The John Deere Z345M mower blade part number found is GY20683. The blade set part numbers found are UC22008 and M170639. The blade measurement captured is center hole round / 1 in (25 mm). The deck uses 3 blades.
John Deere Z345M Mower Blade Size and Part Numbers
| Mower blade part number | GY20683 |
|---|---|
| Mower blade set part number | UC22008 and M170639 |
| Blade center hole size | round / 1 in (25 mm) |
| Number of blades | 3 blades |
| Blade type | high-lift |
John Deere Z345M Blade Notes
| Blade note | The John Deere Z345M blade listing captured here shows single blade part number GY20683, blade set part numbers UC22008 and M170639, and center hole round / 1 in (25 mm). Confirm the number against the deck tag, old blade stamp or official parts diagram before ordering |
|---|---|
| Deck note | For the John Deere Z345M, the captured deck information is blade count 3 blades. This helps separate 42-inch, 48-inch, 54-inch and larger deck blade setups |
| Blade type note | The blade type captured for the John Deere Z345M is high-lift. High-lift is usually better for bagging, while mulching blades are for chopping clippings finer under a compatible deck |
| Fitment note | Before ordering John Deere Z345M blades, compare the old blade stamp, center-hole shape, blade length and deck size. Close-looking blades can still be wrong |
John Deere Z345M Mower Blade FAQ
Can you modify a John Deere Z345M blade center hole to fit?
Do not do that. The captured center-hole detail is round / 1 in (25 mm). Grinding or drilling a mower blade can ruin balance and create vibration
Should you buy one John Deere Z345M blade or a full set?
The single blade number captured is GY20683, and the set number captured is UC22008 and M170639. If one blade is bent from damage, one may be fine; if they are worn down, replacing the full set usually gives a cleaner cut
Can you swap John Deere Z345M blade types?
The blade type captured is high-lift. You can often choose a different style only if it fits the same deck and spindle setup. Use GY20683 as the fitment starting point
Mistakes do happen. Blade specs can change by year, mower deck, spindle, serial range and regional parts catalog. Please check the operator manual, old blade stamp, deck tag and official John Deere parts catalog before ordering replacement blades.
