The blade set part numbers found are TCU30317 and UC22010. The blade measurement captured is thickness 0.25 in (6 mm) and center hole 1 in (25 mm). The deck uses 3 blades.
Blade set part #TCU30317 and UC22010
Blade sizethickness 0.25 in (6 mm) and center hole 1 in (25 mm)
Blade count3 blades
John Deere Z820A Mower Blade Size and Part Numbers
Mower blade set part number
TCU30317 and UC22010
Blade thickness
0.25 in (6 mm)
Blade center hole size
1 in (25 mm)
Number of blades
3 blades
Blade type
high-lift, mulching, and bagging
Blade Size Comparison Chart
Blade thickness comparison
This model
0.25 in
Average
0.25 in
Low
0.188 in
High
0.312 in
John Deere Z820A Blade Notes
Blade note
The John Deere Z820A blade listing captured here shows blade set part numbers TCU30317 and UC22010 and thickness 0.25 in (6 mm) and center hole 1 in (25 mm). Do not buy purely from model name if the mower deck or serial range is different
Deck note
For the John Deere Z820A, 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 Z820A, blade type is listed as high-lift, mulching, and bagging. 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 Z820A, confirm part number, deck size and blade count before buying
John Deere Z820A Mower Blade FAQ
Why does the John Deere Z820A blade center hole matter?
The captured center-hole detail is 1 in (25 mm). If the hole shape or size is wrong, the blade may not seat correctly on the spindle even if the length looks right
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.
