Product Description
Cylindrical pin
●Product Introduction
This product is a Cylindrical Dowel Pin manufactured from SUJ2 High-Carbon Chromium Bearing Steel. SUJ2 is a premium bearing steel conforming to the Japanese JIS G4805 standard, renowned for its excellent wear resistance, high contact fatigue strength, and good dimensional stability. The cylindrical dowel pin features a simple yet extremely precise design. It achieves zero-clearance precise positioning and rigid connection between components via interference or transition fits with reamed holes. The use of SUJ2 material makes this product particularly suitable for demanding applications involving high alternating stress, where high reliability and long service life are critical.
●Structural Features
1.Ultra-High Precision Positioning: The cylindrical geometry combined with a precision-ground outer diameter enables micron-level positioning accuracy, ensuring alignment and repeatable assembly consistency of critical components.
2.Exceptional Shear and Fatigue Resistance: The SUJ2 material, after heat treatment, exhibits extremely high hardness and fatigue strength, enabling it to reliably withstand repeated radial shear forces and impact loads, preventing failure due to plastic deformation or fatigue spalling.
3.Superior Wear Resistance: The high-hardness surface and unique microstructure of bearing steel result in very low wear rates during interaction with the hole wall, maintaining fit precision over the long term and extending equipment maintenance intervals.
4.Rigid Support and Anti-Rotation: Provides a solid, rigid connection, effectively preventing relative sliding or rotation between mated parts, ensuring absolute stability in transmission systems and structural joints.
5.Reliable Dimensional Stability: SUJ2 material exhibits minimal distortion during heat treatment, and the product offers excellent dimensional stability, preserving its preset accuracy even under temperature variations or during long-term storage.
●Typical Applications
SUJ2 Cylindrical Dowel Pins, leveraging their high hardness, high precision, and high reliability, are primarily used in fields with extremely stringent performance requirements:
◆Precision Bearings and Transmission Systems:
Bearing Location: Used to axially locate rolling bearings (e.g., deep groove ball bearings, tapered roller bearings) on shafts or within housings, serving as a critical locating element in bearing arrangements.
Gearboxes and Transmissions: Provide absolute reliable circumferential and axial fixation for critical rotating components like high-torque gears, synchronizers, and shafts, withstanding alternating shear forces.
◆High-End Mold Manufacturing:
Precision Stamping/Injection Molds: Locate mold cores, inserts, guide bushings, etc., ensuring long-term closing accuracy and stability of molds under high-speed, high-pressure operation.
◆Precision Machine Tools and Industrial Machinery:
Machine Tool Spindles: Used for locating and preloading bearings within spindle units.
Core Components of Automated Equipment: Used for precise location and locking of critical parts in rotary or linear motion units of industrial robot joints, high-precision linear modules, indexing tables, etc.
◆Critical Automotive Components:
Engine: Locating balance weights or timing gears on crankshafts and camshafts.
Drive Axles and Propeller Shafts: Locating and securing differential gears, universal joint yokes, etc.
◆Aerospace and Measuring Instruments:
Applied in structural connections and moving part locations where extreme requirements for weight, reliability, and precision exist, such as flight control mechanisms and adjustment mechanisms of high-precision optical instruments.
