Comet 3KV Vertical Knee Mill, 3 HP, R-8 spindle. Serial no. 75225; manufactured mid-1980s (exact year unknown). Currently under power in Hayward, WI 54843; a short run video is included with the listing photos.
YouTube run video. https://youtube.com/shorts/ketCR9hqV_8?si=Cp5_QQQ_1SlGBtZS
Table is 50″ × 10″ T-slotted. Travels: X 36″, Y 15″, Z (knee) 16″, ram 24″, quill 5″; quill diameter 3-3/8″. Spindle speed is variable, 60–4250 RPM, with power feeds of .0015, .003, and .006 IPR. Motor is 3 HP, dual-voltage 230/480V, 3-phase, recently rebuilt (approximately 5–6 hours of use since rebuild); new belts and brake pads installed. Measured backlash: X ≈ 0.17″, Y ≈ 0.021″. Good working order, currently in use; holds tolerance for typical shop work. Normal cosmetic wear.
Included: 17 used R-8 collets; used vise with handle and rotary base; dividing rotary head with three indexing plates and 3-jaw chuck; T-bolts and clamp set (fair condition); assorted used end mills, drills, taps, and centers.