Description

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Precision-machined cylindrical components engineered for rotational support, load distribution, and wear reduction in industrial assemblies. Built to custom engineering drawings with strict dimensional and geometrical tolerances.

Product Overview

CNC turned shaft bushings function as critical interface components in rotating or sliding assemblies. They maintain precise shaft alignment, absorb radial loads, and protect mating housings from friction-induced wear.

Our manufacturing setup utilizes multi-axis CNC lathes and Swiss-type machines to produce bushings ranging from miniature instrumentation sizes to heavy industrial diameters. Every batch is produced strictly to client CAD models and technical specifications, ensuring drop-in assembly without secondary modifications.

Technical Specifications

Parameter	Standard Capability / Range
Outer Diameter (OD)	5 mm to 300 mm (Tolerance down to +/- 0.005 mm)
Inner Diameter (ID)	3 mm to 250 mm (H7 / H8 fits standard)
Overall Length	Up to 400 mm
Concentricity / Runout	Within 0.01 mm
Surface Roughness	Ra 0.2 um to Ra 1.6 um
Available Materials	Carbon Steel (1045, 4140), Stainless Steel (303, 304, 316, 17-4PH), Brass (C36000), Bronze (C93200, SAE 660), Aluminum (6061, 7075)
Heat Treatment	Case Hardening, Through Hardening, Induction Hardening, Nitriding, Annealing
Surface Finishing	Zinc Plating, Electroless Nickel Plating, Passivation, Black Oxide, Hard Chrome Plating

Key Features

Tight Geometric Control: Advanced CNC turning and cylindrical grinding maintain strict concentricity, perpendicularity, and cylindrical tolerances to prevent eccentric wear during high-speed rotation.

Controlled Metallurgy: Sourced from certified mills with full Material Test Reports (MTRs / EN 10204 3.1). Material structures are preserved through optimized cutting parameters and minimized heat-affected zones.

Burr-Free Edge Integrity: All cross-holes, oil grooves, and internal edges undergo mechanical or chemical deburring to eliminate particulate contamination in hydraulic and pneumatic circuits.

Custom Lubrication Features: Internal oil grooves, lubrication holes, and graphite plug integrations can be machined per drawing requirements to ensure consistent grease or oil distribution.

Applications

Industrial Gearboxes: Supporting high-load gear shafts and reducing friction in enclosed transmission housings.

Hydraulic Pumps & Motors: Acting as internal journal bearings and valve spools where fluid pressure and tight clearances intersect.

Automotive Actuators & Steering: Managing linear and rotational motion in steering columns, pedal pivots, and transmission actuators.

Robotics & Automation: Providing high-precision guide bushings in robotic arms and linear slide modules where zero backlash is required.

Construction & Agricultural Equipment: Operating in high-shock-load pivot joints under heavy contamination and demanding lubrication cycles.

Customization Options

Production runs are executed entirely according to customer technical drawings and 3D models (STEP, IGES, SolidWorks). Customization parameters include:

Form & Features: Flanged bushings, stepped diameters, internal splines, keyways, oil grooves, and snap-ring grooves.

Tolerances: Customized fit classes (e.g., clearance fits, transition fits, interference fits) tailored to operating temperatures and thermal expansion coefficients.

Traceability: Laser-etched part numbers, batch codes, or client logos directly on the component body.

Packaging: VCI (Volatile Corrosion Inhibitor) anti-rust paper wrapping, vacuum-sealed plastic bags, and custom compartmentalized boxes for transit protection.

Quality Control & Inspection

Manufacturing compliance is verified across three distinct inspection stages:

Incoming Material Inspection: PMI (Positive Material Identification) spectrometer testing and dimensional checks on raw bar stock or tubes before cutting.

In-Process Inspection: First-article inspection (FAI) reports and routine operator checks using digital micrometers, bore gages, and optical comparators during CNC machining.

Final Outgoing Inspection: 100% or AQL-sampled inspection (per ISO 2859-1) utilizing CMM (Coordinate Measuring Machines) and air gages for critical ID/OD dimensions. Inspection reports and MTRs ship with every lot.

Production & Delivery

Machining Assets: Equipped with 20+ CNC turning centers, sliding-head Swiss lathes, and high-precision cylindrical grinders operating under strict shift schedules.

Lead Time: Prototypes delivered in 7 to 12 business days; production batches fulfilled in 3 to 5 weeks depending on volume and secondary plating requirements.

Logistics: Securely packed in export-grade wooden crates or heavy-duty cartons. Partnered with major air and ocean freight forwarders for global Door-to-Door or FOB delivery.

FAQ

Q: What file formats do you accept for custom shaft bushing RFQs?

A: STEP, IGES, Parasolid, DXF, and PDF drawings with explicit tolerances, surface finish requirements, and material callouts.

Q: Can you supply material test reports with the shipment?

A: Yes. EN 10204 3.1 mill test certificates and dimensional inspection reports are provided standard with every production batch.

Q: What is your minimum order quantity (MOQ) for custom turned bushings?

A: MOQ depends on material type and setup requirements, typically starting at 50 to 100 pieces for custom machined parts. Prototypes are available upon request.

Q: How do you prevent corrosion during international shipping?

A: Parts are coated with anti-rust oil, wrapped in VCI paper, sealed in moisture-barrier poly bags, and packed in sturdy corrugated boxes or fumigation-free wooden crates.

Request a Quote

Submit your CAD drawings and technical requirements to receive a formal quotation within 24 hours.
Required RFQ Details:
• 2D drawing / 3D model (PDF + STEP)
• Material grade (or operating environment conditions)
• Annual volume or batch quantity
• Target delivery schedule

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