ROTOMETALS BABBITT ALLOY HANDBOOK: A QUICK ANALYSIS OF EVERY GRADE WE PRODUCE

ROTOMETALS PRODUCES A FULL RANGE OF ASTM‑SPECIFIED BABBITT BEARING ALLOYS, EACH ENGINEERED FOR SPECIFIC LOAD, SPEED, AND SERVICE CONDITIONS. THESE ALLOYS ARE USED IN INDUSTRIAL MACHINERY, MOTORS, COMPRESSORS, SHAFT BEARINGS, AND RESTORATION WORK WHERE PROVEN WHITE METAL PERFORMANCE IS REQUIRED. EVERY ROTOMETALS BABBITT IS MANUFACTURED TO CONSISTENT FORMULAS WITH DOCUMENTED MELTING POINTS, POURING TEMPERATURES, AND METALLURGICAL STRUCTURES THAT MATCH ESTABLISHED INDUSTRY DATA.

ROTOMETALS NUMBER 1 BABBITT, ASTM GRADE 1, IS A HIGH‑TIN ALLOY CONTAINING APPROXIMATELY 90–92% TIN, 4–5% ANTIMONY, AND 4–5% COPPER. IT HAS A MELTING POINT OF ABOUT 433°F AND A POURING TEMPERATURE OF ABOUT 825°F. THIS ALLOY IS USED IN HIGH‑SPEED, HIGH‑PRECISION ROTOMETALS BEARING APPLICATIONS WHERE EXCELLENT EMBEDDABILITY, CONFORMABILITY, AND FATIGUE RESISTANCE ARE REQUIRED. ITS ADVANTAGES INCLUDE SUPERIOR ANTI‑FRICTION PERFORMANCE AND HIGH SURFACE SPEED CAPABILITY, WHILE ITS DISADVANTAGES ARE HIGH MATERIAL COST AND LOWER SUITABILITY FOR EXTREME SHOCK LOADS COMPARED TO HARDER TIN‑BASED GRADES.

ROTOMETALS ROTONICKEL BABBITT, ASTM GRADE 2, IS A TIN‑BASED ALLOY WITH APPROXIMATELY 88–90% TIN, 7–8% ANTIMONY, AND 3–4% COPPER. ITS MELTING POINT IS ABOUT 466°F AND ITS POURING TEMPERATURE IS ABOUT 795°F. ROTOMETALS CUSTOMERS USE THIS ALLOY FOR MEDIUM‑LOAD, HIGH‑SPEED BEARINGS WHERE A BALANCE OF HARDNESS AND EMBEDDABILITY IS REQUIRED. ITS PROS INCLUDE HIGH FATIGUE STRENGTH AND GOOD LOAD CAPACITY, WHILE ITS CONS INCLUDE HIGHER COST AND SLIGHTLY LOWER EMBEDDABILITY THAN GRADE 1.

ROTOMETALS SUPER TOUGH BABBITT, ASTM GRADE 3, CONTAINS APPROXIMATELY 83–85% TIN, 7.5–8% ANTIMONY, AND 7–8.5% COPPER. ITS MELTING POINT IS ABOUT 464°F AND ITS POURING TEMPERATURE IS ABOUT 915°F. THIS ALLOY IS USED IN HEAVY‑LOAD, LOW‑SPEED ROTOMETALS BEARING APPLICATIONS WHERE HIGH COMPRESSIVE STRENGTH AND WEAR RESISTANCE ARE REQUIRED. ITS ADVANTAGES INCLUDE EXCEPTIONAL LOAD‑CARRYING CAPACITY AND RESISTANCE TO POUNDING, WHILE ITS DISADVANTAGES INCLUDE LOWER EMBEDDABILITY AND HIGHER SHAFT FINISH REQUIREMENTS.

ROTOMETALS GRADE 11 BABBITT, ALSO KNOWN AS SAE 11, IS A TIN‑BASED ALLOY WITH APPROXIMATELY 86–89% TIN, 6–7.5% ANTIMONY, AND 5–6.5% COPPER. ITS MELTING POINT IS ABOUT 470°F AND ITS POURING TEMPERATURE IS ABOUT 620°F. THIS ALLOY IS USED FOR GENERAL PURPOSE ROTOMETALS BEARINGS WHERE MODERATE LOADS AND SPEEDS ARE PRESENT. ITS PROS INCLUDE BALANCED PERFORMANCE AND REASONABLE COST, WHILE ITS CONS INCLUDE LOWER HIGH‑SPEED CAPABILITY THAN GRADE 1 AND LOWER HEAVY‑LOAD CAPABILITY THAN GRADE 3.

ROTOMETALS COPPER HARD BABBITT, ASTM GRADE 6 PLUS, IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 50–52% LEAD, 35–37% TIN, 11–13% ANTIMONY, AND ABOUT 1% COPPER. ITS MELTING POINT IS ABOUT 360°F AND ITS POURING TEMPERATURE IS ABOUT 655°F. ROTOMETALS CUSTOMERS USE THIS ALLOY FOR HEAVY‑DUTY, SLOW‑SPEED BEARINGS WHERE COST CONTROL AND WEAR RESISTANCE ARE IMPORTANT. ITS ADVANTAGES INCLUDE LOWER COST AND GOOD LOAD CAPACITY, WHILE ITS DISADVANTAGES INCLUDE LOWER HIGH‑SPEED PERFORMANCE AND LEAD CONTENT REQUIRING PROPER SAFETY PRACTICES.

