Electric Spindles
(Motorized Spindles)
0.001mm runout / 0.5–100 kW / Up to 120,000 RPM
Precision Electric Spindles for Demanding Applications
Luoyang Songju electric spindles (motorized spindles) integrate the motor rotor directly onto the spindle shaft, eliminating belts, gears, and couplings. This direct-drive architecture delivers superior rigidity, reduced vibration, and exceptional rotational accuracy. Each spindle undergoes dynamic balancing, thermal stability testing, and runout verification before shipment.
Application Areas
CNC Machining Centers
Milling, drilling, tapping, boring for vertical and horizontal machining centers
Precision Grinding
External cylindrical, internal bore, surface, and centerless grinding
High-Speed Motor Applications
Direct-drive rotary tables, high-speed spindles for PCB drilling, dental milling
Deep Hole Drilling
Gun drilling, BTA drilling for mold bases, hydraulic blocks, and aerospace components
Milling & Machining Center Spindles
Synchronous motor spindles engineered for vertical and horizontal CNC machining centers. High torque at low RPM with wide constant-power range. Suitable for heavy cutting, high-speed milling, drilling, tapping, and boring operations across steel, aluminum, titanium, and composites.
287XDJ10G75
260XDJ15G45
230XDJ15G35
230XDJ12G40
210XDJ24Y32
210XDJ15G15
170XDJ10G52 HSKA80
120XDJ24G12
120XDJ42Q17
125XDJ32G16
150XDJ15G26
160XDJ18G18
170XDJ10G50
170MD30Y20 HC63
Precision Grinding Spindles
Ultra-high-precision spindles designed for surface, external cylindrical, internal bore, and centerless grinding operations. Ceramic hybrid bearings ensure sub-micron runout and exceptional surface finish quality. Available in a range of speeds from 6,000 to 120,000 RPM.
External Grinding Spindles
Designed for cylindrical grinding of shafts, rolls, and rotating components. High stiffness for heavy stock removal with superior roundness and straightness.
155MD06G19
170MD05G14B
250MD06G32
Internal Grinding Spindles
Compact-design spindles for bore grinding, internal raceway grinding, and micro-hole finishing. Speeds up to 120,000 RPM for the finest internal surface finishes.
120MD45Y15
100MD90Y2.5
100MD60Y7.5
80MD120Y1.5
150MD35Y32
170XDJ12G40 HC80
190XDJ08G52.5 HC100
High Speed Motors
Direct-drive high-speed motors for applications requiring exceptional power density and rotational speed. Used as spindle drives, test rig prime movers, and specialized industrial drives. Available in synchronous and asynchronous configurations.
Gun Drill Spindles
Specialized spindles for deep hole drilling applications including gun drilling and BTA drilling. Designed for high-pressure coolant through-tool delivery with superior chip evacuation. Ideal for mold bases, hydraulic manifolds, and aerospace structural components.
Engineering Excellence in Every Rotation
From material selection to final dynamic balancing, every Songju electric spindle is built to deliver consistent performance in 24/7 production environments.
Sub-Micron Accuracy
Every spindle is individually tested for runout using laser interferometry. Maximum runout does not exceed 0.001mm at the tool interface, ensuring superior surface finish and extended tool life.
Advanced Thermal Management
Spiral water jacket cooling channels maintain stable operating temperature even under continuous heavy cutting. Thermal growth is minimized to preserve dimensional accuracy throughout the machining cycle.
Ceramic Hybrid Bearings
Silicon nitride (Si3N4) ceramic rolling elements paired with high-grade steel races. Lower friction, higher stiffness, longer grease life, and superior high-speed capability compared to all-steel bearings.
Oil-Air Lubrication
Precision oil-air or oil-mist lubrication systems deliver metered lubricant directly to each bearing. This extends bearing service intervals and maintains optimal film thickness at all speeds.
Dynamic Balancing
Each rotor assembly is dynamically balanced to G0.4 grade or better. Multi-plane balancing eliminates residual imbalance, reducing vibration and bearing wear across the entire speed range.
Custom Engineering
Need a specific flange, shaft extension, sensor package, or speed range? Our engineering team modifies standard designs or creates fully custom spindles to match your exact machine requirements.
Need a Custom Spindle Configuration?
Tell us your required power, speed, tool interface, and cooling method. Our engineers will recommend the optimal spindle solution with detailed technical specifications and competitive pricing. 24-hour response guaranteed.