RKB QJ 1028 angular contact ball bearing
- Brand
- RKB
- Category
- Bearings
- Subcategory
- Angular contact ball bearings
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Description
RKB QJ 1028 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 1028 and any equivalents.
The RKB QJ series is a four-point contact ball bearing. Because the balls touch the inner and outer rings at two points, the bearing handles radial loads and axial loads from either direction. It suits arrangements where one support has to hold a shaft in both directions and space is tight.
Reading the code is straightforward: QJ marks the four-point contact type, and the figure after it gives the size, for example QJ 202, QJ 203, QJ 205 or QJ 210. Of that figure, the first two digits tie back to the bore diameter and the final digit to the dimension series. Suffixes added after the number cover cage, internal clearance or sealing options where they apply.
Maintenance and purchasing teams specify these bearings when a single support has to combine axial and radial stiffness: machine tools, gearboxes, pumps, fans, transmission equipment and assemblies that must locate the shaft in both directions. They also fit low and medium speed positions where room is limited and the assembly should stay simple.
When choosing a QJ bearing, look at the axial load in each direction, the rotational speed and the internal clearance required. Shaft and housing need careful alignment during mounting, and lubrication, grease or oil, should match the operating conditions. In dusty or damp environments, sealed versions are worth reviewing. Cage style and clearance follow the application.
Interchange between brands works through the dimensional designation, so an RKB QJ 205 can be matched to another maker's bearing that carries the same nomenclature and dimensions. Check bore, outer diameter and width, plus cage type and clearance. Have a part number from a different brand? Send it over and we will identify the equivalent.
For any bearing in the QJ series, send the part number by WhatsApp or email to MR Industrial Accessories and our team will quote it promptly. We can also advise on other angular contact series and suggest equivalents or help you choose the right unit.
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 designation?
- QJ denotes a four-point contact ball bearing, a design that takes axial loads in both directions together with radial loads. The number after the letters gives the size and dimension series, a format used across bearing catalogues.
- How do I find a replacement for a QJ 205?
- Match the main dimensions first: bore, outer diameter and width. Then confirm cage type and internal clearance. Send us the part number from your current brand by WhatsApp or email and we will point you to the equivalent.
- Where are QJ bearings typically used?
- They appear in machine tools, gearboxes, pumps, fans and transmission equipment where one support must locate the shaft in both directions. They also suit compact assemblies with moderate axial loads.