JerrySharrett
Senile Member
About moly
Keep in mind guys and gals this stuff we call moly is a solid.
""Molybdenum disulfide is an inorganic compound with the formula MoS2. It is a black crystalline sulfide of molybdenum that occurs as the mineral molybdenite. It is the residual of the ore from which molybdenum metal is extracted.--""
On machine tool applications, like engine lathes that have taper roller bearings, most times the bearing-to-race is adjustable and if loosely adjusted would allow a micrometre size particle to fit in that clearance space. If these bearings are adjusted to near zero clearance and that clearance is less than the particle size bearing damage could occur. Emphasis on could.
Now, if there is a significant gain in using moly, like longer bearing life, less input load on the spindle assembly or such, then have at it. I would not use moly myself in a lathe headstock as I would have the bearings adjusted too close for the moly particles to fit.
In machine tool spindle setups, lathe, mill, grinder, etc., one would use a looser fit in bearing clearance if running high speeds and not too great requirements of rotational tracking. Whereas, in situations requiring slow rotational speeds, threading, chamber reaming, etc., I would adjust bearing clearance to minimum and in that application moly could cause bearing damage.
Keep in mind guys and gals this stuff we call moly is a solid.
""Molybdenum disulfide is an inorganic compound with the formula MoS2. It is a black crystalline sulfide of molybdenum that occurs as the mineral molybdenite. It is the residual of the ore from which molybdenum metal is extracted.--""
On machine tool applications, like engine lathes that have taper roller bearings, most times the bearing-to-race is adjustable and if loosely adjusted would allow a micrometre size particle to fit in that clearance space. If these bearings are adjusted to near zero clearance and that clearance is less than the particle size bearing damage could occur. Emphasis on could.
Now, if there is a significant gain in using moly, like longer bearing life, less input load on the spindle assembly or such, then have at it. I would not use moly myself in a lathe headstock as I would have the bearings adjusted too close for the moly particles to fit.
In machine tool spindle setups, lathe, mill, grinder, etc., one would use a looser fit in bearing clearance if running high speeds and not too great requirements of rotational tracking. Whereas, in situations requiring slow rotational speeds, threading, chamber reaming, etc., I would adjust bearing clearance to minimum and in that application moly could cause bearing damage.