The blade set part number found is TCU21475. The deck uses 3 blades.
Blade set part #TCU21475
Blade count3 blades
John Deere Z645 Mower Blade Size and Part Numbers
Mower blade set part number
TCU21475
Number of blades
3 blades
Blade type
high-lift and mulching
John Deere Z645 Blade Notes
Blade note
The John Deere Z645 blade listing captured here shows blade set part number TCU21475. Do not buy purely from model name if the mower deck or serial range is different
Deck note
For the John Deere Z645, the captured deck information is blade count 3 blades. Deck size matters because the same model family can use different blade kits
Blade type note
For the John Deere Z645, blade type is listed as high-lift and mulching. Pick the blade style for the job: clean discharge, bagging lift, or mulching
Fitment note
Blades are cheap until you buy the wrong set twice. On the John Deere Z645, confirm part number, deck size and blade count before buying
Official information note
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.
