Pin Shaft

What is a Pin Shaft?

A Pin Shaft (also known as Shaft Pin or Dowel Pin Shaft) is a cylindrical mechanical component used to transmit rotational or linear motion between connected parts while maintaining precise alignment. These components are critical in high-performance systems where tight tolerances, high strength, and wear resistance are essential.

Our pin shafts are manufactured from premium Materials such as alloy steel (AISI 4140, 4340), stainless steel (304, 316), and hardened tool steel. Typical diameters range from 3 mm to 150 mm, with length-to-diameter ratios of 2:1 to 10:1 based on the application. To ensure smooth operation and minimal wear, surface finishes are controlled within 0.4–1.6 μm Ra.

Key Characteristics

• Precision Alignment – Concentricity maintained within 0.01–0.05 mm TIR for high-speed and critical assemblies.

• High Load Capacity – Supports static loads up to 500 kN for shafts 100 mm and above.

• Fatigue Resistance – Heat-treated shafts offer endurance limits of 400–600 MPa.

• Corrosion Resistance – Stainless steel pin shafts and special coatings provide long-term protection in harsh environments.

• Thermal Stability – Operates reliably between -40°C to +200°C; special alloys up to 500°C.

Technical Specifications

• Tensile Strength: 800–1200 MPa (for alloy steel)

• Hardness: 30–60 HRC depending on heat treatment

• Dimensional Tolerance: h6/h7 per ISO 286-1

• Surface Finish: 0.4–1.6 μm Ra

• Surface Treatment Options: Chrome plating (10–30 μm), nitriding (0.1–0.3 mm), phosphate coating

Manufacturing Process

Our pin shafts are produced using advanced manufacturing technology to achieve exceptional accuracy and consistency:

• CNC Machining – For precise dimensions and repeatability

• Turning & Milling – To achieve complex geometries

• Grinding & Lapping – For ultra-smooth surfaces and close tolerances

• Heat Treatment – Hardening for improved strength and wear resistance

Material Options & Benefits

• Carbon Steel Pin Shaft – High strength and cost-effective for heavy machinery

• Stainless Steel Pin Shaft – Excellent corrosion resistance for marine and chemical environments

• Alloy Steel Pin Shaft – Superior toughness for heavy-duty pin shafts in Automotive and aerospace applications

• Titanium Pin Shaft – High strength-to-weight ratio for aerospace and robotics

• Brass & Aluminum Pin Shaft – Lightweight, corrosion-resistant, ideal for special precision parts

Surface Treatment Options

• Polishing – Smooth finish for reduced friction

• Electroplating (Nickel, Zinc) – Corrosion protection and improved aesthetics

• Black Oxide Coating – Mild corrosion resistance with a dark finish

• Anodizing (for Aluminum) – Increased hardness and corrosion resistance

• Chrome Plating – High wear resistance and improved surface hardness

Precision & Quality Control

We ensure high precision pin shafts through rigorous quality management:

• Tolerance Accuracy: ±0.01 mm or better

• Surface Roughness: Ra ≤ 0.2 μm for precision applications

• Testing & Inspection: CMM measurement, hardness testing, and surface roughness analysis

• Compliance: ISO 9001:2015 and other industry standards

Applications

Our custom pin shafts are widely used in:

• automotive Systems – Transmission gears, suspension linkages, and steering components

• Industrial Machinery – Robotics, automation systems, and textile machinery

• Aerospace Components – Flight control systems and structural joints

• Construction Equipment – Hydraulic cylinders and heavy-duty joints

• Marine & Offshore Equipment – Corrosion-resistant shafts for harsh conditions

Maintenance Tips

To extend the life of your pin shaft, follow these best practices:

• Lubrication: Use EP grease (NLGI Grade 2) and maintain proper oil film thickness (1–5 μm)

• Wear Monitoring: Check diameter reduction with micrometer (0.001 mm resolution); acceptable limit <3%

• Corrosion Prevention: Apply protective coatings such as zinc-nickel or electroless nickel plating for marine use

• Alignment Check: Maintain <0.05 mm/m parallelism with laser alignment tools

• Replacement Criteria: Replace if microcracks, deformation >0.1%, or roughness increase >50% of original Ra

FAQ

Q1: Can you make custom size pin shafts?
Yes, we are a custom size pin shaft manufacturer offering OEM solutions for industrial and automotive applications.

Q2: What materials do you offer?
We provide carbon steel, stainless steel, alloy steel, titanium, brass, and aluminum pin shafts.

Q3: What is your tolerance capability?
Our precision pin shafts achieve tolerances up to ±0.01 mm and surface finish as low as Ra 0.2 μm.

Q4: What is the delivery time?
Standard lead time is 7–15 days, depending on complexity and quantity.

Why Choose Us?

As a high precision pin shaft supplier and OEM pin shaft manufacturer, we deliver custom pin shafts engineered for durability, accuracy, and performance. Whether you need small diameter pin shafts, heat-treated shafts, or heavy-duty pin shafts for automotive and industrial equipment, we have the expertise and capability to meet your needs.