2025-07-28 17:29:49
Custom Clevis Pins are specialized Fasteners designed for pivot and hinge applications where shear strength and alignment precision are critical. These pins feature a cylindrical shaft with a drilled hole at one end for cotter pin retention, typically manufactured from grade 8 steel (150 ksi tensile strength) or stainless steel 316 (90 ksi yield strength). Unlike standard clevis pins, custom variants are engineered to meet exact dimensional tolerances (as tight as ±0.0005 inches on diameter) and surface finish requirements (Ra 16 µin or better for high-cycle applications).
Key Characteristics:
Dimensional Precision: Custom pins maintain diameters from 1/8" to 4" with length-to-diameter ratios up to 20:1 while preventing deflection
Material Versatility: Available in AISI 4140, 17-4PH stainless, and titanium alloys for corrosion resistance
Load Capacity: Shear strength ratings between 25,000 to 250,000 lbs depending on material and heat treatment
Engineered clevis pins demonstrate quantifiable advantages over standard fasteners:
Fatigue Life: Shot-peened custom pins achieve 107 cycles at 60% of ultimate tensile strength (per ASTM E466 testing)
Corrosion Resistance: Passivated stainless variants withstand 1,000+ hours in salt spray (ASTM B117)
Temperature Range: High-temp alloys maintain mechanical properties from -40°F to 1200°F (-40°C to 649°C)
Wear Resistance: Hard chrome-plated pins show <0.001" wear="">after 50,000 articulation cycles (per SAE J1075)
Custom clevis pins serve mission-critical functions across industries:
In aircraft control systems, NASM clevis pins with 0.0002" radial clearance connect flight control surfaces, undergoing 109 stress cycles during service life. Boeing 787 Dreamliners utilize titanium Ti-6Al-4V pins with 160 ksi shear strength for weight reduction.
Caterpillar excavators employ 2.5" diameter pins with case-hardened surfaces (60 HRC) in bucket linkages, sustaining 500,000 lb-ft bending moments during digging operations.
Wind turbine pitch systems require 316L stainless pins with PTFE coatings to prevent fretting corrosion under 5-15 Hz oscillating loads.
Subsea ROV manipulators use Inconel 718 pins rated for 10,000 psi hydrostatic pressure and 3% seawater NaCl exposure.
Proper care extends clevis pin service life by 300-400%:
Inspection Schedule:
Aviation: Eddy current testing every 500 flight hours
Industrial: Dimensional checks at 6-month intervals
Marine: Ultrasonic thickness measurement annually
Lubrication Requirements:
High-load applications: MIL-PRF-81322 grease (wide temperature range)
Food processing: USDA H1 lubricants
Extreme pressure: Molybdenum disulfide coatings (0.0003" thick)
Replacement Criteria:
Diameter reduction exceeding 1% of nominal size
Visible pitting covering >5% of surface area
Cotter pin hole deformation beyond +10% original diameter
Advanced production techniques ensure precision:
CNC Turning: Achieves ±0.0001" concentricity on diameters
Roll Threading: Creates 120% stronger threads vs cut threads
Cryogenic Treatment: Enhances martensitic transformation for 15% wear resistance improvement
Room 101, Building 6, No. 43, Kwai Ching Road, Qingxi Town, Dongguan City, Guangdong Province, China
+86 13620070919 +86 13580778676
Dongguan Tianci Screw Products Co., Ltd, founded in May 2009, is an industrial manufacturing plant.
Specializing in the development and production of standard, non-standard fasteners customized, pressure riveted parts, shaped bolts and nuts, precision small hardware and so on.
