SKF 2309 M/VQ335 self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Decoding SKF 2309 M/VQ335
- 23Series
- Self-aligning ball bearings, 23 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- M/VQ335Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
2309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 2309 M/VQ335 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm).
SKF 2309 M/VQ335 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 2309 M/VQ335 and any equivalents.
Series 23 self-aligning ball bearings from SKF are double-row units whose outer ring carries a spherical raceway. That geometry lets the bearing pivot slightly inside the housing, so angular misalignment between shaft and housing is absorbed instead of fought. Fans, belt-driven equipment and continuous process lines are typical places where this behavior matters.
Reading the code is the first step in specifying one of these bearings. Take 2305 M/VQ335 and 2309 M/VQ335: the leading 23 places the bearing in the medium-section self-aligning series, with bore and outside diameter following the standard scheme for that size. A machined brass cage is what the M stands for, chosen when the duty calls for it. The /VQ335 block is an internal SKF specification, usually tied to particular tolerances or clearance. Only the full designation tells the whole story, so treat every character as significant.
Misalignment is normal in plenty of installations, and that is where this design earns its place: industrial fans and blowers, belt drives, conveyors, textile machinery, centrifugal pumps and mixers. Food processing, chemical plants, cement operations and water treatment works all rely on bearings of this type. When the shaft bends under load or the housing bore is not machined perfectly, the self-aligning action keeps the assembly from wearing out ahead of schedule.
Selection comes down to the loads the bearing must carry, radial and axial, plus the speed and the surrounding environment. Dust or moisture calls for a sealed or shielded variant; otherwise the raceways will not stay clean for long. Match the lubricant to the operating temperature. Grease for life works in many cases, while more demanding duties may need relubrication. At mounting, check alignment before tightening, press on the ring that is being fitted, and keep hammers away from the rings and raceways.
Interchange is possible with other makers' bearings that share the same dimensions and clearance class, but the suffix conventions are not universal. A brass cage, for instance, may be coded differently from one brand to the next. Confirm tolerances and internal clearance before substituting one bearing for another. If anything is unclear, send us the original code and we will help sort it out.
To replace an SKF self-aligning ball bearing or to work this series into a new build, MR Industrial Accessories can help pin down the exact reference. Send the complete code by WhatsApp or email, with a photo if you have one, and our team will come back with a quote and, where useful, suggest an equivalent.
Dimensions
45 x 100 x 36 mm (d x D x B): boundary dimensions for basic designation 2309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 36mm
Same size, other brands
Other brands' pages with basic designation 2309: 45 x 100 x 36 mm (d x D x B) per ISO 15.
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
- SKF 2309 M/VQ335 bearing: what are its dimensions?
- SKF 2309 M/VQ335 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 2309.
- What does /VQ335 indicate on an SKF bearing?
- It is an SKF internal specification. Depending on the bearing, it can relate to dimensional tolerances, internal clearance or a special manufacturing detail. Because it is not a cross-brand code, the manufacturer's technical documentation or a specialist is the right source for its exact meaning.
- Is it safe to substitute another brand for an SKF self-aligning ball bearing?
- When bore, outside diameter and width match, and the internal clearance class is the same, the bearings can generally be interchanged. Watch the suffixes, though: cage type, tolerances and lubrication can be coded differently by each maker. Check the specifications before you commit.
- When should I choose a self-aligning bearing over a rigid one?
- Choose self-aligning when the shaft can deflect, the housing may not sit perfectly true, or the load combines radial and axial components with some angular misalignment. A rigid bearing cannot compensate for those conditions and tends to fail early because of it.