Abrasive Blasting, Shot Peening & Surface Prep worked example
Part Rotation Time at 23% rigging and safety allowance: a worked example
Push rigging and safety allowance up to 23% and the picture changes. This example computes every intermediate figure at that operating point. you need to schedule the non-blasting time required to flip, index, or reposition parts safely
The inputs for this scenario
- Reorientations required: 24 rotations (unchanged)
- Reorientation rate per hour: 8 rotations / hr (unchanged)
- Rigging and safety allowance: 23 % (raised for this scenario; the documented default is 20)
Working through the calculation
- Applying the documented formula (Base rotation time = required part rotations รท rotation handling rate) to the inputs above produces each figure below.
- At this operating point the engine returns 3.69 hr for rotation handling time, the number this scenario is built around.
- At this operating point the engine returns 3 hr for base rotation time.
- At this operating point the engine returns 23 % for rigging allowance.
- At this operating point the engine returns 8 rotations / hr for rotation handling rate.
How this compares with the baseline
- Against the tool's baseline example, where rigging and safety allowance sits at 20% and the headline result is 3.6 hr, this scenario comes in 2.5% above the baseline at 3.69 hr.
- It computes total rotation handling hours by dividing required reorientations by the handling rate and padding for rigging and safety. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.
Results at a glance
- Rotation handling time: 3.69 hr (headline result)
- Base rotation time: 3 hr
- Rigging allowance: 23 %
- Rotation handling rate: 8 rotations / hr
Run it with your numbers
- Every input above is editable in the live Part Rotation Time calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.