NTN 30312U2FB tapered roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
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Decoding NTN 30312U2FB
- 303Series
- Tapered roller bearings, 303 series. Series differ in outside diameter and width even when the bore is the same.
- 12Bore
- Bore 60 mm (12 × 5).
- U2FBSuffix
- NTN suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
30312 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 30312U2FB measures 60 mm across the bore and 130 mm across the outside diameter; its total width is 33.5 mm (60 x 130 x 33.5 mm).
NTN 30312U2FB belongs to tapered roller 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 30312U2FB and any equivalents.
NTN U FB series tapered roller bearings handle both radial and axial forces at the same time. The tapered design creates a linear contact path that spreads the load across a wider area, which gives the bearing high capacity and stiffness. You will find them in gearboxes, transmission shafts and other industrial equipment where precision and long service matter. MR Industrial Accessories supplies this series to customers across the United States and Latin America.
Reading the code helps you pick the right variant. Take 30312U2FB: the numeric portion sets the dimensions, while the U2FB suffix points to internal details like contact angle or cage type. The U typically marks a special execution, and FB relates to a specific cage or tolerance class. Knowing how these letters and numbers combine is the first step in matching a bearing to your application.
These bearings show up in food processing, metallurgy and mining operations. Speed reducers, machine tools, pumps and conveying systems rely on them. Because they tolerate combined loads, they suit assemblies where the shaft sees axial and radial forces at once. That makes them a common pick for demanding industrial duties.
Selection comes down to sealing type, internal clearance and lubrication. Getting the alignment right during mounting is critical to avoid early wear. Tapered roller bearings are often installed in pairs with preload adjustment so they work as intended. Whether you use grease or oil, proper lubrication stretches service life and cuts maintenance.
Interchangeability is possible between manufacturers when dimensions and tolerances line up. Check the technical data and cage design before substituting. If you are replacing a bearing from another brand, we can help you find a compatible reference. MR Industrial Accessories guides you so the swap is safe and efficient.
To get a quote, send the part number or size through WhatsApp or email. We respond promptly with information and possible alternatives. At MR Industrial Accessories, we aim to help you find the right part for your equipment, with quality brands such as NTN.
Dimensions
60 x 130 x 33.5 mm (d x D x T): boundary dimensions for basic designation 30312, according to ISO 355.
- Bore
- 60 mm
- Outside diameter (D)
- 130mm
- Total width (T)
- 33.5mm
SKF and other brands, same size
Other brands' pages with basic designation 30312: 60 x 130 x 33.5 mm (d x D x T) per ISO 355.
- Need the SKF 30312? We can also quote:30312 J2/Q30312/VA983
- FAG30312-XL
- RKB30312
- TIMKEN30312
What they share are the ISO 355 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
- NTN 30312U2FB bearing: what are its dimensions?
- NTN 30312U2FB measures 60 mm across the bore and 130 mm across the outside diameter; its total width is 33.5 mm (60 x 130 x 33.5 mm). Those are the boundary dimensions standardized in ISO 355 for basic designation 30312.
- What does the U2FB suffix mean on an NTN bearing?
- The U2FB suffix covers design details such as contact angle or cage type. You need the full designation and the NTN catalog specifications to interpret it correctly. We can help you identify the exact variant.
- How are tapered roller bearings mounted?
- They are usually mounted in pairs with preload adjustment to handle loads in both directions. Correct alignment of shaft and housing, plus proper lubrication, is essential. Follow the manufacturer's recommendations for best performance.
- Can I replace a bearing from another brand with an NTN one?
- Yes, if dimensions and tolerances match. Tapered roller bearings are interchangeable between manufacturers when specifications are equivalent. Send us the original part code and we will tell you the compatible NTN reference.