NTN 30313U2GB tapered roller bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
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Decoding NTN 30313U2GB
- 303Series
- Tapered roller bearings, 303 series. Series differ in outside diameter and width even when the bore is the same.
- 13Bore
- Bore 65 mm (13 × 5).
- U2GBSuffix
- NTN suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
30313 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 30313U2GB measures 65 mm across the bore and 140 mm across the outside diameter; its total width is 36 mm (65 x 140 x 36 mm).
NTN 30313U2GB 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 30313U2GB and any equivalents.
Tapered roller bearings in the NTN U GB series are single-row units built to carry radial load together with thrust in one direction. Their angled raceways and the slanted contact line between rollers and races spread the force across a wider area than a deep groove ball bearing can. Shafts in transmissions, reducers and plant machinery rely on them, normally fitted in pairs or matched sets to hold position and take combined forces.
Reading the code helps when you order. The leading digits set the size and dimensional series; the U and GB suffixes describe the internal design and how the assembly is finished. Compare 30313U2GB, 30314U2GB, 30315U2GB, 30316U2GB and 30317U2GB: the size step follows the number, while the suffix stays the same. Always quote the full code found on the part or the drawing so the replacement matches.
Typical duty covers gearboxes, pumps, fans, conveyors, road machinery, milling equipment and rolling mill trains, plus food plants and aggregate processing where the shaft sees radial load and axial thrust at once. Since the components separate, rollers and raceways can be inspected and worn parts swapped without scrapping the whole assembly.
Selection starts with four inputs: radial load, axial load, rotation speed and shaft diameter, along with the fit type. Press or controlled heat brings the bearing into place; striking the cage or rollers is never acceptable. Grease or oil has to reach rollers and raceways, and how the two rows line up sets the axial clearance. Good sealing keeps dust and water out, which is what shortens raceway life.
Cross-brand replacement works on dimensions and series code. A tapered bearing from another maker with matching bore and outside diameter can go in, though the contact angle and suffix deserve a check. Have the old part or another brand's code? Send it over WhatsApp and we will come back with the NTN reference or the exact size.
Dimensions
65 x 140 x 36 mm (d x D x T): boundary dimensions for basic designation 30313, according to ISO 355.
- Bore
- 65 mm
- Outside diameter (D)
- 140mm
- Total width (T)
- 36mm
SKF and other brands, same size
Other brands' pages with basic designation 30313: 65 x 140 x 36 mm (d x D x T) per ISO 355.
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 30313U2GB bearing: what are its dimensions?
- NTN 30313U2GB measures 65 mm across the bore and 140 mm across the outside diameter; its total width is 36 mm (65 x 140 x 36 mm). Those are the boundary dimensions standardized in ISO 355 for basic designation 30313.
- What does the U GB suffix tell me about an NTN tapered bearing?
- It points to the internal design and the assembly finish used in that series. Give us the complete code, such as 30314U2GB, and we will quote that exact reference.
- How should a tapered roller bearing be mounted?
- Use a press or controlled heating and keep the cage and rollers free of impact. The way the two rows align determines axial clearance, and raceways and rollers need lubrication before the assembly is closed.
- Can another brand's tapered bearing be replaced with an NTN one?
- When shaft and housing dimensions line up, yes. Check the contact angle and the suffix. Send the code you have on WhatsApp and we will point you to the NTN equivalent.