Our step brass hollow sleeve is a fully custom CNC turning machined component fabricated from seamless brass tube raw stock. The base raw material is 6mm outer diameter brass tubing with a 4mm through inner bore, processed on high-precision CNC turning equipment to turn one segment down to a 5.5mm outer diameter stepped section.

After mechanical CNC turning processing, every brass component undergoes full degreasing ultrasonic washing to eliminate machining oil residues, then chemical passivation treatment to boost brass corrosion resistance and preserve its metallic luster long-term.

As a dedicated CNC machining manufacturer, we deliver full OEM custom service for this brass sleeve and all similar tubular brass fittings. We welcome clients to submit custom engineering drawings or physical samples for bespoke dimension, tolerance, surface finish modification to match unique industrial equipment assembly requirements.

• Precision electronic equipment internal connecting fittings
• Small automation machinery bearing sleeves & spacer bushings
• Medical device miniature brass connecting tubular parts
• Household appliance internal precision assembly spacers
• Testing instrument, sensor internal brass lining sleeves
• Office automation equipment small brass tubular components
• Hydraulic micro-valve small brass reducing tube connectors

• Drawing Customization: Accept customer 2D/3D engineering drawings to customize outer diameter, inner bore, length, step size, tolerance via CNC turning
• Sample Customization: Process prototype samples based on customer supplied physical samples before mass order through CNC turning technology
• Material Customization: Supply alternative copper alloy materials upon client demand
• Surface Finish Customization: Adjust surface treatment (polishing, plating, passivation variants) as requested
• Tolerance Customization: Tighten dimensional tolerance standards for high-precision industrial CNC turning parts
• Batch Customization: Support low-volume trial orders and large-scale mass production
• Packaging Customization: Custom export safe packaging for overseas wholesale clients

• Advanced CNC turning processing with ±0.01mm tight tolerance, uniform dimensions in every production batch, no assembly mismatch issues
• Standard passivation post-processing delivers long-lasting anti-corrosion performance, avoids surface discoloration during equipment storage & operation
• We source qualified seamless brass tube raw stock in bulk, no material supply shortage delays for your CNC turning part orders
• Our engineering team reviews customer drawings/samples fast, offers professional technical feedback to optimize part structure for lower CNC turning production cost
• Full automatic ultrasonic degreasing cleaning removes all cutting oil residue, clean inner and outer tube surfaces for smooth assembly
• Flexible CNC turning production line supports both small prototype batches and large wholesale mass orders, meets all client order volume demands

• Raw Material Inspection: All incoming brass tube blanks pass outer diameter, inner hole and material composition test before entering CNC turning production
• In-process CNC Turning Inspection: Operators conduct real-time dimensional sampling check during CNC turning processing, coordinate measuring machine spot check for precision validation
• Post Surface Treatment Inspection: Full visual inspection after degreasing & passivation, screen out parts with surface stains, scratches or incomplete passivation coating
• Finished Product Full Dimensional Test: Random batch sampling to verify all key dimensions (outer diameter, length, inner bore) meet drawing tolerance requirements for CNC turning components
• Batch Quality Record Keeping: Save all inspection reports for every production batch to enable full traceability of all CNC turning brass parts
• Pre-shipment Quality Audit: Final overall check before export packaging to guarantee zero defective CNC turning goods delivered to overseas clients