Overview & Technology:
The SHOWA GIKEN KC, KCL, and SKCL Series Rotary Joints (Rotary Unions), engineered by SHOWA GIKEN INDUSTRIAL CO., LTD. (Japan), deliver compact, high-precision fluid conveyance solutions for automated machinery and machine tool spindles. Utilizing proprietary mechanical seal technology constructed from wear-resistant Silicon Carbide, refined Carbon, and Ceramic faces, these units ensure complete fluid isolation and eliminate media leakage during continuous high-speed rotation.

Key Features & Highlights:
• Tailored Specialized Structural Designs:
  - KC Series: Duplex flow structure with an integrated internal siphon tube (such as 25A-10A, 40A-20A, 50A-25A), providing simultaneous fluid delivery and return drainage within a single space-saving envelope.
  - KCL Series: Ultra-compact miniature design (6A, 8A sizes) engineered for constrained installation footprints and exceptionally low rotational torque.
  - SKCL Series: Premium corrosion-resistant stainless steel construction (SKCL 10A), ideal for demanding coolant and chemical fluid applications.
• Self-Tightening Thread Orientations:
  - Right-Hand Thread (RH): Self-tightens with clockwise journal rotation.
  - Left-Hand Thread (LH): Self-tightens with counter-clockwise journal rotation.
• High-Precision Ball Bearings: Ensures smooth rotation, minimizes run-out, dampens vibration, and lowers driving motor power requirements.

Durability & Heavy-Duty Construction:
The casing is precision-machined from robust copper alloys or JIS-standard stainless steel. The units deliver reliable resistance to continuous thermal fluctuations and operating pressure spikes, ensuring extended service life without demanding maintenance.

Practical Value for QA/QC:
Deploying SHOWA GIKEN KC/KCL/SKCL rotary joints stabilizes cooling pressure and temperature distribution across rotating assemblies, prevents seal blowouts, extends CNC tooling life, and maintains consistent machining surface accuracy.

• Manufacturer: SHOWA GIKEN INDUSTRIAL CO., LTD. (SGK)
• Product Category: High-Precision Industrial Rotary Joint / Rotary Union
• Series: KC Series, KCL Series, SKCL Series
• Country of Origin: Japan
• Applicable Media: Coolant / Water, Hydraulic / Lubricating Oil, Compressed Air, Vacuum
• Maximum Operating Temperature: Up to 100°C - 120°C (depending on seal selection)
• Maximum Operating Pressure: Up to 1.0 - 1.5 MPa (~10 - 15 bar)
• Maximum Rotation Speed: Up to 1500 - 3500 RPM (depending on port size)
• Connection Standards: JIS / RC Standard Thread (or optional NPT)

DETAILED MODEL DESIGNATIONS:
• KC 25A-10A LH: Duplex dual passage rotary joint, casing 25A (1"), internal pipe 10A (3/8"), Left-Hand Thread (LH).
• KC 25A-10A RH: Duplex dual passage rotary joint, casing 25A (1"), internal pipe 10A (3/8"), Right-Hand Thread (RH).
• KC 40A-20A RH: Duplex dual passage rotary joint, casing 40A (1-1/2"), internal pipe 20A (3/4"), Right-Hand Thread (RH).
• KC 50A-25A RH: Duplex dual passage rotary joint, casing 50A (2"), internal pipe 25A (1"), Right-Hand Thread (RH).
• KCL 6A RH: Miniature KCL series rotary joint, port size 6A (1/8"), Right-Hand Thread (RH).
• KCL 8A RH: Miniature KCL series rotary joint, port size 8A (1/4"), Right-Hand Thread (RH).
• SKCL 10A RH: Stainless steel SKCL series rotary joint, port size 10A (3/8"), Right-Hand Thread (RH).

DESIGNATION SYSTEM NOTES:
• KC [Casing]-[Internal]: Duplex dual-passage coaxial supply and return design.
• KCL: Compact low-torque miniature rotary joint series.
• SKCL: Stainless steel corrosion-resistant rotary joint series.
• RH (Right Hand): Clockwise rotation tightening direction.
• LH (Left Hand): Counter-clockwise rotation tightening direction.