Bronze Sleeve
Bushings
CNCPioneer manufactures precision bronze sleeve bushings for OEM machinery, hydraulic equipment, construction, agriculture, marine and industrial applications. We machine C93200, C95400, C86300, C54400, SAE 841 and custom bronze alloys with controlled ID/OD fit, lubrication features, alloy verification and documented inspection.
What Are Bronze
Sleeve Bushings?
Bronze sleeve bushings are plain bearing sleeves that support rotating, oscillating or sliding shafts. Their service life depends on the right alloy, installed clearance, bore finish, lubrication path and housing fit.
CNCPioneer reviews shaft size, housing bore, load, speed and lubrication before machining, then controls ID, OD, wall thickness, grooves, flange faces and inspection from drawing to shipment.
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Installed clearance control ID, OD, wall thickness, roundness and concentricity are checked against the drawing and expected housing fit, reducing the risk of seizure or loose running after press-fit.
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Bronze alloy selection C93200, C95400, C86300, C54400, SAE 841 and custom grades are matched to load, speed, lubrication, shaft material, corrosion exposure and cost target.
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Lubrication feature machining Straight, spiral, annular and figure-eight grooves, oil holes, grease pockets and graphite plug patterns are machined to support real lubricant flow.
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Fast quote and DFM Send a drawing, STEP file, sample dimensions, shaft and housing data, or annual demand. Most projects receive pricing within 24 hours and DFM feedback within 48 hours.
Why CNCPioneer for
Bronze Sleeve Bushings?
Choose CNCPioneer when your bushing needs bearing-level control, not just tube turning. We combine verified bronze alloys, controlled press-fit clearance, functional lubrication features and inspection records for repeat OEM supply.
Verified Bronze Alloy Per Lot
Wrong alloy can pass dimensional inspection and still fail early. CNCPioneer verifies incoming bronze by SII XRF and confirms the grade against the drawing, including C93200 SAE 660, C95400, C95500, C86300, C54400, C51000, SAE 841 and customer-specified grades.
ID/OD Control for Press-Fit Assemblies
Pressing a sleeve into the housing can reduce the bore and change running clearance. Our DFM reviews shaft diameter, housing bore, wall thickness and OD interference before machining. For precision programs, ID/OD concentricity to ±0.010mm and H7/H8 bore options are available.
Functional Oil Grooves and Graphite Plug Patterns
Lubrication features are designed around movement type, load direction and service interval. Spiral, annular, straight, figure-eight grooves, cross holes and graphite plug arrays are machined with controlled depth, burr-free edges and final bore sizing.
China Manufacturing Cost with Bearing Control
CNCPioneer combines China bronze bushing manufacturing economics with repeatable inspection. Bore size, OD fit, flange faces, chamfers, grooves and plug patterns are controlled as bearing-critical features, supporting cost reduction without losing traceability.
Prototype to Volume Production
Short-run replacement bushings, prototype sleeves, medium-volume OEM parts and high-volume custom bushings are supported. Small thin-wall sleeves run on Swiss CNC equipment; larger flanged, grooved or graphite plugged bushings run on MAZAK mill-turn centers and CNC turning cells.
24-Hour Quote + 48-Hour Bearing DFM
Quotes include a practical review of material, fit, clearance, lubrication, groove style, flange requirement, tolerance level, quantity and documentation needs. Missing clearance, material or oil groove details are flagged before production.
Bronze Sleeve Bushings
Product Portfolio
From simple plain sleeves to flanged, oil-grooved, graphite plugged and heavy-duty bearing bushings, CNCPioneer machines custom bronze components from drawings, CAD models, samples or shaft and housing dimensions.
Plain Bronze Sleeve Bushings
Cylindrical bronze sleeves for shafts, pins, pivots, rollers, pumps, gearboxes and industrial machinery. C93200 SAE 660 is common for oil-lubricated service; custom ID, OD, length, chamfers and lubrication holes are machined in inch or metric sizes.
Flanged Bronze Sleeve Bushings
Flanged bushings combine radial support with an integrated thrust face. CNCPioneer controls flange OD, thickness, flatness, bore-to-flange perpendicularity and under-flange transitions, with optional thrust-face grooves, oil holes and graphite plug patterns.
