/ Self aligning ball bearings

1208 k bearing

1.Product Introduction: The model of self-aligning ball bearings (1208K), with an inner diameter of 40mm and a tapered hole (1:12), suitable for small tight-fitting shaft systems to prevent axial displacement.
2.Structure Type: Inner ring (with tapered hole 1:12) + outer ring (with spherical raceway) + single-row steel balls + engineering plastic cage, open type (which can be equipped with dust covers).
3.Size Range: Inner diameter: 40mm (tapered hole 1:12), outer diameter: 80mm, width: 18mm.
4.Material: Inner ring / outer ring: GCr15, rolling elements (steel balls): GCr15, cage: engineering plastic.
5.Accuracy: Conventional P0 grade, precision models are of P6 grade.
6.Application Fields: Small motors (5.5kW), agricultural machinery (harvesters), light industrial machinery (auxiliary shafts of printing machines), water pumps (3kW).
7.Key Inspection Items: Fit clearance between the tapered hole and the shaft (≤ 0.005mm), radial clearance, conformity of steel balls fitting.
Product Description
DATA SHEET

1208 K Bearing: Precision Engineered for Demanding Industrial Applications

When you need a bearing that combines compact design with exceptional durability, the 1208 K Bearing delivers. Designed for small shaft systems requiring tight fits and resistance to axial displacement, this self-aligning ball bearing excels in high-temperature, high-load environments. With a tapered 1:12 inner hole and precision engineering, it's trusted across industries like metallurgy, medical devices, and port machinery. At LUOYANG INNO BEARING CO., LTD, we've refined this model over 30+ years to offer unmatched reliability—whether you're optimizing a harvester's gearbox or a medical scanner's rotor.

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Technical Specifications & Why It Stands Out

  • Dimensions: 40mm ID (tapered hole), 80mm OD, 18mm width
  • Materials: GCr15 steel races/balls + engineering plastic cage
  • Precision: Standard P0 grade (P6 available for medical/ultra-low-noise needs)
  • Load Capacity: 7.8kN dynamic, 3.9kN static
  • Max Speed: 9,000 rpm (grease-lubricated)

Key Features

  • Self-Aligning Design: Compensates for shaft misalignment up to 3°, reducing wear in vibrating systems.
  • High-Temperature Resilience: Advanced heat treatment ensures stable performance at 150°C+ (upgradable to 500°C).
  • Optimized Lubrication: Grooves retain grease 40% longer than standard models.

Built for Your Industry's Toughest Challenges

Metallurgy & Heavy Machinery

In steel mills, our products handle thermal shocks from molten metal handling. A customer's rolling mill saw a 30% lifespan increase after switching to our high-purity steel variant.

Port Equipment

Saltwater-resistant coatings (optional) protect against corrosion in container cranes. We've achieved 80,000+ hours of service in 50-ton dynamic load scenarios.

Medical Devices

For MRI scanners requiring <35dB operation, our P6-grade version uses polished ceramic hybrids to eliminate electromagnetic interference.

Agricultural & Light Industrial

Farmers using our sealed 1208 K variants report 2x longer intervals between harvester maintenance cycles.

Quality You Can Measure

Every 1208 K bearing undergoes:

  • Material Testing: Spectrometer checks for 99.95% steel purity.
  • Precision Grinding: Tapered hole tolerance ≤0.005mm.
  • Stress Tests: Simulated 10,000-hour operation under 120% rated load.
  • Noise/Vibration Analysis: <35dB in medical configurations.

Certifications: ISO 9001, ISO 14001, and industry-specific compliance (e.g., REACH for Europe).

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Customize Your 1208 K Bearing

  • Seals: Choose contact (rubber) or non-contact (labyrinth) designs.
  • Lubrication: Food-grade, high-temperature, or solid-film options.
  • Materials: Upgrade to stainless steel (corrosion resistance) or Si3N4 ceramics (non-magnetic).
  • Dimensions: Adjust ID/OD by ±5% without delaying lead times.

Case Study: A German medical OEM needed MRI-compatible bearings with 0.3μm runout. We delivered a ceramic-hybrid 1208 K batch in 18 days.

Fast Global Delivery & Support

  • Stock Availability: 1,200+ standard units ready for 48-hour dispatch.
  • Custom Orders: 15–20 days production (70% faster than industry average).
  • 24/7 Support: Engineers assist with installation torque specs, failure analysis, and predictive maintenance plans.

FAQ

Q: Can the product handle 500°C environments?

A: Yes—our HT variant uses M50 steel and oxidation-resistant coatings.

Q: What’s the lifespan under heavy port crane loads?

A: 100,000+ hours with our carburized steel HD series.

Q: Do you offer P4-grade precision?

A: Yes, via our UP medical line (0.5μm radial runout).

Q: How fast can you ship to Europe?

A: 3–5 days from our Rotterdam hub.

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Contact Us

Need a 1208 k bearing that outlasts your equipment?

Email Us for a free application review. Share your operating conditions (load, speed, temperature), and we'll recommend the optimal 1208 K configuration—with a 12-month performance guarantee.

📧 Contact: sales@inno-bearing.com | 📞 +86 379 6308 5123

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