Precision Machined Bushes Manufacturer – Bronze, Gunmetal & Brass
Cast and CNC machined bushes in bronze, RG7 gunmetal, C63000 nickel aluminium bronze and brass. Bearing sleeves, flanged bushes and pin bush couplings machined to H7/H8 fits, to your drawings.
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Amarex is a bronze bush manufacturer and exporter from India, producing machined bushes for industrial, marine, hydraulic and automotive applications.
We cast bushes in bronze, RG7 gunmetal and C63000 nickel aluminium bronze – continuous, centrifugal or sand cast – then CNC machine them to standard fits such as H7, H8, K6 and JS9 with controlled surface finish.
Mechanical Bushes by Amarex
Cast & CNC Machined Bushes We Manufacture
From simple bearing sleeves to complex cast-and-machined profiles, every bush is machined as per drawing on CNC turning and milling centres for tight tolerances, controlled surface finish and repeatability across batches.
Each bush is machined to customer 2D/3D drawings, with limits and fits per ISO tolerance standards.
| Bush type | Materials | Typical applications |
|---|---|---|
| Plain bearing bushes / sleeves | Bronze, gunmetal, brass | Machined ID/OD to specified fit |
| Flanged bushes | Bronze, RG7 gunmetal | Flange faced and drilled to drawing |
| Pin bush couplings | Bronze, gunmetal | Coupling bushes for pin-type flexible couplings |
| Gunmetal bushes | RG7 gunmetal | Wear parts for pumps, marine and general engineering |
| Nickel aluminium bronze bushes | C63000 | High-strength, corrosion-critical duties |
| Brass bushes | Free-machining brass | Light-duty spacers and bearing bushes |
| Custom cast & machined profiles | All bronze grades | Complex geometries from cast blanks |
Casting Routes – Continuous, Centrifugal & Sand Cast
We select the casting route to balance cost, durability and machinability for your application and order volume. Continuous cast bar suits high-volume standard bushes; centrifugal casting gives dense, defect-free rings for demanding duties; sand casting handles large or complex one-off profiles.
- Continuous cast – economical, consistent bar stock for standard bush sizes
- Centrifugal cast – dense structure, ideal for high-load and marine bushes
- Sand cast – large diameters and complex flanged or stepped profiles
How We Manufacture Mechanical Bushes
A bush is a wear part, so the process is about getting a sound, dense blank and then machining the running fit into it.
We cast bronze, gunmetal and brass bushes on our sand casting and shell moulding lines, then CNC turn the bore and outside diameter to the fit class your assembly needs.
Bore and OD are held to +/-0.01 mm (10 microns) and gauged with air pressure equipment, which measures a running fit without the contact error a mechanical gauge introduces on a thin-wall bush.
Grade selection
Bronze, RG7 gunmetal, nickel aluminium bronze C63000 or brass against load, speed and media.
Casting
Sand cast or shell moulded blanks, with wall sections set for the finished part.
CNC turning
Bore, outside diameter and flange faces machined to the specified fit.
Detail machining
Grooves, oil holes, drilling and flange facing to drawing.
Finishing
Deburring and any specified surface treatment, which is in our scope.
Inspection
Bore and OD verified on calibrated instruments including air pressure gauges.
Bush & Bearing Manufacturing Process
A bush is a fit, not a dimension. Wall sections are set at the casting stage for the finished part, and bore and outside diameter are verified on calibrated instruments including air pressure gauges.
Bronze, RG7 gunmetal, C63000 or brass chosen against load, speed and media
Blanks sand cast or shell moulded with wall sections set for the finished part
Bore, outside diameter and flange faces CNC turned to the specified fit
Bore and OD verified on calibrated instruments including air pressure gauges
Why Choose Cast & Machined Bronze Bushes
Bushes are cheap to buy and expensive to replace, because replacement means stripping the assembly around them. The specification that matters is the combination of alloy and fit: the right bronze for the load and speed, machined to a bore that holds its clearance once the shaft is running warm.
Running fit machined to +/-0.01 mm (10 microns), verified by air gauging.
Alloy matched to duty - RG7 gunmetal for general wear, C63000 nickel aluminium bronze for high load.
Cast in-house then machined - one supplier controls blank soundness and finished fit.
Flanged, plain, sleeve and coupling bush geometries produced to drawing.
Complex profiles from cast blanks without tooling cost for low and medium volumes.
Material traceability - test certificates with every batch, third-party NABL reports on request.
Industries We Supply Bushes To
Industrial machinery & rotating equipment
cast and machined plain bearing bushes and sleeves
Marine propulsion & deck machinery
cast and machined nickel aluminium bronze bushes (C63000)
Hydraulic systems & cylinders
cast and machined flanged bronze bushes
Automobile & transport
cast and machined suspension and pivot bushes
Pumps, gearboxes & couplings
cast and machined pin bush couplings and RG7 gunmetal bushes
CNC Machining Capabilities for Bushes
- Processes
Continuous/centrifugal/sand casting + CNC turning, milling, finishing
- Fits & tolerances
H7, H8, K6, JS9 and customer-specified interference/clearance fits
- Surface finish
Controlled Ra values per drawing
- Inspection
Micrometers, height gauges, measuring machines, custom ring & pin gauges, air pressure gauges
- Materials
Bronze grades, RG7 gunmetal, C63000 NAB, brass
- Custom work
Made to customer 2D/3D drawings and samples
- Order type
Prototype to production; OEM / custom; export worldwide
Quality Assurance
As an ISO 9001:2015 certified and modern CNC machine shop in India, we uphold global benchmarks while delivering cost-effective precision machining solutions. With RoHS & REACH compliance, we are a trusted machining partner for OEMs worldwide.
Why Amarex for Cast & Machined Bushes
Amarex is an Indian manufacturer and exporter of precision CNC-machined components and castings, with locations in Mumbai and Jamnagar.
Casting and machining in-house lets us pick the right casting route per bush, machine it to exact fits, and document everything from alloy certificate to final inspection report.
- Multiple casting routes (continuous, centrifugal, sand) matched to your application
- Standard fits H7/H8/K6/JS9 held with calibrated ring & pin gauges
- Bronze, gunmetal, NAB and brass under one roof
- ISO 9001:2015 certified quality management, with full documentation per batch
Meet the Expert Behind Mechanical Bushes
Aryan Jain CEO
Frequently Asked Questions
We machine bearing bronzes, RG7 gunmetal and C63000 nickel aluminium bronze, plus brass for light duties – cast by continuous, centrifugal or sand casting and machined to drawing.
Yes. We routinely work to H7, H8, K6 and JS9 limits and fits, verified with calibrated ring and pin gauges and documented in dimensional inspection reports.
Yes. We machine pin bush coupling components in bronze and gunmetal to customer drawings for pin-type flexible couplings.
By load, size and volume: continuous cast for standard high-volume bushes, centrifugal for dense high-load rings, sand cast for large or complex profiles. We advise the best route at quotation.
Yes. Surface roughness is controlled to the specified Ra values to ensure proper wear characteristics and lubrication behaviour, with verification reports when required.
Yes. Every batch ships with material certificates and dimensional inspection reports for full traceability.
Get a quote for your machined bushes
Send us your bush drawings with fits and material grade and our engineering team will respond with casting route, tolerances and pricing.