Riveted 9‘ Sickle Bar Knife for New Holland 451 & 456 Mowers with Under Serrated Sections

Description

When you’re cutting hay with your New Holland 451 or 456 mower, a dull or damaged sickle bar can turn a good day into a long one. This complete 9-foot riveted knife assembly brings your cutting bar back to factory specs, giving you the clean cuts you need to put up quality hay. The under-serrated sections bite into tough stems and slice through heavy grass that would bog down worn blades.

What You’re Getting

• Complete 9-foot riveted knife with 34 precision-ground sections for consistent cutting along the entire bar
• Fine tooth serrations with 14 teeth per inch that grab and cut cleanly through both tender and woody stems
• Under-serrated design puts the cutting edge where it does the most good—underneath where stems can’t escape
• Proper 2-inch hole spacing matches your mower’s drive system perfectly
• Riveted construction eliminates the loose bolts that plague field repairs

Built for Real Hay Work

This knife fits the New Holland 451 and 456 sickle bar mowers that thousands of hay producers depend on for their first, second, and third cuttings. Whether you’re cutting alfalfa, timothy, clover, or mixed grass, these mowers handle everything from roadside ditches to premium hay fields. The 451 and 456 are known for their reliability in conditions where disc mowers struggle—uneven ground, fence rows, and fields with rocks or debris.

Made to Last

Hay cutting is hard on equipment, and cheap knife sections show it quickly with chipped edges and bent points. This assembly uses quality steel that holds an edge through long days and tough conditions. The riveted design means no loose hardware to tighten or lose, and the sections are spaced correctly to work with your mower’s timing and guards.

Good to Know

Installation requires removing the old knife assembly and sliding this one into place—most folks can handle it with basic tools. Check your guards while you’ve got the knife off, as worn guards will dull new sections quickly. If you’re replacing because of breakage, look for bent sections in your cutter bar that might have caused the problem.