Double Needle Post Bed Walking Foot Heavy Duty Roller Feed Sewing Machine Model: MC9920

The MC9920 is designed for heavy materials and bulky items — leather goods (bags, jackets), upholstery, canvas (tents, awnings), heavy fabric crafts, and custom apparel that require robust stitching and even feeding.

Model: MC9920; Type: Post bed walking foot; Feeding mechanism: heavy-duty roller feed; Needle type: double needle; Maximum stitch length: 5 mm; Weight: approximately 100 lbs.

Double needle means the machine can accommodate two needles side-by-side for parallel stitching. This allows for double top-stitching, decorative twin seams, and stronger parallel seams commonly used in upholstery, leatherwork, and baggage construction.

The walking foot advances the top fabric layers in sync with the lower feed, while the roller feed provides positive traction underneath. Together they give even, controlled feeding of multiple layers and slippery or thick materials, preventing shifting and puckering.

The post bed raises the machine head above the work surface and provides clearance around the needle area, making it easier to sew cylindrical, irregular or three-dimensional items like boots, sleeves, bags, and other bulky components.

Use heavy-duty/industrial needles designed for leather, denim or heavy fabrics. Common sizes for heavy work are in the higher range (e.g., leather/denim sizes 16–23), but always match needle size to material and thread. Use strong threads such as bonded nylon, polyester, or upholstery thread for best results.

Maximum stitch length is 5 mm. Stitch length is adjustable — consult the machine's manual for the exact lever or dial location and step-by-step instructions on setting stitch length safely while the machine is stopped.

Heavy-duty machines commonly use industrial-size bobbins and appropriate bobbin cases. For model-specific bobbin type, capacity and part numbers, refer to the MC9920 manual or contact the supplier to ensure compatibility.

Because the machine weighs approximately 100 lbs, mount it on a sturdy industrial sewing table or heavy-duty cabinet designed for industrial heads. A stable table reduces vibration and provides a secure workspace for bulky projects.

Regular maintenance includes cleaning lint and debris from the feed area and bobbin case, checking and changing needles as needed, lubricating moving parts per the manual, inspecting the walking foot/roller feed, and periodic professional service for timing or major adjustments.

Follow the lubrication schedule in the user manual. Use sewing machine/industrial machine oil recommended by the manufacturer. Frequency depends on usage: heavy daily use may require daily or weekly oiling of designated points; light use requires less frequent oiling.

Common issues include skipped stitches (check needle type/condition and installation), uneven feeding (inspect roller feed and walking foot for wear or debris), thread breakage (check thread path, tension, and thread quality), and tension problems (re-adjust upper and bobbin tension). If problems persist, consult a qualified technician or the manual.

Walking foot and roller feed are built into the design. Additional presser feet and specialized attachments (edge guides, binder feet, hemmers, and various industrial accessories) are often available — check the parts/accessories list in the MC9920 manual or contact the supplier for compatible items.

Power and maximum sewing speed depend on the specific motor and electrical configuration supplied with the machine. Refer to the machine nameplate or the user manual for voltage, motor horsepower, and recommended speed limits. For production settings, follow manufacturer recommendations to avoid overloading.

For genuine replacement parts, servicing, and warranty information, contact the seller, authorized distributors, or the manufacturer's service network. Keep your model number (MC9920) and purchase details available when requesting support.