ROTOMETALS FORMULA 0 HEAVY PRESSURE BABBITT, ASTM GRADE 7, IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 74–76% LEAD, 9–11% TIN, AND 14–16% ANTIMONY. ITS MELTING POINT IS ABOUT 464°F AND ITS POURING TEMPERATURE IS ABOUT 640°F. THIS ALLOY IS USED IN ROTOMETALS HEAVY‑PRESSURE INDUSTRIAL BEARINGS WHERE SHOCK LOADS AND MODERATE SPEEDS ARE PRESENT. ITS PROS INCLUDE GOOD LOAD CAPACITY AND LOW COST, WHILE ITS CONS INCLUDE LOWER FATIGUE RESISTANCE AND LEAD‑RELATED SAFETY REQUIREMENTS.

ROTOMETALS NUMBER 4 HARDWARE BABBITT IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 84–86% LEAD, 1–2% TIN, AND 12–14% ANTIMONY. ITS MELTING POINT IS ABOUT 473°F AND ITS POURING TEMPERATURE IS ABOUT 625°F. THIS ALLOY IS USED FOR GENERAL ROTOMETALS HARDWARE AND BEARING APPLICATIONS WHERE LOW COST AND ADEQUATE WEAR RESISTANCE ARE REQUIRED. ITS ADVANTAGES INCLUDE VERY LOW COST AND GOOD WEAR RESISTANCE, WHILE ITS DISADVANTAGES INCLUDE LIMITED HIGH‑SPEED PERFORMANCE AND LOWER EMBEDDABILITY.

ROTOMETALS GRADE 13 BABBITT IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 83–85% LEAD, 5.5–6.5% TIN, AND 9.5–10.5% ANTIMONY. ITS MELTING POINT IS ABOUT 485°F AND ITS POURING TEMPERATURE IS ABOUT 620°F. THIS ALLOY IS USED FOR GENERAL INDUSTRIAL ROTOMETALS BEARINGS WHERE MODERATE SPEEDS AND LOADS ARE PRESENT. ITS PROS INCLUDE COST EFFECTIVENESS AND ADEQUATE LOAD CAPACITY, WHILE ITS CONS INCLUDE LOWER HIGH‑SPEED PERFORMANCE AND LEAD‑RELATED REGULATORY REQUIREMENTS.

ROTOMETALS MERIT BABBITT IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 73–75% LEAD, 9–10% TIN, AND 15–17% ANTIMONY. ITS MELTING POINT IS ABOUT 450°F AND ITS POURING TEMPERATURE IS ABOUT 645°F. THIS ALLOY IS USED FOR GENERAL PURPOSE ROTOMETALS BEARINGS IN LEGACY MACHINERY WHERE COST IS A PRIMARY FACTOR. ITS ADVANTAGES INCLUDE LOW COST AND ADEQUATE PERFORMANCE FOR MODERATE CONDITIONS, WHILE ITS DISADVANTAGES INCLUDE LIMITED HIGH‑SPEED CAPABILITY AND LOWER FATIGUE STRENGTH.

ROTOMETALS ROYAL BABBITT, ASTM GRADE 8, IS A LEAD‑BASED ALLOY WITH APPROXIMATELY 79–81% LEAD, 4.5–5.5% TIN, AND 14–16% ANTIMONY. ITS MELTING POINT IS ABOUT 459°F AND ITS POURING TEMPERATURE IS ABOUT 645°F. THIS ALLOY IS USED FOR GENERAL INDUSTRIAL ROTOMETALS BEARINGS WHERE MODERATE SPEEDS AND LOADS ARE PRESENT AND A HARD, WEAR‑RESISTANT SURFACE IS REQUIRED. ITS PROS INCLUDE GOOD WEAR RESISTANCE AND COST EFFECTIVENESS, WHILE ITS CONS INCLUDE LOWER HIGH‑SPEED PERFORMANCE AND LEAD CONTENT REQUIRING PROPER HANDLING.

ACROSS THE ENTIRE ROTOMETALS BABBITT LINE, TIN‑BASED ALLOYS PROVIDE SUPERIOR HIGH‑SPEED AND HIGH‑FATIGUE PERFORMANCE, WHILE LEAD‑BASED ALLOYS PROVIDE COST‑EFFECTIVE SOLUTIONS FOR MODERATE‑SPEED, HEAVY‑LOAD, OR LEGACY APPLICATIONS. ALL MELTING POINTS, POURING TEMPERATURES, AND FORMULAS ARE BASED ON ESTABLISHED ASTM B23 DATA AND VERIFIED INDUSTRY REFERENCES. ROTOMETALS CUSTOMERS SELECT BABBITT ALLOYS BASED ON DOCUMENTED OPERATING SPEED, LOAD, TEMPERATURE, AND LUBRICATION CONDITIONS TO ENSURE OPTIMAL SERVICE LIFE AND PERFORMANCE.