Jasons comment on the desirability of 5,000 (or more) rpm to exploit the use of modern, smallish, carbide cutters raises important questions of machine design philosophy.
The Warco is old school “traditional” design philosophy for this type of hefty, fixed column bench mill. Right from their inception, over 30 years ago, these have been best thought of as a Bridgeport on the bench. Metal removal capabilities, working cube area etc being not vastly dissimilar to a Bridgeport if the ram isn’t being exploited most especially the earlier, smaller, round ram variety. As such it’s sensible to follow Bridgeport practice when selecting the appropriate (HSS) cutter sizes and rpm. In the days when I had a machine of that style I was most impressed by its ability to shift metal.
If you plan to work Bridgeport style the primary issue with the Warco is hand elevation of the head. Mine had a tiddly crank handle on the side which was both inconvenient to reach and ‘kin hard work. At least it was right handed, unlike the Warco. I’d regard power drive of the head lift screw as per Wiess pretty much essential. The Wiess hand wheel travel dial is a nice touch but it’s high and well out or reach for both easy turning and reading. I had one of my DRO scales on the head lift. The power downfeed on the Warco is nice touch but I question how useful it is to a Model Engineer doing small work. I rarely use mine on the Bridgeport I now run. Accept that the GH head gears will be noisy but that is the price for rising torque at low rpm to better handle bigger cutters.
The Weiss design philosophy seems a little incoherent. As Jason says 5,000 rpm is great for small carbide cutters but, even with modern brushless motor drive, considerable sacrifice of torque at low RPM is inevitable. So if you plan to work Bridgeport style it’s likely you will be power limited on larger HSS cutters. Power head lift is great and the dial on the hand wheel potentially useful until you get round to adding DRO. However if you plan to go modern with smallish high speed carbide cutters the big head is likely to be a major inconvenience. With a short cutter visibility and access for set up will be seriously restricted. Thats why my version had to go. Got fed up with peering round the head trying to get a straight look for alignment. Seriously considered a straight shank ER collet extension so I could lift the head but that still did’t cure the other space issue of limited table area and movement. But I’m home workshop guy working 12″ to the foot scale so table area is more important to me than to those working in smaller scales.
Drifting off topic.
Taking Jasons idea and running with it my take on a more suitable machine to exploit smaller carbide cutters would be to use a vastly smaller head with an ER16 collet spindle. Think Taig head on steroids. Forget a moving quill. Use a second dovetail slide for equivalent short down feed. Minimal controls and gubbins on the head and arrange what there are Bridgeport style well above the main spindle bearings et al leaving a slim nose so you can see what you are doing underneath. High speed small cutters mean less spindle loading so you don’t need the relatively hefty bearings and big head to hold them traditionally used. ER16 takes up to 10 mm native so many folk could do without a drill chuck altogether. Ball screw equipped, CNC ready, design with stepper feed as standard makes sense. Small cutter loads means a smaller screw than the usual conversions will do.
All the world and his wife adds a DRO just as soon as they can afford it so why not go radical and dump the handles altogether and control the machine electronically either by via MPG handset or, more precisely, by typing the next stop position into the DRO box. Big issue would be rethinking the DRO to make a control system rather than just an indicator. For example including the ability to simply program clearing a rectilinear pocket or automatically drill holes on a pitch circle.
Clive