Why does Military Precision Components Case fix slot clearance at 1.5 mm?

A: A smaller gap pushes tolerance into the wall, a larger one lengthens drop travel; 1.5 mm with 45 kg/m³ EVA keeps part shift inside ≤0.8 mm after the drop.

How is the 10⁶–10⁹ Ω surface resistance measured?

A: With the lid open, read the slot base, wall and rib top once each; all three inside the band pass, and the band is logged by order of magnitude.

How is ≤0.8 mm shift judged after a 1.2 m drop?

A: Two components are read, along the slot-mouth diagonal and along slot depth; either above 0.8 mm is an exception, and the 1.5 mm design margin is logged apart from acceptance.

Why is the hold-down frame kept off the slot mouth?

A: Press points sit on the rib tops so 400 N travels down the walls and the mouth takes only side restraint; too little clearance touches the part, too much lets the liner ride up.

What happens when a sampled case exceeds the line?

A: A case above ≤0.8 mm gets a full recheck, and the failing slot group traces back to milling tolerance and EVA density rather than a single-case repair.

Military Precision Components Case

Quick answer: Military Precision Components Case holds 18 slots at 1.5 mm clearance and 10⁶–10⁹ Ω foam, keeping part shift within 0.8 mm after a 1.2 m drop.

Military Precision Components Case: locating slot layout and clearance
Surface resistance band of the anti-static foam
Measuring part shift under six-face drop
Lid hold-down frame and slot-mouth clearance
Batch sampling shift rejection line
FAQ

1. Military Precision Components Case: locating slot layout and clearance

Military Precision Components Case spans 610 × 430 × 250 mm outside with a 545 × 365 × 195 mm cavity, a 4.2 mm wall, 6.3 kg empty and 12 kg loaded. The liner carries 18 locating slots at a uniform 1.5 mm clearance; multi-point location relies on the controlled gap between slot wall and part edge, not on milling the slot to a tight fit.

The slots are milled from EVA at 45 kg/m³, with depth layered against the 195 mm cavity height: the base pad bears load while the slot walls limit travel. Military Precision Components Case splits the 18 slots into six groups of three, with ribs between groups so one loaded slot cannot pull its neighbour out of line. The 1.5 mm clearance and 45 kg/m³ density bound the ≤0.8 mm reading after drop.

Slot group	Slot count	Clearance	Load path
groups 1-2	6	1.5 mm	base pad
groups 3-4	6	1.5 mm	slot wall
groups 5-6	6	1.5 mm	rib

2. Surface resistance band of the anti-static foam

The liner foam holds a surface resistance of 10⁶–10⁹ Ω, a band that neither lets charge sit on the slot face for long nor makes the bleed path too abrupt. Military Precision Components Case records surface resistance and slot clearance as two columns on one inspection card; either one out of band means a retest.

Military Precision Components Case olive closed shell standing in mud with a white label, splashed slurry, jungle foliage and an off-road vehicle behind

Readings are taken with the lid open, once at the slot base, once at the wall and once at the rib top; a group passes only when all three sit inside 10⁶–10⁹ Ω. Military Precision Components Case logs the band by order of magnitude rather than a single nominal value.

Shift rejection takes one line only: 0.8 mm.

Resistance band	Reading point	Recording	Verdict
10⁶ Ω	slot base	by magnitude	pass
10⁷–10⁸ Ω	slot wall	by magnitude	pass
10⁹ Ω	rib top	by magnitude	pass

3. Measuring part shift under six-face drop

The drop runs at 1.2 m on all six faces, once on a corner and once on a flat face, and the measured quantity is the offset of a locating slot from its baseline. Military Precision Components Case sets ≤0.8 mm as the shift ceiling, read along the slot-mouth diagonal and along slot depth; either component above the line is logged as an exception. The 1.5 mm clearance here is design margin, the 0.8 mm ceiling is acceptance margin, and the two figures are not interchangeable.

Measurement advances face by face. A scribed baseline is made at the slot mouth before closing, and an optical scale reads the offset after the drop. The lid hold-down frame is reset and the depth component re-read. The face order and shell surface temperature go onto the sheet together. The slot-clearance baseline after 3000 open-close cycles tells whether the walls have relaxed. Six faces of readings are merged into one shift table, and any cell above 0.8 mm sends the batch back for recheck. That closes the measurement loop.

4. Lid hold-down frame and slot-mouth clearance

The frame inside the lid has to press the liner rim when closed without deforming the slot mouth, so clearance is back-calculated from slot depth and frame thickness. Military Precision Components Case shapes the frame as a continuous perimeter with an open centre, placing the press points on the rib tops rather than directly above the slots, so 400 N of closing preload travels down the walls and the slot mouth takes only side restraint.

Military Precision Components Case black closed shells stacked on a factory floor beside a conveyor and white inspection table, workers nearby, green epoxy floor

Closing uses 4 latches at 400 N each, set at the corners for even loading. After 3000 open-close cycles the frame flatness and slot-mouth clearance are re-read; the frame must not sink and clearance must still be 1.5 mm. Dust and spray conditions referenced to IP66 and a 96 h salt fog are kept as box-side environmental records, not written as a certification conclusion.

5. Batch sampling shift rejection line

Before delivery a sample is drawn from the batch and six-face shift is read on each case, with the rejection line at ≤0.8 mm; a case above the line gets a full recheck rather than a liner repair. Military Precision Components Case files the shift reading alongside the slot group, so a failing group traces back to its milling tolerance and EVA density instead of being treated as a single-case fault.

The sampling sheet also lists open-close cycles, salt-fog duration and the resistance band, each paired with the shift reading.

Shift reading	Face	Rejection line	Action
0.4 mm	corner	≤0.8 mm	pass
0.7 mm	flat	≤0.8 mm	pass
0.9 mm	flat	above line	batch recheck

Conclusion

Military Precision Components Case ties the 1.5 mm clearance of 18 locating slots, the 10⁶–10⁹ Ω surface resistance and the ≤0.8 mm shift after a 1.2 m drop into one coupled set of readings. The 610 × 430 × 250 mm envelope, 4.2 mm wall and 45 kg/m³ EVA density are not isolated figures; slot grouping and resistance band set the shift rejection line together. JUNZHIJIA builds this protective case with the box-side structure and inspection items listed above.