Singer 191D-20 Instruction Manual And Parts List
High speed straight lockstitch sewing machine
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Table of Contents
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Summary of Contents for Singer 191D-20
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Page 1: Instruction Manual
Parts List High Speed Straight Lockstitch Sewing Machine 20 / 20C 30 / 30C 70 / 70C ® Singer is a registered trademark of The Singer Company Limited or its affiliated companies. © 2009 Copyright The Singer Company Limited... -
Page 2: Table Of Contents
Contents 1 Safety Instructions Important Safety Instructions Safe Operation 2 Product Description and Machine Specification Product Description Machine Specification Motor, Motor Pulley and V-Belt Specifications 3 Setup and Adjustment Instructions Table Cut-Out Drawing Oil Reservoir Installation Belt Cover and Bobbin Winder Installation Lubrication Thread Take-up Lever Oil Supply Adjustment Rotating Hook Oil Supply Adjustment... - Page 3 Contents 6 Parts List Frame and Cover Components Arm Shaft and Thread Take-Up Lever Components Needle Bar, Upright Shaft and Rotating Hook Driving Shaft Components Presser Foot Components Feed Mechanism Components Lubrication Components Oil Reservoir Components Belt Cover, Bobbin Winder and Thread Stand Components Machine Accessories...
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Page 4: Safety Instructions
• When the machine is in mainte- following items. cations of use should be followed. nance. Read all instructions, Singer will not be held responsible • When the operator is not run- take care of this for any damage caused by unau- ning the machine. thorized changes in the product. manual, and use it • In case of lubricant oil contact... -
Page 5: Safe Operation
• To avoid the risk of electric shock, • If you machine is equipped with do not open the motor wiring box a servomotor, it does not make and do not touch the components noises while being driven. T o avoid Safe Operation assembled inside the wiring box. a possible accident caused by an unexpected start, be sure the ma- • To avoid injuries do not run the chine is turned off. machine without the belt cover or in case any other safety device is • To avoid electrical shock, do not removed. run the machine without proper grounding. -
Page 6: Product Description And Machine Specification
Product Description and Machine Specification High Speed Straight Lockstitch Sewing Machine Product Description High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 7: Machine Specification
[mm] 191D-20 Standard Light to 5,000 5.5/13.0 30.7 1955-01 #14 medium Koban/ 191D-20C Hirose Regular 191D-30 Standard Fully Medium to Singer “C” 4,500 5.5/13.0 35.0 1955-01 #18 Automatic heavy type oil Koban/ Lubrication 191D-30C Hirose 191D-70 Standard Heavy 3,000 5.5/13.0 35.0... -
Page 8: Setup And Adjustment Instructions
Setup and Adjustment Instructions Table Cut-Out Drawing 2-12.75 Figure 1 High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 9: Oil Reservoir Installation
The oil reservoir should rest on the portion of the table by using nail ‘2’, four corners of the machine table and the other two rubber cushion ‘3’ groove. on the hinge side ‘B’ are attached by Oil Reservoir nail too. Then, the oil reservoir ‘4’ is Two rubber seats ‘1’ for supporting Installation placed (Figures 2 and 3). the head portion on the operator side ‘A’ are fixed on the extended Figure 2 Figure 3 to the cushions ‘3’ on the four cor- Two hinges ‘1’ fit into the hole in the ners of the table (Figures 4 and 5). -
Page 10: Belt Cover And Bobbin Winder Installation
Drill four holes ‘A’, ‘B’, ‘C’ and ‘D’, washers ‘6’. The tightening torque in the machine table for screws for the screw ‘4’ is about 30 kgf×cm, (Figure 6). and for the screw ‘5’ is about 25 Belt Cover and kgf×cm. Insert support ‘1’ in the threaded Bobbin Winder hole in the housing. Move the back belt cover ‘2’ back- Installation ward, until its rubber touches the Install the front belt cover ‘3’ and... -
