Yao Han F300A bag Closer

The Yao Han F300A is a hand-held, commercial-grade portable bag closer designed for sealing a wide variety of bags, including plastic bags, woven polypropylene bags, jute bags, multi-wall paper bags, and composite bags. It is a single-thread, plain-sew machine built for industrial packaging environments where mobility and ease of use are essential.

Key Features

1. Portable Industrial Design

• Lightweight hand-held sewing head for easy operation.

• Powered by a strong motor designed for frequent start/stop use, ideal for bag closing operations.

• Supports 110V or 220V configurations depending on order.

2. Sewing Capabilities

• Produces a single-thread chain stitch, suitable for securing filled bags.

• Automatic feed mechanism pulls the bag through—operator should not pull the bag manually.

• Built-in thread cutting knife trims the chain at the end of the seam.

• Standard stitch length factory-set at approx. 3.75 stitches per inch.

3. Threading & Tension

• Works with Yao Han industrial sewing thread.

• Thread must be installed securely with correct tension to avoid loose stitches, thread breaks, or skipped stitches.

• Includes tension disks, eyelets, and proper threading path for consistent stitch formation.

4. Lubrication System

• Equipped with a manual oiling system and visible oil reservoir.

• Uses Yao Han #22 Tellus Oil.

• Oil pump must be pressed every 4 hours of operation to lubricate moving parts.

Operation Summary

Before Starting

Checklist includes:

• Ensure all screws are tight.

• Fill oil reservoir and pump oil 4×.

• Confirm correct electrical connection.

• Thread machine correctly and create a thread chain.

• Clear debris and ensure operator safety (no loose clothing, hair tied, etc.).

Sewing Bags

• Insert bag top under presser foot.

• Hold machine with right hand; press start switch.

• Machine automatically feeds material and forms the stitch.

• Stitch 2–3 inches off the bag edge, then run chain through the knife slot to cut.

Maintenance

Routine Daily Checks

• Clean off dust and debris.

• Refill oil reservoir and wipe excess oil.

• Check that all screws remain tight.

Motor Care

• Inspect carbon brushes regularly; replace when under 6 mm length.

Components That Require Periodic Replacement

• Feed dog (when teeth are worn, stitch shortens).

• Throat plate (if teeth wear down).

• Thread knife blades (when cuts become torn instead of clean).

• Needle (if bent, dull, or causing skipped stitches).

Thread, Stitch & Bag Issues

Troubleshooting covers:

• Loose stitches (check tension, feed dog sharpness).

• Skipped stitches (check looper & needle alignment).

• Thread breakage (tension, thread quality, guide cleanliness).

• Bag tearing (presser foot force, feed rate consistency).

Safety Guidelines

• Machine contains pinch points, sharp edges, and a high-speed motor—operator must understand its operation.

• Wear proper safety gear (eye protection).

• Not suitable for use near flammable or explosive materials.

• Keep hair, clothing, and hands clear of moving components.