I. Product Overview

This hollow step column is made by CNC precision turning of metal tube materials, with a straight-through hollow cylinder matched with multi-level annular limiting steps on the outer wall. Both ends are open for bidirectional insertion assembly. The limiting steps accurately restrict the insertion travel, ensuring uniform size in mass assembly; the hollow interior can accommodate wire passing and air conduction, while also reducing the weight of the parts, widely used for precision electronics, sensors, and detection equipment positioning connections.
Supports processing of various tube materials such as aluminum alloy, brass, and stainless steel; inner and outer diameters, total length, step positions and quantities can be adjusted according to customer drawings and physical samples; capable of handling small batch trial orders and long-term large-scale supply; finished product dimensions and appearance are inspected item by item.

Two, Core Highlights of Craftsmanship and Workmanship

1. Pipe CNC integrated turning and shaping, coaxiality high
   Hollow cylinder body and external limiting steps are machined into one piece, without secondary assembly. The concentricity of the inner and outer circles is excellent, and the insertion is smooth without jamming.
2. Multi-level annular step limiting, assembly depth adjustable
   The outer wall annular boss serves as a positioningbenchmark, allowing for precise positioning in both directions, reducing manual debugging errors and improving assembly efficiency.
3. Hollow straight-through structure, versatile in function
   Internallylink up cavity, capable of passing wire bundles, introducing gases, and medium guidance, while effectively reducing weight, suitable for lightweighting equipment design.
4. Port-wide deburring treatment, without damaging the matching workpiece
   The inner and outer edges of the pipe are deburred and de-tinned, ensuring that the insertion and removal process will not scratch the sealing ring, plastic shell, or matching plug pin.

Section 3: Optional Customizable Raw Materials

1. 6061 Aluminum Alloy (Recommended)
   Lightweight, easy to machine, suitable for lightweight instruments, non-conductive structural positioning parts, supports anodized coloring.
2. H62 Brass
   Excellent conductivity, the first choice for electronic module conductive plug-in positioning pins.
3. 304 Stainless Steel
   Corrosion-resistant, suitable for long-term use in damp environments and gas flow conditions.
4. Low-carbon steel pipe
   Low-cost, general-purpose mechanical positioning components for indoor dry environments.

4. Optional Surface Treatment Processes

• Original Color Precision Machining: Basic General Plan, Internal Assembly Parts
• Hard Anodizing: Aluminum Alloy Hardness and Wear Resistance Enhancement
• Nickel Plating: Rust and oxidation resistance, preferred for electronic precision accessories.
• Galvanized: Economical anti-corrosion, general mechanical accessories
• Mirror polishing: Exposed components with high appearance requirements

Chapter 5: Applicable Application Scenarios

Sensor module plug-in positioning hollow cylinder
✅ Internal parts support, conductive positioning parts for electronic appliances
✅ Test instrument fitting bidirectional plug-in connection components
✅ Miniature equipment miniature gas conduit sleeve
✅ Lightweight Limiting Assembly Parts for Automated Production Lines

Six, Core Product Advantages

1. Numerical control precision machining, all free customization of step quantity, spacing, and inner/outer hole diameters.
2. Hollow integrated structure, combining positioning, weight reduction, and wiring ventilation for multiple uses
3. Bi-directional plug-in design, flexible installation, compatible with various equipment structures
4. A variety of materials and surface treatments are available to meet different requirements such as conductivity, corrosion resistance, and lightweighting.
5. Single piece sample supported, stable delivery time, available for long-term bulk supply

Chapter 7: Common Procurement Q&A

Q1: Can the number of steps and the distance between steps be freely changed?
A: Sure, the number, location, and width of the steps can be adjusted as per the drawing requirements.
Q2: Can the cavity be made into a blind hole or a style with one end closed?
A: Support, both through-hole and single-sided blind hole structures can be processed.
Q3: Which material is recommended for conductive use?
A: Preferably use H62 brass, which can be paired with nickel plating for stable oxidation prevention and blackening resistance.
Q4: Can the corresponding solid pin set be processed together with the complete set?
A: Support, synchronous production of connecting rod and matching pin, ensuring the fit gap of the plug-in.