06 1101-235-238 Deeu Biln 902-138-188

• Customization: Available
• Certification: ISO
• Color: Other
• Model NO.: 902-138-188
• Customized: Non-Customized
• Standard: International
• Type: Connection
• Material: Plastic
• Specification: 50*50*50
• Trademark: KONECRANES
• Origin: USA

Product Description

1. Product Overview

The Deublin 902-111-165 belongs to the classic 902 Series Pop-Off™ high-speed rotary unions specially engineered for CNC machine tool coolant and MQL (Minimum Quantity Lubrication) applications, which is one of the most widely used original imported rotary joints from Deublin, the world-leading manufacturer of rotary fluid transfer solutions headquartered in the United States. Designed with patented Pop-Off dry-running technology, this single-channel rotary union solves the core pain point of traditional rotary joints that are prone to seal damage during equipment idling, tool change and frequent startup-stop cycles, allowing unlimited dry rotation under no medium pressure to effectively extend service life and reduce equipment downtime and maintenance costsDeublin Company.

The model 902-111-165 adopts a balanced silicon carbide mechanical seal structure matched with a labyrinth dustproof protection system and large exhaust vents, which can effectively isolate cutting chips, coolant impurities and oil mist pollutants to protect internal precision ball bearings from abrasion and corrosion. The anodized anti-corrosion aluminum alloy housing features excellent pressure resistance and thermal dissipation performance, supporting stable continuous operation under a maximum working pressure of 70 bar and a rated high speed of 12,000 RPM, perfectly matching high-precision machining centers, deep hole drilling machines, lathe spindles and automated production line processing equipment. Different from blocked narrow-channel rotary joints, the 902 series applies a straight-through full-flow internal channel design without any dead-angle structures, which avoids the accumulation of iron scraps and sediment, greatly reducing the risk of channel clogging and seal failure in long-term machining scenarios with complex coolant quality. Equipped with standard threaded rotor connection, the product features simple on-site installation, no complicated positioning adjustment, strong compatibility with mainstream spindle brands in the market, and has obtained ISO 9001 international quality certification, with stable and consistent performance in batch industrial applications.

2. Core Product Advantages

2.1 Patented Pop-Off™ Dry Running Technology

The most competitive feature of Deublin 902-111-165 is the self-developed Pop-Off sealing structure. When the coolant pump stops supplying pressure during tool change or equipment standby, the seal surface automatically separates to eliminate dry friction between dynamic and static sealing pairs, realizing unlimited safe dry running without medium pressure. Conventional rotary unions will suffer irreversible seal wear after dozens of dry rotation times, while this model can withstand tens of thousands of idle startup cycles, cutting the frequency of spare parts replacement by more than 60% for machine tool users. It is perfectly suitable for intermittent processing equipment such as automated production lines, transfer machining stations and multi-process CNC centers.

2.2 High Wear-Resistant Balanced Mechanical Sealing System

The dynamic and static sealing pairs are made of high-purity silicon carbide material with ultra-high hardness, which resists abrasion caused by tiny solid particles in water-based coolant and oil mist media, and has excellent acid and alkali corrosion resistance to adapt to various industrial coolant formulas. The balanced pressure sealing design evenly distributes internal fluid pressure on the sealing surface, avoiding local pressure overload leakage under high-pressure coolant impact, ensuring zero external leakage under the rated working pressure of 70 bar, which not only saves coolant consumption but also keeps the spindle and workshop environment clean to prevent equipment circuit short-circuit and safety accidents caused by fluid leakage.

2.3 Anti-Pollution Structural Design & Long Service Life

Built-in double deep-groove precision radial ball bearings provide stable rotational support for high-speed operation, effectively reducing rotational runout and friction noise. The external labyrinth dust-proof structure plus multi-directional large leakage vents can quickly discharge splashed cutting fluid, iron powder and oil mist entering the housing, preventing pollutants from adhering to the bearing and seal assembly to cause jamming and rust failure. The overall shell adopts hard anodizing surface treatment, with scratch resistance, oxidation resistance and long-term stable dimensional accuracy, which will not deform under long-term high-speed thermal cycling working conditionsDeublin Company.

2.4 Strong Application Compatibility & Low Maintenance Cost

This 902-111-165 rotary union supports two mainstream working media: water-based cutting coolant and MQL oil mist lubrication. The straight-through large-flow channel ensures stable fluid delivery efficiency without flow attenuation, which can quickly take away cutting heat to improve workpiece machining precision and tool service life. The standard M16×1.5 left-hand thread rotor interface and radial 3/8 inch PT inlet connection realize rapid replacement and compatibility with most domestic and imported spindle equipment; users only need to replace the internal seal kit for routine maintenance without disassembling the entire spindle structure, greatly shortening equipment maintenance downtime.

