Aluminum M Style Bobbin with Slot - Part 239729S - Long Arm Quilting Machines

Aluminum M Style Bobbin with Slot - Part 239729S (Long Arm Quilting Machines)

Premium aluminum bobbin designed specifically for long arm quilting machines. This M Style bobbin (Part 239729S) features a precision slot for easy spindle engagement when winding. Made from durable aluminum for smooth, consistent performance on professional long arm quilting machines. Sold individually.

Key Features:

• Aluminum Construction - Durable metal bobbin for long-lasting performance
• M Style Design - Specifically designed for long arm quilting machines
• Precision Slot - Allows easy spindle engagement when winding bobbin
• Professional Quality - Replacement bobbin for serious quilters
• Smooth Operation - Aluminum provides consistent tension and smooth thread delivery
• Sold Individually - Purchase exactly the quantity you need
• Part # 239729S - Direct replacement for this part number

What is M Style?

M Style bobbins are the standard bobbin type for long arm quilting machines. They're larger and more robust than domestic sewing machine bobbins (like Class 15), designed to hold more thread for the continuous stitching demands of long arm quilting. The "M" designation refers to the specific size and shape standardized across most long arm quilting machine manufacturers.

M Style bobbins are typically made from aluminum rather than plastic because aluminum provides better weight distribution, smoother rotation, and more consistent tension - all critical for professional quilting results.

Why Aluminum vs. Plastic?

Long arm quilting machines use aluminum bobbins instead of plastic for several important reasons:

• Durability - Aluminum withstands the high-speed operation of long arm machines
• Weight Balance - Proper weight helps maintain consistent tension
• Heat Resistance - Won't warp from friction heat during extended quilting sessions
• Smooth Rotation - Metal-on-metal contact provides smoother bobbin rotation
• Thread Capacity - Holds more thread for uninterrupted quilting
• Professional Standard - Industry standard for long arm machines

The Slot Feature:

This bobbin includes a precision slot for spindle engagement when winding. The slot allows the bobbin to lock onto the winding spindle securely, ensuring even, tight winding every time. This is especially important for long arm quilting where consistent bobbin tension is critical for professional results.

Without the slot, bobbins can slip on the spindle during winding, resulting in loose or uneven thread distribution. The slot eliminates this problem and makes bobbin winding faster and more reliable.

Fits Long Arm Quilting Machines:

• Handi Quilter - Most Handi Quilter long arm models using M Style bobbins
• Baby Lock - Jewel, Crown Jewel
• Tin Lizzie - Tin Lizzie 18
• Husqvarna Viking - Mega Quilter 18x8
• Pfaff - Grand Quilter 18x8
• Janome - Artistic Quilter
• Other Brands - Queen Quilter 18, and most other long arm machines using M Style bobbins

Note: Always verify your long arm quilting machine uses M Style bobbins before purchasing. Check your machine's manual or existing bobbins to confirm.

About Long Arm Quilting Machines:

Long arm quilting machines are professional-grade machines designed for quilting large projects efficiently. Unlike domestic sewing machines, long arm machines have an extended throat space (often 18 inches or more) that allows quilters to work on full-size quilts without constantly repositioning the fabric.

These machines require specialized bobbins like the M Style because they operate at higher speeds and for longer periods than domestic machines. The larger bobbin capacity means fewer thread changes, and the aluminum construction ensures consistent performance during extended quilting sessions.

Why Stock Extra Bobbins:

• Multiple Thread Colors - Keep different colors wound and ready
• Prevent Delays - Always have a backup when working on client quilts
• Professional Workflow - Switch between projects without rewinding
• Replace Worn Bobbins - Aluminum bobbins can develop burrs over time
• Emergency Backup - Never be caught without a bobbin mid-project

Bobbin Care for Long Arm Machines:

• Wind evenly - Use your machine's bobbin winder for smooth, even winding
• Don't overfill - Leave a small gap at the top to prevent jamming
• Check for burrs - Inspect aluminum bobbins regularly for rough edges that can snag thread
• Keep clean - Wipe off lint buildup periodically
• Store properly - Keep wound bobbins in a bobbin box to prevent thread tangling
• Match thread weight - Wind bobbins with appropriate thread for your project
• Use the slot - Always engage the slot on the winding spindle for even winding
• Replace when damaged - Don't use bobbins with dents, burrs, or damage

Perfect For:

• Professional Quilters - Reliable bobbins for client work
• Long Arm Quilting Studios - Stock up for multiple machines
• Serious Hobbyists - Quality bobbins for your long arm investment
• Quilt Shop Owners - Replacement bobbins for rental long arms
• Quilting Teachers - Keep extras on hand for students

Replacement Bobbin:

This is a quality replacement bobbin (aftermarket) that works as a direct replacement for part 239729S. It's manufactured to M Style specifications and provides reliable performance for long arm quilting machines at a more affordable price than brand-name bobbins.

Many professional quilters keep a supply of replacement bobbins on hand for everyday use, saving their original equipment bobbins as backups.

Sold Individually:

This bobbin is sold as a single unit (1 bobbin), not in multi-packs. This allows you to purchase exactly the quantity you need. Long arm quilters typically need fewer bobbins than domestic sewers because M Style bobbins hold significantly more thread.

Most long arm quilters keep 10-20 bobbins on hand - enough to have multiple thread colors ready while maintaining a backup supply.

What's Included:

1 aluminum M Style bobbin with slot (Part 239729S), compatible with most long arm quilting machines including Handi Quilter, Baby Lock Jewel & Crown Jewel, Tin Lizzie 18, Viking Mega Quilter 18x8, Pfaff Grand Quilter 18x8, Janome Artistic Quilter, and Queen Quilter 18.

Quantity: 1 bobbin (sold individually)
Part Number: 239729S
Bobbin Type: M Style
Material: Aluminum
Feature: Precision slot for spindle engagement
Application: Long arm quilting machines
Style: Replacement (aftermarket)
Compatibility: Most long arm machines using M Style bobbins
SKU: 239729S