metric bronze flange bearing
metric bronze flange bearing
Metric Bronze Flanged Bearings: Self-Lubricating Solutions for Reliable Industrial Performance
Introduction to Metric Bronze Flanged Bearings
Metric bronze flanged bearings (also called metric bronze flange bushings or flanged sleeves) are self-lubricating plain bearings with a protruding flange for axial location and thrust support. Available in sintered (oil-impregnated SAE 841) or cast bronze with graphite plugs, they handle radial and light axial loads in low-to-medium speed applications without external lubrication.
At Bearingface.com, we focus on high-quality graphite-plugged metric bronze flanged bearings for true maintenance-free operation in tough environments.
Key Benefits of Metric Bronze Flanged Bearings
- Oil-Free & Low Maintenance — Graphite plugs or oil impregnation eliminate routine greasing and reduce failure from lubricant starvation.
- Flange Design Advantage — Built-in thrust surface simplifies assembly, prevents axial movement, and handles combined loads.
- High Load & Wear Resistance — Bronze base supports heavy static/dynamic loads; graphite prevents galling in dirty or intermittent conditions.
- Cost & Design Efficiency — No need for oil grooves, reservoirs, or complex seals—saves manufacturing time and operating costs.
- Corrosion & Contamination Tolerance — Performs well in dusty, wet, or mildly corrosive settings compared to rolling-element bearings.
- Quiet & Smooth Operation — Low friction coefficient (0.04–0.12 for graphite types) reduces noise in precision equipment.
Material Comparison for Metric Bronze Flanged Bearings
| Material Type | Base Alloy | Lubrication Method | Max PV Value (approx.) | Max Temp (°C) | Friction Coef. | Ideal Applications | Drawbacks |
|---|---|---|---|---|---|---|---|
| Graphite-Plugged Cast Bronze | C86300 / CuZn25Al6Fe3Mn3 | Embedded graphite plugs | Very High (100–150+) | Up to 400+ | 0.04–0.12 | High-load, low-speed, dirty/harsh env. | Slightly higher friction than PTFE |
| Sintered Oil-Impregnated (SAE 841) | Porous bronze (Cu-Sn) | Oil reservoir | Medium (50–80) | Up to 150–200 | 0.08–0.15 | Moderate loads, continuous rotation | Needs re-oiling over time; less dirt-tolerant |
| Cast Bronze (Non-Lubed) | C93200 / SAE 660 | External grease/oil | High | Up to 250 | 0.10–0.20 | General-purpose with lube system | Requires regular lubrication |
| PTFE-Composite Alternatives | Steel-backed PTFE | Sliding layer | High (low-speed) | Up to 280 | ~0.03 | Clean, higher-speed needs | Lower impact resistance; layer wear |
Best Choice: Graphite-plugged versions for high-load, maintenance-free priority in industrial use.
Standard Metric Bronze Flanged Bearing Size Examples
Common graphite-plugged or sintered metric sizes (select based on shaft fit, load, and speed; tolerances often H7/H8 bore after press-fit):
Refer to manufacturer catalogs (e.g., Bunting SAE 841 metric flanged or plug-graphite series) for exact tolerances, G7 fits, and stock availability.
Typical Applications in Industrial Equipment
Metric bronze flanged bearings excel where alignment, axial retention, and low maintenance matter:
- Automation & Robotics — Linear guides, pivot points, and end-effector joints in pick-and-place systems.
- Packaging & Food Machinery — Conveyor rollers, film feeders, and sealing mechanisms (no oil contamination).
- Printing & Textile Equipment — Roller supports, tension arms, and reciprocating parts.
- Machine Tools & CNC — Spindle supports, slide ways, and low-speed indexing (especially graphite types for dust resistance).
- Material Handling — Chain drives, winches, and mixer pivots in moderate-to-high load setups.
The flange simplifies mounting in housings while providing thrust capability.
FAQ: Metric Bronze Flanged Bearings
Q: What’s the main difference between sintered SAE 841 and graphite-plugged metric flanged bearings? A: Sintered types rely on oil impregnation for moderate use; graphite-plugged offer superior high-load, high-temp, and dirty-environment performance with true oil-free lubrication.
Q: Can they handle axial loads? A: Yes—the flange provides built-in thrust surface, typically supporting 20–30% of radial load capacity axially.
Q: How to choose press-fit tolerances? A: Use H7/H8 for bore after installation; consult PV calculations for load/speed limits to avoid overheating.
Q: Are they suitable for high-dust environments? A: Graphite-plugged versions excel here—solid lubricant tolerates contaminants better than oil systems.
Q: Need custom sizes? A: Yes—many suppliers offer metric customs with special flanges, grooves, or alloys.
Upgrade your equipment with reliable metric bronze flanged bearings from Bearingface.com. Contact us for detailed catalogs, custom graphite-plugged options, samples, or application-specific recommendations.