Page 11: Lubrication
Before turning the machine on, When you operate the machine af- fill oil reservoir ‘1’ with sewing ter lubrication, you will see splash- machine oil up to ‘MAX’ mark ‘A’ ing oil through oil sight window ‘2’ Lubrication (Figure 7). if the lubrication is adequate. When the oil level lowers below Note that the amount of the splash- Precaution ‘MIN’ mark ‘B’, refill the oil reser- ing oil is unrelated to the amount voir with the specified oil. -
Page 12: Rotating Hook Oil Supply Adjustment
Unused machine should run idle for Make sure the oil in the oil reservoir 3 minutes (Moderate intermittent is within ‘MAX’ and ‘MIN’ . operation). The confirming time of the oil Rotating Hook The amount of oil confirmation paper amount is 5 seconds (check the pe- Oil Supply must be inserted in the state when riod of time with a watch). Adjustment the machine is running (Figure 9). Figure 9 Sample showing the appropriate generate heat or the sewing mate- amount of oil (Figure 10) rial will be contaminated. -
Page 13: Needle Attachment
Turn the hand wheel until the nee- of the arrow until it will go no fur- dle bar reaches the highest point ther. of its stroke (Figure 12). Tighten the screw ‘2’. Needle Loosen screw ‘2’ and hold needle Make sure the long groove ‘C’ of Attachment ‘1’ with its indented part ‘A’ facing the needle is facing exactly to the exactly to the right in direction ‘B’. left in direction ‘D’. Caution Insert the needle in the direction Choose a proper needle size according to the count of thread and the type of sewing material used. -
Page 14: Bobbin Case Attachment
der the tension spring and come Fix the bobbin into bobbin case with that the thread open end is directed out from notch ‘B’ (Figure 13). to the left as observed from you. When pulling the thread ‘C’, the Bobbin Case Pass the thread through thread slit bobbin should rotate in the direc- Attachment ‘A’, and pulls it in direction ‘C’. By tion of the arrow. doing so, the thread will pass un- Figure 13 When threading the machine head, Thread the machine in the order... -
Page 15: Stitch Length Adjustment
3.10 Turn stitch length dial ‘1’ in the direc- When you want to decrease the stitch tion of the arrow, and align the de- length, turn stitch length dial ‘1’ while sired number to marker dot ‘A’ on the pressing feed reverse lever ‘2’ in the Stitch Length machine arm (Figure 15). direction of the arrow. Adjustment The indication of the dial is in milli- meters. Figure 15 3.11 Adjusting needle thread tension Adjusting the bobbin thread ten- (Figure 16) sion (Figure 17) Adjust the tension of needle thread... -
Page 16: Thread Take-Up Spring Adjustment
3.12 Loosen setting screw ‘4’ and turn The adjustment of the stroke of the the tension post ‘3’. thread take-up spring (Figure 18) Turn the tension post ‘3’ clockwise Loosen setting screw ‘2’. Thread (in direction ‘A’), the pressure of the Turn the thread tension post ‘3’ Take-Up Spring spring will be increased. clockwise (in direction ‘A’), the Adjustment Turn the tension post ‘3’ coun- stroke of the thread take-up spring ter clockwise (in direction ‘B’), the will be increased. -
Page 17: Knee Lifter Height Adjustment
3.13 When the presser foot lifts to over When using the knee lifter, the 10 mm, be sure that the bottom end standard height of presser foot is of the needle bar ‘2’ in its lowest 10 mm. Knee Lifter Height position does not hit the presser You can adjust the presser foot lift foot ‘3’ (Figure 21). Adjustment up to 13 mm by turning the knee lifter adjusting screw ‘1’ (Figure 20). -
Page 18: Presser Foot Pressure Adjustment
3.15 Tighten nut ‘2’. Loosen the nut ’2’ , and turn the presser spring regulator ‘1’ clock- For general sewing of the fabrics, wise (in direction ‘A’), the pressure the standard height of the presser Presser Foot of the presser foot will be increased spring regulator ‘1’ will be around Pressure (Figure 24). 33~36 mm (5 kg). Adjustment Turn the regulator ‘1’ counter clock- wise (in direction ‘B’), the pres- sure of the presser foot will be de- creased. -
