Special Bearing NBC AXXX to TXXX series

1. AST / ASTB / ASTN / ASTBG Series

These are special application bearings — not standard deep groove types.

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  AST / ASTB / ASTN / ASTBG denote NBC’s customized angular contact, special geometry, or hybrid steel combinations used in machine tools, aerospace, or automotive fans.
  
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  Features:
  
  
  High-speed and high-temperature performance.
  
  
  Precision grades (P5, P6, or P4).
  
  
  Special internal clearances (C3, CS23).
  
  
  Often paired or duplex matched for axial/radial load balance.
  
  
  

🧭 2. BB10XX Series

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  These are miniature or instrument bearings (used in motors, blowers, fans, etc.).
  
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  NBC versions are known for:
  
  
  Quiet operation.
  
  
  Low torque and tight dimensional tolerances.
  
  
  Sealed or shielded variants for longer life.
  
  
  

🔩 3. CR Series (CR-6307LLU, CR-805345, etc.)

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  “CR” usually stands for Customer Requirement or Custom Reference bearings — often designed for OEM machinery, fan assemblies, or automotive alternators.
  
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  NBC’s CR-type bearings have:
  
  
  Special seals (LLU, CT2X, TC fan type).
  
  
  Modified grease fill for specific duty cycles.
  
  
  Exact fits for fan support or clutch pulley systems.
  
  
  

🔧 4. JPU Series (JPU51-15, JPU52-128+JF434)

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  NBC journal pivot units — used in precision spindles or universal joint assemblies.
  
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  High load capacity with hardened raceways and custom lubricant.
  

🧱 5. LS Series (LS10–LS15, LS8Z, etc.)

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  Spherical plain bearings / thrust washers / rod-end inserts.
  
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  These are NBC equivalents of SKF “GE” or INA “LS” series.
  
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  Used in linkages and pivot joints.
  
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  Special NBC advantages:
  
  
  Phosphated or PTFE-lined for self-lubrication.
  
  
  High misalignment tolerance.
  
  
  

🔩 6. ML Series (ML6203, ML6209, etc.)

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  Standard deep groove ball bearings, but the “ML” prefix indicates lightweight or machine line bearings.
  
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  NBC’s ML bearings are:
  
  
  Optimized for low vibration and quiet performance.
  
  
  Available in P6 precision class (for electric motors).
  
  
  CN or C3 clearance options for temperature 
  
  
  

N1272RSS / N1366 / N1422Needle or cylindrical roller bearingsCompact design for gearboxes and machine tools. NBC versions use case-hardened rollers and precision cages for high rigidity and low friction.RLS10 / RLS20 / RLS32RLS (inch series deep groove ball bearings)Used in older British/US machinery and spindles. NBC makes interchangeable RLS types with improved sealing and P6 precision.S7 / S8 / S10Thrust ball bearingsHandle axial loads in one direction. NBC’s S-series thrust bearings are made with hardened washers and optimized ball conformity for low noise.SP6003 / SP6006 / SP6203ZSpecial Precision (SP) deep groove bearings“SP” indicates Special Precision class – used in spindles, fans, and small electric motors. NBC SP series are P6 or P5 class, low vibration and heat stabilized.SP63/28 / SP63/28 C3 / SP6307LLUHigh-speed deep groove bearings with enhanced grease and clearanceThe C3 clearance allows for thermal expansion at high RPM. LLU means double-lip seal (dust and moisture resistant).TM6210LUNR / TM63/32LLHAN C3 / TM6306/25T2XLLUN“TM” series – Transmission or special machine bearingsNBC makes TM bearings for industrial gearboxes, alternators, or transmission housings. LLHAN / T2X / LUNR denote custom seal and cage materials for endurance.TMB6002 / TMB6002Z / TMB6005 / TMB6007 / TMB6202 / TMB6203A/42 / TMB6203A/42LU / TMB6203LLUTMB = “Tapered/Modified Ball” or “Tight Motor Bearing”

These are motor-grade precision deep groove bearings. NBC TMB bearings are electrical motor quality with:

P6 tolerance

Noise/vibration tested

Greased-for-life seals (LLU, Improved surface finish and low torque design Ideal for fan motors, alternators, and small induction motors.