NSK RNA6902TT needle roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Needle roller bearing
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Description
NSK RNA6902TT belongs to needle 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 RNA6902TT and any equivalents.
The NSK RNA TT series is a needle roller bearing that operates without an inner ring, so the shaft itself serves as the raceway. This design suits arrangements where radial space is tight and the outer diameter cannot grow, while still carrying high radial loads. The needle and cage assembly also permits high speeds.
Reading the code helps when you are matching a part. RNA identifies a needle roller bearing with a machined outer ring and no inner ring. The number that follows is tied to the shaft diameter or to a size code, depending on the series. The TT suffix denotes a variant with two ribs or seals, depending on the version.
Typical uses include automotive components, machine tools, transmission equipment, pumps, compressors and packaging machinery. They also appear in gearbox, electric motor, lifting system and agricultural equipment repairs. Where the outer diameter is limited and high rigidity is needed, this bearing type is often the practical choice.
Selection comes down to shaft diameter, radial load and lubrication conditions. The RNA TT series can run on grease or oil. Shaft-to-housing alignment should be precise, and where sealing or protective plates are fitted they help keep lubricant in and contamination out. Use suitable mounting tools to avoid damaging the needles or the cage.
Needle roller bearings without an inner ring from different brands can be interchanged when the main dimensions and load capacity match. Always verify the complete code and tolerances. If you have another brand's code or an unidentified part, send it over and we can identify the compatible alternative or quote the exact code you need.
To request a quote, send the part number by WhatsApp or email. We reply promptly with the information your application requires, and we can also advise on lubrication and mounting.
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 the TT suffix mean on this NSK series?
- TT indicates a variant with two ribs or seals, depending on the configuration. To confirm the exact characteristics of a specific code, contact us with the part number.
- How do I determine the needle roller bearing size I need?
- Measure the shaft diameter and the housing, and consider the radial load. Send those measurements or the original part code and we will quote the equivalent NSK bearing.
- Does this bearing require maintenance?
- In some applications the bearing can be lubricated for life, but under severe conditions relubrication is recommended. We can advise on the lubricant and frequency for your equipment.