BERNINA CB Hook Bobbin Case for Sewing and Embroidery

The BERNINA CB Hook Bobbin Case is a genuine BERNINA replacement and spare bobbin case designed for machines equipped with the CB (Central Bobbin) hook system. Whether you are sewing utility stitches, decorative stitches, or running embroidery projects, this bobbin case ensures consistent thread tension and smooth stitch formation — exactly as your machine was engineered to perform.

Key Features

• Designed specifically for BERNINA machines equipped with the CB hook system.
• Compatible with both sewing and embroidery applications.
• Supports stitch widths of up to 5.5 mm, accommodating a full range of utility and decorative stitches.
• Genuine BERNINA part, manufactured to the same tolerances as the original case supplied with your machine.
• Provides reliable, consistent bobbin thread tension for professional stitch quality.
• Ideal as a spare bobbin case for thread color changes during embroidery or multi-color sewing projects.
• Compatible with a wide range of BERNINA activa, 3 Series, virtuosa, aurora, artista, and select 500 Series machines.

Specifications

The BERNINA CB Hook Bobbin Case is a practical and essential addition for any BERNINA owner who wants a reliable spare on hand, or who needs to replace a worn or damaged case to restore optimal machine performance. OSP Machines is an authorized dealer and provides free support for the life of your machine. Reach out to the OSP Machines team any time you have questions about installation, tension adjustment, or compatibility — we are here to help for as long as you own your machine.

CB-hook Bobbins and Bobbin Cases are required for the following machines: 

• For all BERNINA activa and 3 Series machines
• BERNINA virtuosa
• BERNINA aurora
• BERNINA artista 165, 170 and 630
• BERNINA 555 and 570

Frequently Asked Questions

Which BERNINA machines is this bobbin case compatible with?

This bobbin case is designed for BERNINA machines equipped with the CB (Central Bobbin) hook system. Compatible models include all BERNINA activa and 3 Series machines, BERNINA virtuosa, BERNINA aurora, BERNINA artista 165, 170, and 630, as well as the BERNINA 555 and 570. If you are unsure whether your machine uses the CB hook, the OSP Machines support team is happy to help you confirm before purchasing.

What is the difference between the CB hook and other BERNINA hook systems?

BERNINA uses several different hook systems across its machine lineup, and each requires its own specific bobbin and bobbin case. The CB (Central Bobbin) hook is found on many mid-range BERNINA models and is optimized for stitches up to 5.5 mm wide, covering the full range of utility and decorative sewing as well as embroidery. Other BERNINA hook types — such as the large hook used on newer 5, 7, and 9 Series machines — are not compatible with this bobbin case.

Can I use this bobbin case for embroidery as well as regular sewing?

Yes. This BERNINA CB Hook Bobbin Case is designed for both sewing and embroidery use on compatible machines. Many embroiderers keep a second bobbin case pre-wound with embroidery bobbin thread so they can switch quickly between projects without re-threading.

Is this a genuine BERNINA part?

Yes, this is a genuine BERNINA accessory, not an aftermarket or third-party part. Using genuine BERNINA parts helps ensure proper fit, correct thread tension, and long-term reliability for your machine.

What warranty and support come with this purchase?

OSP Machines is an authorized BERNINA dealer. OSP Machines is an authorized dealer and provides free support for the life of your machine. If you have any questions about installation, tension settings, or compatibility, the OSP Machines support team is available to assist you at no charge for as long as you own your machine.