LRT404520 Hardened Needle Roller Bearing Inner Ring Precision Ground Raceway 40x45x20mm Automation Transmission Sleeve

The LRT404520 is a standalone precision hardened inner race sleeve for machined needle roller bearings, standard dimension 40×45×20mm. It features fully superfinished inner raceway, high hardness and wear resistance, used when the shaft surface cannot be quenched and ground. It matches perfectly with TAF455520, RNAF456220, NAX4532 needle roller assemblies to form complete heavy radial load bearing units, widely applied in machine tools, automation transmission and compact gearbox equipment.

• Independent hardened inner ring solves the problem of unhardened shaft without grinding treatment
• Ultra-precision ground outer raceway reduces friction, guarantees smooth needle roller rolling
• Uniform heat treatment high hardness greatly improves wear resistance and service life
• Standard metric size fully interchangeable with universal LRT series inner rings
• Compatible with multiple needle roller cage assemblies for flexible equipment design
• Custom width, precision grade and anti-rust surface treatment can be produced on demand

This needle roller inner ring is widely matched to:

• CNC machine tool sliding axes and compact spindle transmission assemblies
• Small industrial gearboxes, hydraulic valve bodies and automation moving parts
• Textile machinery, packaging equipment and light construction rotary components
• General narrow-space mechanical structures requiring high radial load support

• 25+ years experience in LRT series needle roller inner ring manufacturing
• Exported to 50+ countries worldwide
• Rich OEM experience for matched needle bearing inner ring bulk orders
• Strict hardness, raceway roughness and dimensional tolerance inspection before shipment
• Fast professional technical reply within 24 hours
• Stable bulk supply for long-term machine tool and automation factory cooperation

• High chromium bearing steel raw material incoming hardness inspection
• Ultra-precision superfinishing for outer rolling raceway
• Standard quenching & tempering heat treatment for consistent surface hardness
• Roundness, straightness and dimensional tolerance full testing
• Anti-rust oil treatment and full recheck before packaging delivery