UC202 Insert Bearing Pillow Block – NTN NSK Timken Koyo

Product Specifications

Application Suitability

Need a Reliable 21311 Insert Bearing Pillow Block? Here’s What Matters

Finding the right bearing for your equipment can be frustrating—mismatched dimensions lead to installation delays, while low-quality bearings cause premature wear and unexpected downtime. Sourcing from multiple suppliers for different brands only adds to the complexity, wasting valuable time better spent on core operations.

Built for Consistent Performance in Demanding Environments

Our 21311 insert bearing pillow block addresses these challenges with a design optimized for reliability. As a supplier with ISO 9001-certified production processes, we ensure each unit meets strict quality standards, from raw material inspection to final dimensional testing. With rich stocks available, we support quick turnaround for urgent replacements, whether you need a single unit or bulk orders. This bearing’s double row roller structure makes it ideal for heavy radial loads in applications like conveyor drives and mining equipment, where stability under stress is non-negotiable.

Engineered for High-Load, High-Speed Conditions

This aligning radial bearing excels in environments with moderate misalignment, thanks to its spherical outer ring design that compensates for shaft deflection. Operating at speeds up to industry standards for roller bearings, it maintains low noise levels even under continuous use—critical for factory floors and precision machinery. The bearing steel construction ensures durability in temperatures ranging from ambient to typical industrial operating conditions, resisting wear in dusty or humid environments common in mining and steel sectors.

Key Engineering Features That Impact Performance

The 21311’s 55mm bore diameter, 120mm outer diameter, and 29mm width follow international dimensional standards, ensuring interchangeability with major brands. Its precision rating options (from P0 to P2) allow customization—choose P5 or P4 for high-speed applications like automated production lines, where reduced vibration is essential. Clearance grades C0 (standard), C3, and C4 accommodate thermal expansion in different operating conditions; C3 is recommended for high-temperature environments to prevent binding. The unseparated design simplifies installation and maintenance, reducing assembly time compared to split-bearing alternatives.

Why Choosing the Right Bearing Lowers Total Costs

Opting for a low-cost, uncertified bearing may save upfront, but the hidden costs add up: early failure leads to production downtime, replacement labor, and potential damage to adjacent components. Our bearing’s long-life design, backed by material hardness testing (HRC 58-62 as standard for bearing steel), reduces replacement frequency. By aligning load capacity with application needs—its double row structure handles higher radial loads than single row alternatives—you avoid over-specifying and unnecessary expense, while ensuring reliable performance that contributes to lower total cost of ownership.

Quality You Can Trust in Every Unit

Packaging & Shipping

• Packaged in cartons with palletized options for bulk orders
• Rich stock availability ensures prompt dispatch for urgent requirements
• Flexible shipping via sea, air, or express courier based on your timeline
• Low minimum order quantity supported, ideal for both maintenance and production needs

Get Your 21311 Bearing Quote Today

Whether you need this 21311 insert bearing pillow block or another model, provide your required specifications—model number, dimensions, quantity, and destination—and we’ll deliver a competitive quote with lead time. With our extensive brand coverage and technical support, we simplify your bearing procurement process, ensuring you get the right part when you need it.

Frequently Asked Questions