Oil Groove Bronze Sleeve Bushings
Spiral, annular, straight and figure-eight grooves distribute oil or grease across the bearing surface. Groove depth, width, feed-hole position and edge break are inspected to protect the shaft and keep lubricant in the loaded zone.
Graphite Plugged Bronze Bushings
Graphite plugged designs support slow-speed, high-load or maintenance-limited applications. C95400 and C86300 are common base alloys. Plug spacing, interference, flushness and final bore size are controlled after plugging.
SAE 841 Oil-Impregnated Bronze Sleeves
Oil-impregnated bronze stores lubricant in its porous structure and is suitable for low-maintenance, light-to-medium load and moderate-speed applications. Standard and custom dimensions, flanges and sizing operations are supported.
Heavy-Duty Bronze Bearing Bushings
C95400, C95500 and C86300 bushings are used for construction equipment, agriculture, mining, hydraulic cylinders, presses, material handling and marine hardware. Thick-wall sleeves, large OD bushings, flanges, grooves and replacement parts are available.
Industries & Applications
CNCPioneer supplies bronze sleeve bushings for equipment that needs durable shaft support, controlled lubrication, shock-load resistance, corrosion resistance or reliable replacement parts.
Mining
Heavy-duty bushings for excavator pivots, loader linkages, crusher equipment, drilling rigs, bucket pins and hydraulic cylinder eyes. C95400, C86300, grease-grooved and graphite plugged designs support shock load and contaminated environments.
Agriculture
Bronze bushings for tractors, harvesters, planters, balers, steering pivots and implement hinges. Material and groove design are matched to dust, seasonal maintenance, shock load and imperfect lubrication.
Semiconductor
Precision bushings for hydraulic cylinder pivots, pump shafts, valve actuators, rotary unions and gear pumps. Controlled clearance, bore finish and oil groove placement help maintain stable shaft support near seals and fluid interfaces.
Robotics
Custom bronze sleeves for gearboxes, presses, conveyors, packaging machines, textile machinery, motors, pumps, fixtures and maintenance replacement assemblies. Repeat production records preserve alloy, tolerance and groove requirements.
Marine
Aluminum bronze and tin bronze bushings for marine hinges, deck equipment, pumps, steering gear, winches, valves and offshore machinery. CNCPioneer reviews corrosion exposure, shaft material, lubricant and galvanic compatibility before production.
Automotive
Bronze bushings for suspension pivots, actuator shafts, rail door mechanisms, energy storage cabinets, wind equipment, motors and generators. PPAP, Cpk studies, traceability and bar-coded packaging are available for qualified programs.
Materials
Materials for Bronze
Sleeve Bushings
Material selection is matched to load, speed, lubrication, shaft hardness, corrosion exposure, shock load, service interval and cost target.
C93200 SAE 660 Bearing Bronze
The standard choice for general oil-lubricated sleeve bushings. Best for moderate load and speed where conformability, embeddability and machinability matter. Available as plain, flanged, grooved and custom CNC machined sleeves.
C95400 / C95500 Aluminum Bronze
Selected for higher strength, heavy equipment, marine machinery, hydraulic pivots and high-load shafts. Machining strategy, groove deburring and final bore inspection are adjusted for aluminum bronze's higher strength.
C86300 Manganese Bronze
Used for high-load, slow-speed and shock-load pivots in construction, agriculture, mining and heavy industrial equipment. Proper shaft hardness, lubrication and clearance planning are important for long service life.
C54400 / C51000 Phosphor Bronze
Used for thin-wall bushings, wear sleeves, electrical-mechanical parts and precision sleeves where fatigue resistance and burr control matter. Swiss CNC machining supports miniature and thin-wall components.
SAE 841 Oil-Impregnated Bronze
Recommended for low-maintenance, light-to-medium load applications such as motors, fans, appliances, instruments, pumps and actuators. The porous oil path is protected during sizing, cleaning and packaging.
Graphite Plugged C95400 / C86300 Bronze
Combines a high-strength bronze base with solid lubricant plugs for dirty, intermittent or hard-to-grease applications. Plug position, flushness and bore sizing are inspected after plugging.
Finishing, Lubrication
& Packaging Options
Bronze bushings usually depend more on bore finish, groove quality and clean deburring than decorative coating. CNCPioneer plans each finish around the shaft, housing fit, lubricant, service environment and assembly method.
