SI Series Tie-Rod Free Profile Standard Cylinder | ISO 15552 Pneumatic Cylinder

Brand: SOLH by Richge Technology

1. Product Overview & Core Structural Features

     The SOLH SI series is a high-precision double-acting standard cylinder fully compliant with ISO 15552 (former ISO 6431 / VDMA 24562) international standards, benchmarked against Festo DNC series. Adopting a tie-rod-free star-shaped aluminum profile cylinder tube, it features no exposed tie rods, built-in magnetic switch grooves, dual-side adjustable air buffer and full ISO accessory compatibility. With superior rigidity, anti-torsion performance, long service life and clean appearance, it serves as the mainstream mid-range ISO standard cylinder to replace traditional tie-rod SC cylinders, perfectly suitable for export-grade equipment and standardized automated machinery.

  1.1 Standard Compatibility

     Fully conforms to ISO 15552 and VDMA 24562 industrial standards. All mounting dimensions, interfaces and accessories are completely interchangeable with global mainstream ISO cylinders such as DNC, SE and DSBA, supporting zero-modification replacement and standardized batch assembly.

  1.2 Optimized Profile Structure

     Adopts integrated star-shaped square aluminum alloy profile cylinder tube without exposed tie rods. The overall structure delivers high rigidity, excellent anti-torsion capability, neat and corrosion-resistant appearance. Reserved standard magnetic switch grooves on both sides allow direct installation of CMSE, DMSE and CS1 series sensors without extra brackets.

  1.3 Diversified Motion & Functional Derivatives

     • SI Standard: Single-rod double-acting reciprocating motion, universal standard model for most automated scenarios

     • SID Double Rod: Dual-end rod output, realizing synchronous operation and enhanced anti-torsion stability

     • SIJ Adjustable Stroke: Double-rod structure with adjustable limit nuts for precise stroke fine-tuning

     • SIL Lockable Type: Equipped with end or arbitrary position locking device for safety pressure holding and position fixing

     • SIF Valve Integrated Type: Integrated 4M series solenoid valve, valve-cylinder integrated design to save installation space

     • SIQ Anti-Torsion Type: Square piston rod structure for ultra-high anti-torsion positioning accuracy

  1.4 High-Performance Buffer System

     Standard equipped with dual-side adjustable air buffer + PPV elastic cushion. The buffer stroke increases proportionally with cylinder bore, effectively reducing impact and noise during high-speed and heavy-load operation, ensuring stable and low-vibration cyclic movement.

  1.5 Durable Sealing & Material Configuration

     Adopts dual Y-shaped one-way compensation sealing structure, featuring ultra-low starting pressure (0.1MPa), stable oil-free operation and extended service life. The piston rod is made of 45# steel with hard chrome plating, delivering excellent wear resistance, rust resistance and structural stability.

  1.6 Magnetic Induction Configuration

     Supports built-in magnetic ring (-S configuration) as standard, compatible with AirTAC CMSE, DMSE, CS1-B/F/U series magnetic switches, achieving real-time piston position detection and automated signal linkage.

2. Complete Model Naming Rules & Order Examples

  1. Typical Model Code: SI 50×150-S-FA

  2. Derivative Series Code Explanation

     • SID: Double-rod double-acting, dual-end rod output for synchronous operation and anti-torsion performance

     • SIJ: Adjustable stroke double-rod type with fine-tuning nuts for flexible stroke calibration

     • SIL: Lockable type with end position or arbitrary position locking for safety positioning

     • SIF: Solenoid valve integrated type, valve-cylinder integrated structure for space saving

  3.Standard Order Example

     SI 63×200-S: 63mm bore, 200mm stroke, with magnetic ring, standard adjustable air buffer

3. Core Technical Parameters (Standard Type)

4. 0.6MPa Theoretical Thrust & Tension Chart (Single Rod, Safety Factor ≥2)

5. Mounting Accessories & Derivative Models

  5.1 Standard ISO Universal Mounting Types (Fully Interchangeable with DNC/SE)

     • FA/FB: Front flange / Rear flange mounting for flat fixed installation

     • CA/CB: Single clevis / Double clevis mounting for hinged swing operation

     • LB: Foot bracket mounting for lateral fixed installation

     • TC/TCM: Trunnion / Magnetic trunnion mounting for middle swing positioning

     • L: Side mounting for compact space layout

     Universal Accessories: I/Y/U/F joints, floating joints, rod end bearings, fully compatible with all ISO 15552 standard cylinders.

  5.2 Core Derivative Series Advantages

     • SID Double Rod: Dual-end synchronous output, enhanced structural stability and anti-deflection capability

     • SIJ Adjustable Stroke: Flexible stroke fine-tuning to adapt to variable working stroke requirements

     • SIL Lockable Type: Reliable locking and pressure holding to prevent position deviation under power-off or load change

     • SIF Valve Integrated Type: Integrated solenoid valve design, simplified air circuit, reduced installation space and assembly cost

     • SIQ Anti-Torsion Type: Special square piston rod structure for high-precision anti-torsion positioning

6. Application Scenarios & Selection Comparison (SI vs SC vs DNC)

  6.1 Priority Application Scenarios for SI Series

     • Export equipment and European standard automated machinery requiring ISO 15552 interface interchangeability

     • Automation production lines requiring tie-rod-free clean appearance and side-by-side compact installation

     • Working conditions requiring higher rigidity, anti-torsion performance and longer service life than SC cylinders, with better cost performance than DNC cylinders

     • Universal linear pushing, pressing, positioning, handling, assembling, packaging and machine tool automation scenarios

  6.2 Core Model Comparison

7. 3-Step Quick Selection Guide

     1. Bore Size Selection: Select bore diameter according to actual horizontal/vertical load and thrust demand, reserve no less than 50% safety margin; upgrade 1~2 bore sizes for eccentric load and cantilever working conditions.

     2. Stroke Selection: Add 20~50mm safety margin on the basis of actual working stroke; maximum configurable stroke up to 2000mm.

     3. Functional Configuration: Standard configuration with -S magnetic ring + PPV adjustable air buffer; select SID for double rod, SIJ for adjustable stroke, SIL for locking function, and FA/FB/CA/CB/LB/TC for corresponding mounting methods.

One Sentence Summary

     The SOLH SI series tie-rod-free ISO 15552 standard cylinder features profile integrated structure, high rigidity, adjustable air buffer and full universal interchangeability, being the cost-effective mid-range replacement for traditional SC and imported DNC cylinders, widely applicable for standardized and export-grade automated equipment.