Custom CNC Machined Bushings

Bushings typically operate under demanding conditions involving high loads, heavy wear, frictional heat, and corrosion. Even minor deviations in dimensional tolerance, concentricity, surface finish, or material performance can lead to abnormal wear, increased vibration, lubrication failure, and premature shutdown.
VMT specializes in precision CNC custom bushing manufacturing. From thin-wall bushings and long cylindrical spacers to complex non-standard geometries, we machine strictly to your drawings with full control over critical dimensions and GD&T tolerances, ensuring longer service life, more stable operation, and lower maintenance costs for your core assemblies.

±0.01mm Bore & Concentricity Accuracy
Distortion-Free Thin-Wall (1.0mm)
Free Expert DFM
CMM Inspection
Material Certification (MTR)
20× Microscope Deburring Check

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ISO 9001 IATF 16949 RoHS Certification

12 quality inspection procedures

Production Yield Rate Reaches 99.98%

40 Materials/Finishes Choose

16 Years of CNC Machining Experience

What kind of Bushings Can We Make?

We manufacture custom bushings strictly according to your provided drawings. Our customization capabilities cover a wide range of geometries, including sleeve, flange, split, tapered, and threaded/grooved types. We have produced over 10,000 custom bushing assemblies for numerous OEMs worldwide, covering demanding industries such as automotive, heavy construction, medical, automation, and aerospace.

Custom Flange Bushings

CNC machined from bronze with graphite plugs, these components provide self lubricated, maintenance free operation under heavy industrial loads.

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Custom Tapered Bushings

Precision turned steel parts featuring a split design and blackened finish, engineered for secure, high torque shaft clamping in power transmissions.

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Custom Sleeve Bushings

Heavy duty bronze sleeves with multi hole non standard flanges, precision bored to ensure exact alignment in complex mechanical assemblies.

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Custom Stainless Steel Wear Bushings

CNC turned components with integrated shoulder steps, offering high corrosion resistance and precise axial positioning for rotating shafts.

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Custom Threaded Bushings

Aluminum sleeves featuring precision internal threads and a knurled OD surface for secure grip and reliable component interfacing.

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Custom Adapter Bushings

Precision brass fittings engineered with multi step bores and threaded face holes, providing seamless size transitions for specialized industrial machinery.

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Custom Split Bushings

CNC machined bronze halves with embedded graphite plugs, engineered with a split design to ensure easy assembly in heavy duty machinery.

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Custom Wrist Pin Bushings

Precision turned bronze sleeves featuring a custom rectangular oil slot, delivering reliable lubrication and wear protection for high speed connecting rods.

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Custom Knurled Bushings

Brass sleeves precision machined with straight knurled outer diameters and deep internal threads, designed for secure integration into molded components.

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Struggling with inconsistent press-fit or shaft clearance in your custom bushings?

Free DFM Review: Before we cut a single part, our engineers review your drawing for fit and tolerance feasibility. If your press-fit interference or shaft clearance spec carries any risk of assembly failure, we flag it upfront so problems are resolved at the design stage, not on your assembly line.
±0.005mm Bore & OD Tolerance: Critical mating dimensions are held to ±0.005mm consistently across every part. Single-setup machining eliminates re-chucking error at the source, while in-process gauging at every critical feature ensures dimensional stability throughout the entire run, not just on first articles.
100% CMM Dimensional Verification: Every CNC machining bushing is measured on a CMM before it leaves our facility. You receive a full dimensional report with each order, giving you traceable proof that every critical dimension meets your drawing requirements

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Are poor concentricity and roundness causing premature wear on your custom machined bushings?

Single-Setup Machining: When bore and OD are machined in separate setups, re-chucking introduces runout errors that no inspection process can fully correct. At VMT, both features are completed in a single setup, eliminating the root cause of concentricity error rather than compensating for it after the fact, so your bushing runs true from day one.
Independent Control of Concentricity and Roundness: Concentricity and roundness are controlled independently throughout the machining process. Stable tooling, optimized cutting parameters, and in-process inspection help maintain consistent circular geometry, while single-setup machining minimizes alignment errors between the bore and outer diameter, ensuring even load distribution across the full bearing surface.
Roundness Tester and CMM Verification: Roundness is measured on a dedicated roundness tester, while concentricity and other GD&T tolerances are verified on a CMM. You receive a full geometric inspection report with every order, giving your traceable data against your drawing requirements and full confidence before installation.