Page 19: Feed Timing Adjustment
3.16 plate when the feed dog descends Loosen screws ‘2’ and ‘3’ in feed below the throat plate. eccentric cam ‘1’, move the feed eccentric cam ‘1’ in the direction To advance the feed timing in order Feed Timing of the arrow or opposite direction to prevent uneven material feed, Adjustment of the arrow, and firmly tighten the move the feed eccentric cam in the screws ‘2’ and ‘3’ (Figure 25). direction of the arrow. -
Page 20: Feed Dog Height Adjustment
3.17 When the feed dog ‘A’ is at its high- Loosen screw ‘2’ of crank ‘1’. est position, the teeth should be Move the feed bar up or down to above the top surface of the throat make a correct height. Feed Dog Height plate ‘B’ as the below height for Securely tighten screw ‘2’. Adjustment each machine variety (Figure 26). Caution If the screw ‘2’ is tightening too much, the See description below for height crank ‘1’... -
Page 21: Needle To Rotating Hook Relation Adjustment
3.18 Adjusting the position of the rotat- Adjusting the height of the needle ing hook bar (Figure 27) Loosen two rotating hook set- Turn the handwheel until the nee- Needle to screws and turn the handwheel un- dle bar has been at the lowest Rotating til the line ‘B’ on needle bar align point, loosen the setscrew ‘1’. -
Page 22: Presser Bar Height Adjustment
3.19 throat plate and the presser foot is Loosen setscrew ‘1’ (Figure 28) and 5.5 mm (Figure 29). adjust the height of the presser bar. When the presser foot rises to the Tighten the setscrew ‘1’ after ad- Presser highest, the distance between the justment. Bar Height Adjustment 5,5mm Figure 28 Figure 29 High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 23: Thread Take-Up Stroke Adjustment
3.20 right (in direction ‘B’) to decrease When sewing for heavy weight ma- the length of thread pulled out by terial, the thread guides ‘1’ move to the thread take-up. the left (in direction ‘A’) to increase Thread Take- the length of thread pulled out by When marker line ‘C’ on the thread Up Stroke the thread take-up. guide ‘1’ is aligned with the center of Adjustment the screw that is standard (Figure 30). When sewing light weight material, the thread guides ‘1’ move to the Figure 30 High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 24: Maintenance
Maintenance Clean the machine periodically with a soft and dry cloth to remove the excess of dust on the machine head. Machine Head Do not use any kind of lacquer thin- Cleaning ner to wipe the surface. If the machine was idle for a long time, lubricate the machine accor- ding to the instructions of topics Lubrication 3.4 to 3.6. Check periodically if all safety de- Check if the v-belt is not excessively vices are properly installed and ad- worn and if it has the right tension. -
Page 25: Troubleshooting
Troubleshooting Problems Possible Causes Possible Solutions 1. Needle is installed wrong 1. Install needle correctly 2. Wrong needle type or size 2. Use proper needle for fabric and thread 3. Needle is bended 3. Replace needle Needle break 4. Wrong relation with rotary hook 4. -
Page 26: Parts List
Parts List High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 27: Frame And Cover Components
Frame and Cover Components Qty. Part No. Description 20 20C 30 30C 70 70C 10101034 Face plate 10122096 Face plate gasket 101S11010 Screw SM1/8x44 L=4 10112024 Arm oil shield assembly 10122005 Rubber plug High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... - Page 28 Thread guide rod assembly 10112008 Thread guide rod 10112009 Tension disk 10127004 Tension spring 101S30003 Hinge screw J900112-002 Singer logo resin plate (front) J900112-004 Singer logo resin plate (back) High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List...
