Replacement disc blades that fit the New Holland ST440 Tandem Disc. In stock, ships from Ames, Iowa. Free shipping on orders $600+. Call the concierge line at 515-686-5575 with your serial number if you're not sure which blade you need.
New Holland ST440 blade fitment at a glance
- Machine family: Tandem Disc
- Common blade sizes: 20", 22"
- Edge configuration: notched fronts + smooth rears (typical tandem setup)
- Typical axle bore: 1-1/8" sq
Shop New Holland ST440 blades by size
- 20" blades — in stock
- 22" blades — in stock
Ordering the right blade for your New Holland ST440
To be certain the blade you order fits, verify three specs on your worn blade before ordering:
- Outside diameter — measure across the full width of the blade in inches. Blades wear from the outside in, so measure a low-wear reference blade if possible.
- Axle bore — 1-1/8" sq is standard for the New Holland ST440, but confirm on your machine.
- Edge profile — notched fronts + smooth rears (typical tandem setup). Match what came off, unless you're intentionally changing edge to change residue behavior.
If any of those are unclear, call 515-686-5575 and we'll match a blade from stock.
Other New Holland models we cover
Related resources
- New Holland tillage blades
- All disc blades for sale — full catalog
- How to size disc blades — blade sizing guide
- Notched vs. smooth disc blades
- When to replace disc harrow blades
Frequently asked questions
What size disc blades fit the New Holland ST440?
The New Holland ST440 (Tandem Disc) typically runs 20", 22" blades depending on the gang and configuration. Confirm by measuring the outside diameter of a worn blade on your machine, or call 515-686-5575 with your model serial and we'll match it.
Are these OEM New Holland blades?
No — these are premium replacement disc blades manufactured to fit the New Holland ST440. They match OEM dimensions, edge profile, and axle bore, and are drop-in replacements. DiscBladesForSale.com is not affiliated with New Holland.
What edge should I use — notched or smooth?
On a tandem disc like the New Holland ST440, the standard configuration is notched fronts + smooth rears (typical tandem setup). If you're running heavy corn stalks or no-till, run notched on the front gangs. If soil finish matters more than residue cut, run smooth.
DiscBladesForSale.com is not affiliated with, endorsed by, or sponsored by New Holland. "New Holland" and "ST440" are trademarks of their respective owners, referenced here only to describe blade fitment.