SKF 302/28 J2 tapered roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Tapered roller bearings
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Decoding SKF 302/28 J2
- 302Series
- Tapered roller bearings, 302 series. Series differ in outside diameter and width even when the bore is the same.
- /28Bore
- Bore: 28 mm.
- J2Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
302/28 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 302/28 J2 measures 28 mm across the bore and 58 mm across the outside diameter; its total width is 17.25 mm (28 x 58 x 17.25 mm).
SKF 302/28 J2 belongs to tapered roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 302/28 J2 and any equivalents.
SKF tapered roller bearings are separable: a cone (inner ring with rollers and cage) fits into a cup (outer ring). This design manages radial and axial forces together and offers high load capacity. You will find them in gearboxes, wheel hubs, machine tools and other industrial equipment where axial clearance needs precise control. MR supplies this line and can advise on the right designation.
Reading the part number helps you specify correctly. Take 30302 J2: the digits set the size within a dimension series, the J indicates the contact angle, and the final 2 points to a cage or treatment variant. Not every bearing carries all letters; each suffix reflects a specific design detail. The series is known by its letters, such as series J, with 30302 J2 as an example.
These bearings are common in gearboxes, speed reducers, vehicle wheel hubs and material handling equipment. Road and agricultural machinery also use them, as do machine tool spindles. Because they take combined loads, they suit assemblies where the shaft sees radial and axial forces at the same time, like pumps, fans and conveyors.
Selection depends on load type, rotation speed and available space. During assembly, set the axial clearance carefully: too much causes vibration and wear, too little raises the temperature. Use lubrication that matches the operating regime, and seal against contamination. Cone and cup must be aligned; angular misalignment cuts service life. Follow the manufacturer's instructions for mounting and start-up.
For replacements, tapered roller bearings are identified by their numeric designation and suffixes, which can differ between manufacturers. There is no universal automatic match: two bearings with the same basic designation may vary in tolerances, cage or heat treatment. Always check dimensions and characteristics against the complete part number. MR can help you interpret the designation and locate the right part.
Dimensions
28 x 58 x 17.25 mm (d x D x T): boundary dimensions for basic designation 302/28, according to ISO 355.
- Bore
- 28mm
- Outside diameter (D)
- 58mm
- Total width (T)
- 17.25mm
Same size, other brands
Other brands' pages with basic designation 302/28: 28 x 58 x 17.25 mm (d x D x T) per ISO 355.
- RKB302/28
What they share are the ISO 355 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- SKF 302/28 J2 bearing: what are its dimensions?
- SKF 302/28 J2 measures 28 mm across the bore and 58 mm across the outside diameter; its total width is 17.25 mm (28 x 58 x 17.25 mm). Those are the boundary dimensions standardized in ISO 355 for basic designation 302/28.
- What does the designation of a tapered roller bearing mean?
- The designation combines numbers and letters for dimensions, contact angle and cage or treatment variants. In 30302 J2, the digits give the size, J the angle and 2 the variant. Each suffix reflects a specific design feature.
- How is a tapered roller bearing mounted?
- Mount it by adjusting axial clearance to the manufacturer's specifications. Align cone and cup, lubricate correctly and avoid blows that damage the raceways. Poor clearance adjustment shortens service life. Follow the technical instructions for each application.
- Can I replace a bearing from one brand with one from another?
- Not always. Even if the basic designation matches, tolerances, cage or heat treatment may differ. Verify dimensions and characteristics with the complete part number. MR can help you interpret the designation and find the right equivalent.