Kobelco SK50-1 tracks and undercarriage, sized 400x72.5Nx74 (400 mm wide × 72.5 mm pitch × 74 links). Made for digging, trenching, backfill and tight-quarters work. Free freight, 24-month warranty.
What the numbers mean on a Kobelco SK50-1
- 400x72.5Nx74 — 400 mm tread width (about 16"), 72.5 mm pitch, 74 links, narrow guide lugs
Width is the tread face, pitch is the distance between drive lugs, and links is the count around the loop. All three have to match — a track one link off will not tension correctly no matter how close the width is.
Tread choice for the Kobelco SK50-1
Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:
- All-Terrain — everything in between. A compromise tread when the machine moves between surfaces
Parts we carry for the Kobelco SK50-1
Tracks. Call for anything not shown online — we can usually source it.
How these wear
Excavator undercarriages load one side hard on slew and travel, so link cracking usually shows up before the tread wears out. Replace in pairs where you can: a new track running against a stretched one loads the drive unevenly and you will feel it in the steering.
Same track, other machines
Track size follows undercarriage geometry, not brand, so 400x72.5Nx74 shows up on machines from several makers. If you run any of these alongside the Kobelco SK50-1, it is the same belt:
- Case CX47
- Case CX50
- Case CX50B
- Case CX50BMC
- Case CX50BMR
- Case CX50BZTS
- Case CX55B
- Case CX55B MSR
- Case CX65B
- Doosan DX50-5
Not sure which you are running? Read the size off the inside of the old track, or call (850) 816-7898 and we will pull it off the machine record. The Track Finder works by make and model too.
