Tag Archives: Self-Lubricating Bearing

Bunting’s Innovative BB16 Bearings

When most people think of a powder metal bearing they think of Bronze normally made to the SAE841, MPIF CT-1000-K26 or similar specification, but they don’t think of powder metal for heavy loaded bearing applications. Many years ago Bunting pioneered BB16 as a heat treated iron copper material to handle these applications. It was branded as “The world’s best kept secret” but this is no longer true for some heavy industry users.

Typical uses of Bunting’s BB16 material are for off road equipment, earth moving equipment, escalators and the US Military. BB16 is heat treated to a Rockwell Hardness B scale (HRB) of 70 to increase its resistance to deformity under heavy loads. Similar to our standard Bronze bearing line, BB16 bearings are vacuum impregnated with Oil. However BB16 bearings contain extreme pressure oil which remains in the pores of the bearing to provide lubrication from the bearing to the shaft during operation. However, BB16 possesses a maximum load value of 8,000 psi (pounds per square inch), a maximum velocity value of 35 sfpm (surface feet per minute), and a maximum load-at-velocity (PV) value of 75,000. BB16 bearings can operate at temperatures ranging from -10 degrees F to 220 F (-12 degrees C to 104 C). If your application requires a self-lubricating bearing that can withstand high loads, then Buntings BB16 may be able to solve your problem.