Agri-Fab 48888 Gear, Large Slot'D, 5/8-Inch ID

What It Is

The Agri-Fab 48888 is a large slotted gear with a 5/8-inch inner diameter, used to drive the spreader mechanism on tow-behind broadcast spreaders. It’s a common replacement part for Agri-Fab and similar-branded spreaders, typically found on models with a 50- to 130-pound hopper capacity.

Fitment & Compatibility

Before buying, check these three things:

• Shaft diameter: The 5/8-inch ID must match your spreader’s drive shaft. Measure with a caliper—don’t guess.
• Slot pattern: This gear has a large slot design. Confirm your spreader uses a slotted gear (not a keyed or hex shaft). Common on Agri-Fab models like 45-0299, 45-0301, and 45-0305.
• Brand cross-reference: Works with most Agri-Fab spreaders and some Yard-Man, MTD, and Huskee models. Not compatible with newer John Deere or Scotts spreaders that use a different drive system. If in doubt, compare the gear’s outer diameter (approx. 2.5 inches) and tooth count (10 teeth) to your original.

Key Things to Know

• Quality: Molded plastic—durable enough for residential use, but may crack if overtightened or used on heavy commercial loads. Inspect the old gear for wear before swapping.
• Installation difficulty: Easy. Remove the cotter pin or clip, slide off the old gear, and press the new one onto the shaft. No special tools needed.
• Common gotcha: The slot can wear oblong over time, causing uneven spreading. If your spreader is skipping or clumping, this gear is likely the culprit.
• Lubrication: A dab of grease on the shaft helps prevent future wear—don’t skip this step.

Should You Buy It

If your tow-behind spreader is skipping, not feeding evenly, or the gear is visibly worn, this is a no-brainer replacement at $20. It’s a solid, direct-fit fix for most Agri-Fab and compatible spreaders. Skip it if you have a non-slotted shaft or a commercial-grade unit—those need a metal gear.