Fig. 16) 16 A. Draw the thread end to bobbin slot shown in the Thread figure, and pull it out down through the inner bobbin stop piece.
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A. If the stitch seam shows as Fig. 17B, indicates 18 that the needle thread tension is too tight or the bobbin thread tension is too loose. Please turn the thread tension nut counter-clockwise to release the Loosen needle thread pressure; or turn the bobbin lace adjusting screw with a screwdriver to increase the bobbin thread tension.( See Fig. 18,19) . Tighten Adjusting screw B. If the needle thread tension is too loose or the bobbin thread tension is too tight shown as F
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3.2 How to reset the safety clutch device (Fig.22) 22 A. While press down the button on the bed surface with left hand, turn the hand wheel slowly with right hand in the direction shown in Fig. 22 (clockwise). . B. When the stopper brakes the hand wheel, more strength is needed to turn the balance wheel to reset the safety clutch device. . Handwheel C. Release the button.
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3.5 Adjust the vertical stroke of presser foot (Fig. 25) 25 When stitch on the very elastic materials or the thickness of sewing materials changes, the adjustment should be done in the following order: . A. Loosen the special stud. . B. When the central line distance between the special stud and the presser foot lifting rear crank becomes Crank shorter, the vertical stroke of presser foot will Increase Increase Increase become longer, on the contra
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Parts manual
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1.MSK-8420BL-18 machine casting components 10 28 18 17 43 42 41 11 9 10 67 12 68 13 7 34 8 33 2 32 6 14 31 37 1 30 40 29 19 23 66 22 5 27 21 20 65 36 4 26 3 35 63 64 44 38 45 55 46 47 14 45 48 58 62 57 49 39 25 24 16 15 13 61 60 12 53 52 51 50 59 56 54
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1.MSK-8420BL-18 machine casting components Qt. No . Part number Name Remark 1 43WF1-001 Machine bed 1 2 43WF1-002 Machine arm 1 3 Pin 2 A6 30 GB117-86 4 Screw 1 M10 35 GB70-85 5 Screw 3 M10 35 GB5781-85 43WF1-003B 6 Model label 1 7 43WF1-004B Brand label 1 8 Rivet 4 2.5 5 GB827-86 9 1WF1-015 Upper thread guide 1 10 1WF1-016 Screw 2 SM11/64" 40/8 11 1WF1-017 Back cover 1 12 1WF1-011 Screw 15 SM11/64" 40/9 13 22T1-007 Washer 15 14 1WF1-032 Cover 2 PE Front slide plate 15 1WF1-038 1 16 1WF1-039 Sc
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1.MSK-8420BL-18 machine casting components 12 28 18 17 43 42 41 11 9 10 67 12 68 13 7 34 8 33 2 32 6 14 31 37 1 30 40 29 19 23 66 22 5 27 21 20 65 36 4 26 3 35 63 64 44 38 45 55 46 47 14 45 48 58 62 57 49 39 25 24 16 15 13 61 60 12 53 52 51 50 59 56 54
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1.MSK-8420BL-18 machine casting components Qt. No . Part number Name Remark 44 1WF1-010A Thread tension fixing bracket assembly 1 45 1WF1-010B Thread guide bracket 2 46 1WF1-010C Thread guide plate 2 47 1WF1-010D Spring 2 48 1WF1-010E Thread guide bracket screw assembly 2 49 1WF1-010M Thread releasing pin (short) 1 50 1WF1-010H 3 Thread tension nut 51 1WF1-010G Thread tension spring 2 52 1WF1-010S Thread releasing disc 2 53 1WF1-010F Thread tension disc 4 54 1WF1-010R Screw 1 55 1WF1-010Q Screw
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2.MSK-8400BL-18 machine casting components 14 39 26 18 17 41 40 11 9 10 64 65 12 13 7 8 32 31 2 30 6 14 29 35 1 28 38 27 21 20 63 5 25 34 19 4 24 3 33 61 62 42 36 43 53 44 45 14 43 46 56 60 55 47 23 22 37 16 15 13 59 58 12 51 50 49 48 57 54 52
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Qt. No . Part number Name Remark 1 44WF1-003 Machine bed 1 2 43WF1-002 Machine arm 1 3 Pin 2 A6 30 GB117-86 4 Screw 1 M10 35 GB70-85 5 Screw 3 M10 35 GB5781-85 6 44WF1-002 Model label 1 7 44WF1-005 Brand label 1 8 Rivet 4 2.5 5 GB827-86 9 1WF1-015 Upper thread guide 1 10 1WF1-016 Screw 2 SM11/64" 40/8 11 1WF1-017 Back cover 1 12 1WF1-011 Screw 15 SM11/64" 40/9 13 22T1-007 Washer 15 PE 14 1WF1-032 Cover 2 15 1WF1-038 Front slide plate 1 16 1WF1-039 Screw 1 SM11/64" 32/5.4 17 1WF1-019 Thread take-
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16 39 26 18 17 41 40 11 9 10 64 65 12 13 7 8 32 31 2 30 6 14 29 35 1 28 38 27 21 20 63 5 25 34 19 4 24 3 33 61 62 42 36 43 53 44 45 14 43 46 56 60 55 47 23 22 37 16 15 13 59 58 12 51 50 49 48 57 54 52
