MSZ Series Three-Position Rotary Cylinder | Rack & Pinion Pneumatic Actuator

Brand: SOLH by Richge Technology

1. Product Overview & Core Positioning

  The SOLH MSZ series is a professional rack-and-pinion rotary table cylinder specially designed for three-position positioning. It features unique left/mid/right (0° / Mid-stop / 180°) triple stop function, solving the positioning pain point that standard two-position rotary cylinders cannot achieve mid-stroke stopping. Controlled by a single 5/3-way middle-pressure solenoid valve without dual-valve circuit configuration, it greatly simplifies pneumatic system layout. The middle position supports ±10° fine adjustment, while both ends realize 0~95° angle tuning, making it the optimal pneumatic solution for workpiece diversion, sorting, multi-station indexing and scenarios requiring mandatory intermediate positioning.

  1.1 Series Quick Selection Core

Core Product Positioning: Realizes accurate three-stop rotation of 0° (Left) → Mid (Center) → 180° (Right) with adjustable intermediate position to meet multi-angle flexible positioning demands.

2. Core Technical Parameters (SOLH Standard)

  2.1 Basic Specifications

     • Bore Size: 10 / 20 / 30 / 50

     • Operation Mode: Double-acting, dual-rack & pinion, three-position mid-stop

     • Working Pressure: 0.2~1.0MPa (Rubber buffer type); 0.2~0.6MPa (Hydraulic buffer type)

     • Proof Pressure: 1.05MPa

     • Working Temperature: 0℃~60℃ (No freezing environment)

     • Swing Angle: 0~95° for single end, total adjustable angle 0~190°

     • Mid-stop Adjustment: ±10° fine tuning based on the central position

     • Positioning Accuracy: ±0.02mm (MSZA High-precision type); ±0.05mm (MSZB Basic type)

     • Lubrication Mode: Oil-free self-lubrication operation

     • Port Thread: M5×0.8 (10/20 bore); M8×1.25 (30/50 bore)

  2.2 Output Torque & Allowable Load (0.5MPa)

  2.3 Buffer Energy Absorption Capacity

3. Structural Features & Three-Position Working Principle

  3.1 Core Structural Advantages

     • Dual-Rack & Dual-Piston Mid-stop Structure: Adopts double rack driving gear and independent middle stop piston design, eliminating backlash and outputting stable and consistent torque during three-position switching.

     • Integrated Rotary Table Design: Equipped with positioning pin holes for direct workpiece mounting, featuring high rigidity and simple and fast installation without extra fixtures.

     • Central Hollow Through-hole: Built-in central through hole (Ø6~Ø12), allowing air pipes and electric wires to pass through neatly, realizing integrated wiring and piping.

     • Independent Angle Adjustment: Equipped with professional adjustment bolts, supporting independent fine tuning of left/right limit angles and middle stop position, realizing flexible angle calibration.

     • Standard Magnetic Switch Slots: Standard reserved grooves on both sides, compatible with D-M9B and D-A93 magnetic switches, realizing real-time detection of left/mid/right three positions for automated signal linkage.

  3.2 Three-Position Control Principle (Core Advantage)

   The MSZ series requires only one 5/3-way middle-pressure solenoid valve to realize three-position switching, no dual-valve or complex air circuit switching required, which simplifies system structure and reduces overall equipment cost.

     1. Left Position (0°): Solenoid valve left station air intake, single-side air supply and reverse-side exhaust, driving the rotary table to accurately lock at the 0° left limit position.

     2. Right Position (180°): Solenoid valve right station air intake, reverse air circuit action, driving the rotary table to rotate and lock at the 180° right limit position.

     3. Middle Stop Position (M): Solenoid valve middle station, both sides of the cylinder are pressurized simultaneously. The rotary piston maintains force balance, and the independent mid-stop piston pushes and locks the table at the preset middle position, realizing stable intermediate positioning.

4. Complete Model Naming Rules

  Typical Model Code: MSZB20-R-M9BL

5. Selection Rules & Typical Applications

  5.1 Selection Priority Rules

     1. Position Demand First: Choose MSZ series for working conditions requiring three-position (left/mid/right) stop; MSQ/HRQ two-position rotary cylinders are not applicable.

     2. Precision Matching: Select MSZA high-precision type for high-repeat positioning scenarios; choose cost-effective MSZB basic type for general universal scenarios.

     3. Speed & Load Matching: Adopt -R hydraulic buffer type for high-speed, heavy-load and high-impact operation; standard rubber buffer is sufficient for low-speed light-load operation.

     4. Load Verification: Strictly ensure actual radial load, axial load and bending moment are lower than the allowable values to avoid jamming and positioning deviation.

  5.2 Typical Application Scenarios

     • Workpiece Diversion & Sorting: Realize middle positioning and left/right material distribution with 0°/90°/180° multi-angle switching.

     • Multi-station Indexing: Three-position switching for automated assembly, detection and process transfer stations.

     • Workpiece Flip & Steering: Complete stable flipping and steering actions through 0° → middle → 180° progressive rotation.

     • Electronic & Packaging Automation: Applied to bottle cap tightening, chip positioning, multi-angle product detection and precision packaging equipment.

6. MSZ vs MSQ Core Difference Comparison

One Sentence Summary

     The SOLH MSZ series three-position rack-and-pinion rotary cylinder achieves exclusive left/mid/right triple stop positioning with single-valve simple control, adjustable middle angle and high repeat accuracy, being the professional customized solution for automated sorting, indexing and multi-angle positioning equipment.