I don’t know why, but in recent years I’ve seen a rash of bearings with cracked inner races. Sometimes the damage was on relatively new machines with very few hours on them. Symptoms related to a ...

The blog I wrote several weeks ago about installing lock collars generated the question, “What if a lock collar is locked in the wrong direction during assembly? At worst, the lock collar will come ...

Interest rates affect the pricing of at-the-money options. Rising rates now make ATM call options more expensive than puts. An option collar of stock by selling a call and buying a put is more ...