NSK 1205 self-aligning ball bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Decoding NSK 1205
- 12Series
- Self-aligning ball bearings, 12 series. Series differ in outside diameter and width even when the bore is the same.
- 05Bore
- Bore 25 mm (05 × 5).
1205 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK 1205 measures 25 mm across the bore and 52 mm across the outside diameter; its width is 15 mm (25 x 52 x 15 mm).
NSK 1205 belongs to self-aligning 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 1205 and any equivalents.
NSK self-aligning ball bearings are designed with two rows of balls and a spherical outer raceway, allowing them to compensate for misalignment between shaft and housing. They are a practical choice when shaft deflection or mounting inaccuracies make perfect alignment difficult. MR Industrial Accessories supplies this line as part of its bearings and power transmission range for customers in the United States and Latin America.
The part number tells you the basic design. Series 108, 126, 127, 129 and 135 are compact, single-row types. Series 1200, 1201 and 1202 are two-row with a cylindrical bore. Suffixes after the basic number indicate sealing, internal clearance or special tolerance variants. To identify the exact reference, check the complete number and any suffixes marked on the bearing or provided in your inquiry.
These bearings suit equipment where the shaft can deflect or shift out of alignment, such as conveyors, fans, centrifugal pumps, textile machinery, agricultural equipment and packaging lines. In food, chemical and process plants, mounting conditions often call for tolerance to small alignment errors. The self-aligning action helps reduce wear and supports the service life of the assembly.
Selection depends on radial and axial loads, rotation speed and the working environment. For dusty or moist conditions, consider sealed variants. Mount with suitable tools and avoid direct blows on the balls. Proper lubrication and initial alignment within the bearing's limits help maintain stable operation. Our technical team can assist if you need guidance.
NSK self-aligning ball bearings can be interchanged with equivalent references from other brands when the main dimensions, sealing type and internal clearance match. If you provide the part number from another brand, we can identify a compatible alternative. Interchangeability always depends on verifying each manufacturer's technical specifications.
To request a quote, send the part number or required size by WhatsApp or email. We reply promptly with the exact reference and, where applicable, suggest equivalents. MR Industrial Accessories supplies this brand.
Dimensions
25 x 52 x 15 mm (d x D x B): boundary dimensions for basic designation 1205, according to ISO 15.
- Bore
- 25 mm
- Outside diameter (D)
- 52mm
- Width (B)
- 15mm
SKF and other brands, same size
Other brands' pages with basic designation 1205: 25 x 52 x 15 mm (d x D x B) per ISO 15.
- Need the SKF 1205? We can also quote:1205 ETN91205 EKTN91205 ETN9/C31 more →
- FAG1205-TVH1205-K-TVH-C3
- NTN1205S1205SK
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- NSK 1205 bearing: what are its dimensions?
- NSK 1205 measures 25 mm across the bore and 52 mm across the outside diameter; its width is 15 mm (25 x 52 x 15 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 1205.
- What does self-aligning mean in a ball bearing?
- The bearing has a spherical outer raceway that lets the shaft tilt slightly relative to the housing without losing function. This compensates for shaft deflection or mounting errors, reducing stress and wear in applications where alignment is difficult.
- How do I identify the series of an NSK self-aligning ball bearing?
- The basic number marked on the bearing indicates the series. Series 108, 126, 127, 129 and 135 are single-row; 1200, 1201 and 1202 are two-row. Suffixes show sealing, clearance or tolerance. Send the full part number by WhatsApp and we will quote it.
- Can I replace a bearing from another brand with an NSK one?
- Yes, if the main dimensions, sealing type and internal clearance match. Interchangeability between brands is possible by verifying the specifications. If you send us the original part number, we will identify the equivalent NSK reference and quote it.