NTN 1220SK self-aligning ball bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
We respond promptly.
Since 1945 · Martínez, Buenos Aires, Argentina
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How to read NTN 1220SK
- 12Series
- Self-aligning ball bearings, 12 series. For the same bore, each series has a different outside diameter and width.
- 20Bore
- 100 mm bore: 20 × 5.
- SKSuffix
- NTN suffix: it defines the variant (sealing, cage, internal clearance or other features).
1220 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The NTN 1220SK bearing has a 100 mm bore, a 180 mm outside diameter and a 34 mm width (100 x 180 x 34 mm).
NTN 1220SK is a reference of self-aligning ball bearing, within Bearings. Request a quote for 1220SK via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The NTN SK series self-aligning ball bearing is a self-aligning bearing with two rows of balls, designed to carry radial loads and compensate for angular misalignment between shaft and housing. Its spherical outer raceway allows the inner ring to oscillate, absorbing mounting errors or shaft deflection. It is used in equipment where perfect alignment is not guaranteed, such as fans, pumps, conveyors and agricultural machinery. MR Accesorios Industriales sells the NTN SK series in Buenos Aires, Argentina.
The SK series designation is read simply: the basic number indicates the size and load capacity, and the SK suffix indicates that the bearing has a tapered bore with 1:12 taper. For example, 1204SK, 1205SK and 1206SK share the SK suffix, which allows it to be mounted directly on tapered shafts or with adapter sleeves. The higher the basic number, the larger the bore diameter and load capacity. This nomenclature makes it easy to quickly identify the series and its application.
In Argentine industry, SK series self-aligning bearings are found in industrial fans, centrifugal pumps, belt conveyors, vibrating screens and agricultural equipment. Their self-aligning capability makes them suitable for long shafts subject to deflection or for assemblies where the housing is not perfectly machined. They are also used in textile machines, industrial washing equipment and process equipment where alignment conditions vary. MR Accesorios Industriales sells them for replacement and new projects throughout the country.
To select an SK bearing, take into account the radial and axial load, the rotation speed and the type of sealing required. The tapered bore with 1:12 taper requires mounting on a tapered shaft or with an adapter sleeve; check the tightening torque and concentricity. Lubrication can be with grease or oil depending on the application, and the internal clearance is adjusted during mounting. Initial alignment is less critical thanks to the self-aligning capability, but it is advisable to check that the misalignment angle does not exceed the permissible limits. For dusty or humid environments, choose variants with seals or protective covers.
NTN SK series self-aligning bearings are interchangeable with those of other brands that follow the same dimensional nomenclature and the SK suffix. When replacing, compare the main dimensions, the bore type and the internal clearance. If the original part number corresponds to another brand, MR can tell you the compatible equivalent. Interchangeability between manufacturers is not always direct: check tolerances and original lubrication. For accurate identification, send the part number or the dimensions of the bearing you need to replace.
If you are looking for an NTN SK series self-aligning ball bearing, write to us on WhatsApp with the part number or the shaft and housing dimensions. At MR Accesorios Industriales we quote the exact reference and advise you on mounting and lubrication. We handle inquiries from all over the country and ship promptly. We can also help you identify the part if you do not have the part number at hand. Request a quote for your SK bearing with us and ensure your equipment keeps running.
Dimensions
Boundary dimensions of the basic designation 1220 per ISO 15: 100 x 180 x 34 mm (d x D x B).
- Bore
- 100 mm
- Outside diameter (D)
- 180mm
- Width (B)
- 34mm
Same size in SKF and other brands
Pages from other brands with the basic designation 1220: 100 x 180 x 34 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 1220SK bearing?
- The NTN 1220SK bearing has a 100 mm bore, a 180 mm outside diameter and a 34 mm width (100 x 180 x 34 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 1220.
- What does the SK suffix mean on a self-aligning bearing?
- The SK suffix indicates that the bearing has a tapered bore with 1:12 taper. This allows it to be mounted on a tapered shaft or by means of an adapter sleeve, which makes it easier to adjust the internal clearance and secure it on the shaft.
- How do I choose the right SK bearing for my application?
- Consider the radial and axial load, the speed, the shaft diameter and the environmental conditions. The tapered bore requires a compatible shaft or sleeve. For dusty or humid environments, choose variants with seals. At MR we advise you according to your equipment.
- Are NTN SK series bearings interchangeable with other brands?
- Yes, they are interchangeable with bearings from other brands that share the same dimensional nomenclature and the SK suffix. When replacing, check dimensions, bore type and internal clearance. If you have the part number from another brand, we can tell you the equivalent.