SKF 3309 ANR double row angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Double row angular contact ball bearings
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Decoding SKF 3309 ANR
- 33Series
- Double row angular contact ball bearings, 33 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- ANRSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
3309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 3309 ANR measures 45 mm across the bore and 100 mm across the outside diameter; its width is 39.7 mm (45 x 100 x 39.7 mm).
SKF 3309 ANR belongs to double row angular contact 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 3309 ANR and any equivalents.
When a shaft has to hold its axial position while carrying both radial and axial forces, a double row angular contact bearing is often the practical answer. SKF supplies these units with the ANR suffix, and their two rows of balls allow a narrower mounting than a pair of single row bearings. Machine tools, pumps and gearboxes are typical homes for this design. MR Industrial Accessories lists this line within its SKF bearing range.
Reading the code is the first step in selection. The base number gives the dimension series, while ANR marks a variant whose sealing or internal clearance details differ from the standard version. Take 3305 ANR: it is a double row unit from the 33 series, built to a particular specification. Because the suffix controls construction details that influence running behavior, always confirm the full code before ordering.
You will find these bearings in metalworking, food and beverage plants, and general machinery building. They appear in machine tool spindles, centrifugal pumps, compressors and speed reducers. Their capacity to take load from either direction suits shafts that must stay axially located as operating conditions change.
Selection should start from the radial and axial loads the bearing will see, then the speed and the surrounding environment. Mounting calls for accurate alignment and, in many cases, preload adjustment to keep the assembly rigid. Grease or oil lubrication, applied as the manufacturer specifies, plays a large part in how long the bearing lasts.
On interchangeability, an SKF double row bearing with the ANR suffix can be swapped with another brand that uses the same dimensional designation, but tolerances and internal clearance may differ. A similar code from a different maker is not proof of identical characteristics, so check the technical data before fitting a replacement.
For a quote on an SKF double row angular contact bearing with the ANR suffix, send the complete code to MR Industrial Accessories by WhatsApp or email. The technical team can point you to the right option for your application and answer questions about mounting or interchangeability.
Dimensions
45 x 100 x 39.7 mm (d x D x B): boundary dimensions for basic designation 3309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 39.7mm
Frequently asked questions
- SKF 3309 ANR bearing: what are its dimensions?
- SKF 3309 ANR measures 45 mm across the bore and 100 mm across the outside diameter; its width is 39.7 mm (45 x 100 x 39.7 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 3309.
- What does the ANR suffix mean in an SKF bearing?
- It identifies a specific variant in the SKF designation, usually tied to sealing, internal clearance or cage design. Check the manufacturer's data sheet or ask us about your exact bearing.
- Can I replace a double row bearing with two single row ones?
- Sometimes it can be done, but it is not always the better route. A double row bearing occupies less axial space and gives higher rigidity. If you are considering the change, review loads, speed and available space with a specialist.
- How should I lubricate a double row angular contact bearing?
- It depends on the application: grease suits moderate speeds, oil is used for high speeds or elevated temperatures. Follow the manufacturer's instructions on lubricant type and quantity, and keep the mounting area clean.