Stonewall Coppered Babbitt
The improved Stonewall Babbitt is especially adapted for such bearings as must withstand the force of impact and heavy pressure and run cool at high speed with little lubrication.
Stonewall is not brittle Babbitt, yet hard enough to carry a heavy load without squeezing from the box. It does not shrink appreciably and can be used for large or small bearings. Because of its plasticity, it conforms at once to the shaft. For the same reason, where the shaft is scored, Stonewall is especially adaptable.
As indicated by its compressive and tensile strength shown in the accompanying plots, Stonewall Babbitt affords an ample factor of safety for almost every bearing service where a high tin-based Babbitt was believed to be essential. When it is considered that its ultimate strength (that is, the point at which the metal breaks as indicated by its compression stress) is 17,100lbs. to the square inch, it becomes evident that this is an extraordinary Babbitt for bearings which are subjected to heavy load and pressure.
Strength without elasticity is of no avail in a Babbitt. As evidence of the elasticity is of no avail in Babbitt. As evidence of the elasticity of Stonewall Babbitt, its breaking point in tensile stress vs. strain is at 9,700 lbs. per square inch. It is because of this denasality combined with its compressive strength that Stonewall Babbitt can stand up so well under shock, load, pound, pressure and vibration.
Stonewall has a low co-efficient of friction and therefore requires less lubricating attention than any other Babbitt of equal strength. This property is of the utmost importance to bearing operating under heavy duty.