Bunting Bearings
Bunting Bearings is a long-established American manufacturer of plain (sleeve) bearings offering one of the broadest maintenance-free and low-maintenance bearing ranges on the market. Its core competence is powdered-metal (sintered) technology — most notably oil-impregnated sintered bronze marketed under the Bost-Bronz name — supplemented by a deep solid cast-bronze programme and self-lubricating nylon liner bearings (Nyliner).
The powdered-metal ranges are inherently self-lubricating: the porous sintered structure is vacuum-impregnated with lubricating oil that is drawn to the running surface under load and motion, giving maintenance-free operation directly comparable to Bushingo's Metafram sintered families. The cast-bronze ranges cover higher loads, shock duty and larger diameters, and are typically grease-lubricated or supplied with solid-lubricant provisions. Standard forms across the range include cylindrical (sleeve) bushes, flanged bushes, thrust washers, and machinable bar/tube stock.
For RFQ purposes, Bunting is a natural cross-reference point for buyers specifying SAE 841, SAE 863 and SAE 660 (C93200) bearings. Bushingo can quote functionally equivalent maintenance-free Metafram bearings — BP25 oil-impregnated sintered bronze, FP20 sintered iron, SO16 sintered alloy and Metagliss self-lubricating plates — against Bunting sleeve, flange and thrust part families. Exact dimensions, tolerances and load/PV ratings should be confirmed per part at quotation.
Bunting Bost-Bronz Powdered Metal (SAE 841)
| Material | Oil-impregnated sintered (powdered-metal) bronze, SAE 841 (nominally ~90/10 copper-tin), vacuum-impregnated with lubricating oil for self-lubricating, maintenance-free running. |
|---|---|
| Forms | Cylindrical (sleeve) bush, Flanged bush, Thrust washer, Machined-to-print special |
| Typical size range | General knowledge, not a fixed spec: commonly from a few millimetres bore up to roughly 75 mm, in inch and metric equivalents; larger sizes by special order. Confirm exact dimensions and tolerance per part on RFQ. |
Key features
- Self-lubricating and maintenance-free — porous structure acts as an internal oil reservoir
- Oil drawn to the interface under motion and load, then re-absorbed at rest
- Quiet, clean running with no external greasing required
- Well suited to low-to-moderate speed rotary, oscillating and linear motion
- Cost-effective in volume and available in a very wide standard size table
Applications
- Fractional-horsepower electric motors
- Pumps and small gear drives
- Household and office appliances
- Power tools
- Automotive ancillaries and general machinery
Cross-reference
Direct functional equivalent of Bushingo BP25 (oil-impregnated sintered bronze). Same self-lubricating principle and impregnation-oil concept; BP25 sleeve, flange and thrust forms quote one-for-one against Bost-Bronz / SAE 841 part families. Closer to BP25 than any competitor grade.
Request a quote for Bunting Bost-Bronz Powdered Metal (SAE 841) ↗
Bunting SAE 863 Powdered Metal (Iron / Iron-Copper)
| Material | Oil-impregnated sintered iron-copper powdered metal (iron-based grades such as SAE 863), self-lubricating like the bronze grades but with higher iron content for load capacity and lower cost. |
|---|---|
| Forms | Cylindrical (sleeve) bush, Flanged bush, Thrust washer |
| Typical size range | General knowledge: similar sintered-bushing range to the SAE 841 bronze grades — small millimetre bores up to the tens of millimetres, inch and metric. Confirm per part on RFQ. |
Key features
- Higher load capacity than sintered bronze at lower material cost
- Oil-impregnated, self-lubricating and maintenance-free
- Good wear resistance under heavier radial loads at moderate speed
- Economical choice for high-volume mechanisms
Applications
- Automotive and agricultural equipment
- Appliances and white goods
- Fractional-horsepower drives
- General industrial machinery
Cross-reference
Closest to Bushingo FP20 (sintered iron) — the direct maintenance-free counterpart for economical iron-based sintered bushings. Where higher-performance sintered alloy is required, Bushingo SO16 is the step-up equivalent.
