Friction Reduction Capabilities of Silicate Compounds Used in an Engine Lubricant on Worn Surfaces

Table 1

Test operating conditions of four-ball test rig.

1	Load (kgf)	50
2	Ball specimen diameter (mm)	12.7
3	Speed (rpm)	1200
4	Oil temperature (°C)	90
5	Ball type	EN 31 steel
6	Ball roughness (microns)	0.6
7	Composition of EN 31 steel	C: 1%, Mn: 0.50%, Cr: 1.40%, Si: 0.2%