Overview — SET, MAIN BEARING 2881961
2881961 is the main bearing set, standard size, used on CUMMINS engines to support the crankshaft main journals with the original clearance specification. We can supply this bearing set as well as the related family numbers listed below, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The bearing set is manufactured to the original shell profile, wall thickness and material specification for standard size journals. The bearing surface is finished to the correct clearance for the CUMMINS block and crank, and the locating tangs and oil grooves match the original design. The shells are matched as a set for consistent clearance across all mains. As an OEM-spec set, it restores the original bearing clearances during overhaul.
Applicable Models & Applications
This main bearing set is used on CUMMINS engines at overhaul for standard size main journals, including the engine series for which it is listed. The family references 3018210, 3801270, 3945917, 4025125, 4089937, 4089938, 4089941, 4089971 and more cover the same bearing duty on adjacent builds. Confirm the journal size, shell width and engine model against the bearing set removed from your engine before ordering.
Maintenance & Replacement
Replace main bearings at overhaul or when crankshaft wear, low oil pressure or bearing knock is diagnosed. Check the crank journals for taper, scoring and size before assembly. Fit the shells clean and dry or with the specified assembly lubricant, torque the main caps to specification in sequence, and check crankshaft end float and free rotation. Prime the oil system before start-up.
Price Reference (USD)
The reference price for this SET, MAIN BEARING (2881961) is approximately USD 150 – 600 per unit depending on engine model, grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Also in the SET, MAIN BEARING Series
3018210, 3801270, 3945917, 4025125, 4089937, 4089938, 4089941, 4089971, 4090025, 4095973, 4309121, 4309121F, 4911903, 4955352, 4955521, 4955745, 4955853, 4955855, 5290097, 5290097F and more.
Value & Service
Wrong bearing clearance ends in a failed crank, so we verify 2881961 against the original CUMMINS journal size and shell specification before dispatch. We stock the set and the family numbers above, and they can ship together with the gasket and seal kit for a complete overhaul in one tracked order. Our team will confirm the correct bearing set for your engine build before you buy.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and engine model, and we will confirm fitment, price and lead time for this main bearing set and related CUMMINS overhaul components.
