SKF 32312 Tapered Roller Bearing, 60x130x48.5 mm

A heavy 323 series tapered roller bearing for demanding axial and radial loads

The SKF 32312 is a single row tapered roller bearing in the 2FD dimension series, with a 60 mm bore, 130 mm outside diameter and 48.5 mm total width. Its wide section and long rollers give a dynamic load rating of 282 kN and a static rating of 290 kN, far above the 32210 in the same family. The converging raceways let it carry heavy combined loads, with axial load in one direction.

It is used in pairs in heavy gearboxes, truck and trailer axles, mining and construction machinery, rolling mill equipment and large pump drives. The inner ring assembly (rollers and cage) fits separately from the outer ring, which makes mounting, setting and later inspection straightforward.

Technical specifications

Reading the product data

SKF lists the dimension series as 2FD. The product table gives inner ring width B of 46 mm and outer ring width C of 37 mm, which together with the total width T of 48.5 mm define the housing and shaft shoulders. The distance to the pressure point, a, is 31.1 mm, used for load centre calculations in a pair. The catalogue row lists a calculation factor e of 0.35 and a factor Y of 1.7.

The SKF product page records that the older designation 32312 J2/Q has been replaced by 32312. If you hold an old drawing or a worn part that carries the J2/Q suffix, ask us to cross-check it before ordering. Adjust the bearings against each other: too little clearance heats the pair and too much loses stiffness and accuracy.

Application and ordering notes

Required abutments are: shaft da of at most 74 mm and db of at least 72.5 mm; housing Da between 107 and 119.5 mm, with Db at least 120 mm; fillet radii ra up to 3 mm and rb up to 2.5 mm. Allow at least 6 mm of space for Ca and 11.5 mm for Cb. The reference speed is 4 000 r/min and the limiting speed 5 300 r/min; at 2.9 kg the bearing is easy to handle but still benefits from an induction heater rather than an open flame.

State whether you need a single bearing, a matched pair or a particular tolerance class. Where the application is a motor or pump drive, see Electric Motors for related bearings, and the SKF TIH 030m induction heater for installation heat on small sizes.

Documents and quotation

The attached brochure explains SKF tapered roller bearing performance classes: standard, TQ-line, Explorer, energy efficient and CL7C. It does not list this single number. Dimensions and ratings here come from the SKF product page and the SKF catalogue row. Seven Star LLC, an independent supplier in Muscat, will quote on the designation and quantity you send.