NTN 239/900K spherical roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Spherical roller bearings
We respond promptly.
Since 1945 · Martínez, Buenos Aires, Argentina
Request your quote via WhatsApp or email, with the quantity you need.
Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.
How to read NTN 239/900K
- 239Series
- Spherical roller bearings, 239 series. For the same bore, each series has a different outside diameter and width.
- /900Bore
- 900 mm bore.
- KSuffix
- NTN suffix: it defines the variant (sealing, cage, internal clearance or other features).
239/900 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The NTN 239/900K bearing has a 900 mm bore, a 1180 mm outside diameter and a 206 mm width (900 x 1180 x 206 mm).
NTN 239/900K is a reference of spherical roller bearing, within Bearings. Request a quote for 239/900K via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
NTN K series spherical roller bearings are self-aligning components with two rows of rollers, designed to withstand high radial loads and axial loads in both directions, even with misalignment between shaft and housing. They are used in heavy equipment where shaft deflection or mounting errors require self-aligning capability. MR Accesorios Industriales sells this line for industrial applications in Buenos Aires, Argentina.
The K series designation is interpreted by the size number and the K suffix, which indicates a tapered bore with 1:12 taper. Examples 239/500K, 239/530K and 239/560K correspond to the 239 series with bore diameters expressed in millimeters (500, 530 and 560 mm respectively). The K suffix is key for mounting on tapered shafts or adapter sleeves, which facilitates adjustment and disassembly.
These bearings are used in core industries: steel, cement, mining, paper, cranes and heavy transmission equipment. In Argentina, they are commonly found in large gearboxes, mills, rotary kilns and conveyors. Their self-aligning capability makes them ideal for long shafts subject to deflection, where other rigid bearings do not tolerate misalignment.
For correct selection, take into account radial and axial load, rotation speed and environmental conditions. Sealing is critical in dusty or humid environments: choose configurations with seals or protective plates. Lubrication can be grease or oil, and internal clearance must be adjusted according to the application. When mounting with a tapered bore, verify the tightening of the adapter sleeve to achieve the proper residual clearance.
Regarding equivalences, NTN K series spherical roller bearings are interchangeable with those of other brands that follow the same ISO designation, such as SKF, FAG or NSK, provided dimensions and suffixes match. For replacements, it is essential to verify the complete part number and tolerances. If you have the part number from another brand, we will indicate the compatible alternative.
To request a quote for the bearing you need, send the complete part number by WhatsApp to MR Accesorios Industriales. We will reply shortly with availability and commercial terms. If you cannot find the exact reference, write to us with the model or dimensions and we will source it for you.
Dimensions
Boundary dimensions of the basic designation 239/900 per ISO 15: 900 x 1180 x 206 mm (d x D x B).
- Bore
- 900 mm
- Outside diameter (D)
- 1180mm
- Width (B)
- 206mm
The same size in other brands
Pages from other brands with the basic designation 239/900: 900 x 1180 x 206 mm (d x D x B) per ISO 15.
They share the boundary dimensions set by ISO 15, not the technical data: seals or shields, internal clearance, cage and load rating can differ by brand and suffix. We quote each one by its full part number.
Frequently Asked Questions
- What are the dimensions of the NTN 239/900K bearing?
- The NTN 239/900K bearing has a 900 mm bore, a 1180 mm outside diameter and a 206 mm width (900 x 1180 x 206 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 239/900.
- What does the K suffix mean on these bearings?
- The K suffix indicates that the bearing has a tapered bore with 1:12 taper. This allows it to be mounted on a tapered shaft or with an adapter sleeve, which facilitates adjustment of internal clearance and disassembly.
- Are they interchangeable with bearings from other brands?
- Yes, NTN K series spherical roller bearings are interchangeable with those of other brands that follow the same ISO designation, such as SKF, FAG or NSK, provided dimensions and suffixes match. Verify the complete part number.
- How do I request a quote for a bearing from this series?
- Write to us on WhatsApp with the complete bearing part number, for example 239/500K. We will quote it shortly. If you do not have the part number, send us the dimensions or the equipment model and we will source it for you.