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Precision Bushing Machining Capabilities

Capability	Specification	What It Solves
CNC Turning (OD)	$2.0\text{ mm} - 350\text{ mm}$	Optimized for long sleeves, flanged, and heavy-duty industrial bushings.
Swiss Machining	$1.0\text{ mm} - 38\text{ mm}$	Designed for ultra-thin wall, micro, and high-aspect-ratio slender sleeves.
CNC Milling / Live Tooling	Up to $600\text{ mm} \times 500\text{ mm}$	For complex geometric features, split bush housings, and non-circular flanges.
Min. Wall Thickness	$1.0\text{ mm}$	Achieves distortion-free turning via full-wrap soft jaws and step-feeding.
Inner Bore Tolerance	Down to $\pm0.01\text{ mm}$	Perfect for interference or clearance fits; prevents total assembly backlash.
Concentricity & Roundness	Within $0.01\text{ mm}$	Maintained via single-setup machining to minimize shaft runout errors.
Surface Roughness	Up to $Ra\ 0.4\ \mu\text{m}$ (As-Machined)	Smoother bearing surfaces to reduce friction and wear rate.
Oil Groove Processing	Spiral, 8-shape, loop, and cross types	Engineered to retain lubricant film and reduce dry-contact wear in low-speed or oscillating applications.
Materials	Bronze: C932, C954, Aluminum Bronze Steel: 4140, 8620, O1 Hardened Steel Stainless: 303, 316, 440C Plastics: PEEK, POM (Delrin), PTFE	Fully certified wear-resistant materials with batch MTR and PMI traceability.
Quality Verification	CMM Inspection & Roundness Tester	100% geometric compliance report provided with every shipment.

Custom Bushing Manufacturing Processes Built for Precision

Every custom machined bushing presents unique challenges—wall thickness, bore geometry, surface finish requirements, and material properties all vary depending on the application. VMT helps you select and combine appropriate machining methods based on your drawings to ensure that every critical dimension of the bushing meets requirements.

CNC Turning

The foundation of bushing production. Machines OD, ID, and end faces in a single setup, holding bore and concentricity tolerances down to ±0.005mm for standard sleeve and flanged bushings.

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Swiss Machining

Ideal for slender, small diameter bushings under 38mm. The guide bushing supports the workpiece during cutting, enabling distortion free machining of thin-wall and high aspect ratio geometries.

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Rapid CNC prototyping and manufacturing services

CNC Milling

Handles non-rotational features that turning cannot — keyways, cross holes, flat faces, and irregular flanges. Applied where bushing geometry extends beyond simple cylindrical forms.

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Cylindrical Grinding

Used after hardening to restore dimensional accuracy on OD and ID. Achieves surface finish to Ra 0.4μm and tighter tolerances on hardened steel bushings where turning alone is insufficient.

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Boring

Corrects and refines bore geometry after initial drilling or turning. Delivers straightness and cylindricity control critical for long bushings where bore deviation accumulates over length.

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Deep Hole Drilling

Applied to long cylindrical spacers and sleeves with high L/D ratios up to 50:1. Maintains drill deviation within 0.1mm per 100mm, ensuring bore straightness through the full length.

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Reaming

Final sizing of precision bores to achieve tight dimensional tolerance and consistent surface finish. Ensures repeatable fit for interference or close clearance shaft assemblies.

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Honing

Produces crosshatch surface patterns on inner bores to Ra 0.05–0.2μm. Improves oil retention and reduces break-in wear for bushings operating under continuous sliding contact.

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Wire EDM

Machines hardened materials and split bushing slots without heat-affected distortion. Holds tolerances to ±0.002mm on features that conventional cutting tools cannot reach.

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Deburring

Every bushing undergoes deburring under 20× microscope verification after machining. Ensures all bore edges, oil groove intersections, and chamfers are clean and burr-free before shipment.

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Not Sure Which Material Is Most Suitable for Your Bushings?

Material selection is as critical as machining precision for custom CNC machined bushings. The table below outlines commonly used grades, along with their key advantages and limitations, to help you identify the right material for your application.

