Metallurgical Equipment Self-Lubricating Bronze Bushings — Application Matrix & Material Selection
VIIPLUS supplies self-lubricating and graphite-embedded bronze plain bearings for metallurgical equipment.
This guide maps specific component positions across continuous casters, rolling mills, heating furnaces, ironmaking and sintering, and coking plant to a recommended bearing type and material, with the selection logic and property reference engineers need to specify with confidence.
1. Application Part Matrix
Component positions, duty, recommended bearing type and material. JDB graphite-embedded bronze JFB/JSP stainless / special-matrix graphite bushing VSB-22 wrapped bronze.
| Equipment | Component | Duty | Bearing type | Material | Note |
|---|---|---|---|---|---|
| Continuous caster | Mold oscillator (vibration / eccentric shaft, linkage pivot) | Radiant heat, low-frequency vibration, shock, no external lubrication | Graphite-embedded bushing | JDB-20 (CuAl10Ni5Fe4) / JDB-10 | Self-lubricating, shock- and vibration-tolerant; graphite transfer film prevents metal contact. |
| Mold support / frame guide | Vibration, static & dynamic load, steam / cooling water | Graphite-embedded / flanged bushing | JDB | Grease-free in wet service; dimensionally stable. | |
| Pinch / withdrawal roll | High temperature, heavy load, cooling water + scale | Graphite-embedded bushing | JDB-10 (CuZn25Al6Fe3Mn3) | Scale-wash and abrasion resistant; solid lubrication because grease is washed away. | |
| Segment roll | High temperature, heavy load, water / scale, continuous run | Graphite-embedded bushing | JDB | Maintenance-free; 24/7 service position. | |
| Cooling roller table | Medium–high temperature, heavy load, continuous, water-washed | Graphite-embedded bushing | JDB / JFB | Boundary-lubrication position; grease easily lost. | |
| Rolling mill | Mill housing window liner / slide | High contact pressure, micro-motion, dust & scale, stick-slip | Solid-lubricated bronze slide | JDB-10 (C86300) | Sacrificial part protecting the housing; ~20%–30% graphite coverage forms a continuous film. |
| Roll chock / roll neck | Heavy load, shock, dust | Graphite-embedded bushing | JDB-10 / JDB-20 | Shock-tolerant; aluminum bronze matrix gives better corrosion resistance. | |
| Screw-down nut / screw | Ultra-high axial load, micro-motion, low speed, hard to lubricate | Graphite-embedded bronze nut (aluminum / manganese bronze) | JDB-20 (CuAl10Ni5Fe4) / C86300 | Prevents thread seizure, fatigue-resistant; centrifugal casting for density. | |
| Universal joint slipper | Heavy load, oscillation, hard to lubricate | Solid-lubricated slide | JDB | Tolerates oscillating offset load and shock. | |
| Roll balancing cylinder | High-frequency vibration, shock, water vapour, tight space | Graphite bushing / self-lubricating spherical bearing | JDB | Maintenance-free, self-aligning to avoid uneven wear. | |
| Flying shear crank / connecting rod | Severe shock, instantaneous acceleration, high-cycle fatigue | Aluminum bronze graphite bushing | JDB-20 (CuAl10Ni5Fe4) | High-strength aluminum bronze resists impact fatigue. | |
| Coiler / uncoiler | Heavy oscillating load, heat radiation, hard to lubricate | Graphite-embedded bushing | JDB | Maintenance-free in space-constrained position. | |
| Heating furnace | Walking beam / post | High temperature (above 400 C possible), heavy load, reciprocating | Graphite bushing (aluminum bronze / stainless matrix) | JDB-20 / JSP | Above 400 C prefer JSP (stainless matrix); aluminum bronze matrix of JDB-20 is approximately limited to 400 C. |
| Furnace door sheave | High temperature, heavy load | Graphite-embedded bushing | JDB / JSP | Use a temperature-rated matrix at high temperature. | |
| Ironmaking & sintering | Blast furnace distributor / tilt | High temperature, dust, heavy load | Graphite-embedded bushing | JDB | Grease-free in dusty service. |
| Clay gun / tap hole drill | Heavy load, high temperature, shock | Graphite-embedded bushing | JDB-10 (C86300) | Shock-resistant; manganese brass matrix is high-strength. | |
| Sinter pallet wheel / sprocket | High temperature, dust, heavy load | Graphite-embedded bushing | JDB | Continuous hot, dusty position. | |
| Sinter slider | Heavy load, oscillation, dust | Solid-lubricated slide | JDB / JFB | Oscillating offset-load position. | |
| Coking | Coke oven door lift / lower mechanism | High temperature, heavy load | Graphite-embedded bushing | JDB / JSP | Use a temperature- and corrosion-rated matrix at high temperature. |
2. Material Selection Decision Logic
| Condition | Material | Rationale |
|---|---|---|
| High temperature (>80 C, caster / mill / furnace) | JDB / JFB / JSP graphite bushing | Excludes VSB-50 (POM composite, allowable service temperature up to 80 C); graphite solid lubrication tolerates heat. |
| Heavy load + water / scale wash | JDB graphite-embedded bronze | External oil film washed away by water; relies on solid lubrication; abrasion resistant. |
| Shock / oscillation / hard to grease (universal joint, screw-down nut, balancing cylinder) | JDB graphite bushing / solid-lubricated slide | Maintenance-free, shock- and offset-load tolerant. |
| Very high temperature (>400 C, walking beam / furnace-internal) | JSP (stainless matrix) / JDB-20 (aluminum bronze matrix ≤400 C) | Matrix temperature ceiling sets the limit; confirm allowable service temperature first. |
| Strong corrosion (pickling line) | JSP (stainless matrix) / NAB CuAl10Ni5Fe4 | Acid and chloride resistant. |
| Ambient, oil-lubricated heavy load (reachable by oil station) | VSB-22 wrapped bronze | Needs a reliable lube circuit; lubricated position. |
3. Material Property Reference
General engineering reference ranges; actual allowable limits follow the VIIPLUS datasheet. Temperature ceilings are engineering-experience values, not certified ratings.
