GQZ LRT252930 Precision Ground Needle Roller Inner Ring 25×29×30mm For Compact Transmission Assemblies

LRT252930 is standard high-precision ground inner ring of LRT metric series, specially matched with TAF293830 needle roller bearing. It acts as independent rolling raceway when the matched shaft cannot reach HRC60 hardness and mirror grinding finish. The whole body is quenched and superfinished, featuring low friction and wear resistance. Widely combined with TAF, TR, NK series inner-ring-free needle bearings for narrow-space compact rotary mechanisms.

Model: LRT252930

Dimension: Bore d=25mm, Race diameter F=29mm, Width B=30mm

Net weight: 0.038kg

Matching needle bearing: TAF293830

Min fillet radius rs: 0.3mm

Surface hardness: HRC60~64

Surface finish: Mirror superfinishing grinding

Structure: Smooth cylindrical sleeve without oil holes, loose taper relief at both ends for easy assembly

Material: GCr15 chrome bearing steel

Full dimensional drawings and matching bearing parameter sheets available on request

1. High-hardness fully ground raceway solves the problem of unqualified shaft hardness and roughness, no extra shaft heat treatment required
2. Standard size perfectly interchangeable with original IKO LRT252930, fully compatible with TAF293830 needle roller units
3. Ultra-slim thin-wall structure occupies minimum radial space, ideal for miniaturized mechanical layout
4. Double-end taper relief design reduces assembly friction, convenient for quick installation and disassembly
5. Superfinished raceway surface cuts vibration, noise and heat generation during continuous high-speed rotation
6. Can be used separately as wear-resistant bushing without matching needle rollers
7. Custom stainless steel inner rings, OEM laser marking and P6/P5 high-precision grinding tolerance supported 👉 Save shaft processing cost and extend service life of needle bearing assemblies

• Compact industrial small gearboxes and miniature speed reducers
• Precision automation rotary transmission shafts
• Machine tool feed auxiliary spindle support
• Automotive auxiliary transmission needle bearing sets
• Textile, packaging narrow-space rotating components
• Hydraulic pump, miniature motor rotor supporting assemblies

• 25+ years professional manufacturer of LRT series needle roller inner rings
• Exported to over 50 countries worldwide
• Strict hardness, roundness, cylindricity and surface roughness inspection before delivery
• 24-hour technical support for bearing set matching and assembly guidance
• Stable bulk stock supply for automation, gearbox and machinery distributors 👉 We focus on quality, reliability, and long-term partnership

• GCr15 raw material metallurgy & hardness inspection
• Complete quenching & tempering heat stabilization process
• Double-pass superfinishing grinding for outer rolling surface
• Roundness and surface roughness precision testing
• Full dimensional tolerance inspection for thin-wall inner sleeves

Looking for LRT252930 hardened ground needle roller inner rings matched with TAF293830?

• Fast quotation within 24 hours
• Complete needle bearing matching parameter suggestion
• Custom stainless steel and ultra-precision grinding options
• Competitive factory price

Contact our sales team for full technical datasheets and formal quotation