Williams & Hussey Constant Feed Molder Gearbox Repair Service

Professional Gearbox Repair for Constant Feed Molders

Get your gearbox professionally rebuilt by factory-trained technicians using genuine Williams & Hussey parts. The repair includes inspection, part replacement, testing, and a 1 year limited warranty.

Need help identifying your gearbox? Learn more

$680.00

Gearboxes to service

Please allow us 24 - 48 hours to review your information.

How the Repair Process Works

1. Purchase this service through our website.

2. We'll send you Return Merchandise Authorization (RMA) instructions.

3. Ship your gearbox to our repair facility.

4. Once complete within 7-10 days, we'll return your gearbox fully rebuilt and ready to reinstall.

Overview

Many woodworkers feel confident repairing their Williams & Hussey gearbox independently—and we support that. We carry all the genuine parts you need to make your repairs, including gears, bearings, bushings, and gaskets. If you’re comfortable doing the work, you can order parts directly from us and get your molder back up and running.

However, if the repair feels out of reach or you want peace of mind, you can send your gearbox to our team for a complete factory rebuild. Our trained technicians will disassemble, inspect, and rebuild your gearbox to OEM standards using authentic Williams & Hussey parts. It’s a convenient, worry-free way to restore your molder’s performance.

What's Included:

Internal gear inspection and replacement
New bearings, bushings, and gaskets
Complete cleaning, reassembly, and lubrication
Functional testing and alignment
1-Year Limited Warranty on parts and labor

Watch: How to Remove the Gearbox from Your Molder

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Why Choose Factory Repair?

When you send your gearbox to Williams & Hussey for repair, you get more than just a quick fix. You are getting the assurance of expert service and factory-quality results.

OEM-Spec Components Only

We use genuine Williams & Hussey parts for a proper fit, performance, and longevity.

Expert Repair by Factory-Trained Technicians

Our team knows your molder inside and out and rebuilds every unit to its original specifications.

Fully Bench-Tested

Before we ship it back, your gearbox is thoroughly tested to confirm smooth operation and proper alignment.

1-Year Warranty

Every repair includes a 1-year limited warranty on parts and labor for added peace of mind.

Why It's Important to Know the Feed Rate of Your Constant Speed Molder

Ensures Proper Operation

If sprockets or chains are worn out, mismatched, or incorrectly installed, your feed system may slip, bind, or fail. These issues cause inconsistent cuts or damage to the molder.

Prevents Damage to Raised Panels

Some profiles (like raised panels) require slower feed rates to avoid rubbing or scarring. Using the correct gearbox or upgrade kit prevents these issues.

Makes Repairs & Upgrades Easier

Understanding what parts your gearbox uses helps you order the correct replacements and guarantees compatibility with upgrades.

Supports Troubleshooting

When contacting support, knowing whether you have a 15 FPM, 11 FPM, or a raised panel kit helps us diagnose issues quickly and correctly.

How to Identify Your Gearbox Speed

Older Williams & Hussey molders use a constant feed gearbox to control how fast wood feeds through the machine. This feed rate directly affects the quality of your cuts and how your machine performs with different types of profiles. Whether running standard trim or complex raised panels, knowing your feed system is essential for accuracy, safety, and efficiency.

You can identify your gearbox by checking the sprocket tooth count and chain pitch. These determine the feed rate your machine is set to.

11 Feet Per Minute Gearbox – P-511 REV A

This version provides a slower 11 FPM feed rate. It's useful when working with harder woods or more detailed profiles where slower feed speeds reduce tear-out.

Components:

(1) P-155: Infeed Chain, #25, 30-pitch (short)
(1) P-156: Outfeed Chain, #25, 56-pitch (long)
(2) P-150: 12-Tooth Drive Sprockets (inside chain guard)
(2) P-111: 15-Tooth Feed Roll Sprockets (one on each feed roll)

View P-511 REV A schematic

15 Feet Per Minute Gearbox – P-511

This is the standard gearbox for many Williams & Hussey molders. It delivers a constant feed rate of 15 FPM.

Components:

(1) P-112: Infeed Chain, #25, 32-pitch (short)
(1) P-212: Outfeed Chain, #25, 58-pitch (long)
(2) P-110: 16-Tooth Drive Sprockets (inside chain guard)
(2) P-111: 15-Tooth Feed Roll Sprockets (one on each feed roll)

View P-511 schematic

Raised Panel Kit – For 15 FPM Machines Only

If you're molding raised panel doors and your machine has the 15 FPM gearbox, you may need the Raised Panel Kit. The original chains sometimes rub against the raised section of the panel. This kit includes smaller sprockets and adjusted chain lengths to solve that issue.

Note: This kit is not needed if you already have the 11 FPM gearbox.

Components:

(1) P-155: Infeed Chain, #25, 30-pitch (short)
(1) P-156: Outfeed Chain, #25, 56-pitch (long)
(2) P-153: 14-Tooth Drive Sprockets (inside chain guard)
(2) P-152: 13-Tooth Feed Roll Sprockets (one on each feed roll)

View P-511 schematic

Unsure If Your Molder Can Be Repaired?

No question is too small. When in doubt give us a call. From vintage to current molders, troubleshooting, upgrades, and profile knife solutions, we are here to assist you.

Williams & Hussey Constant Feed Molder Gearbox Repair Service

Williams & Hussey Constant Feed Molder Gearbox Repair Service

Professional Gearbox Repair for Constant Feed Molders

Overview

What's Included:

Watch: How to Remove the Gearbox from Your Molder

Why Choose Factory Repair?

OEM-Spec Components Only

Expert Repair by Factory-Trained Technicians

Fully Bench-Tested

1-Year Warranty

How to Identify Your Gearbox Speed

Prefer to fix it yourself?

Interested in upgrading your molder?