CNC Job Setup Sheet Generator — Speeds, Feeds & Chipload Verification

How It Works

1. Enter Job Information

   Part number, work order, material, and operation type. Select material preset for typical SFM ranges.

2. Add Cutting Tools

   Up to 8 tools: tool number, description, diameter, flutes (milling) or nose radius (turning), SFM, and feed per tooth.

3. Review Calculated Parameters

   RPM, Feed IPM, Feed IPR, chipload, and estimated Ra compute automatically.

4. Check Chipload Verification

   Green/yellow/red indicators flag underfeeding (rubbing) and overfeeding (breakage risk).

5. Print or Export

   Preview in professional shop format with sign-off lines. Export as PDF for posting.

Built For

• CNC setup operators creating standardized documentation for each job
• Shop supervisors requiring documented setup verification before first articles
• Job shop machinists managing multiple part numbers
• Training programs teaching setup planning and documentation
• Quality systems requiring traceable setup records for ISO 9001 or AS9100
• Shops transitioning from hand-written setup cards to digital documentation

Features & Capabilities

Dynamic Tool Table

Up to 8 tools with milling or turning parameters. Add/remove tools as needed.

Auto RPM and Feed

RPM, feed rate, IPR, and chipload calculated from SFM and geometry inputs.

Chipload Verification

Color-coded check: green (good), yellow (borderline), red (under/overfeeding).

Surface Finish Estimate

Theoretical Ra for each tool using standard feed-to-finish formulas.

Professional Print Format

Job header, material block, tool table, notes, and sign-off lines matching traditional shop setup cards.

PDF Export

Export as branded PDF for machine posting or quality records.

Assumptions

• RPM calculated as SFM x 12 / (pi x cutter diameter) per standard machining formula
• Feed rate (IPM) calculated as chip load per tooth x number of flutes x RPM for milling operations
• Feed per revolution (IPR) for turning calculated directly from user input or derived from IPM/RPM
• Theoretical surface finish (Ra) estimated from feed and nose radius using Ra = f^2 / (32 x r)
• Chipload verification ranges based on general carbide tooling recommendations from Machinery's Handbook
• Material presets provide typical SFM starting ranges for carbide tooling under standard conditions

Limitations

• Does not verify that calculated RPM is within the machine spindle speed range; user must confirm against machine specs
• Chipload verification is a general guideline and does not account for specific tool geometry, coating, or manufacturer recommendations
• Surface finish estimates are theoretical minimums; actual finish will be 1.5-3x worse under normal conditions
• Maximum 8 tools per setup sheet; complex multi-operation parts may require multiple sheets
• Does not generate tool path or program structure; setup sheet is for parameter documentation only
• Coolant type, flow rate, and delivery method (flood, through-tool, mist) are not calculated

References

• Machinery's Handbook, 31st Edition - Speeds, Feeds, and Machining Power (SFM and chipload tables)
• ASME B46.1 - Surface Texture (theoretical surface finish formulas)
• ISO 9001:2015 - Quality Management Systems (documentation requirements for setup verification)
• AS9100D - Quality Management Systems for Aviation, Space, and Defense (first article documentation)
• Sandvik Coromant - Metal Cutting Technology Training Handbook (speed and feed methodology)
• SME Fundamentals of Tool Design, 6th Edition - Setup Planning and Process Documentation

Frequently Asked Questions