Jeremywell Rotary Cutter Slip Clutch 1-3/8'' Smooth Shear Bolt Both Ends to Your PTO Shaft

What It Is

The Jeremywell Rotary Cutter Slip Clutch is an aftermarket PTO driveline component designed to protect your tractor and rotary cutter from shock loads during heavy brush or mowing. It uses a 1-3/8” smooth spline bore on both ends to attach directly to your existing PTO shaft, and it slips under overload to prevent drivetrain damage.

Fitment & Compatibility

• Spline size: 1-3/8” diameter, smooth bore (not splined). This fits most standard Category 1 and 2 PTO shafts, but confirm your shaft ends match—measure the outer diameter of your PTO stub and the gearbox input.
• Shear bolt pattern: The clutch uses a shear bolt on each end to secure to your PTO shaft. Check that your shaft has a matching hole for the bolt (typically 5/16” or 3/8”).
• Deck size & mower type: Works with most rotary cutters (brush hogs, finish mowers) from 4 to 8 feet. Not for zero-turn or walk-behind mowers.
• OEM vs aftermarket: This is a universal replacement. It may not match OEM bolt patterns on some older or compact tractor models—verify your PTO shaft length and yoke spacing.

Key Things to Know

• Installation difficulty: Moderate. You’ll need to remove your current slip clutch or yoke, align the shear bolt holes, and torque the bolts to spec. No special tools required, but a torque wrench helps.
• Shear bolt strength: Use only the specified shear bolts (often grade 2 or 5) to ensure the clutch slips at the right torque. Using stronger bolts can damage your gearbox or PTO.
• Smooth bore vs splined: This clutch has a smooth bore, so it won’t lock onto a splined shaft without the shear bolt. If your shaft is splined, you’ll need an adapter or a different clutch.
• Maintenance: Check the friction discs and spring tension annually. If the clutch slips too easily or not at all, adjust or replace the discs.

Should You Buy It

Buy the Jeremywell Slip Clutch if you have a standard 1-3/8” PTO shaft and need a budget-friendly, reliable overload protector for a rotary cutter up to 8 feet. It’s a solid aftermarket option for compact tractors and small to mid-size implements, but skip it if your shaft is splined or you need an exact OEM replacement—measure twice, buy once.