Singer 20U-109, 109C, 112, 112C, 309 Instruction Manual

Singer 20U-109, 109C, 112, 112C, 309 manual cover

Pages 60

Year 2009

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of 60

Singer 20U-109, 109C, 112, 112C, 309 Specification

The Singer 20U series, encompassing models 20U-109, 20U-109C, 20U-112, 20U-112C, and 20U-309, represents a versatile range of industrial sewing machines designed to deliver precision and durability for various textile applications. Each model in this series is engineered to handle a variety of fabrics, including lightweight materials and heavy-duty textiles, making them suitable for garment manufacturing, upholstery, and more.

The 20U series features a robust build with a high-speed capability, capable of reaching up to 2,500 stitches per minute. This enables efficient and fast sewing operations while maintaining consistent stitch quality. The machines are equipped with an oscillating shuttle hook and offer a maximum stitch length of 5mm, providing flexibility in stitch customization. Additionally, the 20U models come with a drop feed system that allows for free-motion sewing, which is ideal for embroidery and intricate stitching tasks.

Differentiating primarily in their configurations and intended use, the 20U-109 and 20U-109C models focus on general sewing tasks, while the 20U-112 and 20U-112C are enhanced for more demanding applications, featuring improved tension control and a wider range of stitch adjustments. The 20U-309 model stands out with its advanced features tailored for specialized industrial use, offering superior performance in complex sewing operations.

All models are designed with user-friendly interfaces, including an adjustable presser foot to accommodate various fabric thicknesses and an intuitive threading system for ease of use. The machines are compatible with a wide range of sewing accessories, enhancing their adaptability for different sewing projects. With a focus on reliability and performance, the Singer 20U series remains a staple in the industrial sewing machine market, offering a blend of innovation and traditional sewing excellence.

Singer 20U-109, 109C, 112, 112C, 309 F.A.Q.

How do I properly thread the Singer 20U-109 sewing machine?

To thread the Singer 20U-109, start by raising the presser foot and turning off the power. Place the spool on the spool pin and draw the thread through the thread guide. Follow the threading path marked on the machine, ensuring the thread passes through the tension discs and take-up lever. Finally, thread the needle from front to back.

What should I do if the Singer 20U-112 is skipping stitches?

If your Singer 20U-112 is skipping stitches, first check the needle to ensure it is not bent or dull. Replace it if necessary. Also, verify that the needle is inserted correctly and that the machine is threaded properly. Lastly, check the tension settings and adjust if needed.

How can I adjust the tension on my Singer 20U-309?

To adjust the tension on the Singer 20U-309, use the tension dial located on the machine's front. Turn it clockwise for higher tension and counterclockwise for lower tension. Test on a scrap fabric to achieve the desired stitch quality.

What maintenance does the Singer 20U-109C require?

Regular maintenance for the Singer 20U-109C includes cleaning the bobbin case and feed dogs, oiling the machine as per the manual's instructions, and checking for lint or thread build-up. Ensure the machine is turned off and unplugged before performing any maintenance.

Why does my Singer 20U-112C make a knocking noise?

A knocking noise in the Singer 20U-112C may be caused by incorrect needle installation, bent needles, or a need for lubrication. Check the needle first and replace if necessary. Then, refer to the manual for lubrication points and apply sewing machine oil.

How do I change the needle on the Singer 20U-309?

To change the needle on the Singer 20U-309, turn the machine off and raise the needle to its highest position. Loosen the needle clamp screw and remove the old needle. Insert the new needle with the flat side facing the back and tighten the clamp screw.

What should I do if the fabric is not feeding correctly on my Singer 20U-109C?

If the fabric is not feeding correctly on the Singer 20U-109C, check the feed dogs to ensure they are raised. Also, verify that the presser foot is down and adjust the presser foot pressure if necessary. Clean any lint or debris from the feed dogs.

How can I troubleshoot tension issues on the Singer 20U-112?

To troubleshoot tension issues on the Singer 20U-112, first ensure the machine is threaded correctly and the needle is appropriate for the fabric. Adjust the upper tension dial and test on a scrap piece of fabric to find the right balance.

How often should I oil my Singer 20U-109 sewing machine?

The Singer 20U-109 should be oiled after every 8 hours of use or once a week if used less frequently. Apply sewing machine oil to the designated oiling points as specified in the user manual to ensure smooth operation.

What is the correct way to wind a bobbin on the Singer 20U-112C?

To wind a bobbin on the Singer 20U-112C, place the bobbin on the winder spindle and the spool of thread on the spool pin. Guide the thread through the bobbin winding tension disc and insert it into the bobbin. Push the bobbin to the right to engage, then start the machine to wind.