Understanding the "LA" Suffix Importance
When servicing automotive hubs, precision is binary: it fits, or it destroys the spindle. The LM67000LA is a variation of the standard LM67048 cone. While the bore diameter (1.2500") is identical, the "LA" suffix often denotes a critical modification to the Backface Rib Radius or internal geometry profile. This specific radius is engineered to clear the fillet on the spindle shaft. Using a standard cone where an "LA" is specified can prevent the bearing from seating fully against the shoulder, leading to catastrophic looseness and wheel wobble.
Cone vs. Cup: Component Replacement Strategy
We offer the LM67000LA as a standalone component for mechanics who are performing partial rebuilds. However, best practice dictates replacing both the Cone (Inner) and the Cup (Outer). If you are looking for the complete matched set, please verify your Outer Ring number. This cone is most commonly paired with the 902B6 or 902B1 cups.
Check the full set page here: LM67000LA-902B6 Matched Set.
Material and Heat Treatment
Like its heavy-duty cousin, the Timken 462, this automotive cone is manufactured from case-carburized alloy steel. This provides a hard, fatigue-resistant surface for the rollers to travel on, while the core remains ductile to absorb the shocks of potholes and road debris. This contrasts with cheaper "Through-Hardened" bearings often found in generic white boxes, which can crack under impact.
Application Fitment
The LM67000LA is frequently found in the front wheel hubs of 4WD vehicles and light trucks from the 1980s and 1990s. It is also used in agricultural machinery spindles. If you are working on a trailer, you might be looking for the smaller LM29749 series instead. Always measure your old bearing with a caliper to confirm the bore is exactly 1.2500 inches.