Davenport Model B

The Davenport Model B is a cam-operated multi-spindle automatic for small bar work, with 5 chucks and 5 feed fingers, a regular feed-tube capacity of 9/16″ round, 1/2″ hexagon and 3/8″ square, and a maximum turning length of 2 1/2″. Its 9 cams and change gears set the cycle, and the motor drive is rated 10 H.P., 1,800 RPM.

Bar capacity depends on the feed tubes and on whether the oversize capacity is used. Special feed tubes take the regular machine up to 5/8″ round, 9/16″ hexagon and 7/16″ square. Oversize capacity is up to 13/16″ round, 11/16″ hexagon and 9/16″ square, and an oversize special feed tube raises that to 7/8″ round, 3/4″ hexagon and 19/32″ square. Whatever the bar, the longest length fed is 3″ and turning stops at 2 1/2″, so this is a machine for short parts.

Spindle speed is chosen from 27 changes covering 500 – 4,500 RPM. There are 60 feed changes, and the range of feed gears is given as .8 – 18.4 seconds. Index time is 4/10 second constant, so it does not grow when a slower feed gear is fitted. The driving shaft runs at 1,500 RPM and the hand wheel shaft at 750 RPM, half that speed, and the worm and wheel ratio is 60 to 6.

Tooling dimensions are fixed and worth checking against existing tool stock. Circular tools are 2″ in diameter, the tool spindle has a 3/4″ hole and a 1 3/8″ outside diameter, and the distance from chuck to tool spindle is 2 1/8″ minimum and 4 13/16″ maximum. Long feed cams are 7 1/2″ in diameter and cross feed cams 6″, both 3/8″ thick.

The machine stands on a 39″ x 61″ footprint with the top spindle 44 1/2″ from the floor and weighs 3,600 lbs (net). It ships in a 60″ W x 112″ L x 96″ H crate at a gross weight of 3,800 lbs domestic and crated, or 4,000 lbs foreign and boxed.