TP-1602: #7 COLUMN COLLAR TO RETAIN RACK

* This is the main column support for floor standing models - the models are - TP-1601F 1602F 2001F * For bench models the code is - 16101010A *

* This hex bolt locks the column tube into the column support on models - TP-1601 1602 2001 *

* This shaft pinion is for the up/down movement on the quill - fits models - TP-1602 2001 *