GQZ TR253825 Machined Needle Roller Bearing 25×38×25mm Without Inner Ring With Outer Ring Oil Hole

TR253825 is single-row machined cage needle roller bearing without inner ring, original IKO TR standard series model. It adopts high-rigidity integrated machined outer ring, stamped steel cage and dense needle roller layout. The quenched shaft journal surface directly serves as inner raceway to save radial installation space. Equipped with oil groove and lubrication hole on outer ring for convenient periodic grease replenishment, excellent heavy radial load capacity and stable high-speed operation performance, widely used in narrow-space compact transmission assemblies.

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Full load capacity datasheets and CAD drawings available on request

1. Inner-ring-free structure, utilize hardened shaft as rolling raceway, greatly reduce radial occupied space for miniaturized mechanical design
2. Dense needle roller arrangement provides outstanding radial bearing capacity under slim cross-section size
3. Thickened machined outer ring with high rigidity, no deformation even installed in light alloy housings under heavy load
4. Reserved circumferential oil groove and refuel hole on outer ring, realize online lubrication without disassembly, extend service cycle
5. Super-finished needle rollers and raceway reduce friction heat, vibration and noise during continuous high-speed rotation
6. Fully interchangeable with original IKO TR253825 for equipment aftermarket replacement
7. Custom precision grades P0/P6/P5, stainless steel version and OEM laser marking supported
8. 👉 Optimize equipment internal layout and lower regular maintenance frequency

• Small industrial gearboxes and compact speed reducers
• Precision automation equipment rotary transmission shafts
• Machine tool feed mechanism and auxiliary spindle support
• Automotive auxiliary transmission miniature shaft assemblies
• Textile, packaging machinery narrow-space rotating components
• Hydraulic pump, miniature motor rotor supporting parts

• 25+ years professional manufacturer of TR series machined needle roller bearings
• Exported to over 50 countries worldwide
• Strict hardness, dimensional tolerance and high-speed rotation aging test before delivery
• 24-hour technical support for compact mechanism matching and shaft heat treatment 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
• Precision superfinishing grinding for outer ring raceway and needle rollers
• Complete quenching & tempering heat stabilization process
• Oil hole processing inspection and high-speed temperature rise testing
• Full dimensional tolerance inspection for compact needle bearing sizes

Looking for TR253825 no-inner-ring needle roller bearings with lubrication hole?

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• Fast quotation within 24 hours
• Shaft surface hardness & roughness matching suggestion
• Custom high-speed low-friction grease options
• Competitive factory price

Contact our sales team for full technical datasheets and formal quotation