Material	Grades	Key Advantages	Limitations	Best For	Typical Applications
Bronze	C93200, C95400, C86300, C93700, C90500	Self-lubricating, excellent wear resistance, high load capacity	Higher cost than steel, limited in highly corrosive environments	High load, low speed, self-lubricating applications	Engineering machinery, connecting rods, swing arm bushings
Alloy Steel	4140, 5140, 52100, Nitriding Steel	High strength, impact resistance, hardenable	Requires lubrication, susceptible to corrosion	High load, high impact, heavy-duty applications	Hydraulic equipment, mining machinery
Carbon Steel	1018, 1045, 12L14, Q235	Cost-effective, easy to machine, widely available	Lower strength than alloy steel, requires lubrication	General purpose, standard load applications	Agricultural machinery, conveyor systems
Stainless Steel	303, 304, 316, 17-4PH, 420, Duplex 2205	Corrosion resistant, hygienic, high strength options available	Lower wear resistance than bronze, higher cost	Corrosive, food and medical applications	Medical devices, food machinery, marine equipment
Aluminum	6061-T6, 7075-T6, 2024-T4, 6082-T6	Lightweight, good corrosion resistance, easy to machine	Lower load capacity, softer surface	Lightweight, low to medium load applications	Drones, robotics, automation equipment
Brass	C36000, C37700, H62, HPb59-1	Good machinability, non-sparking, electrically conductive	Low load capacity, limited strength	Low load, electrical conductivity requirements	Instrumentation, pneumatic components, electrical equipment
Engineering Plastics	PEEK, PTFE, POM, Nylon PA66, UHMW-PE, PET	Self-lubricating, chemical resistant, lightweight	Lower load capacity, temperature sensitive	Lubrication-free, light load, corrosive environments	Medical devices, semiconductor equipment, automation
Exotic Alloys	Ti-6Al-4V, Inconel 718, Monel 400, Hastelloy C276	Extreme temperature and corrosion resistance, biocompatible	High cost, difficult to machine	Aerospace, marine, chemical processing	Aerospace structures, offshore equipment, chemical reactors

Surface Treatment Options for Custom CNC Machined Bushings

The right surface treatment extends the service life of your bushings and enhances performance under specific operating conditions. As experienced custom bushing manufacturers, VMT offers a full range of finishing options to match your material, load environment, and industry requirements.

Anodizing(Type II & Type III)

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Plating（nickel）

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Polishing

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Passivation

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PVD Coating

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Blackened

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Nitriding

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Phosphating

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VMT Machining Case: C932 Bronze Joint Bushings for Collaborative Robotics

A German collaborative robot joint module supplier was looking for a reliable source for their robotic arm joint bushings. Their previous supplier had delivered two batches, with 8% of bushings requiring a mallet to force into position on the assembly line.
The drawing specified C932 bronze with an H7 inner bore and f7 outer diameter — a precision fit with little tolerance for error. The previous supplier machined the OD and ID in separate setups, and the re-chucking error between operations caused concentricity to fluctuate between 0.03mm and 0.08mm. The result was an 8% assembly interference rate, meaning 8 out of every 100 robotic arms required rework before leaving the line.
VMT completed the ID, OD, and end face in a single turn-mill setup, eliminating the cumulative error introduced by re-chucking. Concentricity was consistently held within 0.01mm. First articles underwent full CMM dimensional inspection, with pneumatic gauge sampling of the H7 bore every 30 parts throughout production. Each shipment included a full dimensional inspection report and material MTR.
The first batch of 500 parts went through the assembly line with zero interference fits and 100% H7 bore acceptance. Over 12 months of continuous supply, the line never experienced a single rework incident due to bushing dimensions. The annual order volume grew from 2,000 to 6,000 parts.

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How Does VMT Ensure Quality for Your Custom Machined Bushings?

We back the quality of our CNC machining bushings with international certifications and a rigorous inspection process:

CNC prototype parts full inspection 3D detection

Quality Inspection

Every custom CNC machined bushing is inspected at every stage of production, so dimensional deviations are identified and resolved before they reach your assembly line.

12-Step Quality Control Process: From DFM review and raw material verification through in-process monitoring to final dimensional inspection, every bushing follows a structured quality workflow so dimensional issues are caught at the source, not discovered on your assembly line.
Advanced Inspection Equipment: Our dedicated inspection room is equipped with CMM for full 3D dimensional mapping, optical comparators for profile verification, XRF analyzers for material purity confirmation, and surface roughness testers, giving you traceable data on every critical parameter before shipment.

Certification

Quality Management: VMT holds ISO 9001 and IATF 16949 certification, meaning our manufacturing and inspection processes meet automotive-grade quality system requirements. For your supplier audit, full documentation is available on request.
Full Traceability Documentation: Every shipment includes Material Test Reports, dimensional inspection records, and Certificates of Conformity, giving your engineering and procurement teams complete traceability from raw material to finished bushing.
Industry and Regulatory Compliance: Our processes comply with ISO 13485 for medical applications, ISO 14001 for environmental management, and RoHS and REACH for restricted substance requirements, supporting your compliance needs across industries.

FAQ about CNC Machined Bushings

When should I choose stainless steel over bronze for my bushing?

Choose stainless steel when your application involves moisture, chemicals, food contact, or sanitary requirements. Bronze offers better natural lubricity and load capacity, making it the preferred choice for high load, low speed rotating applications. If corrosion resistance is the primary requirement, 316 stainless is the most common selection.

