FWIW, My ETR BL12-24 is a Craftsman lookalike (As was the Warco BH600)
The 450 Kg probably includes the weight of the stand, and of the packaging. My BL12q-24 was quoted at 300KIg without the stand.
The wooden pallet was quite substantial, and the Faceplate, steadies and 4 jaw chuck are not light.
The spindle bore is 5MT and the machines came with a plain 5 – 3MT sleeve, allowing work to be passed through the headstock.
In standard form the motor to countershaft pulleys have two two sheaves.
The Countershaft to Spindle drive uses three sheave pulleys. Both drives use B section belts.
With the Back Gear, this gives a choice of 12 speeds from 50 to 1160 rpm
(The 8″ 4 jaw chuck spinning at 1160 rpm plus is quite a sight to witness!)
My machine actually has VFD so the 3 phase motor only uses one sheave, and theoretically it has only 6 speed ranges, but being modified by the VFD, has caused me no problems.
Being idle, most of the time, I tend to use mid speed and use the VFD to control speed.
The range of feeds and threads is quite wide, but, I made a 80T 1.25 Mod gear for the input to the gearbox, to halve the feed rate. This necessitated repositioning the retaining stud for the gear cover, and new knob for the control “nut”.
My machine came with an extra 30T pinion, so the coarsest pitch that i have cut was 4 mm, using the 40T input gear, with back gear and minimum speed.
Possibly, by using the 30T as the input to the gearbox, and the standard 40T driver, the coarsest pitch could be 6 mm, but have yet to find a need for that.
Howard