About Luoyang Songju
Precision engineering and manufacturing excellence rooted in Luoyang, one of China's most historic bearing and machinery industrial centers.
Precision Manufacturing Since 2012
Founded in 2012 and headquartered in Luoyang, Henan Province, Luoyang Songju Science and Technology Co., Ltd. has grown into a leading manufacturer of high-precision core components for CNC machine tools. Our 22,000 m² state-of-the-art facility houses advanced CNC machining centers, high-precision grinding equipment, dynamic balancing machines, and comprehensive test benches.
With a dedicated team of over 60 employees including 10 senior engineers, Songju brings deep technical expertise to every project. Our chief engineer -- a State Council Special Allowance recipient holding multiple patents in spindle design -- led the development of China's first central-coolant high-power machining center spindle, a milestone achievement in domestic precision manufacturing.
We combine this engineering depth with rigorous quality control and a customer-first approach, delivering components that meet or exceed international standards across industries from aerospace and automotive to mold making and general precision machining.
Year Founded
Square Meters Facility
Skilled Employees
Senior Engineers
State Council Special Allowance
Our chief engineer is a nationally recognized expert in spindle technology
Inside Our 22,000 m² Production Facility
Real photos from our daily production — see the CNC machining centers, precision grinding stations, and quality control rooms where every component is made
CNC Machining Line
Numbered machines in systematic layout for high-volume precision production
22,000 m² Facility
Overhead cranes, organized workstations, and systematic material flow
CNC Machining Center
Multi-axis machining for spindle housings and shafts
Precision Turning
Micron-level tolerance on every spindle shaft
Cylindrical Grinding
Superfinishing for bearing seats and raceways
Skilled Workforce
60+ experienced technicians and 10 senior engineers
Quality Control
ISO 9001:2015 certified multi-stage inspection
Modern Facility
Clean environment with controlled assembly areas
Precision Inspection
Multi-stage quality control with CMM, roundness testers, and dynamic balancing equipment
Dynamic Balancing
CMM Inspection
Roundness Testing
Coordinate Measuring
Precision Assembly
Clean-room assembly environment with skilled technicians building spindles to exact specifications
Clean Room Assembly
Assembly Workshop
Finished Spindles
Quality Assembly Line
What We Build
Four specialized engineering domains covering the complete spectrum of CNC machine tool precision components
Precision Bearings
Angular contact ball bearings and cylindrical roller bearings in P4/P2 (ABEC-7/9) grades. Bore range 10mm to 500mm, optimized for machine tool spindle applications with controlled preload and high rigidity.
Motorized Spindles
0.5kW to 100kW power range, speeds up to 120,000 RPM. Synchronous and asynchronous motor types for machining centers, grinding machines, lathes, and special-purpose machine tools.
Linear Motion
Linear guideways in P/H/SP precision grades with 15mm to 65mm rail sizes. Ground ball screws in C3/C5 accuracy and rolled C7 grade, diameter range 8mm to 100mm per DIN 69051.
Custom Engineering
Bespoke spindle designs for OEM and retrofit applications. Our engineering team works from your specifications to deliver application-optimized solutions with full FEA analysis and performance validation.
Research-Driven Manufacturing
Innovation is at the core of Songju's competitive advantage. We maintain active research partnerships with leading Chinese universities to stay at the forefront of bearing dynamics, spindle thermodynamics, and precision manufacturing processes.
Henan University of Science and Technology
Joint research on bearing tribology and spindle dynamics
Dalian University of Technology
Collaborative development of high-speed spindle thermal management
Harbin Institute of Technology
Advanced materials and precision machining process optimization
Beijing Jiaotong University
Structural analysis and reliability engineering for rotating machinery
ISO 9001:2015 Certified
Quality management system audited and certified
Our ISO 9001:2015 certification underpins a quality-first culture. Every process from incoming raw material inspection through in-process control to final inspection follows documented procedures with traceable records.
Pre-Shipment Inspection
Every component undergoes comprehensive pre-shipment inspection including:
- Dynamic runout measurement (0.001mm resolution)
- Vibration spectrum analysis at full rated speed
- Temperature rise test under continuous rated operation
- Geometric accuracy verification per ISO 230 standards
- Full inspection report included with every shipment
Proven Performance Worldwide
Our components power CNC machine tools in factories across the globe, backed by measurable results
Precision units delivered in 2025
Quality acceptance rate
Long-term clients
Countries served
From the first electric spindle shipped in 2012 to over 5,000 precision units delivered in 2025, Songju has earned the trust of 37 long-term clients across more than 10 countries. Our 99.5% quality acceptance rate reflects an uncompromising commitment to excellence that keeps customers returning year after year.
The Songju Advantage
What sets us apart from other precision component manufacturers
Verified Quality
ISO 9001:2015 certified with 100% pre-shipment inspection. Every component ships with a documented test report including dynamic runout, vibration spectrum, and temperature rise data.
Reliable Delivery
Standard lead times of 15-30 days for catalog products. Custom engineered spindles delivered in 45-60 days. Flexible shipping by air, sea, or express courier with full export documentation.
24h Support
Guaranteed technical response within 24 hours. Direct access to senior engineers for application consultation, installation guidance, and troubleshooting throughout the product lifecycle.
Technical Depth
A team led by a State Council Special Allowance engineer holding multiple patents. China's first central-coolant high-power machining center spindle. University research partnerships and continuous R&D investment.
Precision Components for CNC Machine Tools
Explore our full range of high-precision components — from electric spindles to linear motion systems
Ready to Work Together?
Whether you need catalog products or a custom-engineered solution, our team is ready to support your project. Send us your specifications and receive a detailed quotation with technical recommendations within 24 hours.