SKF NK 8/12 TN needle roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Needle roller bearing
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Description
SKF NK 8/12 TN 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 NK 8/12 TN and any equivalents.
Needle roller bearings in the SKF NK TN range are single-row radial units supplied without an inner ring and fitted with a plastic cage. They suit positions where radial room is tight but the load to be carried is significant. In these bearings the shaft itself becomes the raceway, so its surface condition matters. For power transmission and general machinery work, this makes them a space-saving option.
Reading the code helps when you order. NK tells you it is a needle roller bearing with a machined outer ring and cage, no inner ring. The figure following NK is the outer ring bore diameter in millimeters, and the figure after the slash is the overall width in millimeters. So NK 5/10 TN measures 5 mm bore by 10 mm width, and the same logic applies to NK 6/12 TN or NK 8/16 TN. The TN marking points to an injected plastic cage: lighter than steel and suitable for higher speeds, though with its own temperature ceiling.
Typical applications sit where every millimeter counts: machine tools, transmission equipment, pumps, compressors, electric motors, agricultural machinery and material handling equipment. Gearbox repairs, transmission shafts and lifting mechanisms are common uses. Because they handle high radial loads in a small diameter, they often step in where a ball bearing would lack the rigidity and durability the job demands.
Selection comes down to radial load, speed and the space you have. The shaft has to be hard and smooth enough to work as a raceway; if it is not, an inner sleeve solves the problem. Lubrication, grease or oil depending on the application, plus sealing against contaminants, keeps the bearing running. Shaft and housing need to line up accurately so no unwanted axial loads appear. Stay within the temperature limits the manufacturer gives for the TN cage.
On interchangeability: needle roller bearings without an inner ring can be swapped between brands when dimensions and tolerances line up. SKF NK units can be matched to equivalents from other makers, but check bore diameter, width and load capacity every time. Cages differ, and a plastic TN cage will not have the same temperature limits as a steel one. MR Industrial Accessories can confirm whether a substitute fits before you commit.
To get a quote, send the full part number to MR Industrial Accessories by WhatsApp or email. The team responds promptly, can point you to equivalent references and will help you choose the right option for the application.
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 TN suffix indicate on an SKF bearing?
- It identifies an injected plastic cage, usually polyamide. The cage is light and corrosion resistant and tolerates higher speeds than a steel cage, but its temperature limits should be checked for your application.
- Is an inner ring required with this bearing?
- No. The NK series has no inner ring, so the shaft serves as the raceway and must be hard and smooth enough. Where the shaft does not meet that, an inner sleeve can be added.
- How do I get a quote for this bearing?
- Send the complete part number to MR Industrial Accessories by WhatsApp or email, along with the quantity and any special requirements. The team replies promptly with a quote.