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Titanium Alloy Locating Pins

Titanium Alloy Locating Pins
Material:Titanium Grade 2,Grade 5
Threadings:M3,M4,M5,M6
Our feature:Custom size and specs.
MOQ:5 pcs

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Description

Products Introduction of Titanium Alloy Locating Pins

Titanium Alloy Locating Pins are precision positioning fasteners manufactured from titanium and titanium alloys (primarily GR1/GR2 pure titanium and GR5 titanium alloy) through machining processes such as CNC turning, milling, knurling, grinding, heat treatment, and surface passivation/polishing; Their core functions include precise positioning, coaxial alignment, error-proofing in tooling, component assembly alignment, and removable locking and fastening; they are classified as custom precision mechanical fasteners. The hand-tighten, knurled, adjustable titanium alloy positioning pin is a custom, non-standard variant within the positioning pin category.

Classification and Properties of Common Materials

1. GR1/GR2 Industrial-Grade Pure Titanium Locating Pins

Composition: Pure titanium, titanium content ≥99.5%

Advantages: Extremely high resistance to corrosion by acids, alkalis, seawater, and chloride ions; good ductility and machinability; non-magnetic; excellent biocompatibility; weighs only 60% as much as stainless steel;

Disadvantages: Lower strength than TC4; not suitable for high-strength, load-bearing applications;

Applications: Seawater equipment, corrosive chemical environments, medical devices, implant-grade positioning components, and semiconductor cleanroom equipment.

2. GR5 (Ti-6Al-4V) Titanium Alloy Locating Pins (Most Versatile)

Composition: Titanium + 6% aluminum + 4% vanadium; a mainstream aerospace-grade titanium alloy

Key Advantages:

① High strength; tensile strength far exceeds that of pure titanium and approaches that of 45-grade quenched and tempered steel;

② Low density and lightweight, resulting in significant weight reduction;

③ Corrosion resistance far superior to carbon steel and ordinary stainless steel; suitable for both low- and high-temperature operating conditions;

④ Can be heat-treated for strengthening, with hardness and wear resistance enhanced as needed;

Applications: Aerospace tooling, automation fixtures, military components, precision molds, drone equipment, and corrosion-resistant outdoor gear; it is the material of choice for custom industrial positioning pins.

Classification of Standard Structures

1. Standard Straight Cylindrical Locating Pins

These are smooth, cylindrical pins available in solid and hollow (elastic) varieties. They are pressed into holes with an interference or clearance fit and are used for permanent or semi-permanent alignment and fixation of two workpieces. This is the most basic type.

2. Stepped Locating Pins

These pins are thicker at one end and thinner at the other, with a stepped surface that prevents over-insertion. They are commonly used for precise positioning in multi-layer molds and jigs to prevent assembly misalignment.

3. Threaded Locating Pins (External Threads / Internal Threads)

Featuring external threads or an internal threaded hole at the tail end, these pins can be secured with a nut for easy disassembly without the need for hammering to remove them. They are commonly used for removable assemblies in equipment.

4. Hand-Tighten Knurled Locating Pins

The middle section features a knurled grip (either diamond or straight pattern) for a non-slip grip. The threaded end can be extended or retracted by hand, allowing for quick tightening and loosening without tools. Cylindrical pins at both ends provide bidirectional stops, enabling adjustment of the installation spacing. These are commonly used in inspection fixtures, instrument mounts, laboratory clamps, and quick-release fixtures that require frequent disassembly and reassembly.

5. Tapered Locating Pins

The head features a 1:50 tapered guide that automatically aligns for coaxiality during assembly, providing higher positioning accuracy. Suitable for high-precision molds and machine tool fixtures.

6. Pull-Out Pins / Handle-Type Locating Pins

Equipped with a pull ring or handle, these pins can be removed with a single pull. Commonly used for quick-release positioning in equipment doors, tilting brackets, and assembly line fixtures.

Major Surface Treatment Processes

Mirror Polishing: Provides a bright, glossy finish, reduces assembly friction, and prevents material buildup; commonly used in instruments and medical aesthetics equipment;
Passivation: Produces a matte finish in titanium's natural color, enhances natural corrosion resistance, offers the lowest cost, and is widely used in industrial applications;
Anodizing (Coloring): Can produce blue, gold, gray, or black anodized layers; increases surface hardness and wear resistance; used to distinguish specifications and models;
Nitriding: Surface nitriding hardening significantly improves wear resistance and prevents galling; suitable for applications involving frequent insertion and removal;
Knurling: Applied only to the grip area of knobs to prevent slipping during manual operation; this is the textured finish shown in the center of the image.

Core Performance Comparison (Titanium Alloy vs. Stainless Steel)

Performance Dimensions	GR5 Titanium Alloy Locating Pins	304 Stainless Steel Locating Pins
Density	4.51 g/cm³, 40% weight reduction	7.93 g/cm³
Corrosion Resistance	Virtually unaffected by seawater, strong acids, strong alkalis, and chloride ions	Resistant to general corrosion; prone to pitting and rusting in seawater
Magnetic	Completely non-magnetic	Weakly magnetic / Magnetic
Mechanical strength	High; load-bearing and shear resistance	Moderate
Biocompatible	Medical-grade for implants	Medical-grade 316L only available
Temperature Range	Stable operation from -200°C to 450°C	prone to creep at high temperatures

Key Industry Applications

Aerospace: Airframe tooling and fixtures, sheet metal assembly positioning, alignment pins for aircraft components-weight reduction and resistance to environmental corrosion;
Medical Devices: Surgical instrument positioning assemblies, positioning pins for orthopedic external fixation devices, precision stop components for medical aesthetics equipment-non-toxic and non-reactive;
Marine & Maritime Equipment: Seawater valves, underwater instruments, and positioning of ship components-resistant to seawater and salt fog corrosion, never rusts;
Chemical & Environmental Protection: Acid-base reaction equipment and electroplating production line tooling-resistant to highly corrosive media;
Automation & Mold Fixtures: Inspection fixtures, injection molds, and removable positioning components for assembly line carriers-lightweight and resistant to rust and seizing;
Semiconductors & Cleanrooms: Non-magnetic and free of impurity leaching, preventing contamination of wafers and precision components;
Outdoor Military & Equipment: Field equipment and fasteners for portable gear-designed for long-term, stable use in harsh environments involving rain, snow, and salt-alkali exposure.