DT 63900 Computerized trousers bottom hemming machine

The DT 63900 is a computerized automatic trousers bottom hemming machine specifically designed for one-step hemming of trouser legs on dress pants, jeans, casual trousers, workwear, and everyday wear. It integrates automatic hem folding, feeding, sewing, thread trimming, and presser foot lifting into one seamless process, significantly improving the efficiency and quality of hemming operations.

This machine is ideal for garment manufacturers seeking to reduce manual labor, improve hem consistency, and increase throughput in trouser production lines.

Applications

The DT 63900 is widely used in trouser and pants manufacturing for:

• Dress pants – clean, professional bottom hems

• Jeans – durable hemming on denim

• Casual trousers – everyday wear with consistent hem width

• Workwear – heavy-duty fabrics requiring reliable feeding

• Uniforms – mass production with identical hem specifications

Its cylinder bed design makes it especially suitable for sewing tubular trouser legs, allowing operators to slip the garment directly onto the machine for fast, continuous hemming.

Key Features

1. Interchange Between Lockstitch and Chainstitch

The DT 63900 realizes two different stitches by changing the hook and looper. This flexibility allows manufacturers to meet the needs of different processes without investing in separate machines.

• Lockstitch – strong, secure seam suitable for most trouser hemming

• Chainstitch – stretchable seam ideal for knit or elastic fabrics

This interchangeability extends the machine's application range and provides greater production flexibility.

2. Cylinder Bed Design

The cylinder bed is more suitable for sewing hemming on trousers. Its rounded, narrow profile allows tubular trouser legs to be easily loaded and rotated during sewing, reducing handling time and improving stitch consistency around the hem.

3. Synchronous Feeding

The machine features up-down puller and needle feeding that work together to prevent dense stitch formation on joints. This synchronous feeding system ensures:

• Even fabric feed regardless of thickness

• No shifting or puckering at seams

• Smooth transition over multiple fabric layers

• Consistent stitch length throughout the hem

4. Automation Functions

The DT 63900 comes standard with several automation features that reduce operator workload and improve productivity:

• Automatic presser foot lifter

• Automatic thread trimmer

• Draw thread function

• Roll hemming automation

These functions allow for faster cycle times and easier operation, even for less experienced workers.

5. Reinforce Function

The machine includes a dense stitch function when ending to prevent off-line (thread unraveling). This reinforcement stitch at the end of each hem ensures a secure finish and reduces the risk of seams opening during wear or washing.

6. Independent Dual Wheel

The upper and lower wheels are independently adjustable, allowing precise control over feeding tension and pressure. This is particularly useful when sewing fabrics with different surface characteristics or thicknesses.

7. Triple-Zone Heating (Optional/Advanced Configuration)

For special hemming processes that require heat setting or adhesive activation, the machine can be equipped with triple-zone heating with independent temperature control per zone. This ensures consistent heat distribution and prevents overheating or underheating of the fabric.

8. Smart Blade Sync (Optional/Advanced Configuration)

The smart blade synchronization system offers auto or manual speed adjustment, ensuring that any cutting or trimming blade operates in perfect harmony with the sewing speed. This results in clean, precise cuts without damaging the fabric.

9. Dual Roller Modes

The machine provides stepless and stepped options for roller operation. Stepless mode allows continuous fine adjustment, while stepped mode provides preset increments for repeatable settings. This flexibility helps optimize feeding for different fabric types.

10. Straight/Curve Capable

The DT 63900 is capable of handling both straight and curved hems with precise adhesive trimming. This feature is especially useful for styles that require curved or shaped bottom hems, not just straight cuts.

11. Front Blade (Budding)

For special processes, a front blade (budding) can cut first before sewing. This pre-cutting function is useful for certain hemming techniques where the fabric edge needs to be trimmed before folding and stitching, ensuring a clean finished edge.

Common Questions

1. What type of machine is the DT 63900 Computerized Trousers Bottom Hemming Machine?

The DT 63900 is a computerized automatic trousers bottom hemming machine, specifically designed for one-step hemming of trouser legs on dress pants, jeans, casual trousers, workwear, and everyday wear.

It integrates automatic hem folding, feeding, sewing, thread trimming, and presser foot lifting into one process, significantly improving the efficiency and quality of hemming operations. Operators simply load the trouser leg onto the cylinder bed and start the cycle; the machine handles the rest.

2. What are the core advantages of this machine?

The DT 63900 offers several core advantages:

1. Automatic Hem Folding: Equipped with an automatic opening/closing hemming cylinder, with a fixed hem width of 12.7mm (1/2 inch), ensuring consistent hem width on every piece.

2. Cylinder Bed Design: A 200mm (approx. 7.9 inch) circumference cylinder bed makes it easy to slip trouser legs onto the machine, reducing handling time.

3. Automatic Auxiliary Functions: Standard with automatic thread trimming, automatic presser foot lifting, and automatic cylinder opening/closing, greatly improving operational efficiency.

4. Synchronous Upper/Lower Feed: Features upper and lower puller mechanisms behind the needle for synchronized continuous feeding, ensuring even fabric feed regardless of thickness.

5. Wide Applicability: Suitable for sewing dress pants, jeans, casual trousers, workwear, and everyday wear.

These advantages translate into higher productivity, consistent quality, and lower labor costs.

3. How does the machine achieve automatic hemming?

The DT 63900 uses a mechanical automatic hemming cylinder to achieve fully automatic hemming:

1. Cylinder opening/closing: After starting, the cylinder automatically opens, folding the trouser leg edge to the set width (12.7mm / 1/2 inch).

2. Synchronous feeding: Upper and lower pullers behind the needle provide synchronized continuous feeding, ensuring even hemming without shifting.

3. Sewing: The selected stitch type (lockstitch or chainstitch) completes the hemming.

4. Automatic trimming + presser foot lift: After completion, the machine automatically trims threads, lifts the presser foot, and opens the cylinder for easy removal.

The entire process requires no manual folding assistance, allowing even beginners to operate the machine effectively.

4. Can the machine switch between lockstitch and chainstitch?

Yes. The DT 63900 is designed for interchangeable lockstitch and chainstitch operation. By changing the hook and looper, operators can switch between stitch types to suit different fabrics and process requirements.

This flexibility is especially valuable for manufacturers producing both woven and knit trousers, as chainstitch provides stretch for knit fabrics while lockstitch offers a secure, non-stretch seam for woven materials.

5. What maintenance is required for the DT 63900?

The DT 63900 is built for durability and low maintenance. Key maintenance points include:

• Regular cleaning of the hook and looper area

• Lubrication according to the manufacturer's schedule

• Periodic inspection of the synchronous feeding mechanism

• Checking the automatic hemming cylinder for smooth operation

Because of its modular design and high-quality components, the machine requires minimal daily maintenance while delivering long-term reliable performance.

DT 63900 Specifications at a Glance

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