Description
When you’re out cutting hay and your sickle bar starts leaving uncut stems or making ragged cuts, it’s time for a new knife assembly. A worn knife means longer dry times, poor bale quality, and frustrated cattle come winter. This riveted 9-foot knife gets your mower cutting clean again so you can put up quality hay when conditions are right.
What You’re Getting
- Full 9-foot knife assembly with 35 sharp cutting sections already riveted in place
- Top serrated design with fine teeth (14 per inch) for clean cuts on various hay crops
- Heavy-duty knife back that handles the side-to-side motion and cutting forces
- Riveted construction means sections stay put through tough cutting conditions
- Direct replacement that fits without modifications or special tools
Built for Real Hay Work
This knife fits a good range of hay mowers including Case IH balanced head and pin-type units, Ford 505 mowers, and New Idea 521 and 522 models. Whether you’re cutting first-crop alfalfa, mixed grass hay, or second-cutting timothy, this knife handles the variety of stems and conditions you’ll encounter during hay season.
Made to Last
Riveted sections are the tried-and-true choice for serious hay operations. Unlike bolted sections that can work loose over time, riveted sections stay locked in position through rocks, stumps, and whatever else hides in your hayfields. The knife back is built to flex with the terrain while keeping those cutting edges aligned where they need to be.
Good to Know
Installing a new knife typically involves unbolting the old assembly from the sickle head and mounting the new one with the same hardware. Keep a spare set of hold-down clips handy, and check that your guards are straight and properly spaced before you start cutting. A sharp knife in good guards makes all the difference in cut quality.


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