Davenport Model B CNC Multi-Spindle Automatic Screw Machine
Key Specifications
Max Turn Length
bar capacity
bar capacity special feed tubes
bar capacity oversize
bar capacity oversize special feed tube
longest length fed
How much does the Davenport Model B CNC Multi-Spindle Automatic Screw Machine cost?
Estimated price range
Our best estimate for a multi-spindle automatic in this class — not a quote from Davenport Machine. Configuration moves it a long way.
Overview
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.
Full Specifications
| Parameter | Value |
|---|---|
| Bar Capacity | 9/16″ round, 1/2″ hexagon and 3/8″ square (regular capacity of feed tubes) |
| Bar Capacity Special Feed Tubes | up to 5/8″ round, 9/16″ hexagon and 7/16″ square |
| Bar Capacity Oversize | up to 13/16″ round, 11/16″ hexagon and 9/16″ square |
| Bar Capacity Oversize Special Feed Tube | up to 7/8″ round, 3/4″ hexagon and 19/32″ square |
| Longest Length Fed | 3″ |
| Max Turning Length | 2 1/2″ |
| Spindle Speed Changes | 27 |
| Spindle Speed Range | 500 – 4,500 RPM |
| Feed Changes | 60 |
| Range of Feed Gears | .8 – 18.4 seconds |
| Driving Shaft Speed | 1,500 RPM |
| Hand Wheel Shaft Speed | 750 RPM |
| Index Time | 4/10 second constant |
| First Feed Change Gear Shaft | 200 |
| Ratio of Worm and Wheel | 60 to 6 |
| Diameter of Circular Tools | 2″ |
| Diameter of Hole in Tool Spindle | 3/4″ |
| Outside Diameter of Tool Spindle | 1 3/8″ |
| Chuck to Tool Spindle Distance Min | 2 1/8″ |
| Chuck to Tool Spindle Distance Max | 4 13/16″ |
| Diameter of Long Feed Cams | 7 1/2″ |
| Diameter of Cross Feed Cams | 6″ |
| Thickness of Cams | 3/8″ |
| Chucks and Feed Fingers | 5 each |
| Cams | 9 |
| Motor Drive | 10 H.P., 1,800 RPM |
| Floor Space Required | 39″ x 61″ |
| Top Spindle Height From Floor | 44 1/2″ |
| Crate Size | 60″ W x 112″ L x 96″ H |
| Machine Weight | 3,600 lbs (net) |
| Gross Weight | 3,800 lbs (domestic / crated), 4,000 lbs (foreign / boxed) |
Specifications sourced from davenportmachine.com — verified 2026-10-03
Strengths & Limitations
Strengths
- Four listed bar capacities, from 9/16″ round on regular feed tubes up to 7/8″ round with the oversize special feed tube
- 27 spindle speed changes across 500 – 4,500 RPM and 60 feed changes give fine steps for matching speed and feed to a part
- Index time is 4/10 second constant, whichever feed gears are fitted
- Hexagon and square capacities are listed beside round for every feed tube arrangement, up to 3/4″ hexagon and 19/32″ square
- Small installation: a 39″ x 61″ footprint and 3,600 lbs (net)
Limitations
- Maximum turning length is 2 1/2″ and the longest length fed is 3″, which rules out longer parts whatever the bar size
- Regular feed tubes stop at 9/16″ round; bar up to 7/8″ round needs the oversize capacity with a special feed tube
- Spindle speed tops out at 4,500 RPM and is selected in 27 changes, not varied continuously
- The cycle comes from 9 cams and change gears and the table lists no CNC control, so a new part means a new cam and gear setup
Best For
Frequently Asked Questions
01
Regular feed tubes take 9/16″ round, 1/2″ hexagon and 3/8″ square. Special feed tubes go up to 5/8″ round, 9/16″ hexagon and 7/16″ square. The oversize capacity is up to 13/16″ round, 11/16″ hexagon and 9/16″ square, and the oversize special feed tube up to 7/8″ round, 3/4″ hexagon and 19/32″ square.
02
The maximum turning length is 2 1/2″ and the longest length fed is 3″. Those limits apply at every bar capacity, so longer parts are outside the machine's range. The distance from chuck to tool spindle is listed at 2 1/8″ minimum and 4 13/16″ maximum.
03
There are 27 spindle speed changes covering 500 – 4,500 RPM and 60 feed changes, with the range of feed gears listed as .8 – 18.4 seconds. The driving shaft turns at 1,500 RPM and the hand wheel shaft at 750 RPM. Index time is 4/10 second constant.
04
The footprint is 39″ x 61″ and the top spindle sits 44 1/2″ from the floor. Net weight is 3,600 lbs. The motor drive is 10 H.P., 1,800 RPM. The table gives no supply voltage and no figure for bar stock support behind the machine, so settle both with Davenport Machine before planning the layout.
05
Net weight is 3,600 lbs. Gross weight is 3,800 lbs domestic and crated, or 4,000 lbs foreign and boxed. The crate measures 60″ W x 112″ L x 96″ H, so plan rigging and door openings around the crate and not around the 39″ x 61″ footprint.
06
Circular tools are 2″ in diameter. The tool spindle has a 3/4″ hole and a 1 3/8″ outside diameter. Long feed cams are 7 1/2″ in diameter, cross feed cams are 6″, and both are 3/8″ thick. The machine carries 9 cams, with 5 chucks and 5 feed fingers.