Lower Shaft Hook Drive Gear for Usha Janome & Janome Sewing Machines

Restore smooth and accurate stitching with this Lower Shaft Hook Drive Gear for Usha Janome Sewing Machines. Designed as a direct replacement for Part No. 730038001 and 730038006, this precision-machined bevel gear transfers power from the lower shaft to the hook assembly, helping maintain correct hook timing and consistent stitch formation.

A worn or damaged lower shaft gear can cause skipped stitches, thread bunching, noisy operation, and failure to pick up the bobbin thread. Replacing it with this OEM-compatible gear restores smooth rotary hook movement and reliable sewing performance.

Please verify the shape, part number, and dimensions of your existing gear before purchasing.

Key Features

Precision Gear Tooth Design

The accurately molded bevel gear teeth mesh smoothly with the hook drive shaft, reducing backlash, slipping, excessive vibration, and operating noise.

Restores Hook Timing

Designed to help restore proper synchronization between the needle and rotary hook, reducing skipped stitches, uneven stitch formation, and thread looping problems caused by worn gears.

Heavy-Duty Polymer Construction

Manufactured from a durable high-density engineering polymer that withstands continuous rotation, friction, and normal sewing machine operating temperatures.

OEM-Compatible Fit

Produced to match the original dimensions of Part No. 730038001 / 730038006, allowing direct replacement without modifying your sewing machine.

Reliable Power Transmission

Transfers rotational force efficiently from the lower shaft to the hook assembly for smoother machine operation and consistent fabric feeding.

Compatible Sewing Machines

Usha Janome

• Stitch Queen
• Stitch Magic
• Old Fashion Stitch

Janome

104, 105, 106, 108, 110, 203, 300, 303, 344, 345, 352, 353, 360, 370, 372, 373, 380, 381, 405, 415, 419S, 423S, 1612, 1622, 1814, 1818, 1822, 4612 Travel Mate, HD1000, JD1814, JD1818, JD1822, L-108, L-344, L352, L-353, L-372, L-373, L-392, L-393, LR1612, NH1612, NH1622, RX18, RX18S, RX22, S-950 and TB-12.

Compatible Part Numbers

• 730038001
• 730038006

Best Fabric Types

When installed correctly and the machine timing is properly adjusted, this replacement gear supports smooth stitching on:

• Cotton
• Denim
• Polyester
• Silk
• Linen
• Rayon
• Canvas
• Knits
• Quilting fabrics
• Multiple fabric layers

The gear itself is not fabric-specific; it restores the hook drive system that enables consistent stitch formation across different fabric types.

Why Replace the Lower Shaft Hook Drive Gear?

Over time, the factory-installed hook drive gear can wear, crack, or lose teeth. This affects the relationship between the needle and rotary hook, resulting in:

• Skipped stitches
• Bobbin thread not catching
• Thread bunching underneath fabric
• Excessive gear noise
• Rough handwheel rotation
• Poor stitch consistency

Replacing the damaged gear helps restore smooth hook movement and reliable sewing performance.

Ideal For

• Home sewing machine repairs
• Sewing machine service technicians
• Tailoring shops
• Boutique owners
• Sewing machine maintenance
• Preventive replacement of worn hook gears

Installation Guide

1. Disconnect the sewing machine from the power supply.
2. Open the machine to access the lower shaft assembly.
3. Remove the damaged hook drive gear.
4. Install the new lower shaft gear in the correct orientation.
5. Align the hook timing according to the service manual.
6. Tighten all retaining screws securely.
7. Rotate the handwheel manually to ensure smooth movement.
8. Test sew on scrap fabric before regular use.

Professional installation is recommended if hook timing adjustment is required.

Frequently Asked Questions

Is this gear compatible with all Usha Janome sewing machines?

No. It fits only the compatible models listed in this description or machines using Part No. 730038001 or 730038006. Always verify your existing part before ordering.

What does the lower shaft hook drive gear do?

It transfers rotational movement from the lower shaft to the rotary hook, ensuring proper hook timing for accurate stitch formation and reliable bobbin thread pickup.

What are the signs of a damaged hook drive gear?

Common symptoms include skipped stitches, thread bunching, noisy gear operation, broken gear teeth, rough handwheel movement, and failure to catch the bobbin thread.

Does this fit Janome HD1000?

Yes. It is compatible with the Janome HD1000 and other listed models using the same part number.

Can I install this gear myself?

Yes, if you have experience servicing sewing machines. However, because hook timing may need adjustment, professional installation is recommended for best results.

Is this an OEM replacement?

This is a precision replacement manufactured to OEM-compatible dimensions for Part No. 730038001 / 730038006.

Machine Compatibility Table