Excavator bottom rollers take constant abuse, so the replacement decision should come down to match and price. Two new undercarriage parts are in front of you: the IHI IHI32J bottom roller and the Case CX36B heavy-duty bottom track roller. They serve different excavator models, and their listed prices sit on opposite ends of this comparison.
Quick Verdict
For an IHI IHI32J mini excavator, the $45.99 IHI bottom roller delivers a direct replacement with a lower listed price. For a Case CX36B, the $129.00 heavy-duty bottom track roller matches that machine and brings a 50 MnB steel spec. Match the part to your undercarriage first, then use price as the tiebreaker.
At a Glance
| Product | Listed Price | Price Bar | Best For |
|---|---|---|---|
| Bottom Roller Track Roller Fit FOR IHI IHI32J Mini Excavator Undercarriage Parts | $45.99 | IHI IHI32J mini excavator owners | |
| New Heavy Duty Bottom Track Roller For Case CX36B Excavator Undercarriage Parts | $129.00 | Case CX36B excavator owners |
Where Each Bottom Roller Wins
IHI IHI32J bottom roller - wins on price listed at $45.99, more than $83 lower than the Case roller. It's a new direct replacement with a black finish, steel construction, and sealed bearings that help keep dirt and mud from reaching inner components. It is specifically fit for the IHI IHI32J mini excavator.
Case CX36B heavy-duty bottom track roller - wins for Case CX36B owners. The listing highlights 50 MnB steel, surface hardness HRC52-58 with a hardened depth of 5mm-10mm, and a package weight of 13.23 pounds. The "Heavy Duty" label in the product name supports it as a more substantial part for heavier track wear.
Both parts share the basics: they are new bottom track rollers for excavator undercarriages and both use steel construction. The real difference is the machine class, not the part type.
Product Notes
Bottom Roller Track Roller Fit FOR IHI IHI32J Mini Excavator Undercarriage Parts
The IHI IHI32J roller is the lower-priced option in this comparison at $45.99. It is a new part with a black finish, steel material, and direct replacement fitment for the IHI IHI32J mini excavator. The description points to sealed bearings and good lubricating oil retention, which help keep mud and grime out of the inner components. One limitation is fitment: the listing specifically names IHI IHI32J, so you need to match your machine to that model. The listing also recommends comparing your OE number with the photo before ordering, which is a sensible step when the part carries a specific model reference.
New Heavy Duty Bottom Track Roller For Case CX36B Excavator Undercarriage Parts
The Case CX36B roller is the higher-priced pick at $129.00. It is a new bottom track roller designed for the Case CX36B, with 50 MnB steel, a surface hardness of HRC52-58, and a hardened depth of 5mm-10mm. The 13.23-pound package weight gives a sense of the part's heft. Its limitation is narrow fitment: the title pins it to the Case CX36B, so it is not the listing to choose for an IHI IHI32J. If your work centers on a Case CX36B and you want the extra material-hardness spec, this is the alternative to the lower-priced IHI part.
Final Choice by Use Case
Choose the IHI IHI32J Bottom Roller for an IHI IHI32J mini excavator when you want the $45.99 price and a direct replacement part. Choose the Case CX36B Heavy-Duty Bottom Track Roller when you're replacing undercarriage parts on a Case CX36B and want the 50 MnB steel hardness spec at $129.00. These are the two listed fitments, so the decision follows the machine you own.
