Gear, hydraulic or turbine oil: getting the grade right

Most lubricant failures are specification problems, not product problems. What separates the families, and the habits that shorten oil life.
Bolt tensioning or torquing: which does your joint actually need?

Both tighten the bolt, but only one takes thread friction out of the equation. How to decide before your next shutdown.
Choosing the right hard-facing consumable for crusher rollers

A worn roller does not always need replacing. How the wear mechanism, not the hardness number, should decide which consumable you use.