Reviews
Reviews
Jumbo Bobbin
A high-capacity metal bobbin designed to keep your sewing and embroidery projects running longer with fewer interruptions.
The Janome Jumbo Bobbin is built for select Janome machines that use a larger-capacity bobbin system. It holds approximately 40% more thread than a traditional L-size bobbin, helping reduce bobbin changes during long embroidery sessions, production sewing, and detail-heavy projects.
- 40% more thread capacity for fewer stops and starts
- Metal construction for dependable performance
- Great for longer runs of embroidery and sewing
- Perfect to keep extras on hand as ready-to-use backups
Why You’ll Love It
- Designed for machines that use the Janome jumbo bobbin system
- Helps you stitch longer before needing to rewind
- Useful for embroidery work where continuous stitching matters
- Ideal for keeping pre-wound backups ready while you work
Compatible Models
- MB-4S
- MB-7
- HD9 Professional
- HD9BE
Product Details
- Accessory Type: Jumbo metal bobbin
- Part Number: 770591001
- Use Case: Sewing and embroidery applications that benefit from increased bobbin capacity
- Material: Metal
Best For
This bobbin is an excellent choice for makers who want smoother workflow on larger projects. With more thread on each bobbin, you can spend less time stopping to rewind and more time focused on clean, uninterrupted stitching.
Product Images
Product Warranty InformationAt Authorized Vac and Sew, we stand behind the quality of the products we sell. Every sewing machine purchased from us comes with a 1-year warranty covering all parts and labor through Authorized Vac and Sew for added peace of mind. Extended warranty options are also available for select models.Below, you’ll find warranty details for various product categories. If you have any questions about warranty coverage or would like to explore extended warranty options, please contact us at (559) 439-2560 or email us at Customerservice@authorizedvacandsew.comManufacturer WarrantiesMost products sold by Authorized Vac and Sew are covered by the original manufacturer’s warranty. Warranty terms vary by brand and product type. Below is a general guide to what is typically covered:Sewing Machines & Embroidery Machines
- Bernina: Up to 20-year limited warranty (parts), 5-year electrical, 2-year labor.
- Baby Lock: Up to 25-year limited warranty (parts), 10-year electrical, 1-year labor.
- Brother: Varies by model; typically 25-year limited warranty on chassis, 5-year electrical, 1-year labor.
- Janome: Up to 25-year limited warranty (parts), 5-year electrical, 1-year labor.
- Handi Quilter: Up to 10-year limited warranty (parts), 5-year electrical, 1-year labor.
For full details on a specific brand's warranty, please refer to the manufacturer’s website or contact us for assistance.Vacuum Cleaners
- Miele: 7-year warranty on motor, 1-year on parts and labor.
- Riccar: Varies by model, typically 4-8 years on motor and 1-3 years on parts.
- Simplicity: Up to 5-year warranty on motor and parts.
Furniture & Accessories
- Arrow & Kangaroo Cabinets: 3-10 year warranty depending on the product.
- Sew Steady Tables: Limited 1-year warranty on manufacturing defects.
- AccuQuilt Cutters & Dies: 1-year warranty on defects.
What’s Not Covered?
- Normal wear and tear
- Misuse, neglect, or improper maintenance
- Damage caused by unauthorized repairs
- Commercial use of household machines (unless otherwise stated in warranty)
How to File a Warranty ClaimIf you experience an issue covered under warranty:
- Locate your purchase receipt – Proof of purchase is required.
- Contact the manufacturer – Many brands require direct warranty claims.
- Contact Authorized Vac and Sew – If you need assistance with your warranty claim, call us at (559) 439-2560 or visit our store.
Online Warranty Claims Notice
For all online warranty claims, customers must contact our store first to begin the warranty process.
Troubleshooting & Evaluation
All warranty claims will begin with phone troubleshooting conducted by our in-house service technicians. Many issues can be resolved remotely without the need to ship the machine. If our technician determines that the machine requires physical inspection or repair, the following applies:
Shipping Responsibility
• The customer is responsible for shipping the unit to our service department for inspection.
• Once the issue is confirmed to be covered under warranty, all warranty-approved parts and labor will be provided at no cost to the customer.
• After repairs are completed, we will cover the return shipping back to the customer at no additional charge.
Warranty Void Clause
Any warranty will be immediately void if the customer opens the machine housing or casing, adjusts, modifies, or tampers with internal components, attempts self-repair, or allows unauthorized service or repairs. This includes, but is not limited to, altering or adjusting electrical components, timing, tension assemblies, motors, circuit boards, or any internal mechanical parts.
Machines that show signs of tampering, unauthorized repairs, or modification will no longer qualify for warranty coverage. Any resulting repairs will be subject to standard service and labor fees.Questions or Assistance
If you have questions about your warranty or believe your machine may require service, please contact us before taking any action. Our team is happy to guide you through the proper warranty process.
Agreement
By purchasing online, you acknowledge and agree to these warranty terms and conditions and understand that failure to follow the outlined warranty procedures may result in denial of warranty coverage.
For extended service options or repairs beyond the warranty period, we offer professional servicing to keep your machine running smoothly.

