OBURSSI / Oubaisi Rotary Unions and Fluid Feed Solutions

OBURSSI / Oubaisi is a specialized manufacturer of high-speed rotating unions, R01-12-03S joint assemblies, and shuttle valves for CNC machine tools. Precision fluid transfer for spindle tooling.

OBURSSI / Oubaisi R01-12-03S High-Speed Rotary Unions

Precision rotary unions OBURSSI / Oubaisi R01 series deliver stable cutting fluid and air delivery into CNC machine spindles. Mechanical face seals with labyrinth protection prevent fluid leaks during high-speed spindle rotation, keeping internal motor bearings protected.

Maximum continuous operating rotational speed reaches 12000 and 16000 rpm limits
Permissible cutting fluid pressure reaches 80 bar with dependable sealing barrier
Integrated drain port protection and labyrinth barrier against external contamination
Optimized five millimeter passage aperture provides stable fluid flow efficiency

OBURSSI / Oubaisi VA10-PT3 and VA20-PT3 Shuttle Valve Kits

OBURSSI / Oubaisi shuttle valve kits VA10 and VA20 series enable automated switching between cutting fluid feed and compressed air blast via machine M-codes. The dedicated mounting bracket design prevents external hose tension from transferring onto the precision rotating union.

Rated fluid switching operating pressure reaches 10 MPa and 20 MPa respectively
L-shaped adjustable mounting plate ensures accurate alignment of fluid delivery lines
Reinforced flexible hose assembly absorbs vibration loads from machine feed pipes
Instantaneous transition between internal tool cooling and workpiece air cleaning

OBURSSI / Oubaisi R02 Deep Hole High-Pressure Rotary Unions

OBURSSI / Oubaisi R02 series rotary unions feature enlarged flow channels engineered for deep hole drilling and high-flow tool cooling. Reinforced mechanical sealing surfaces withstand continuous cutting fluid pressure up to 120 bar, maintaining integrity under heavy cutting feeds.

Enlarged nine millimeter channel aperture accommodates high fluid volume flow rates
Maximum cutting fluid operating pressure reaches 120 bar for deep hole drilling tools
Precision shielded ball bearings stabilize dynamic rotation up to 16000 rpm limits
Dry run capability on compressed air media with minimal quantity lubrication support

OBURSSI / Oubaisi R03 Ball Screw Cooling Rotary Unions

Specialized OBURSSI / Oubaisi R03 rotary unions install on the ends of precision ball screws to circulate coolant through the inner hollow shaft. Effective thermal stabilization offsets shaft thermal elongation, preserving micro-level axis positioning repeatability under high feed rates.

Direct end mounting onto precision rotating ball screw shafts of CNC machine axes
Thermal elongation offset preserving mechanical lead accuracy during prolonged cycles
Compact outer housing geometry fitting tight clearances within machine slide saddles
Low running torque seal design minimizes parasitic drag on precision servo drive motors

OBURSSI / Oubaisi R04 Swing Head Spindle Rotary Unions

OBURSSI / Oubaisi R04 rotary unions are tailored for multi-axis CNC machines equipped with tilting spindle heads and hollow-shaft motors. The compact geometry ensures continuous fluid and pneumatic delivery through tilting axes without line pinching or mechanical binding.

Dedicated structural layout for seamless integration into 5-axis tilting milling heads
Direct compatibility with hollow-rotor torque motors and electrospindle packages
Silicon carbide sealing rings deliver high wear resistance against abrasive debris
Reliable performance in machining glass, structural ceramics, and hardened steel alloys

OBURSSI / Oubaisi R08 and R09 Ultra High-Pressure Unions

High-pressure rotary unions OBURSSI / Oubaisi R08 and R09 series are built for high-speed motorized electrospindles and hydraulic feeds running up to 150 bar. Advanced ceramic sealing rings prevent thermal build-up along dynamic contact faces during extended high-speed milling.

