SKF QJ 230 N2MA/C4B20 angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Angular contact ball bearings
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Description
SKF QJ 230 N2MA/C4B20 belongs to angular contact ball 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 QJ 230 N2MA/C4B20 and any equivalents.
SKF QJ series four-point contact ball bearings are built for arrangements where radial and axial forces act in both directions and space along the shaft is tight. Their raceway geometry gives the rigidity that machine tool spindles, gearboxes and precision assemblies require. MR Industrial Accessories LLC supplies this line within its SKF bearing range for customers in the United States and Latin America.
Reading a QJ designation is a matter of breaking it into blocks. The letters QJ place the bearing in the four-point family. The digits that come next set the size: in QJ 230 N2MA/C4B20, the 230 is the main dimension. What follows describes construction details. N2 points to a groove or locating variant, MA to a machined brass cage, C4 to the internal clearance, and B20 to a specific design modification. Since each suffix combination produces a different bearing, the complete part number is what makes a quote accurate.
These bearings suit machine tools, measuring equipment, high-ratio gearboxes, cranes and slewing systems. Metalworking shops, food plants and process industries rely on them where planned maintenance matters. Because they take load in both directions, they fit assemblies that have no room for two separate thrust bearings.
Selection depends on the combined load, the rotational speed and the surrounding conditions. Seals or shields keep contamination out, which counts in dusty or humid areas. C4 clearance is wider than standard and is used when thermal expansion or mounting fits would otherwise close the gap. Lubrication has to match temperature and speed, and housing-to-shaft alignment must be correct to prevent parasitic stresses.
Four-point bearings from other manufacturers can serve as equivalents when dimensions, clearance and load capacity line up. The basic number by itself says little: every suffix has to be checked, since a different cage or clearance alters how the bearing behaves. Catalogs help in the search, but the operating conditions are what confirm the choice.
To get a quote, send the full part number by WhatsApp or email to MR Industrial Accessories LLC. With it, the exact variant can be identified and a suitable alternative proposed. If interchangeability is unclear, the technical team can help with the selection.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does QJ indicate in a bearing part number?
- QJ marks four-point contact ball bearings, which carry axial loads in both directions as well as radial loads. The digits after it give the size, and the suffixes describe construction details.
- When is the C4 suffix the right choice?
- C4 means internal clearance wider than standard. It fits assemblies where mounting fits reduce clearance or where thermal expansion is significant. Share your equipment data and we can help confirm it.
- Can an SKF bearing be replaced by another brand?
- Yes, provided dimensions, clearance, cage and load capacity correspond. The basic number is not enough; all suffixes must be compared. Send the part number and we will advise.