SINGER 7640 Confidence Interactive Manual
Interactive instruction manual by Singer Sewing Outlet

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Your SINGER 7640 Confidence

Singer's instructions rewritten in plain English, with every setting kept exactly as Singer intended, and with tips from our team added along the way. Stuck on something? Ask the Live Sewing Advisor at any point.

This manual applies to UK spec machines.

SINGER Confidence 7640
SINGER Confidence 7640

Watch Singer’s owner’s class

A full walk-through of your machine from Singer - setting up, threading, winding the bobbin and your first stitches. Short videos for each step are in the sections below.

Please note: the model number shown in the video may vary, as it was made in the US, but the functions are the same as your model.

Important - please read: getting the best out of your machine

The questions our customers ask us most - worth two minutes before you start.

  1. 💡
    Always turn the handwheel towards you
    Turning it backwards can make the machine jam when you start to sew.
  2. 🔄
    Raise the presser foot before you thread
    With the foot down, the thread misses the tension discs and you get big loops under the fabric.
  3. 💡
    Class 15 transparent bobbins only
    Use the same plastic bobbins that came with the machine. Never metal bobbins.
  4. ⚡
    Switch off before you thread or change anything
    Turn the power switch to O (off) before threading, changing the needle or foot, or taking out the bobbin.
  5. 📦
    Keep the box and packaging
    Please keep the box and packaging for your machine, should it ever need to be sent away for servicing or repair.
  6. 🔄
    Stitching problems? Rethread first
    If you ever have an issue with stitching, tension, looping or jamming, the first thing to do is rethread the machine. If the issue persists, change the needle and bobbin, clean out the bobbin area, and make sure no thread is stuck anywhere in the thread path or in the bobbin area. If you have tried all of these and are still having issues, please do get in touch with our support team.
  7. 🧹
    Keep the bobbin area clean
    We recommend you clean out your bobbin area with a brush or cotton bud every 4 to 6 bobbin changes, to keep your machine free of lint and debris.
  8. 🔄
    Change your needle
    To keep your machine stitching perfectly, we recommend changing your needle every 6 to 8 hours of sewing. We supply needles in different sizes and for different types of materials - including stretch, jeans/denim, leather, and multiple sizes of universal needles to suit the weight of the fabric.
  9. 🧵
    Use good thread
    Always try to use good quality branded threads such as Gutermann, Coats, Hemline or Mettler. Avoid non-branded threads, such as ones found in supermarkets or on some online marketplaces.
  10. ✅
    Use the correct bobbin
    With very few exceptions, Singer machines use Class 15 plastic bobbins. Always use the type that came with your machine - we recommend genuine bobbins only. Even slight differences in bobbin size or weight can cause the machine not to stitch correctly.
  11. ⚙
    Let the machine feed the fabric
    Modern machines have extremely good feeding mechanisms, designed to pull the fabric through the machine for you. Try to avoid pulling the fabric through to the point of bending the needle, as this can cause the needle to strike the bobbin case or needle plate.
  12. 💬
    We are here to help
    Always feel free to message us for help and advice on how to get the best out of your machine.

Getting to know your machine

Important safety instructions

When using any electrical appliance, basic safety precautions should always be followed, including the ones below. Read all the instructions before using this sewing machine, keep them somewhere handy near the machine, and pass them on if the machine is given to someone else.

DANGER - to reduce the risk of electric shock

  • Never leave the machine unattended while it is plugged in. Always unplug it from the socket straight after use, and before cleaning, removing covers, lubricating or making any other adjustment mentioned in this manual.

