WK747 4-Thread Overlock Sewing Machine

The WK747 is a high-speed 4-thread overlock machine designed for overlocking and overedging workpieces made from light to medium-thickness materials.

Key features include low sewing tension for neat stitches at high speed, automatic lubrication for stable running, and excellent overall performance for finishing edges.

Stitch length: 4 mm; stitch width: 3.6 mm; differential feed ratio range: 0.7–2 (as listed); maximum sewing speed: 6500 rpm; package dimensions: 470 × 330 × 480 mm; weight: listed as 34/32 (as provided).

'4-thread' indicates the machine uses four threads to form a secure overlock stitch, commonly used for overlocking and overedging seams and finishing raw edges with stretch and durability.

The WK747 is suitable for light to medium-weight fabrics, including knits and woven materials typical of apparel and home textiles that require neat edge finishing.

The machine's maximum sewing speed is specified at 6500 revolutions per minute (rpm), enabling high-speed production when properly adjusted.

The auto-lubrication system supplies oil to critical moving parts for smoother, more stable running. Regular checks and refilling of the oil reservoir per the manufacturer’s schedule (typically daily or weekly depending on use) and periodic full servicing are recommended.

Ensure correct threading of loopers and needles, set appropriate thread tensions, use the right needle and thread for the fabric, keep the machine clean and well-lubricated, and perform a few test runs before production.

Check and re-thread the machine (needles and loopers), replace bent or worn needles, verify thread tension settings, clean lint from feed and loopers, ensure proper lubrication, and confirm the correct needle size and type for the fabric.

Stitch length is set via the machine’s stitch-length control (up to 4 mm for WK747). Stitch width is determined by the presser foot position and fabric edge guide; consult the machine manual for exact adjustment instructions.

Regular maintenance includes cleaning lint and thread debris, checking/ refilling the lubricant reservoir, inspecting and replacing needles, checking tensions and threading, and having periodic professional servicing for timing and internal adjustments.

The listed package dimensions are 470 × 330 × 480 mm. The weight is provided as 34/32 (as listed); verify with the seller whether this refers to net/gross weight.

Included accessories may vary by seller or package. For specific included items and genuine spare parts (needles, loopers, presser feet, etc.), contact the seller or manufacturer directly.

Request the user manual and setup instructions from your retailer or the manufacturer. Many suppliers provide PDF manuals, threading diagrams, and setup videos on request or via their website.

Contact the seller or the machine manufacturer for warranty registration, authorized service centers, and technical support. Keep your purchase records and serial number available when you call.