Custom CNC Irregular Profile Locating Shaft Pins, High Precision Mechanical Assembly Parts

 Custom CNC Irregular Profile Locating Shaft Pins, High Precision Mechanical Assembly Parts

1. Product Overview

Custom CNC Irregular Profile Locating Shaft Pins are high-precision non-standard positioning assembly components manufactured by integrated turn-milling CNC machining. Different from ordinary cylindrical pins, these locating pins adopt customized irregular profiles according to assembly track, limiting space and guiding requirements, including stepped flat cuts, bilateral flats, tapered guiding ends, limiting grooves and eccentric steps. Processed from solid stainless steel, carbon steel, aluminum alloy and brass, each pin features tight control of profile dimension, radial runout, fitting tolerance and surface roughness. Widely used for precise positioning, anti-rotation, stroke limiting and module alignment in automation tooling, testing fixtures and precision transmission mechanisms. Customization based on drawings and samples is available, covering prototype sampling to mass production.

2. Core Product Advantages

1. Composite Irregular Profile for Angular Positioning & Anti-Rotation

Unlike standard cylindrical pins, the integrated irregular profile enables circumferential anti-rotation without extra locking components, simplifying mechanical structure. Custom shapes meet requirements of groove alignment, angle positioning and directional insertion for complex mechanisms, improving operation consistency of equipment.

2. Integrated Turn-Milling Machining, No Assembly Deviation

One-step composite CNC forming processes contours, steps, flats and guiding ends simultaneously. It eliminates position errors caused by welding or secondary processing. Smooth surface transition without sharp burrs ensures smooth insertion and extraction and prevents scratching mating holes.

3. Customizable Fit Tolerance for Reliable Repeated Positioning

Clearance fit, transition fit and interference fit can be customized according to assembly requirements. Low dimensional dispersion within batches guarantees stable repeated positioning accuracy. The pins maintain consistent alignment under long-term reciprocating motion and frequent disassembly, reducing assembly defects.

4. Diverse Material & Surface Treatment Options for Varied Load Conditions

Materials can be selected based on load and working environment: tempered carbon steel for medium-load wear-resistant scenarios; stainless steel for humid, oily and mildly corrosive environments; lightweight aluminum alloy; non-magnetic brass for precision testing instruments. Optional nickel plating, zinc plating, black oxide, polishing and passivation enhance hardness, wear resistance and anti-rust performance.

5. Targeted Customization for Equipment Iteration

Free from standard size limitations, profile shape, length and dimension can be optimized along with equipment upgrading. We provide one-stop service from prototype verification and trial production to mass supply, ideal for new product development of automation equipment and tooling manufacturers.

3. Application Scenarios 

✅ Anti-rotation locating pins for automated production line tooling jigs ✅ Irregular profile positioning shafts for precision testing modules ✅ Stroke limiting guide pins for intelligent mechanical transmission units ✅ Angle positioning support pins for non-standard assembly stations ✅ Custom high-precision locating components for mechanical equipment upgrading

4. Quality Assurance & Service

Every CNC irregular profile locating shaft pin undergoes comprehensive inspections including dimension measurement, runout verification, roughness testing, assembly simulation and burr removal. Inspection documents can be provided upon request. Fast sampling delivery is supported. We offer one-stop non-standard precision machining solutions, supplying stable custom locating pin assemblies for global automation, precision equipment and tooling industries.