Robotic End-of-Arm Tooling worked example

Jaw Wear Reserve at 98% abrasive-duty derate: a worked example

Push abrasive-duty derate up to 98% and the picture changes. This example computes every intermediate figure at that operating point. you need to set aside the right dollars for jaw and contact-pad replacement on an EOAT gripper over a production interval.

The inputs for this scenario

  • Gripper cycles in service: 500 cycles (000s) (unchanged)
  • Jaw wear cost per thousand cycles: 1.8 $ / 1000 cycles (unchanged)
  • Abrasive-duty derate: 98 % (raised for this scenario; the documented default is 85)
  • Changeover and alignment labor: 120 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Jaw wear reserve = gripper cycles x jaw wear cost per thousand cycles x abrasive-duty derate + changeover and alignment labor) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,002 $ for total jaw wear reserve cost, the number this scenario is built around.
  • At this operating point the engine returns 2 $ / piece for jaw wear reserve cost per unit.
  • At this operating point the engine returns 882 $ for variable jaw wear reserve cost.
  • At this operating point the engine returns 120 $ for fixed jaw wear reserve adder.

How this compares with the baseline

  • Against the tool's baseline example, where abrasive-duty derate sits at 85% and the headline result is 885 $, this scenario comes in 13.22% above the baseline at 1,002 $.
  • It computes a total wear reserve from cycles times a per-thousand-cycle wear cost scaled by an abrasive-duty derate, plus fixed changeover and alignment labor, and expresses it per thousand cycles. 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

  • Total jaw wear reserve cost: 1,002 $ (headline result)
  • Jaw wear reserve cost per unit: 2 $ / piece
  • Variable jaw wear reserve cost: 882 $
  • Fixed jaw wear reserve adder: 120 $

Run it with your numbers

  • Every input above is editable in the live Jaw Wear Reserve calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.