Salient Characteristics - Desktop Lathe.doc

Salient Characteristics

The small-footprint, fully-automated, Computer Numerical Control (CNC) lathe that the government requires shall have the following salient characteristics. Note: All dimensions, specifications are given in a range format in which the operating characteristics of the machine must fall.

Physical Characteristics

· Work Area – General Requirements

· Distance Between Centers – Range of 15” to 25”

· Height of Centers – Range of 4” to 6”

· Swing Over Bed – Range of 8” to 12”

· Travel of Cross-Slide – 4” to 8”

· Travel of Top-Slide - .1” to 1”

· Top-Slide Rotation - 360°.

· Headstock

· Spindle Through Hole – Range of 1” to 2.5”

· Rotational Accuracy – No greater than 0.0005” (or angular equivalent)

· Unsupported Cylindrical Turning @ 100mm – No greater than 0.0005”

· Motor/Power Requirements

· Voltage – 110V, 50/60Hz is preferred. 208-230V, 50/60Hz can be considered as long as machine can run through a transformer to 110V.

· Power Consumption – Minimum 1HP, Maximum 3.5HP (Machines in this power range should fall in our physical footprint requirements, higher HP machines will be too large for our lab space.)

· Spindle Speed Operating Range – Anywhere between 25 and 60,000 rpm. Speeds must be infinitely variable within this range.

· Feed Requirements

· Automatic Feed Rate – Between 0.0020 and 0.0075 inches/revolution.

· X and Z Axis Path Feed Rate – Between 0.01” and 100 inches per minute.

· Ball Screw Precision Accuracy - +/- 0.0010” or better.

· Manual Thread-Cutting Range – Between 7 and 44 TPI (threads per inch).

· Thread-Cutting Programmability Required – Yes

· Tailstock Requirements

· Spindle Travel Distance – Range of 1.5” to 4”.

· Lateral Displacement - +/- 0.050” or better

· Controller Requirements

· Stand-alone PC with touchscreen monitor, or integrated Siemens 808 type controller or equivalent.

· Machine Footprint

· Width – Between 48” and 84”

· Depth – Between 24” and 44”

· Height – Between 18” and 84”

· Weight – Maximum of 1,500 lbs.

· Additional Characteristics

· Chuck Size – 3” to 6” Diameter 3-Jaw Chuck

· Coolant – Through-the-spindle (TTS) is optimal, but conventional coolant capability is acceptable.

Template last updated 07/28/2016