624704 Full Needle Roller Bearing 25×35×25mm No Inner Ring Heavy Radial Load Compact Transmission

1. Product Overview

The 624704 is full complement needle roller bearing without inner ring, also named NK253525, featuring dense arrangement of needle rollers without cage. It abandons independent inner ring and directly uses hardened shaft surface as inner raceway, greatly shrinking radial installation space. Massive needle rollers bring outstanding radial load capacity and high rigidity, only bear pure radial load with almost no axial bearing capacity. Open structure supports convenient re-lubrication and excellent heat dissipation, widely used for compact gearboxes, automation sliding components, textile machinery, hydraulic equipment and light lifting transmission assemblies with limited radial dimension.

Get a quote within 24 hours for your project

2. Technical Specifications

3. Key Advantages

• No independent inner ring design minimizes radial overall size, perfect for equipment with strict radial space restriction
• Cage-free full needle layout maximizes roller quantity, realizes ultra-high radial load capacity and structural rigidity under heavy impact load
• Open uncovered structure allows easy on-site refueling and outstanding heat dissipation, avoiding overheating during continuous medium-speed operation
• Simple split assembly structure reduces spare part types and lowers overall equipment manufacturing cost
• Compact width dimension fits narrow transmission slide rail and gearbox internal mounting positions
• Customizable options include single/double side rubber seals, C3 enlarged clearance, OEM laser marking and special anti-rust treatment

Effectively reduce equipment radial occupied space and improve heavy-load transmission stability

4. Applications

This bearing is widely matched for the following compact light & medium industrial equipment:

• Miniature gearbox intermediate and output sliding transmission assemblies
• Automation equipment linear sliding support and cam rotary components
• Textile looms, printing small machinery tension transmission parts
• Hydraulic valve core, oil pump lightweight rotary sliding units
• Light lifting machinery, forklift auxiliary roller and winch small transmission shafts
• Aftermarket replacement spare parts for no-inner-ring full needle roller bearing equipment

Ideal compact heavy radial load bearing solution for narrow installation space industrial transmission equipment

5. Why Choose GQZ Bearing

• 25 years of professional full complement needle roller bearing manufacturing experience
• Products exported to more than 50 countries and regions worldwide, fully interchangeable with standard NK series no-inner-ring needle bearings
• Rich experience in OEM, ODM and sealed full needle customized bearing production
• Complete raw material inspection and finished product full load, rotation flexibility testing before delivery
• Professional engineering team provides one-on-one shaft matching technical support within 24 hours
• Stable mass production capacity with preferential wholesale price for long-term bulk cooperation

We focus on stable dimensional tolerance, consistent heavy-load performance and long-term win-win partnerships with global industrial buyers

6. Quality Control

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision turning and mirror superfinishing processing for outer ring raceway
• Standardized constant temperature heat treatment process to stabilize internal metal stress and improve wear resistance
• Comprehensive testing covering radial clearance, roller arrangement uniformity, dynamic/static load capacity and rotation flexibility
• Final outer ring dimension, appearance and marking re-inspection before packaging and shipment

Every batch of bearings passes full sampling inspection to guarantee uniform stable heavy radial load operation

7. Get a Quote Now

If you need high-quality 624704 no inner ring full complement needle roller bearings for compact gearbox and automation transmission equipment, send your inquiry to us directly.

You will receive full supporting professional services after submitting inquiry:

• Fast official factory quotation reply within 24 hours
• Targeted shaft hardness and surface finish matching guidance by professional bearing engineers
• Customized bearing solution suggestions including sealed variants and special clearance options
• Competitive direct factory bulk wholesale price

Send your demand and order quantity to us to obtain detailed formal offer

8. FAQ