CNC Turning H59 Brass Straight Bore Bushing Thin Wall Precision Brass Sleeve

Our custom CNC turning brass straight bore bushing, also named unthreaded brass isolation standoff and pure copper locating sleeve, is fully machined from solid H59 brass bar. The whole component is one-time shaped by CNC turning to machine inner hole, outer circle and two end flat surfaces without secondary splicing. Every thin wall brass tube bushing is precisely polished inside and outside to remove burrs, then treated with passivation for anti-tarnish and anti-oxidation performance. All finished precision brass sleeves go through 100% dimensional inspection to guarantee strict ±0.02mm tolerance. As an experienced OEM manufacturer, we provide full custom service to adjust length, outer diameter, inner bore size and surface finish of custom brass spacer according to customers’ technical drawings or physical samples, supporting small batch and mass production for various mechanical assembly positioning needs.

This cnc turning brass spacer, brass straight bore bushing and precision brass sleeve is widely used as locating, spacing and isolation components across multiple civilian industrial fields:

• Electronic equipment internal assembly, circuit board isolation positioning
• Small precision instrumentation, sensor fixing locating sleeves
• Household appliance hardware connecting spacer parts
• Automated equipment miniature mechanical positioning accessories
• Communication equipment internal isolation tube fittings
• Medical small device precision assembly components
• Office equipment miniature hardware locating bushings
• Automated fixture thin wall spacing tube parts

As a professional OEM custom manufacturer, we provide full one-stop custom service for all types of custom brass spacer, brass straight bore bushing and thin wall brass tube bushing:

• Custom machining based on customer technical CAD drawings, 2D/3D files.
• Sample customization service according to customer physical prototypes.
• Flexible adjustment of length, outer diameter, inner bore, wall thickness and shape.
• Optional customized surface treatment: polishing, passivation, nickel plating, gold plating.
• Flexible order quantity: support prototype small batch & large volume mass production.
• Custom labeling, customized packaging solutions for bulk orders.
• Free pre-production sample testing service before mass manufacturing.

• Solve loose positioning problem: ±0.02mm ultra-tight tolerance ensures consistent fit, avoids assembly clearance deviation caused by low-precision ordinary sleeves.
• Eliminate burr scratch trouble: full internal & external CNC polishing removes all micro burrs, prevents scratch damage to matching shafts or circuit boards during installation.
• Fix brass oxidation discoloration issue: passivation anti-oxidation treatment extends service life, no easy tarnish during long-term equipment storage and operation.
• Cut multi-process assembly cost: CNC one-step integral forming without secondary welding/splicing, reduces customer secondary processing labor cost.
• Meet thin wall miniaturization demand: stable thin wall brass tube bushing machining technology, no deformation during processing to match miniature compact equipment layout.
• One-stop OEM custom service: no need to find multiple suppliers, we adjust size & finish as required to match unique equipment assembly design.

• Raw Material Inspection: H59 brass bar chemical composition & hardness incoming test before cutting.
• In-process Machining Inspection: Real-time size sampling detection during CNC turning production.
• Post-polishing Appearance Check: 100% visual inspection for surface scratch, burr, deformation.
• Full Dimensional Precision Testing: Calipers & micrometers measure all critical OD, ID, length dimensions to verify ±0.02mm tolerance compliance.
• Passivation Effect Test: Anti-oxidation aging test to confirm surface protection performance.
• Final Finished Goods Random Sampling: Random batch inspection before packaging and shipment.
• Traceable production records for every batch of custom brass spacer and precision brass sleeve.

• Can you produce non-standard size custom brass spacer other than the standard 2.5*3.3mm size? Yes, we are an OEM custom manufacturer, we can machine any custom dimension brass straight bore bushing per your drawings or samples.
• What is the minimum order quantity for sample custom service? We support small batch prototype samples, no strict MOQ for pre-production testing orders.
• How long is the anti-oxidation lifespan after passivation surface treatment? Proper passivation treatment keeps H59 brass thin wall brass tube bushing from oxidation for more than 1 year under normal indoor storage environment.
• Can you provide dimensional inspection report for bulk order precision brass sleeve? Yes, we can offer full dimensional test report with your shipment upon request.
• What file formats do you accept for drawing custom service? We support PDF, DWG, STEP, IGES 2D/3D drawing files for CNC turning brass spacer customization.