Sintered Bronze Discs

SAE 841 is oil-impregnated bronze optimized for high speeds (up to 1,200 SFM) and moderate loads. SAE 863 is an iron-copper alloy designed for high loads (up to 4,000 PSI) but limited to slow speeds (max 225 SFM). Choose SAE 841 for most rotary applications; choose SAE 863 for heavy-duty, slow-moving linkages.

No. Never use grease on sintered bronze. Grease clogs the surface pores and prevents the impregnated oil from reaching the bearing surface. If additional lubrication is needed, use only SAE 30 non-detergent mineral oil.

Yes, but use sharp carbide tools and avoid coolant. Machining can smear the surface pores closed, reducing oil flow. Use light cuts, sharp tools, and air blast only for chip removal. Never use water-based coolants. They displace the oil and cause corrosion.

A sizing pin (burnishing) is preferred over reaming. Reaming can smear the pores closed unless the tool is extremely sharp. If you must ream, use a very sharp reamer with minimal stock removal and no coolant.

Soak the bushing in warm (not hot) SAE 30 non-detergent mineral oil for 24 hours. The porous structure will absorb the oil. For faster results, vacuum impregnation can be used if equipment is available.

Yes. Store sintered bronze in sealed plastic bags or containers. Cardboard and wood are porous and will wick the oil out of the bushings over time, reducing their service life before installation.

SAE 841 can operate at speeds up to 1,200 SFM (surface feet per minute). SAE 863 is limited to 225 SFM maximum due to its lower thermal conductivity. Exceeding these limits causes overheating and premature wear.