Can you machine bushings with internal oil grooves or external keyways?

Yes. VMT machines spiral, figure-8, loop, and cross oil groove patterns on inner bores, as well as external keyways, flats, and cross holes using live tooling and 5-axis milling. All oil groove edges are inspected under a 20× microscope to ensure burr free surfaces before shipment.

How does wall thickness affect the dimensional accuracy of a thin wall bushing?

Thin wall bushings are prone to deflection and vibration during machining, which can cause bore distortion and out of roundness. VMT uses full wrap soft jaws and step feeding strategies to maintain workpiece rigidity, achieving distortion free results on wall thicknesses down to 1.0mm.

Can you machine hardened steel bushings after heat treatment?

Yes. VMT uses cylindrical grinding and wire EDM to machine hardened steel bushings after heat treatment, achieving bore tolerances down to ±0.005mm and surface finish to Ra 0.4μm on materials up to HRC 60.

What is the minimum order quantity for custom CNC machined bushings?

There is no minimum order quantity. VMT accepts orders from a single piece, making it practical for prototype validation, spare part replacement, and low volume production runs without requiring you to commit to large batch quantities.

How long does it take to produce a sample bushing from drawing to delivery?

Standard sample lead time is 5 to 7 business days from drawing confirmation, depending on material availability and geometric complexity. Expedited options are available for urgent requirements. Contact us with your drawing for a precise lead time estimate.

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Is High Surface Roughness on Custom Bushings Increasing Friction and Heat Build-Up?

Surface roughness directly impacts bushing performance and service life. At VMT, our custom machined bushings consistently achieve bore finishes of Ra 0.4μm or lower through precision reaming and internal cylindrical grinding processes. A smoother bore surface reduces contact friction between the bushing and shaft during initial run-in, preventing the heat accumulation that leads to seizure under high speed or heavy load conditions. Engineers working on hydraulic cylinders, pneumatic actuators, and high speed spindle assemblies rely on this level of surface control to maintain dimensional stability over extended operating cycles. The result is longer service life, lower maintenance frequency, and stable operation from the very first run.

Concerned about Hidden Burrs Inside the Oil Grooves of Your Custom Bushings?

Hidden burrs inside oil grooves are one of the most common causes of contamination in lubrication and hydraulic systems, and one of the hardest defects to catch without a dedicated inspection process. At VMT, we machine custom machined bushings with double loop, helical, and straight oil grooves using precision tooling. Every part then goes through a combined manual and mechanical deburring process before undergoing magnification inspection to verify that no residual burrs remain inside the groove geometry. For engineers designing high pressure hydraulic circuits or precision lubrication channels, this zero burr standard means clean fluid flow from day one, no contamination risk, and no unplanned downtime caused by blocked lubrication channels.

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Upon receiving your 3D CAD file, our dedicated customer service engineer will thoroughly review your design for manufacturability, ensuring it meets your precise specifications and budget requirements. Contact us today for a free quote!

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Custom CNC Machined Bushings

What kind of Bushings Can We Make?

Custom Flange Bushings

Custom Tapered Bushings

Custom Sleeve Bushings

Custom Stainless Steel Wear Bushings

Custom Threaded Bushings

Custom Adapter Bushings

Custom Split Bushings

Custom Wrist Pin Bushings

Custom Knurled Bushings

Struggling with inconsistent press-fit or shaft clearance in your custom bushings?

Are poor concentricity and roundness causing premature wear on your custom machined bushings?

Precision Bushing Machining Capabilities

Custom Bushing Manufacturing Processes Built for Precision

CNC Turning

Swiss Machining

CNC Milling

Cylindrical Grinding

Boring

Deep Hole Drilling

Reaming

Honing

Wire EDM

Deburring

Not Sure Which Material Is Most Suitable for Your Bushings?

Custom Brass Bushings

Custom Bronze Bushings

Custom Stainless Steel Bushings

Custom Aluminum Bushings

Surface Treatment Options for Custom CNC Machined Bushings

Anodizing(Type II & Type III)

Plating（nickel）

Polishing

Passivation

PVD Coating

Blackened

Nitriding

Phosphating

VMT Machining Case: C932 Bronze Joint Bushings for Collaborative Robotics

How Does VMT Ensure Quality for Your Custom Machined Bushings?

Quality Inspection

Certification

FAQ about CNC Machined Bushings

Related Products

Is High Surface Roughness on Custom Bushings Increasing Friction and Heat Build-Up?

Concerned about Hidden Burrs Inside the Oil Grooves of Your Custom Bushings?

Get Your Project Started Today

Product

Capability

Certificate