NTN 6312MALLB deep groove ball bearing
- Brand
- NTN
- Category
- Bearings
- Subcategory
- Deep groove ball bearings
- Series
- MA
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Decoding NTN 6312MALLB
- 63Series
- Deep groove ball bearings, 63 series. Series differ in outside diameter and width even when the bore is the same.
- 12Bore
- Bore 60 mm (12 × 5).
- MALLBSuffix
- NTN suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
6312 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NTN 6312MALLB measures 60 mm across the bore and 130 mm across the outside diameter; its width is 31 mm (60 x 130 x 31 mm).
NTN 6312MALLB belongs to deep groove 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 6312MALLB and any equivalents.
The NTN MA series is a single-row deep groove ball bearing with metal shield closure. It handles moderate radial and axial loads in both directions and is suited to dusty or dirty conditions where the higher friction torque of a rubber seal is not wanted. You will find it in electric motors, conveyors, pumps and similar equipment.
Reading the designation helps you order the right piece. The first digits give the size and dimension series, for example 6209, 6210, 6308, 6310 or 6312. The MA letters identify the metal shield version. In part numbers such as 6209MALLB, 6210MALLB, 6308MALLB, 6310MALLB and 6312MALLB, the MALLB suffix covers the closure configuration and possibly other internal features. Always confirm the full part number and the required dimensions before selecting.
Typical uses include electric motors, gearboxes, centrifugal pumps, fans, belt conveyors and agricultural machinery, in sectors such as food, chemical, mining and manufacturing. The combination of combined load capacity and resistance to contamination makes these bearings a practical choice for demanding environments.
When choosing, consider the radial and axial load, the rotation speed and the working conditions. The metal shield (MA) keeps out larger particles, but it does not retain liquid lubricant or block fine moisture; for very humid or wet areas, look at a rubber-sealed option instead. During mounting, align the shaft and housing precisely, apply the recommended lubricant, and avoid striking the balls or cage directly.
NTN MA series bearings are interchangeable with equivalent bearings from other brands that follow the same ISO dimensions. For a replacement, match the size code (for example, 6209) and the closure type (MA). If the original has an extra suffix such as MALLB, keep it to preserve the same configuration. We can advise on cross-references and help you pick the right bearing for the application.
To request a quote, send the complete part number (for example, 6209MALLB) or the shaft and housing dimensions by WhatsApp or email. We reply promptly and suggest a compatible alternative when needed.
Dimensions
60 x 130 x 31 mm (d x D x B): boundary dimensions for basic designation 6312, according to ISO 15.
- Bore
- 60 mm
- Outside diameter (D)
- 130mm
- Width (B)
- 31mm
SKF and other brands, same size
Other brands' pages with basic designation 6312: 60 x 130 x 31 mm (d x D x B) per ISO 15.
- Need the SKF 6312? We can also quote:63126312-Z6312 NR21 more →
- FAG6312-C6312-C-2Z6312-C-2HRS
- KOYO6312
- NSK63126312 ZZ
- RKB6312
- TIMKEN63126312MB
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
- NTN 6312MALLB bearing: what are its dimensions?
- NTN 6312MALLB measures 60 mm across the bore and 130 mm across the outside diameter; its width is 31 mm (60 x 130 x 31 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 6312.
- What does the MA suffix mean on an NTN bearing?
- It indicates metal shield closure. This protects against dust and particles but is not sealed against liquids, making it suitable for applications needing low friction and moderate protection.
- How do I identify the bearing I need?
- Use the complete part number on the original bearing, such as 6209MALLB. If it is not available, measure the shaft diameter, outer diameter and width, then contact us on WhatsApp for identification and a quote.
- Are they interchangeable with other brands?
- Yes, NTN MA series deep groove ball bearings follow standardized ISO dimensions, so they interchange with equivalent bearings from other brands that share the same size code and closure type. Ask us about equivalences.