Precision Bore Finish + Oil Grooves
Bores are finished to drawing requirement, commonly Ra 0.4–0.8µm for oil-lubricated sleeves. Groove geometry is selected for rotation, oscillation, load direction and lubricant feed.
Graphite Plugging
Plug holes are machined, filled and checked for flushness and retention. The bore is sized after plugging so the finished bearing surface remains controlled.
Oil Impregnation
SAE 841 porous bronze stores and releases lubricant during use. Sizing, cleaning and packaging protect the porous oil path from blockage.
Selective Coating Options
Nickel, tin, dry-film lubricant and anti-tarnish protection are available when specified. Coating location is reviewed so the bore, groove and press-fit OD remain functional.
Deburring and Chamfering
Oil grooves, grease holes, flange edges and bore chamfers are deburred without rounding away designed bearing surface, groove volume or press-fit edges.
Cleaning and Packaging
Parts are cleaned, protected and packed for overseas shipment or line-side storage. Options include protective oil, VCI bags, compartment packaging, labels and matched replacement kits.
Bore finish, oil groove geometry, graphite plug pattern, coating, deburring, cleaning and packaging are reviewed during the 48-hour DFM process.
IATF 16949 & AS9100D Quality System for
Bronze Sleeve Bushings
Our quality process focuses on four bearing-critical risks: alloy identity, installed clearance, lubrication feature accuracy and inspection documentation.
Alloy Verification + Bearing DFM
Incoming bronze lots are verified by SII XRF when required. DFM reviews material, shaft diameter, housing bore, press-fit allowance, clearance, wall thickness, flange, oil groove, graphite plug pattern and service environment.
- SII XRF verification for common and custom bronze grades
- Shaft, housing, load, speed and lubrication reviewed before production
- Clearance, wall thickness and groove risks flagged early
Precision Machining and Datum Control
Swiss CNC, CNC turning, boring, reaming, honing and MAZAK mill-turn machining are selected by size and feature complexity. Datum strategy keeps bore, OD, flange face and groove location aligned.
- ID/OD concentricity to ±0.010mm for precision programs
- H7/H8 bore and h7/h8 OD options when required
- Ra 0.4–0.8µm bore finish available for bearing surfaces
100% Bore Gauge + Feature Inspection
ID, OD, length, flange thickness, wall thickness, chamfers, oil grooves, oil holes, graphite plug position and surface finish are inspected according to drawing and control plan.
- 100% bore gauge inspection for bearing-critical IDs
- Oil groove depth, width, hole alignment and burr control checked
- Graphite plug position, flushness and retention inspected
Documentation and Traceability
Dimensional reports, material certificates, SII XRF reports, roughness records, coating reports, RoHS/REACH documentation, COC, PPAP Level 3 and AS9102 FAIR are available for qualified programs.
- Material batch, machining batch and inspection records maintained
- PPAP Level 3 support for automotive and equipment OEM programs
- AS9102 FAIR support for aerospace and precision equipment programs
Bronze Sleeve Bushings FAQ
Quick answers for buyers, engineers and maintenance teams comparing custom bronze sleeve bushing suppliers.
A 2D drawing or STEP file is best. If no drawing is available, send shaft diameter, housing bore, bushing length, flange dimensions, load, speed, motion type, lubrication method, environment and annual quantity. For replacement bushings, photos and worn-sample measurements are helpful, but shaft and housing measurements are still important.
C93200 SAE 660 is the common choice for general oil-lubricated service. C95400/C95500 fits higher load and marine exposure. C86300 supports slow-speed shock-load pivots. C54400/C51000 works for thin-wall and wear applications. SAE 841 is used for low-maintenance, light-to-medium load self-lubricating sleeves.
OD interference can reduce the ID after installation, especially on thin-wall bushings. CNCPioneer reviews shaft diameter, housing bore, wall thickness, OD interference and final clearance before production. Finish sizing after installation may be recommended for precision assemblies.
Simple prototype or urgent replacement bushings often take 3–7 business days after confirmation. Flanged, grooved or larger bushings commonly take 5–10 business days. Graphite plugged, heavy-duty, large OD or special-inspection programs may take 10–20 business days.
Get a Bronze Bushing Quote
Upload your drawing, STEP file, shaft and housing dimensions, worn-sample measurements, alloy requirement, lubrication method or annual usage. CNCPioneer returns pricing within 24 hours and DFM feedback within 48 hours for most custom bronze sleeve bushing inquiries.