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Components of a typical electric sewing machine. (click to enlarge)
Carefully tip or lift the sewing machine from the cabinet to expose components for lubrication.
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A sewing machine is a small appliance that unites or fastens things by stitching. All sewing machines produce a stitch by hooking the needle thread around a second or bobbin thread. Fabric is pulled through the machine using metal feet called feed dogs. Speed is controlled by a foot or knee pedal. Numerous other adjustments can be made to produce various stitches and patterns.
Lubricate a sewing machine:
- Unplug the sewing machine.
- Apply one drop of high-quality sewing machine oil to any parts that move, being especially careful not to oil electrical parts.
Service mechanical parts:
- Unplug the sewing machine.
- Clean the thread tension assembly using tweezers to remove tangles of thread around the disks.
- Use a fine emery cloth to sand off burrs or rust from the bobbin thread tension assembly. Replace any damaged parts.
- As needed, adjust the presser bar screw until the foot is straight.
- As needed, clean the feed assembly: Raise the presser foot, needle, and needle plate. Then unfasten and remove the feed assembly. Remove any obstructions such as thread and lint.
Service the drive belt:
- Unplug the machine.
- Remove the top cover and the hand wheel cover, held in place by screws or other fasteners.
- Remove the belt and inspect it for damage and wear, replacing as needed.
- Reinstall the belt and tighten the motor mounting bolts. Check the belt tension by pushing on the side of the belt.
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