1924 William designed and added a line of non-reversing and quick change drill and tap holders ("QC" tools).

1929 Harry G. Procunier, Williams' son, took over and incorporated it as the Procunier Safety Chuck Company in Illinois.

1931 Harry designed and developed the first friction type reversing tapping attachment with the patented "Tru-Grip" collet chuck, ("E" Series). These tappers were then united with the "Delta" drill press to produce a tapping machine with constant pressure feed and "Hi-Boy" Coolant Pump ("D" machines).

1949 John designed and introduced a Heavy Duty Tapper ("F" Series).

1954 John developed the hand model Lead Screw Tapper ("L" Series) combining the "E" Series with a lead screw for controlled feed.

1957 Richard A. McConnell, Johns' son, redesigned the hand style tapper into a completely self-contained automatic lead screw tapping, unit and machine. (#1-AL)

1960 Richard designed and introduced a larger capacity automatic lead screw tapper (#3-AL) increasing its market share.

1966 Procunier moved from downtown Chicago to the West Side, doubling its plant size.

1976 Richard A. McConnell became President.

1977 Richard developed and introduced multiple spindles tapping and drilling heads as an entry into an additional market.

1981 With the need for larger facilities and additional equipment. Procunier moved to its new 31,000 square foot building in Lakeland, Florida and became a Florida Corporation.