KS / KX Series Swivel Rotary Push-in Fittings

SOLH KS / KX Series Swivel Rotary Push-in Fittings

Brand: SOLH by Richge Technology | 360° Rotating Pneumatic Rotary Union

1. Product Overview

  KS / KX series are rotary swivel push-in fittings designed for 360° continuous rotation and oscillating applications such as robotic manipulators, rotary tables and oscillating cylinder ends. They prevent air tubing from tangling, twisting or being pulled apart during motion.

     • KS = Standard swivel type (single ball bearing)

     • KX = High-speed swivel type (dual ball bearings)

2. Core Difference: KS vs KX

     • KS Standard Type: Single ball bearing, low torque. Max speed: 500 rpm (φ4/φ6), 400 rpm (φ8), 300 rpm (φ10), 250 rpm (φ12). Suitable for medium-low speed oscillation & intermittent rotation.

     • KX High-Speed Type: Dual ball bearings, ultra-low torque, smoother rotation. Max speed: 1500 rpm (φ4/φ6), 1200 rpm (φ8), 1000 rpm (φ10/φ12). Suitable for continuous high-speed rotation and frequent oscillation.

3. Core Features

     • ✅ 360° Free Rotation: Built-in bearing assembly eliminates tubing knotting and twisting at rotating ends.

     • ✅ Low Rotational Torque: Only 0.006～0.022 N·m at 0.5 MPa, minimal extra load on motion axes.

     • ✅ Anti-rotation Internal Structure: Prevents tubing from spinning together with the fitting and extends tube service life.

     • ✅ Copper-Free Construction: Electroless nickel plating, usable in copper-restricted environments (semiconductor, food processing, medical).

     • ✅ Push-to-Connect: Compatible with φ4/φ6/φ8/φ10/φ12 PU, nylon & soft nylon tubes. Auto-lock on insertion, press collar for quick release.

     • ✅ Vacuum Compatible: −100 kPa ~ 1.0 MPa (Not recommended for critical vacuum holding due to minor inherent leakage).

     • ✅ Thread Pre-Coated Sealant (S suffix): Standard option; no PTFE tape required during installation.

4. Model Naming & Examples

  KS Standard Series

     • KSH06-02S: Straight (H), φ6 tube, R1/4 thread, pre-applied sealant (S)

     • KSL08-01S: Elbow (L), φ8 tube, R1/8 thread, pre-applied sealant (S)

  KX High-Speed Series

     • KXH04-M5: Straight (H), φ4 tube, M5×0.8 metric thread

     • KXL10-03S: Elbow (L), φ10 tube, R3/8 thread, pre-applied sealant (S)

  Naming Rule

5. Technical Specifications

Common Parameters

Rotational Torque @ 0.5 MPa (N·m)

Maximum Rotating Speed (rpm)

6. Application Scenarios

     1. Robot wrist / joint: Prevent tubing tangling on rotating robot end effectors.

     2. Rotary index tables: Continuous 360° air supply for high-speed turntables.

     3. Oscillating cylinder ends: Rocker & flip mechanisms to release twisting stress on air lines.

     4. General automation: Pneumatic units with frequent oscillation and intermittent rotation.

7. KS / KX vs Ordinary KQ Push-in Fittings

8. Selection Guide

     • Low-speed oscillation (≤500 rpm) → KS, better cost-performance

     • Continuous high-speed rotation (>500 rpm) → KX, dual bearing for longer service life

     • Copper-free & vacuum-sensitive environments → Prefer KS / KX