SKF 29412 E Spherical Roller Thrust Bearing, 60x130x42 mm

A thrust bearing for very heavy axial loads that also tolerates misalignment

The SKF 29412 E is a spherical roller thrust bearing with a stamped steel cage, a 60 mm bore, 130 mm outside diameter and 42 mm height. It accommodates very heavy axial loads in one direction together with considerable radial loads, and it has the highest load rating of all thrust bearings. Its static rating of 915 kN against a 390 kN dynamic rating shows how it is built for heavy, often slow, axial duty.

In the SKF brochure, spherical roller thrust bearings are the only roller thrust bearings that can accommodate radial loads as well as axial loads, up to 55 percent of the simultaneously acting axial load, and the only ones that accommodate misalignment between shaft and housing. That allows one bearing to replace a combination of a radial and a thrust bearing, as in vertical shaft drives and large gearboxes.

Technical specifications

Design features and how the bearing is built

The bearing is separable: the shaft washer with the cage and roller assembly mounts separately from the housing washer. SKF describes the raceways and rollers as an optimised balance between contact pressure and friction, and the brochure states that Xbite heat treated steel gives dimensional stability up to 200 degrees C. Depending on series and operating conditions the brochure gives permissible misalignment of up to 3 degrees between shaft and housing.

The product table lists heights and diameters needed for the layout: height H 42 mm, shaft washer height with cage B1 of 36.7 mm, housing washer height C of 21 mm, the distance s of 38 mm from the shaft washer end face to the pressure point, and a shaft washer end face diameter d1 of approx. 112 mm. A minimum axial load factor A of 0.08 is given for the minimum load calculation.

Selection and ordering notes

The shaft abutment must be at least 90 mm, the housing abutment at most 107 mm and a spacer ring diameter db1 and db2 of at most 67 mm is listed for the shaft side. Fillet radius ra must not exceed 1.5 mm. The SKF brochure covers both oil and grease lubrication; check the speed against the 2 800 r/min reference and 5 000 r/min limiting values.

Confirm the load direction (this type takes axial load in one direction), the lubricant and whether a radial bearing is needed alongside. Other bearing items on the site are in Electric Motors and the SKF TKSA 41 laser shaft alignment tool is relevant for vertical shaft drives.

Documents and quotation

The attached SKF brochure on spherical roller thrust bearings sets out selection, arrangement design, lubrication and maintenance, and has the full product table. The figures above are from the SKF product page for the 29412 E. Seven Star LLC, an independent supplier in Muscat, will quote on the designation and quantity you send.