3. Detailed Technical Specification of 902-111-165

Specification Item	Technical Parameter
Model Number	902-111-165
Channel Quantity	Single Passage
Applicable Medium	Water-based Coolant, MQL Oil Mist
Maximum Working Pressure	70 Bar (1000 PSI)
Rated Maximum Rotating Speed	12000 RPM
Operating Temperature Range	-20ºC ~ +120ºC
Rotor Connection	M16×1.5 Left Hand Thread
Supply Inlet Connection	Radial 3/8" PT Thread
Housing Material	Hard Anodized Aluminum Alloy
Seal Material	Silicon Carbide Balanced Mechanical Seal
Bearing Type	Precision Deep Groove Radial Ball Bearing
Protection Structure	Labyrinth Dust-proof + Large Vent Protection
Certification	ISO 9001 Quality Management System
Transport Package	Original Deublin Anti-static Shockproof Carton
Origin	United States
Filter Requirement	ISO 4406 Cleanliness Grade 17/15, Max 60μm Particle

4. Wide Application Scenarios

Deublin 902-111-165 high-speed rotary union is widely matched in precision machining industries, including automotive parts processing, aerospace component manufacturing, mold precision machining, hydraulic valve deep hole drilling, 3C electronic hardware processing and other fields. It is installed on the spindle end of vertical machining centers, horizontal machining centers, CNC lathes, gun drilling machines and multi-station automated transfer machine tools, responsible for conveying cooling and lubricating medium to the high-speed rotating tool end, realizing high-efficiency cooling, chip removal and tool lubrication. For equipment with frequent tool changes and intermittent processing, its unique dry-running advantage can maximize the stability of the production line, reduce unexpected shutdown failures caused by rotary joint damage, and help manufacturers improve overall production efficiency and comprehensive equipment management costs.

5. Related Derivative Models of Deublin 902 Series

We supply a full range of standard spare models under Deublin 902 Series, covering different inlet directions, thread specifications and rated speed versions to meet diverse spindle transformation and equipment replacement demands. The main derivative hot-selling models are sorted in the table below:

Part Number	Inlet Direction	Rotor Thread	Max Speed	Core Application Feature
902-111-165	Radial Side Inlet	M16×1.5 LH	12000 RPM	Standard universal CNC spindle model
902-120-188	Radial Side Inlet	M16×1.5 LH	15000 RPM	High-speed precision mold machining
902-121-188	Axial Rear Inlet	M16×1.5 LH	15000 RPM	Narrow installation space spindle
902-141-188	Radial Side Inlet	M16×1.5 LH	12000 RPM	High-flow large chip processing equipment
902-141-192	Axial Rear Inlet	M16×1.5 LH	18000 RPM	Ultra-high-speed small spindle
902-179-188	Radial Side Inlet	M16×1.5 LH	12000 RPM	Stone cutting & heavy-duty machining

In addition to the 902 series, we also support the supply of Deublin's mainstream Pop-Off rotary joint product lines including 1109 Series, 1005 Series, 55 Series and 2400 Series, which cover low-speed hydraulic transmission, high-speed gas delivery, multi-channel fluid rotary transfer and other working conditions. We provide original genuine spot supply, original seal maintenance kits, technical parameter consulting and model replacement selection services, supporting bulk order price negotiation and customized interface non-standard transformation solutions for special equipment requirementsDeublin Company.

6. Product Maintenance & Selection Notes

To maximize the service life of Deublin 902-111-165 rotary union, the cooling medium must be filtered strictly according to ISO 4406 standard to avoid large particle impurities entering the internal channel and scratching the silicon carbide sealing surface. Regularly check the leakage of the inlet thread and the spindle installation end; slight external leakage mostly means the seal assembly has worn out, and the original supporting seal kit should be replaced in time. Do not exceed the rated pressure and speed for overload operation for a long time, otherwise it will cause premature bearing heating failure and seal burst leakage. When selecting alternative derivative models, confirm three core parameters: inlet installation direction, rotor thread specification and maximum spindle operating speed, to avoid installation mismatch or performance exceeding the safe range. All our supplied Deublin original rotary unions come with factory quality inspection certificates and traceable part batch numbers to guarantee genuine product quality and after-sales technical support.