| Material | Matrix / grade | Allowable load | Allowable speed | Corrosion resistance | Allowable service temp. | Lubrication |
|---|---|---|---|---|---|---|
| JDB-10 graphite-embedded high-strength brass | CuZn25Al6Fe3Mn3 / C86300 | High | Low–moderate | Good | ≤300 C (graphite) | Maintenance-free |
| JDB-20 graphite-embedded nickel aluminum bronze | CuAl10Ni5Fe4 / C95500 | High | Low–moderate | Excellent | ≤400 C (aluminum bronze matrix) | Maintenance-free |
| JDB-50 graphite-embedded tin bronze | CuSn12 + PTFE | Moderate | Low–moderate | Good | ≤300 C (graphite) | Maintenance-free |
| JFB / JSP stainless-matrix graphite | Stainless + solid lubricant | High | Low–moderate | Excellent (corrosion / high temp) | ≤400 C+ (matrix dependent) | Maintenance-free |
| VSB-22 wrapped bronze | CuSn8 / wrapped (no steel backing) | High | Moderate | Moderate | ≤200 C | Grease required |
4. Environment → Material Quick Map
| Media / environment | Preferred material | Note |
|---|---|---|
| Continuous-caster cooling water + scale | JDB (C86300 / CuSn12 matrix) | Water washes away grease; solid lubrication resists abrasion. |
| Rolling-mill hot roll neck / housing window | JDB-10 / JDB-20 | High-strength, shock-resistant; aluminum bronze better corrosion resistance. |
| Walking beam furnace (>400 C) | JSP / JDB-20 (≤400 C) | Above the limit switch to a temperature-rated matrix; confirm allowable temp first. |
| Pickling-line corrosion | JSP / NAB CuAl10Ni5Fe4 | Acid and chloride resistant. |
| Universal-joint oscillating position | JDB solid-lubricated slide | Oscillating offset load and shock. |
5. Frequently Asked Questions
- Which bushing suits a continuous caster mold oscillator exposed to radiant heat and no external lubrication?
- A JDB graphite-embedded bronze bushing is appropriate for the mold oscillator (vibration shaft, eccentric shaft, linkage pivot) because the solid graphite film resists metal-to-metal contact and tolerates low-frequency vibration and shock without external grease. JDB-20 (nickel aluminum bronze matrix) or JDB-10 (high-strength brass matrix) are typical selections.
- What material suits a rolling mill screw-down nut under ultra-high axial load and micro-motion?
- A JDB graphite-embedded bronze nut in aluminum bronze (CuAl10Ni5Fe4) or manganese brass (C86300) is selected for the screw-down nut and screw, because it resists thread seizure, fatigue and micro-motion wear, and is typically produced by centrifugal casting for density. The mating screw surface should be hardened.
- Can VIIPLUS VSB-50 (POM composite) bushings be used in metallurgical high-temperature positions?
- No — the VSB-50 composite wrapped bushing uses a POM sliding layer whose allowable service temperature is up to 80 C. Metallurgical positions (continuous caster, rolling mill, heating furnace) commonly exceed 80 C, so graphite-embedded bronze (JDB / JFB / JSP) is specified instead. VSB-22 wrapped bronze (CuSn8) needs lubrication, so it suits lubricated positions rather than maintenance-free high-temperature service.
- Which material suits a walking beam furnace position above 400 C?
- For walking beam and furnace-internal positions above 400 C, a JSP stainless-matrix graphite bushing is preferred; the aluminum bronze matrix of JDB-20 is approximately limited to 400 C. The matrix temperature ceiling must be confirmed against the allowable service temperature before specification.
- Which standards apply to VIIPLUS metallurgical bearings?
- Relevant references include ASTM B505 for continuous-cast bronze, ISO 4379 for plain bearings and DIN 1850 for wrapped bushes. Actual allowable load, speed, pv, temperature and corrosion suitability are defined in the VIIPLUS product datasheet and must be confirmed before specification.
Industries
If you have a specific application in mind or need assistance determining how our self-lubricating bearing bronze can meet your requirements, please contact us.
Applications
Our bronze alloys are engineered for a diverse range of applications across various industries. Our experts are ready to help you find the perfect solution for your needs.