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Page 29: Arm Shaft And Thread Take-Up Lever Components
Arm Shaft and Thread Take-Up Lever Components High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 30: Arm Shaft
Qty. Part No. Description 20 20C 30 30C 70 70C 10126001 Thread take-up crank shaft Arm Shaft 101S15001 Screw SM15/64 x 28 L=10.5 and Thread 101S3001 Screw Take-Up Lever 10105001 Thread take-up lever link Components 10105006 Thread take-up lever link 1223800300 Thread take-up lever link assembly 10124001... -
Page 31: Needle Bar, Upright Shaft And Rotating Hook Driving Shaft
Needle Bar, Upright Shaft and Rotating Hook Driving Shaft Components Qty. Part No. Description 20 20C 30 30C 70 70C 10122013 10103009 Needle bar bushing (upper) 10102002 Needle bar 10102012 Needle bar 10102021 Needle bar 10138002 Needle bar connection 101S11005 Screw SM9/64 x 40 L=6 10109001 Slide block... -
Page 32: Needle Bar
Qty. Part No. Description 20 20C 30 30C 70 70C 101S11006 Screw SM 1/8 x 44 L=4.5 Needle Bar, 10113002 Needle bar thread guide Upright Shaft and 1955-01 Needle #14 Rotating Hook 1955-01 Needle #18 Driving Shaft 1955-01 Needle #21 10125004 Gear Components... -
Page 33: Presser Foot Components
Presser Foot Components High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... - Page 34 Qty. Part No. Description 20 20C 30 30C 70 70C 10111001 Hand lifter Presser Foot 101S11010 Screw SM9/64 x 40 L=9.5 Components O01004 Rubber ring 1011000200 Hand lifter cam assembly 1011201100 Hand lifter link assembly H05009 Snap ring 101S20001 Link screw stud 1011600100 Presser foot assembly 1011600400...
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Page 35: Feed Mechanism Components
Feed Mechanism Components Qty. Part No. Description 20 20C 30 30C 70 70C 10105005 Feed regulator connecting rod 12212003 Feed regulator connecting rod 10126016 Feed regulator pin 10101004 Feed regulator 10103020 Feed regulator bushing 10126014 Feed regulator screw 10127010 Spring 10126015 10111052 Feed dial... -
Page 36: Feed Mechanism
Qty. Part No. Description 20 20C 30 30C 70 70C 101S11005 Screw SM9/64x 40 L=6 Feed Mechanism 10105004 Feed lifting rock shaft crank connecting rod Components 10122016 Rubber ring 10127012 Spring 12227001 Spring H05009 Snap ring 1010400500 Feed reverse arm assembly 101S17003 Screw H05009... -
Page 37: Lubrication Components
Lubrication Components High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... - Page 38 Qty. Part No. Description 20 20C 30 30C 70 70C 10111004 Oil sight window Lubrication 10122019 Rubber ring Components 10121002 Arm shaft oil tube 101S30008 Oil pump support 101S11026 Screw SM15/64 x 28 L=9 101S11004 Screw SM3/16 x 28 L=6 10127015 Oil felt clip 1012701500...
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Page 39: Oil Reservoir Components
Oil Reservoir Components High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... - Page 40 Qty. Part No. Description 20 20C 30 30C 70 70C 10111005 Knee presser lift rod Oil Reservoir 1010100600 Oil reservoir assembly Components 10101006 Oil reservoir 10122020 Gasket 10122031 Rubber cushion 101S11028 Screw 10122021 Rubber ring 101112027 Knee lifter connecting rod 10127016 Spring H05010...
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Page 41: Belt Cover, Bobbin Winder And Thread Stand Components
Belt Cover, Bobbin Winder and Thread Stand Components High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... -
Page 42: Belt Cover
Qty. Part No. Description 20 20C 30 30C 70 70C 1011100600 Belt cover assembly Belt Cover, 10111006 Belt cover Bobbin Winder 1011100900 Belt cover back assembly and Thread Stand 10111009 Belt cover back Components 1011101000 Belt cover back latch 101S30012 Belt cover support 101S11029 Belt cover screw... -
Page 43: Machine Accessories
Machine Accessories High Speed Straight Lockstitch Sewing Machine Instruction Manual and Parts List... - Page 44 Qty. Part No. Description 20 20C 30 30C 70 70C 1011203100 Machine hinge plate Machine 10122026 Machine hinge rubber cushion Accessories 101S30010 Nail Set 1955-01 Needle #14 1955-01 Needle #18 1955-01 Needle #21 10131002 Screw driver (large) 10131003 Screw driver (medium) 10131004 Screw driver (small) 10118003...
- Page 45 ® Singer is a registered trademark of The Singer Company Limited or its affiliated companies. © 2008 Copyright The Singer Company Limited...