Fixture Calculator
CNCCookbook Fixture Calculator
Use this fixture calculator to determine if you’ll save with a custom workholding fixture. Compare two scenarios on the left and right.
  
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Fixture A
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Fixture B
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Description
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Build Time (Hours)
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Setup Fixture (Mins)
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Unload/Load Fixture (Mins)
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Parts Per Run
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Part Run Time (Mins)
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Fixture Run Time (Mins)
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Total Parts to Make
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Total Runs
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Total Machining Time (Mins)
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Total Machining Time + Setup (Mins)
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Total Machining Time + Setup + Build (Mins)
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Total Operator Loading Time (Mins)
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Total Time Savings (Mins)
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Total Load Time Savings (Mins)
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Hourly Billing Rate
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Total Cost Savings (ROI)
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Definitions
| Repeat Run | Click to set Build Time to zero. On repeat runs, the fixture already exists. |
| Fixture Plate | Click to reduce Setup Time to 1 minute. With a fixture plate, we’re dropping onto pins. |
| Palette Changer | Click to reduce Unload/Load time on Fixture B to 30 seconds. |
| Build Time | The length of time it will take to build the fixture |
| Setup Fixture | The time needed to setup the fixture on the machine so it’s ready to use |
| Unload/Load Fixture | The time needed to load material into the fixture and remove parts for the next run |
| Parts per Run | Number of parts the fixture produces per run |
| Part Run Time | Length of time to finish a single part on a run |
| Fixture Run Time | Time to finish all the parts in the fixture on a single run |
| Total Parts to Make | Total parts that will be made before the fixture is removed |
| Total Runs | Number of runs required to make all the parts |
| Total Machining Time | Total time to machine all runs |
| Total Machining Time + Setup + Build | Overall time for the job |
| Total Operator Loading Time | Time the operator will spend loading and unloading |
| Total Time Savings | Total savings of Fixture versus the other fixture |
| Total Load Time Savings | Total load time savings of Fixture versus the other fixture |
| Hourly Billing Rate | The hourly rate you charge for the job. Need to calculate your Machine Hourly Rate? Try this CNC Machine Hourly Cost Calculator. |
| Total Cost Savings (ROI) | Based on the time savings and hourly rate, this is your total cost savings. It’s basically the ROI of Fixture B over Fixture A. |
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Want more tools to be a better CNC’er? Visit CNCCookbook.com.
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Fixture Productivity Tips
- Reduce labor costs through longer cycle times with high-density fixtures. Longer cycles allows operators to run additional machines or perform other tasks.
- Using this calculator will identify how much more quickly you can move jobs through your machines. Moving jobs quickly means increased capacity without increasing machinery or employees.
- Tool changes are reduced with more parts on the table as each tool goes through every part before changing to the next tool. This saves additional time and reduces wear and tear on your machinery.
- Creative fixture designs and methods can also reduce the number of operations needed to make a part.
- Machine idle time can be drastically reduced by loading and unloading fixtures offline while the machine makes chips.
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