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Stainless Steel Hexagonal Rivets Precision Draft Beer System Parts CNC Machining Services
Stainless steel hexagonal rivets, used as precision components in beer systems, with CNC machining services.
Application Characteristics of Stainless Steel Bushings in Beer Machine Components
Core Performance Advantages
Excellent corrosion resistance: 304/316 stainless steel bushings resist corrosion from acidic substances, CO₂ and cleaning agents, preventing rust and harmful precipitation
Food-grade hygiene: Non-porous surface, easy to clean and sterilize, meeting food contact material standards
Wear resistance and friction reduction: Reduces wear of shafts and seals, extending service life for reciprocating/rotating motion
Good temperature adaptability: Withstands frequent temperature cycles during brewing (0-100°C) and cleaning processes
Structural adaptability: Machinable into thin-walled, stepped, oil-grooved or sealed structures for precision matching requirements
Typical Application Scenarios
Pumps/valve groups: Shaft sleeves, valve core bushes for guiding and sealing in rotating/reciprocating motion
Filling/dispensing mechanisms: Piston bushes and guide bushes ensuring filling accuracy and leak-tightness
Fermentation/bright beer tanks: Mixing shaft bushes and manhole sealing bushes resistant to fermentation liquid corrosion
Pipes/connectors: Clamp connector bushes and gasket seats ensuring sealing and hygiene of pipeline connections
Material Selection
304 stainless steel: Cost-effective, suitable for general corrosion resistance in most common working conditions
316 stainless steel: With molybdenum, stronger resistance to chloride ions and acid, ideal for harsh conditions
Common Problems in Machining Stainless Steel Bushings and Solutions
Built-up Edge (BUE) and Tool Welding
Problems: Chips adhere to cutting edge, causing surface scratches, dimensional errors and tool chipping
Causes: High toughness and low thermal conductivity of stainless steel, concentrated cutting heat and high friction
Solutions: Use ultra-fine grain cemented carbide tools with TiAlN or TiCN coating, reduce cutting speed and feed rate, apply extreme-pressure emulsions with high-pressure internal cooling
Thermal Deformation and Dimensional Out of Tolerance
Problems: Out-of-tolerance inner/outer diameter, roundness and cylindricity after machining
Causes: Cutting heat, uneven cooling, internal stress and poor rigidity of thin-walled parts
Solutions: Process flow optimization, use elastic expanding sleeves, adopt layered cutting with small finishing allowance, maintain sufficient cooling
Poor Inner Hole Accuracy
Problems: Deflection, large ovality and excessive taper after drilling/boring
