Rotating Unions for Machine Tools
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ENGINEERING CATALOG For Machine Tools, Machining Centers and Transfer Lines w w w . d e u b l i n . c o m

4 STEPS TO FINDING THE CORRECT UNION SERIES FOR YOUR MACHINE TOOL APPLICATION 1 2 3 4 Does the machine have a single supply connection (for example, coolant) or multiple connections (such as a combination of coolant, air, and hydraulic oil)? What fluid or fluids must be transferred by the rotating union? What is the maximum pressure required? What is the maximum spindle speed required? Coolant or MQL - dry run possible (rotation with no coolant is possible) Coolant or MQL or Compressed Air - dry run possible (operation without coolant possible) Contact DEUBLIN Contact DEUBLIN Contact...

HOW TO GET THE MOST  VALUE FROM THIS CATALOG If you are less familiar with machine tool applications of rotating unions, or if you would like a quick review, please read the “Information” sections first. These sections contain important details about designing, installing, and using rotating unions in machine tools. If you understand the principles of designing machines to use rotating unions completely, please use either the Selection Chart on the inside cover or Table of Contents to find the appropriate product page. These pages contain dimensions, performance data, and other necessary...

INFORMATION FOR DESIGNERS OF MACHINE TOOLS OPERATING PRINCIPLES OF ROTATING UNIONS Advantage of Through-Spindle Coolant (TSC) Parts of a Rotating Union Nearly all modern machine tools and machining centers are equipped with so-called “flood coolant”. High-speed cutting tools require both cooling and lubrication to reduce the rate of tool wear and to prevent overheating, which degrade the tool’s strength. Flood coolant systems spray coolant fluid onto the work piece near the cutting tool. But for many machining operations, such as milling or hole drilling, these systems are less effective at...

INFORMATION FOR DESIGNERS OF MACHINE TOOLS SELECTING THE RIGHT UNION FOR YOUR APPLICATION Bearing-supported Rotor-mounted Example: DEUBLIN 1109 series Bearing-supported Bore-mounted Example: DEUBLIN 1109 series Example: DEUBLIN 1139 series Bearing or Bearingless? Rotating unions for machine tool applications are available in bearing-supported and bearingless configurations. Each kind has advantages and disadvantages for the machine tool designer. Bearing-supported unions are easy to install and replace, because of their one-piece design. Deublin makes two different mounting styles. The...

INFORMATION FOR DESIGNERS OF MACHINE TOOLS SELECTING THE RIGHT UNION FOR YOUR APPLICATION Which DEUBLIN® Seal Technology? Deublin offers five different seal technologies, in order to provide the best solution for every machining application. Only Deublin can offer such flexibility to the machine tool designer. coolant (TSC). Because the seals separate during tool changes when coolant pressure is off, residual coolant in the supply hose and spindle can drain through the seal faces. Therefore, a Pop-Off ® union generally requires a downward-pointing drain line to direct such residual coolant...

INFORMATION FOR DESIGNERS OF MACHINE TOOLS MOUNTING TOLERANCES require the spindle end to be machined according to the following dimensions and tolerances: The interface between spindle and union must be manufactured to precise tolerance to ensure accurate, vibration-free operation. Bearingless unions and rotor-mounted, bearing-supported unions Table shows reference data: Please refer to the dimensions on the individual drawing when dimensioning the spindle. Rotor Connection Rotor Pilot A F H All dimensions in millimeters unless otherwise indicated. Installed Rotor Datum A is the axis of...

INFORMATION FOR DESIGNERS OF MACHINE TOOLS DRAIN AND SUPPLY HOSE CONNECTIONS Drain Connection All unions, even closed-seal designs, can experience migration of minimal amounts of media across the seal faces. Such media migration keeps the seals well lubricated and avoids the permanent seal damage that comes from dry running. In addition, even the best unions eventually will need replacement. Therefore, the machine tool designer should provide adequate drainage to prevent costly spindle damage. Deublin designs are very advanced, but even Deublin must obey the law of gravity! Therefore, it is...

INFORMATION FOR USERS OF MACHINE TOOLS INSTALLATION TECHNIQUES Installing a Deublin rotating union is as easy as 1-2-3. For maximum life and reliability, maintenance engineers and service technicians need only to follow a few simple rules. 1. For bearing-supported, rotor-mounted unions, connect both supply and drain hoses to the union before mounting the union on the spindle. Otherwise, bearings in the union may become brinnelled or galled when the hose connections are tightened. 2. Clean the mounting surfaces of the spindle thoroughly before mounting the union. The spindle pilot must be...

INFORMATION FOR USERS OF MACHINE TOOLS COOLANT FILTRATION AND MAINTENANCE Deublin unions are designed to handle the various coolant contaminants found in most manufacturing facilities. To ensure long union life and maximum productivity, however, coolant filtration should conform to ISO 4406:1999 Code 17/15/12, SAE 749 Class 5, or NAS 1638 Class 8, with a maximum particle size of 60 microns. For comparison, pumps (both fixed piston and variable volume) such as those used in coolant systems typically require ISO 4406 Code 16/14/11 or better – in other words, half as much contamination as...

1005 Series “Closed Seal” Rotating Unions for Continuous Coolant Service • Single passage for coolant or MQL • Closed seals for transfer line and similar applications • Full-flow design has no obstructions to trap chips or debris • Bearing-supported with threaded rotor for easy installation • Labyrinth system and vents to protect ball bearings • alanced mechanical seals made from silicon carbide for long life even under B difficult operating conditions • Anodized housing and stainless steel rotor resist corrosion Operating Data Maximum Speed Maximum Pressure Maximum Flow Maximum Temperature...