
SKF 6309-2Z/C3LHT23 deep groove ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Deep groove ball bearings
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Since 1945 · Martínez, Buenos Aires, Argentina
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Other brands in this category
Ask us about alternatives. Equivalence is verified for each reference and application.
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How to read SKF 6309-2Z/C3LHT23
- 63Series
- Deep groove ball bearings, 63 series. For the same bore, each series has a different outside diameter and width.
- 09Bore
- 45 mm bore: 09 × 5.
- 2Z/C3LHT23Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
6309 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 6309-2Z/C3LHT23 bearing has a 45 mm bore, a 100 mm outside diameter and a 25 mm width (45 x 100 x 25 mm).
SKF 6309-2Z/C3LHT23 is a reference of deep groove ball bearing, within Bearings. Request a quote for 6309-2Z/C3LHT23 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF deep groove ball bearings with 2Z/C3LHT suffixes are components designed to support radial and axial loads in applications requiring protection against contaminants and high temperatures. Their construction includes two steel shields (2Z) that retain lubricant and block particles, while C3 internal clearance and high-temperature lubricant (LHT) allow stable operation in demanding environments. They are ideal for electric motors, fans and industrial equipment operating under severe conditions.
The designation of these bearings is interpreted as follows: the base number (for example, 6003, 6205, 6302) indicates the size and dimension series. The 2Z suffix indicates that the bearing has two metal shields, one on each side. The C3 designation corresponds to a radial internal clearance greater than standard, which compensates for thermal expansion and reduces the risk of seizure. Finally, LHT23 or LHT55 identifies the type of high-temperature lubricant with which it is pre-lubricated from the factory. Thus, a 6206-2Z/C3LHT23 is a bearing from the 62 series, with double shields, C3 clearance and high-temperature grease.
These bearings are used in a wide variety of industrial applications in Argentina. They are common in low- and medium-power electric motors, fans and extractors, centrifugal pumps, compressors, conveyor belts and agricultural machinery. They are also found in refrigeration equipment and transmission systems where operating temperatures exceed 100 °C. Their ability to support combined loads and their protection against dust and moisture make them suitable for environments with contaminants, as long as mounting and lubrication conditions are respected.
To correctly select a 2Z/C3LHT bearing, it is essential to consider radial and axial load, rotational speed and working temperature. C3 clearance is recommended when thermal differences between the inner and outer rings are expected, or when greater mounting tolerance is required. 2Z shields offer effective protection against solid particles, but they are not liquid-tight; if there is exposure to water or vapors, contact seals should be evaluated. LHT lubrication is formulated for high temperatures, so relubrication is not necessary in most cases. During mounting, ensure correct alignment and avoid impacts that could damage the raceways.
As for equivalents and interchangeability, SKF bearings in this series can be replaced by products from other brands that follow the same international designation. However, it is important to verify that the LHT suffix corresponds to a lubricant with a similar temperature range and that C3 clearance is maintained. Not all manufacturers offer exactly the same performance, so it is always advisable to consult the technical specifications before substituting. At MR Accesorios Industriales we sell SKF and can advise you on the best option for your application.
If you need a quote for an SKF deep groove ball bearing with these characteristics, send us the full part number via WhatsApp. At MR Accesorios Industriales we help you identify the right replacement and resolve any questions about mounting or lubrication. Write to us and we will reply promptly.
Other SKF versions of the 6309 series
These versions of the 6309 series appear in SKF catalogues and do not have their own page on this site. Ask us about any of them with the part number: we will source it and send you a quote.
- SKF 6309 N
Dimensions
Boundary dimensions of the basic designation 6309 per ISO 15: 45 x 100 x 25 mm (d x D x B).
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 25mm
The same size in other brands
Pages from other brands with the basic designation 6309: 45 x 100 x 25 mm (d x D x B) per ISO 15.
- FAG6309-C-2Z6309-C6309-C-2HRS
- KOYO6309
- NSK6309 ZZ6309
- NTN6309ZZ63096309LLB2 more →
- RKB6309
- TIMKEN63096309M
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 SKF 6309-2Z/C3LHT23 bearing?
- The SKF 6309-2Z/C3LHT23 bearing has a 45 mm bore, a 100 mm outside diameter and a 25 mm width (45 x 100 x 25 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 6309.
- What does the 2Z suffix mean on an SKF bearing?
- The 2Z suffix indicates that the bearing has two metal shields, one on each side. These shields retain lubricant and prevent the entry of large particles, but they are not liquid-tight.
- What is C3 clearance for in these bearings?
- C3 clearance is a radial internal clearance greater than standard. It is used to compensate for thermal expansion, reduce the risk of seizure and facilitate mounting in applications with high temperatures or interference fits.
- What is the difference between LHT23 and LHT55?
- LHT23 and LHT55 are high-temperature lubricant designations. LHT23 typically has a temperature range up to approximately 150 °C, while LHT55 withstands higher temperatures, up to 200 °C. The choice depends on the operating temperature.