WARNING - to reduce the risk of burns, fire, electric shock or injury

  1. Do not let the machine be used as a toy. Take close care when it is used by or near children.
  2. Only use the machine for its intended purpose, as described in this manual. Only use attachments recommended by the manufacturer, as listed in this manual.
  3. Never use the machine if the cord or plug is damaged, if it is not working properly, or if it has been dropped, damaged or dropped into water. Take it to your nearest authorised dealer or service centre to be examined, repaired or adjusted, electrically or mechanically.
  4. Never use the machine with any of its air openings blocked. Keep the ventilation openings of the machine and the foot control free from lint, dust and loose cloth.
  5. Keep your fingers away from all moving parts. Take special care around the needle.
  6. Always use the correct needle plate. The wrong plate can cause the needle to break.
  7. Do not use bent needles.
  8. Do not pull or push the fabric while sewing. It can bend the needle and make it break.
  9. Wear safety glasses.
  10. Turn the power switch to O (off) when making any adjustments in the needle area - threading the needle, changing the needle, threading the bobbin, changing the presser foot and so on.
  11. Never drop or insert any object into any opening.
  12. Do not use outdoors.
  13. Do not use where aerosol (spray) products are being used or where oxygen is being given.
  14. To disconnect, turn all controls to off (O), then take the plug out of the socket.
  15. Do not unplug by pulling the cord. Hold the plug, not the cord.
  16. The foot control is used to run the machine. Don't put anything else on the foot control.
  17. Do not use the machine if it is wet.
  18. If the LED light is damaged or broken, it must be replaced by the manufacturer, its service agent or a similarly qualified person, to avoid a hazard.
  19. If the cord fixed to the foot control is damaged, it must be replaced by the manufacturer, its service agent or a similarly qualified person, to avoid a hazard.
  20. This machine is double insulated. Only use identical replacement parts - see Servicing a double insulated machine below.
  21. Only use the foot control supplied with the machine, or one supplied by an approved SINGER retailer.

Children and people who need supervision

  • This machine can be used by children aged 8 and over, and by people with reduced physical, sensory or mental capabilities or lack of experience and knowledge, as long as they are supervised or have been shown how to use it safely and understand the hazards.
  • Children must not play with the machine. Cleaning and user maintenance must not be done by children without supervision.
  • The noise level in normal use is less than 75dB(A).

Servicing a double insulated machine

A double insulated machine has two systems of insulation instead of an earth. It has no earth, and one must not be added. Servicing it takes great care and knowledge of the system, and should only be done by qualified service staff. Replacement parts must be identical to the parts in the machine. A double insulated machine is marked "DOUBLE INSULATION" or "DOUBLE INSULATED".

NoteThis sewing machine is for household use only. Please read these instructions. This manual can be printed.

Parts of the machine - front

  1. Thread tension dial - sets the right tension for your stitch, thread and fabric.
  2. Thread take-up lever - controls the flow of the upper thread as you sew.
  3. Operation buttons - needle up/down, start/stop and reverse.
  4. Thread cutter - for trimming thread ends when you finish sewing.
  5. Needle threader lever - works the automatic needle threader.
  6. Presser foot - holds the fabric against the feed teeth, which draw it under the foot as you sew.
  7. Needle plate - has guide lines to help you keep seams straight.
  8. Removable storage compartment - a flat sewing surface, storage for accessories, and access to the free arm.
  9. Bobbin winding stopper - stops the winding when the bobbin is full.
  10. Speed control adjustment lever - sets how fast the machine sews, with the foot control or the start/stop button.
  11. LCD screen - shows the stitch number, stitch length or stitch width, depending on the mode.
  12. Function buttons - stitch width, stitch length, and the memory for letters and numbers.
  13. Pattern adjustment buttons - choose the stitch. The left button changes the left digit and the right button the right digit.
  14. Bobbin - holds the thread that forms the stitches on the underside of the fabric.
Drawing from the SINGER manual

Parts of the machine - back

  1. Horizontal spool pin - holds the spool and spool cap for the upper thread.
  2. Bobbin winding spindle.
  3. Hole for the second spool pin - for an upright spool, or two spools at once for twin needle sewing.
  4. Handwheel - ALWAYS turn it towards you. It moves the needle and the thread take-up lever.
  5. Handle - for lifting and carrying the machine.
  6. Power and light switch - turns on the machine and the sewing light together.
  7. Main plug socket - for the power cord.
  8. Foot control connector.
  9. Bobbin winding tension disk - holds the thread snugly so the bobbin winds smoothly and evenly.
  10. Pre-tension thread guides - keep the thread flowing evenly as you sew.
  11. Stitch chart holder - fits into the left-hand side of the handle to hold the stitch chart.
  12. Stitch pattern chart - shows every stitch. Flip it towards you to see them. You will find it in the bag with this instruction manual.
  13. Face plate - covers the moving parts inside.
  14. Presser foot lifter - raises and lowers the presser foot. Up for threading, down for sewing.
  15. Drop feed lever - puts the feed teeth up for sewing, or down for sewing on a button.
  16. Foot control - the harder you press, the faster you sew.
  17. Power cord.
Key pointAlways turn the handwheel towards you. Turning it backwards can make the machine jam when you start to sew.
Drawing from the SINGER manual

The rest of this manual is for our customers

26 more sections, including step-by-step guides, stitch settings and troubleshooting.

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