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Lightweight Through Hole Screws Chemical Nuts CNC Turning Service For Precision Hardware
Through-hole screws, chemical nuts, CNC turning service for precision hardware
Stainless Steel Machined Pins
Applications, Characteristics & Advantages in Chemical Equipment Hardware
Application Scenarios of Stainless Steel Machined Pins in Chemical Equipment
Stainless steel machined pins are key positioning and connecting components widely used in chemical equipment, featuring excellent corrosion resistance, high dimensional precision, and stable mechanical performance. They are particularly suitable for harsh working conditions such as corrosion, high temperature, low temperature, vibration, and frequent maintenance.
Positioning and locking of equipment shells and internals: Positioning of reactors, towers, filters, heat exchangers, and pressure vessels. They ensure accurate assembly and stable operation under pressure and vibration, and resist corrosion from chemical media.
Shaft connection and transmission in pumps and valves: Used as valve stems, pump shafts, connecting pins, and limit pins for various fluid control components. They maintain concentricity and wear resistance in long-term operation, and are compatible with corrosive liquids and gases.
Positioning for laboratory and pilot equipment: Precision positioning pins for stirrers, mixers, sampling devices, and testing instruments. They provide stable positioning with tight tolerances and support repeated assembly and disassembly.
Anti-corrosion and explosion-proof areas: Made of 304, 316L, titanium alloy, and other corrosion-resistant materials, they are widely used in strong acid, alkali, salt spray, and chlorine-containing working environments. Non-sparking alloy pins can be used in explosion-proof zones to improve safety.
Modular chemical equipment assembly: Positioning and connecting pins for modular units such as filter components, separation devices, and pipe modules. They improve assembly efficiency and interchangeability while ensuring structural stability.
Core Characteristics of Stainless Steel Machined Pins
High corrosion resistance: Mainly made of 304, 316L stainless steel, with passivation, electropolishing, or pickling surface treatment. Resistant to acid, alkali, salt, and chemical media, suitable for long-term service in harsh chemical environments.
High precision and good concentricity: CNC machined with tight dimensional tolerances and excellent roundness, straightness, and coaxiality. Ensures stable fit, smooth rotation, and reliable positioning in precision components.
High strength and wear resistance: Solid bar machining ensures uniform internal structure, high mechanical strength, and good fatigue resistance. Suitable for rotating, reciprocating, and load-bearing parts in equipment.
Stable anti-loosening and anti-falling performance: Can be designed with grooves, steps, threads, or locking structures to prevent pin displacement or falling under vibration. Improves operational safety and reduces maintenance frequency.
Good cleanability: Smooth surface, no burrs, no dead zones, easy to clean and sterilize. Suitable for clean areas in chemical, pharmaceutical, and food industries.
Strong customization capability: Customizable in diameter, length, steps, grooves, threads, and chamfers to meet special structural requirements. Ideal for non-standard chemical equipment.
Core Advantages of CNC Machined Stainless Steel Pins
Compared with cold forming, stamping, or simple turning, CNC machining provides unique advantages:
Extremely high dimensional precision: Dimensional tolerance can reach ±0.01 mm, with stable straightness, coaxiality, and verticality. Satisfies high-precision positioning and transmission requirements of chemical equipment.
Complex one-piece forming: One clamping completes multiple processes: turning, milling, grooving, threading, chamfering, and facing. Produces complex-shaped pins that cannot be manufactured by conventional processes.
Complete material performance: Machined from solid stainless steel bar, maintaining original material density and mechanical properties. No internal stress or cracks, ensuring reliability in high-pressure and corrosive environments.
Excellent surface quality: Achieves Ra ≤ 0.8 μm or higher surface finish, smooth, burr-free, and easy to passivate and polish. Improves corrosion resistance and cleanability.
Flexible small-batch production: Suitable for small-batch, multi-variety, customized production commonly required in chemical equipment. Short lead time, stable quality, and high consistency.
Quality control and traceability: Full-process CNC parameter control ensures stable quality. Supports complete inspection reports to meet GMP, FDA, and equipment quality system requirements.
Selection and Processing Guidelines for Chemical Equipment
Material Selection
General corrosion environment: 304 stainless steel
Strong corrosion / chloride ion environment: 316L stainless steel
High-corrosion and high-temperature conditions: titanium alloy, Hastelloy, etc.
Explosion-proof areas: non-sparking copper alloy or special alloy
Structure and Precision Design
Select appropriate tolerance grades according to fit: clearance fit, transition fit, or interference fit.
Add locking grooves or steps for vibrating working conditions to improve anti-loosening performance.
Surface Treatment
Passivation: improves corrosion resistance
Electropolishing: improves smoothness and cleanability
Pickling: removes oxide scale and enhances corrosion resistance
Advanced Manufacturing Capabilities
We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.
Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.
Company Overview:
Total employees: 300
Technicians: 20
Engineers: 10
Quality control personnel: 15
Equipment: Over 300 pieces
Management system: 8S management
Certifications: ISO9001 and TS16949 automotive certifications
