I have a Student 1500 square-head, circa 1969, and I don't know if Colchester modified the dimensions of the 'footprint' for any later 1800 model. However, from the foundation plan given in the manual for my lathe the overall dimensions are as follows:
a. Total length of machine, including drip-tray overhang is 61".
b. The diagram suggests an additional 18" clearance is given to the left of the machine to facilitate the removal of the change-wheel guard. This will be required regardless of the machine having a gearbox or not as certain threads and feeds rely on change-wheel configurations as input to the gear-box.
c. From the centre-line of the lathe to the rear motor guard, which protrudes from the rear of the machine, is 20".
d. From the centre-line of the lathe to the extreme end of the cross-slide hand-wheel is given as 14".
e. From the above it can be seen that the total 'depth' of the lathe is 34" as the splash-guard does not protrude beyond the lower motor guard.
Therefore if you work on a total minimum footprint of 79" x 34" for the actual lathe plus you should give yourself a practical work-space in front of it, of course. However, you should allow as much room as you possibly can to the left of the lathe to facilitate the loading of long stock through the head-stock spindle.
Trust this helps.
Edited By Chris Crew on 24/07/2021 03:39:45
Edited By Chris Crew on 24/07/2021 04:03:04