NTN KMJ25×31×18.3X1SK needle roller cage
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Needle roller cages and components
- Series
- KMJ
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Description
NTN KMJ25×31×18.3X1SK belongs to needle roller cage, 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 KMJ25×31×18.3X1SK and any equivalents.
The NTN KMJ series needle cage keeps needle rollers evenly spaced and properly guided inside the bearing, which supports smooth running and consistent load distribution. It suits assemblies where radial room is tight but load capacity still matters, including transmissions, electric motors and general industrial machinery. MR Industrial Accessories LLC supplies this series in standard sizes and helps customers match the correct cage to their bearing.
Reading a KMJ code is straightforward once you know the order of the figures. The first value is the bore, the second is the outside diameter and the third is the cage width. Take KMJ15×21×16.8X1SK: bore 15 mm, outside diameter 21 mm, width 16.8 mm. The SK ending marks a particular design variant inside the series, while the KMJ‥S group covers configurations that differ slightly in dimensions or material.
These cages appear in needle roller bearings working under demanding conditions, such as gearboxes, pumps, compressors, machine tools and power transmission equipment. Their compact construction lets them fit into confined spaces while still carrying the required load.
Selection comes down to the bearing dimensions and the lubrication method. The cage has to be installed straight and without force, because a poor fit can shorten bearing life. Confirm that the sealing of the assembly suits the working environment and that internal clearance fits the application. Use the lubricant specified for the complete bearing.
NTN needle cages can be replaced by cages from other manufacturers that share the same standard dimensions, provided tolerances and bearing design are respected. For a replacement, compare dimensions and cage type rather than relying on the code alone. Send us the original code and we will identify the compatible equivalent.
To request a quote for an NTN KMJ series needle cage, message us on WhatsApp or by email with the code or the dimensions you need. Our team replies promptly and can suggest equivalents or help you choose the right component for your equipment.
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 SK suffix mean in the KMJ series?
- The SK suffix identifies a design variant within the KMJ series, which may relate to a surface treatment, a specific material or a particular tolerance. Send us your code on WhatsApp and we will confirm the exact characteristic.
- How do I choose the right needle cage for my bearing?
- You need the bearing dimensions (bore, outside diameter and width) and the lubrication type. The cage must match those dimensions and the design of the assembly. If you send us the bearing code, we will help you identify the corresponding cage.
- Are NTN cages interchangeable with other brands?
- Yes, as long as dimensions and tolerances match the standard ones. When replacing, compare dimensions and cage type, not just the code. If you have a code from another brand, ask us and we will tell you the compatible equivalent.