Extreme cutting fluid system operating pressure withstands up to 150 bar ratings
Dynamic balanced rotor assembly prevents harmful vibration in high-speed spindles
Advanced ceramic tribological pairs maintain low thermal generation at high surface velocity
Dependable media transfer in precision CNC grinding, drilling, and high-speed milling

Design and Sealing Principles of OBURSSI R01-12-03S Rotary Unions

OBURSSI / Oubaisi R01 and R02 series precision rotary unions are engineered for high-speed cutting fluid and compressed air feed into CNC machine spindles. The R01-12-03S design accommodates continuous rotation up to 12000 and 16000 rpm under cutting fluid pressures reaching 80 bar.

Mechanical face seals paired with a labyrinth barrier prevent fluid ingress into the drive motor bearings. An auxiliary drain channel safely routes micro-leakage during rapid pressure shifts, keeping electric motor windings dry.

The five millimeter internal flow passage is optimized for steady media delivery without excessive turbulence.

Automated Media Switching Assemblies with VA10 and VA20 Shuttle Valves

Automatic media switching powered by OBURSSI / Oubaisi VA10-PT3 and VA20-PT3 shuttle valves provides rapid selection between cutting fluid delivery and air blast via CNC M-codes. Operating switching pressure reaches 10 MPa for VA10 units and 20 MPa for VA20 models during heavy milling routines.

An adjustable L-shaped mounting bracket secures the valve body directly to the stationary spindle shroud, isolating the rotating union from axial hose pull. Flexible high-pressure tubing absorbs hydraulic power unit vibration and maintains proper port alignment.

High-Pressure Deep Hole Drilling Rotary Unions R02 with 9mm Aperture

High-pressure deep hole drilling rotary unions from OBURSSI / Oubaisi R02 series accommodate high flow rates during deep cavity machining. The enlarged nine millimeter internal aperture reduces flow resistance and prevents cavitation under pressures up to 120 bar.

Precision shielded ball bearings stabilize the rotor at speeds up to 16000 rpm, eliminating radial runout along hard face seals. Special silicon carbide sealing ring geometry enables dry running on compressed air with minimal lubrication.

R03 Series Ball Screw Core Cooling Unions for Machine Feed Drives

OBURSSI / Oubaisi R03 series cooling rotary unions install directly onto hollow ball screw shafts on CNC feed axes to circulate coolant through the drive screw core.

Thermal stabilization of feed drives offsets axis thermal elongation and preserves slide positioning repeatability during long high-speed cycles. Compact outer housing dimensions allow easy integration into crowded axis slide spaces without modifying baseline motor mounts.

A low-friction face seal design prevents extra heat generation along the screw and lightens the load on feed servomotors.

Five-Axis R04 Rotary Unions for Tilting Milling Spindle Heads

Five-axis rotary unions from OBURSSI / Oubaisi R04 series are tailored for tilting milling spindle heads and hollow-shaft torque motors. A compact radial layout prevents external fluid hoses from twisting or binding when the spindle head tilts up to one hundred twenty degrees.

Ceramic friction rings offer high hardness and wear resistance against abrasive slurry particles when machining optical glass, structural ceramics, and hardened tooling alloys. The assembly maintains stable media flow without system pressure loss.

R08 and R09 Ultra High-Pressure Unions for Motorized Grinding Spindles

Extreme high-pressure rotary unions OBURSSI / Oubaisi R08 and R09 series are built for motorized grinding spindles operating at fluid pressures up to 150 bar.

Precision dynamic balancing of all rotating elements eliminates harmful harmonic vibration and shields spindle bearings against high-frequency fatigue. Composite ceramic friction rings with high thermal conductivity prevent thermal shock across contact lips when coolant turns on at top speed.

The unit guarantees uninterrupted circulation of synthetic oils and water-based emulsions without leakage.

OBURSSI / Oubaisi and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of OBURSSI / Oubaisi and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.