With a centre height just one inch greater than the No. 8 model, the 4.5" x 28" Holbrook Model B No. 9 lathe managed to weight, at 952 lbs., over twice as much  - with the bed being especially massive and having a deep support in the centre as large as the feet at each end.
Fitted with a sleeve down to a No. 2 Morse taper, the 1.25" bore headstock spindle ran in phosphor-bronze bearings that were parallel internally, but tapered externally and fitted with screwed rings to pull them into their tapered seats in the headstock casting. 12 spindle speeds (including those from the 4 to 1 ratio backgear) were provided and ranged from a low of 18 to a high of 858 rpm.
Though more substantial than that those fitted to the No. 8 lathe, the screwcutting gearbox and apron were both arranged and controlled in exactly the same way. The tailstock had a larger diameter, graduated barrel and, of course, a 2 Morse taper. Exactly the same range of standard equipment was supplied with this lathe as with the No. 8, and the general information given for that unit also applies this lathe..