MHS3 / MHS4 Series Concentric Pneumatic Gripper (Wedge Cam Hollow Centering Chuck)

Brand: SOLH by Richge Technology 

Series Overview

     -- MHS3: 3-jaw concentric parallel gripper driven by wedge cam. Designed for clamping shafts, discs and circular workpieces with ultra-high coaxiality.

     -- MHS4: 4-jaw orthogonal parallel gripper for square, rectangular and irregular components, stable clamping to prevent deflection and tilting.

     -- Drive Mode: Double acting (D) as standard; single acting normally closed / normally open optional.

     -- Structure: Wedge cam transmission, built-in magnetic ring, central hollow through bore, high rigidity wear-resistant construction, oil-free operation.

     -- Position Accuracy: Repeat positioning accuracy ±0.01mm, consistent central positioning without offset.

Core Structural Advantages

  1. Wedge cam high-precision self-centering

     -- All jaws synchronously open and close sharing identical center point; circular parts realize automatic centering without eccentricity.

  2. Central hollow through hole

     -- Allows routing of air tubing, fiber optics or ejector pins; suitable for sleeve workpieces, shaft parts and through-type blanking processes.

  3. Compact low-profile lightweight body

     -- Small overall height, ideal for dense installation layout on robot end effector.

  4. Strong resistance to lateral force

     -- Perfect for press-fitting, plugging operations and machine tool loading with external load force.

  5. Built-in magnetic ring for all bore sizes

     -- Compatible with M9B / M9BW series magnetic switches to detect fully open / fully closed status.

  6. Complete bore range: φ16 / 20 / 25 / 32 / 40 / 50 / 63 / 80 / 100 / 125mm

Complete Model Naming Rule

  1. Model Example: MHS3-32D-M9BW

  2. Standard Order Reference Examples

     -- MHS3-25D: 3-jaw, φ25, double acting, without magnetic switch

     -- MHS4-40D-2M9B: 4-jaw, φ40, double acting, equipped with dual M9B magnetic switches

General Standard Technical Specifications (Test Pressure: 0.5MPa)

  1. Common Parameters

     -- Operating Pressure Range: 0.15 ~ 0.6 MPa

     -- Ambient Temperature: -10 ~ 60℃ (no icing inside air piping)

     -- Max Operating Frequency: 120 cycles per minute

     -- Repeat Positioning Accuracy: ±0.01 mm

     -- Lubrication: Oil-free design, suitable for clean production environments

  2. Clamping Force & Single Side Stroke Table

Selection Comparison: MHS3 VS MHS4

Mounting Methods & Typical Application Scenarios

  1. Mounting Options

     -- Fixed via end face screws + side positioning pins, universal for robot EOAT installation

     -- Central through bore enables ejector pin ejection; support both internal expanding & external clamping

  2. Typical Industrial Applications

     -- Machine tool loading & unloading: Gripping shaft and disc workpieces

     -- 3C Electronics: Circular terminals, square chips, miniature hardware handling

     -- Packaging Industry: Bottle bodies, tubular and cylindrical material positioning

     -- Assembly & Press-fit Processes: Bearing pressing, shaft sleeve insertion, concentric assembly

Full MHS Family Product Classification

     -- MHS2: 2 parallel jaws — for flat plates & planar workpieces

     -- MHS3: 3 concentric jaws — preferred solution for all circular components

     -- MHS4: 4 orthogonal jaws — preferred solution for square & rectangular parts

     -- MHSJ3: Equipped with dust cover — for dusty harsh workshop environments

     -- MHSH3: Extended hollow through bore — dedicated for continuous through-type processing

One Sentence Summary

     SOLH MHS3 3-jaw and MHS4 4-jaw wedge cam self-centering hollow pneumatic grippers deliver ±0.01mm high-precision concentric positioning with optional single/double acting configuration and central through hole, compatible with M9 series magnetic switches; MHS3 for circular shaft/disc parts, MHS4 for square & rectangular components, widely used in machine tool loading, 3C automation and precision press-fit assembly stations.