I'am reading a book written in the 20's and he mentions reciprocal bearings but google hardly recognizes the term. But after some hard-earned googling I think we refer to them today as internal shaft bearings. The way he describes them is: reciprocal bearings are used for reciprocating pumps, and similarly used in on the connection rods of large internal-combustion engines, and in many mechanisms operated by cams. Thanks.
internal shaft bearing = internal shaft bearing JUST EXACTLY WHAT YOU WERE SAYING IN YOUR QUESTION !!!
Bearings come in many types, and are designed for specific applications. Auto engines primarily create radial loading, but the loading is far from uniform through a single revolution. An application with uniform loading would normally use a ball bearing, but the extremes of force make a journal bearing with forced lubrication more suitable for high intermittent' loading. The image below shows typical journal bearings (bushings). The term reciprocal as an elision of reciprocating is entirely out of use (but might appear in manuals published in the 20's). Shaft bearing come in many categories, but in the case of non-linear reciprocating loads, they're now known as journal bearings.