Request a quote for Bunting SAE 863 Powdered Metal (Iron / Iron-Copper) ↗
Bunting SAE 660 Cast Bronze (C93200)
| Material | Solid continuous-cast / centrifugal-cast leaded tin bronze, C93200 (SAE 660), plus related cast bronze alloys; a solid-metal (not sintered) bearing material. |
|---|---|
| Forms | Sleeve bush, Flanged bush, Thrust washer, Cored bar, Tube / machined-to-print special, Grease-grooved bush |
| Typical size range | General knowledge: from small sleeves to large diameters well beyond 100 mm; also supplied as cored bar and tube for on-site machining. Confirm exact size per part on RFQ. |
Key features
- High static, dynamic and shock load capacity
- Wide operating temperature range and good corrosion resistance
- Tolerant of dirty/contaminated environments when grease-flushed via grooves
- Readily machined to tight tolerance and fine surface finish
- Best suited to slow, heavily loaded rotary or oscillating motion
Applications
- Construction and earth-moving equipment
- Machine tools and presses
- Pumps, valves and marine gear
- Heavy off-highway pivots and linkages
- Structural pivot pins and MRO replacement
Cross-reference
Sits outside the sintered maintenance-free range — cast bronze is not self-lubricating unless solid-lubricant plugged. For a cleaner, maintenance-free substitute in lighter/moderate duty, Bushingo BP25 or SO16 sintered bearings (or Metagliss plates) apply; heavily loaded grease-lubricated cast-bronze duties are matched by Bushingo's solid cast-bronze bushing offer rather than the Metafram sintered lines.
Bunting CJ Bearings
| Material | Standardised cast bronze bearing series (leaded tin bronze family), supplied as ready-to-fit, off-the-shelf sleeve bearings in common dimensions. |
|---|---|
| Forms | Standardised sleeve bush, Flanged bush |
| Typical size range | General knowledge: held to common small-to-medium inch/metric sleeve dimensions for interchangeability; treat as indicative and confirm exact size per part on RFQ. |
Key features
- Off-the-shelf, standardised cast-bronze bushings for fast availability
- High load capacity with good machinability and surface finish
- Grease-lubricated running with long service life
- Broad interchangeability with common cast-bronze sleeve dimensions
Applications
- General machinery and equipment builds
- Pivots, linkages and levers
- Agricultural and material-handling equipment
- MRO replacement of worn bronze bushes
Cross-reference
A stocked cast-bronze load-carrying series. For a maintenance-free alternative, Bushingo BP25 (sintered bronze) covers lighter self-lubricating duty and SO16 the higher-load sintered option; where grease-lubricated bronze must be retained, quote against Bushingo's cast-bronze equivalents.
Bunting Nyliner Nylon Liner Bearings
| Material | Self-lubricating nylon (polyamide) liner bearings and nylon bushings — a dry-running, non-metallic bearing material. |
|---|---|
| Forms | Snap-in flanged liner, Plain sleeve liner / bush |
| Typical size range | General knowledge: small-to-medium bores typical of nylon liner bearings; confirm per part on RFQ. |
Key features
- Self-lubricating and maintenance-free with no external lubricant
- Quiet, vibration-damping and non-marring on the shaft
- Corrosion-resistant and tolerant of moisture and light contamination
- Light weight and low cost; eliminates metal-to-metal contact
Applications
- Light rotary and linear motion
- Appliances and office equipment
- Seating, hinges and adjustment mechanisms
- Automotive interior and light agricultural duty
Cross-reference
The closest non-metallic maintenance-free counterpart to Bushingo Metagliss (self-lubricating composite friction plates/bushes). Where a low-friction, dry-running polymer solution is preferred to a metal bearing, Metagliss is the Bushingo equivalent; for metal self-lubrication in the same envelope, BP25 sintered bronze applies.
Bunting Thrust Washers (multi-material)
| Material | Thrust washers offered across the full range — oil-impregnated sintered bronze (SAE 841), sintered iron (SAE 863), solid cast bronze (SAE 660/C93200) and self-lubricating nylon. |
|---|---|
| Forms | Flat thrust washer, Grease-grooved thrust washer |
| Typical size range | General knowledge: wide outer-diameter range across the material grades; confirm per part on RFQ. |
Key features
- Carries and locates axial (thrust) loads and controls end-float
- Material-matched to the companion sleeve bearing
- Self-lubricating in sintered and nylon grades; grease-lubricated/grooved in cast bronze
- Available across the same material families as the sleeve range
Applications
- Gearboxes and transmissions
- Pumps and motors
- Any assembly needing axial location alongside a sleeve bush
- General power-transmission equipment
Cross-reference
Sintered and nylon thrust washers correspond to Bushingo BP25/FP20 thrust forms and Metagliss self-lubricating thrust plates; cast-bronze thrust washers to Bushingo's cast-bronze thrust range. Pair the thrust form with the matching Bushingo sleeve family on the RFQ.
Request a quote for Bunting Thrust Washers (multi-material) ↗
Match a part or specify your duty
Send a competitor part number or your load, speed, temperature and shaft size — we quote the right maintenance-free bearing.
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