Repeatable holding. Clean datums. Test ready.

Repeatability: same part repositioned same way. Accuracy: positioned at correct nominal. Production fixtures emphasize repeatability ±0.01 mm. Calibrated against master part for accuracy.

Hardened tool steel (D2, A2) for primary wear surfaces. 4140 for backing structures. Bronze bushings for pivots. Aluminum 6061 where weight matters.

Typical production fixtures 100,000-1,000,000+ cycles. Bearing surfaces hardened or replaceable. Maintenance schedule per customer requirement.

Force sensors, LVDT displacement, pressure transducers, optical sensors integrated per test specification. Calibration certificates with each sensor.

Test fixture investment $5,000-50,000+ depending on complexity. Pays back through faster cycle, repeatable results, reduced operator labor, defect detection.

Quick-change tooling, family-of-parts fixtures, programmable adapters. Cost vs flexibility trade-off — design per product mix.