Handy Little Lathe Chart for the
Atlas and Atlas/Craftsman 10" and 12" Metal Lathes
Quickly find and then calculate proper surface feet per minute cutting speeds
Use the Color Coded chart to quickly set the correct RPM based on the material diameter.
This chart is NOT for the Atlas and Atlas/Craftsman 6" swing lathes. See our other listings for that chart.
LITTLELOCOS MODEL ENGINEERING is proud to present our HANDY LITTLE LATHE CHART, an outstanding timesaver for your shop. Using one chart, you can easily find the correct tool cutting angles and the proper cutting speeds for any of 22 different materials.
Cutting speeds match the ATLAS & CRAFTSMAN 10" and 12" swing metal lathes and are COLOR CODED for ease of use.
SPINDLE SPEEDS: Compare the following speeds to your metal lathe:
| Atlas
10"/12" |
28 |
45 |
70 |
112 |
83 |
134 |
211 |
345 |
|
164 |
266 |
418 |
685 |
500 |
805 |
1270 |
2072 |
HANDY LITTLE LATHE CHART – SPECIFICATIONS and USES
- Each chart is a FULL-COLOR DIGITAL PRINT on 11”x17” bright white paper.
- Each is FULL-SEAL HOT LAMINATED with heavy duty (5-mil) FILM. The chart is totally sealed for years of use and wipes clean with a soft cloth. We use only GBC Ultra-Clear Laminates and a commercial-quality laminator for highest quality.
- The Recommended Tool Geometries table gives all the angles needed to correctly grind your high-speed-steel cutter blanks to the correct cutting angles for 22 DIFFERENT MATERIALS.
- The Surface Feet Per Minute Cutting Speed table calculates the speed that the metal stock passes by the tool tip. THIS IS THE CRITICAL SPEED IN WORKING WITH METAL as each different material likes to be cut at different speeds.
- GRAPHICAL INSTRUCTIONS, PLUS TWO PAGES OF DETAILED INSTRUCTIONS are included with each chart, showing the definitions for each of the grinding angles and walking through a typical use for the chart.
- USE IT BACKWARD for your MILLING AND DRILLING OPERATIONS as the cutting speeds apply to all HSS cutters. Just take the rotating cutter diameter as the stock diameter and read the recommended RFM from the top of the chart.