Description

When hay cutting season arrives, you need sharp, precise cutting action to get through your fields efficiently. A dull or damaged sickle knife means ragged cuts, slower ground speed, and more stress on your mower’s drive system. This complete 9-foot knife assembly gets your New Holland 451 or 456 mower back to making clean, sharp cuts through whatever hay crop you’re putting up.

What You’re Getting

Complete 9-foot knife with 35 precision under-serrated sections for clean cutting
Bolted construction makes individual section replacement quick and easy when needed
Fine tooth serration with 14 teeth per inch grabs stems and cuts cleanly without tearing
Drop-in replacement that fits your existing guards and knife head assembly

Built for Real Farm Work

This knife is designed specifically for New Holland 451 and 456 mowers equipped with double guards. These mid-size mowers are popular for cutting everything from alfalfa and timothy to mixed grass hay on operations that need reliable, straightforward equipment. Whether you’re making first cutting in heavy stands or third cutting in lighter growth, this knife handles the job.

Made to Last

The under-serrated design puts the cutting teeth where they do the most good – on the bottom edge where the knife meets the crop. Each section is built to handle the vibration and impact of field work while maintaining its sharp edge through long cutting days. The bolted construction means you can replace individual worn sections instead of the whole knife.

Installation Notes

This knife bolts right onto your existing knife head using the same hardware. Make sure your guards are properly aligned and your knife head isn’t worn before installing. A sharp knife on a worn head won’t cut properly, so it’s worth checking both while you’ve got things apart.