Introducció
This manual provides detailed instructions for the operation and maintenance of Singer Sewing Machine Models 127 and 128-3. These machines are designed to produce a reliable lock stitch and are suitable for general family use. Understanding the proper setup and care will ensure optimal performance and longevity of your sewing machine.
Please read all instructions carefully before operating the machine. Familiarize yourself with all parts and their functions to prevent injury and ensure correct usage.

Image: Cover of the instruction manual for Singer Sewing Machine Models 127 and 128-3. The cover displays the title and illustrations of the sewing machines.
Configuració
Col·locació de la màquina
Place the sewing machine on a stable, level surface. Ensure adequate lighting for your work area. If your machine is treadle-operated, ensure the treadle mechanism is free from obstructions.
Bobinant la bobina
To wind the bobbin, first release the balance wheel (D, Fig. 3) to disengage the sewing mechanism. This allows the bobbin winder to operate independently. Follow the specific threading path for bobbin winding as indicated in your machine's design. Once the bobbin is full, re-engage the balance wheel.
Enfilant l'agulla
Proper needle threading is crucial for stitch formation. Follow these steps:
- Col·loqueu el carret de fil al passador del carret.
- Guide the thread through the upper tension discs.
- Pass the thread through the take-up lever.
- Enfileu l'agulla de davant a darrere.

Image: Figure 11 from the manual, illustrating the path for threading the needle. Key points are numbered for clarity, showing the thread passing through various guides and tension points before reaching the needle.
Funcionament de la màquina
Davant View i components clau
Familiaritzeu-vos amb els components principals de la vostra màquina de cosir:
- A: Peu premsador
- B: Presser Bar Lifter
- C: Donar gossos
- D: Roda d’equilibri
- E: Pin de bobina

Image: Figure 3 from the manual, showing a front view of the Singer sewing machine with various parts labeled A through E, including the presser foot, presser bar lifter, feed, and balance wheel.
Començant a cosir
To begin sewing, raise the presser foot (B, Fig. 3) using the presser bar lifter. Place your fabric under the presser foot, aligning the edge with the desired seam allowance. Lower the presser foot onto the fabric. Begin operating the machine by turning the balance wheel towards you or by engaging the treadle/motor. Guide the fabric gently as the machine stitches.
Adjusting Stitch Length and Tension
Refer to your machine's specific controls for adjusting stitch length and thread tension. Proper tension is essential for a balanced stitch, where the upper and lower threads interlock evenly within the fabric layers.
Manteniment
Neteja
Regular cleaning is vital for smooth operation. Use a small brush to remove lint and dust from the bobbin case, feed dogs, and other accessible areas. Avoid using harsh chemicals.
L'oli
Apply a small amount of good quality sewing machine oil to all moving parts as indicated in your machine's specific oiling points. Over-oiling can attract more lint, so use sparingly. Consult a detailed diagram for precise oiling locations.
Substitució de l'agulla
Replace the needle regularly, especially if it becomes bent, dull, or if you experience skipped stitches. Always use the correct type and size of needle for your fabric and thread.
Resolució de problemes
Aquesta secció tracta els problemes habituals que podeu trobar:
- Punts saltats: Check if the needle is inserted correctly, if it's bent or dull, or if the thread is properly tensioned.
- Trencaclosques: Ensure the machine is threaded correctly, the tension is not too tight, and there are no burrs on the needle or thread guides.
- Puntades desiguals: Verify that the upper and lower thread tensions are balanced. Clean the feed dogs if they are clogged with lint.
- Bloqueig de la màquina: Stop immediately. Remove the fabric and check for tangled threads in the bobbin area or around the needle plate.
Especificacions
- Models coberts: Singer 127, Singer 128-3
- Tipus de punt: Puntada de bloqueig
- Tipus de màquina: Vibrating Shuttle
- Fabricant: The Singer Manufacturing Co.
Support and Trademarks
The Singer Manufacturing Company holds registered trademarks for its products. Any repair, rebuild, recondition, or alteration of a Singer machine by unauthorized parties is strictly forbidden. For official support or inquiries, please contact The Singer Manufacturing Co.
This manual is a copy of the original instructions for the Singer 127 and 128-3 sewing machines.