JA / JB / JC / JS Series Floating Joint

SOLH JA / JB / JC / JS Series Floating Joint | SMC Equivalent Pneumatic Rod End Connector

Brand: SOLH by Richge Technology | SMC Standard Floating Joint, Direct Replacement

1. Product Overview

  The floating joint acts as a flexible articulation between cylinder piston rod and load. Its core function is to absorb mounting misalignment and parallelism error. It protects the piston rod from side thrust, reducing bending, abnormal wear and jamming risk. It is a standard essential accessory for automation machinery.

2. Four Series Classification & Differences

3. General Technical Specifications

   Swing Angle: ±5° for JA/JB/JS; selected JC models up to ±10°

   Allowable Offset: 0.5~1 mm (JA); 0.5 mm (JB / JC / JS)

     • Operating Temperature: -5~+70℃ (standard); -10~+120℃ (stainless steel JS)

     • Thread Sizes: M3 / M4 / M5 / M6 / M8 / M10 / M14 / M18 / M22, matched to cylinder bore

     • Working Pressure: ≤1 MPa for pneumatic; ≤3.5 MPa for heavy-duty hydraulic versions

4. Model Code Explanation & Examples

  Take JA20-8-100 / JB16-6-080 as reference:
  Prefix JAJB/JC/JS = series type
  1st number (20/16): matched cylinder bore Φ20 / Φ16
  2nd number (86): piston rod thread M8×1.25 / M6×1.0
  Suffix (100080): mounting dimension / rod code, corresponds to standard overall length

5. 3-Step Selection Guide

  1. Select series by cylinder type
     Standard cylinder (SC  SI / CP96) → JA, general priority
     Thin cylinder (CQ2  CDQ2) → JB, compact space
     Micro cylinder  ultra-tight layout → JC ultra-short
     Food  medical / wet / corrosive environment → JS stainless steel

  2. Match thread and bore size
     Confirm piston rod thread (M5  M8 / M10 etc.) and cylinder bore. Note: same bore from different brands may have different thread specifications, always verify against actual cylinder drawing.

  3. Match load and working condition
     Standard pneumatic: standard series OK
     Heavy load  hydraulic: choose dedicated heavy-duty floating joint (not normal JA)
     High frequency reciprocation: prefer dust cover version for longer service life

6. Installation & Operation Notes

     • Remove dust cap before threading onto piston rod, reinstall after assembly to avoid crushing the cap.

     • Apply small amount of anaerobic thread locker on threads. PTFE tape is forbidden; debris may jam the ball joint.

     • Follow specified tightening torque. Over-tightening locks the ball joint and disables floating function.

     • Manually swing after installation to confirm free movement without sticking.

7. SOLH Replacement Statement

     SOLH JA/JB/JC/JS floating joints fully follow SMC model coding, dimension and performance specification. Direct drop-in replacement for imported parts, with competitive pricing and shorter lead time, ideal for mass equipment cost reduction.