CNC Turned Bushings
Custom CNC turned bushings can include controlled bores, outer diameters, shoulders, grooves, and selected lubrication features. Their purpose may involve guiding movement, maintaining location, or providing a replaceable contact surface in an assembly. These components appear in machinery, automotive mechanisms, and industrial equipment, where the fit between the bushing and its mating shaft or housing is a central part of the design.
Quick Info:
- Material: Brass, Carbon Steel, Stainless Steel, Aluminum
- Process: CNC Turning / Reaming / Drilling / Grooving
- Outer Diameter: 5–100 mm
- Wall Thickness: 1–20 mm
- Tolerance: ±0.02 mm
- Surface Finish: Ra 0.8–3.2 μm
- Lead Time: 7–15 working days
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Detailed Description
Sliding contact distinguishes CNC turned bushings from ordinary spacing sleeves. Internal bores guide shafts or mating pins, while the outside diameter locates the bushing in a support housing. Flanged ends keep the body from passing through the mounting opening.
Circumferential oil grooves and local drilled passages bring lubricant toward the contact region. Stepped outer profiles can locate against different housing surfaces, creating distinct positions for support and retention. CNC turning and boring establish the main cylindrical interfaces.
Oil Paths Across A Shaft Contact Surface
Flanged bushings may seat against a housing face while an internal groove connects to a radial oil hole. Lubricant reaches the shaft-contact region without a separate distribution piece.
Available Surface Finishes
- Nickel Plating: Improves corrosion resistance and surface durability.
- Zinc Plating: Economical protective finish for steel bushings.
- Passivation: Used for stainless steel corrosion protection.
- Anodizing: Suitable for aluminum locating and spacer bushings.
Nickel plating, zinc plating, passivation and anodizing appear among the specified treatments. Contact surfaces remain the main functional areas of the machined bushing.
Structural & Functional Breakdown
- Precision Bore Structure: Controlled internal diameter supports accurate shaft fit.
- Flanged Bushing Structure: Integrated flange provides axial positioning.
- Lubrication Groove Structure: Grooves can distribute lubricant across the contact surface.
- Stepped Diameter Structure: Multiple diameters allow location within different mating surfaces.
Lubrication grooves run through the bore or across accessible external surfaces. Flanged geometry adds an axial stop at one end of the cylindrical body.
Key Features
- Precision ID/OD Control: Turning and boring maintain consistent mating dimensions.
- Controlled Wall Thickness: Supports balanced geometry around the bushing circumference.
- Custom Fit Requirements: Clearance, transition or interference fits can be machined according to drawings.
- Integrated Functional Features: Oil holes, grooves and flanges can be added during production.
Wall thickness and concentric ID/OD geometry keep the locating and guiding surfaces part of the same component.
Applications
- Bearings & Shaft Supports
- Automotive Assemblies
- Industrial Machinery
- Hydraulic Equipment
- Automation Systems
Shaft support assemblies use bushings where a rotating or sliding member meets a stationary housing. Mechanical guides can employ similar contact surfaces around a reciprocating rod or pivot connection.
Hydraulic and automation equipment incorporate these compact wear interfaces close to shafts and moving links. Oil paths, a defined bore and an external locating surface give the bushing a role distinct from neighboring spacers. Mounted around shafts, CNC turned bushings define a compact interface for guidance and controlled contact.
Frequently Asked Questions
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What is the purpose of the bore inside a bushing?
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Machined bores form the guiding or sliding contact surface around a shaft or pin.
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How does a flanged bushing stay located axially?
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An enlarged flange meets the housing face and acts as a stop.
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Why are lubrication grooves machined into bushings?
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Grooves create distribution paths for lubricant along the contact region.
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What role do oil holes serve?
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Drilled passages can connect an available lubricant supply with a local groove or contact surface.
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Can a bushing have more than one outside diameter?
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Stepped turning produces different cylindrical zones for locating in adjoining mechanical features.
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How is a bushing different from a spacing sleeve?
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Bushings emphasize shaft contact and guidance; spacer sleeves mainly establish separation or protective coverage.
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Where are precision turned bushings used?
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Shaft supports, automotive mechanisms, industrial machinery and hydraulic equipment often include bushing interfaces.
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Which machining processes form the bushing surfaces?
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CNC turning and precision boring shape the outside diameter, bore, end faces and local shoulders.
