DT 927 Double needle feed-off-the-arm chain stitch machine

DT 927 Double Needle Feed-off-the-arm Chain stitch Sewing Machine – Features & FAQ

The DT 927 is a double needle feed-off-the-arm chain stitch machine, also known as a cylinder bed interlock machine or crank arm machine. It features a cantilevered cylinder arm structure specifically designed for lap seaming of tubular parts such as cuffs, sleeves, and trouser legs.

This classic model is widely used in sewing various fabrics including men's wear, women's wear, shirts, uniforms, casual pants, jeans, and rainwear. Its robust construction and reliable chain stitch formation make it a preferred choice for manufacturers requiring both elasticity and strength in seams.

Applications

The DT 927 is suitable for lap seaming and joint sewing of tubular and cylindrical garment parts. Typical applications include:

• Sleeves – attaching sleeves to garment bodies

• Trousers – inseams, side seams, and hemming on tubular legs

• Cuffs – circular cuff attachment on shirts and jackets

• Men's suits and suit-dresses – seam construction requiring clean chain stitches

• Shirts – side seams and sleeve seams

• Work suits and uniforms – durable seams for industrial garments

• Jeans – heavy-duty lap seaming on denim

• Tents and outdoor products – strong, weather-resistant seams

• Raincoats – sealed and elastic seams for waterproof garments

• Filter bags and technical textiles – cylindrical parts requiring precise chain stitching

The cantilever cylindrical structure makes it especially suitable for sewing closed tubular sections that cannot be handled by flat-bed machines.

Key Features

1. Cantilever Tubular Structure

The special cantilever tubular design is especially suitable for sleeves, trousers, and similar caliber items requiring joint sewing. The narrow cylinder arm allows tubular fabric sections to be slipped directly onto the machine, enabling continuous circular stitching without repositioning.

2. Externally Equipped Up-Down Puller System

The machine can be externally equipped with an up-down puller system, enhancing feeding capability and ensuring even fabric movement. This is particularly useful for thick or slippery materials where standard feed dogs alone may not provide sufficient grip.

3. Wide Range of Suitable Materials

The DT 927 is suitable for:

• Men's suits and suit-dresses

• Shirts

• Work suits and uniforms

• Jeans

• Tents

• Raincoats

• Filter bags and other technical textiles

It performs especially well on jeans, filter bags, and similar medium to heavy materials.

4. Independent Looper Design

The looper of the machine is independent, making it easy to adjust. This design simplifies maintenance and allows precise control of stitch formation. The needle movement is driven by the feed dog, ensuring consistent and reliable stitching.

5. Special Cantilever Cylindrical Structure

The cantilever cylindrical structure is especially suitable for lap sewing of sleeves, pants, and other cylindrical parts. It is also suitable for thin materials, providing versatility across different fabric weights.

6. Upgraded Chain Sewing Method

After thorough improvement of the chain sewing method, the machine achieves low tension of needle thread and bottom line. This reduces thread breakage and ensures smooth, consistent seam formation even at high speeds.

7. Improved Adjustment Mechanism for Beautiful Stitches

Through the adjustment mechanism of the line and bending needle and other positioning parts, wrinkle is greatly reduced or eliminated, obtaining a beautiful stitch. This results in high-quality seams with no puckering, even on difficult fabrics.

Common Questions

1. What type of machine is the DT 927 Double Needle Feed-off-the-arm Chain stitch Sewing Machine?

The DT 927 is a double needle feed-off-the-arm chain stitch machine, also known as a cylinder bed interlock machine or crank arm machine. It features a cantilevered cylinder arm structure specifically designed for lap seaming of tubular parts such as cuffs and trouser legs.

The model 927 is a classic machine widely used in sewing various fabrics including men's wear, women's wear, shirts, uniforms, casual pants, jeans, and rainwear. Its double needle configuration produces strong, elastic chain stitches suitable for stress areas.

2. What are the core advantages of this machine?

The DT 927 offers several core advantages:

1. Cylinder arm structure: Cantilevered cylinder design, especially suitable for lap seaming of tubular parts like cuffs and trouser legs.

2. Double needle chain stitch: Forms a 2-needle 4-thread chain stitch, both elastic and strong, suitable for stress areas that require durability and stretch.

3. High speed: Maximum sewing speed up to 4000 SPM, providing high production efficiency.

4. Wide application range: Handles light to medium-heavy materials, such as shirts, casual pants, jeans, and rainwear.

5. Easy operation: Manual control, simple maintenance, and durable construction ensure long-term reliability.

6. External puller optional: Some models can be equipped with an external upper/lower puller device for enhanced feeding on difficult fabrics.

These advantages make the DT 927 a versatile and cost-effective choice for garment manufacturers.

3. What is the difference between chain stitch and lockstitch on this machine?

The DT 927 produces a chain stitch (specifically a double needle 4-thread chain stitch), which is different from a lockstitch in several ways:

• Elasticity: Chain stitch has inherent stretch, making it ideal for knit fabrics and areas that require flexibility.

• Strength: The interlocking loop structure provides high seam strength, suitable for stress points.

• Thread consumption: Chain stitch uses more thread than lockstitch, but the seam is more durable and less likely to unravel.

• Appearance: Chain stitch produces a distinctive double row of stitching on the face side and a looped underside.

The upgraded chain sewing method on the DT 927 achieves low thread tension, reducing thread breakage and improving seam quality.

4. Can this machine sew both thin and thick materials?

Yes. The DT 927 is designed to handle a wide range of fabric weights, from light materials like shirt fabric to medium-heavy materials like denim and canvas. The independent looper and adjustable feed system ensure consistent stitch quality across different thicknesses.

For very thick or multi-layer materials, the optional external puller system can be added to improve feeding and prevent seam shifting.

DT 927 Specifications at a Glance

• double needle feed-off-the-arm machine

• cylinder bed chain stitch machine

• cantilever tubular sewing machine

• DT 927 chain stitch machine

• feed-off-the-arm interlock machine

• double needle chain stitch sewing machine

• sleeve and trouser lap seaming machine

• industrial chain stitch cylinder bed machine