How far apart are IP65 and IP67 on a Rolling Tool Case?

Answer: One step in the water digit. IPX5 is a jet for three minutes per face; IPX7 is 30 minutes at 1 m depth. Below 25 percent compression, IP65 passes and IPX7 leaks.

Why 26 drops from 1.2 m?

Answer: Procedure IV asks for eight corners, twelve edges and six faces, one each. Opening the case mid-sequence voids the run.

What handle load counts as a pass?

Answer: 500 N at full extension held 60 s, set of 1.5 mm or less, then 3000 cycles without creep.

How do you check sealing without pressure gear?

Answer: Charge to 0.03 MPa with a hand pump, brush soap along the gasket and valve; bubbles locate a leak but do not replace the decay verdict.

Acceptance Tests for a Rolling Tool Case: IP65, 1.2 m Drop

Quick answer: A Rolling Tool Case is accepted on paper before it is accepted by hand: the IP class from IEC 60529, the method number from MIL-STD-810, and a sampling table the buyer writes.

Which standards a Rolling Tool Case is measured against
Sealing class and immersion judgement
Static load and fatigue on handle and casters
Drop and vibration method numbers
Field re-checks for salt fog and cold
Isolation and re-inspection of failed lots
FAQ

1. Which standards a Rolling Tool Case is measured against

The usual failures at goods-in are a supplier report treated as a verdict, and a claim of drop testing. Neither carries a sample size or a method number.

Check	Clause	Field method	Pass line
Enclosure sealing	IEC 60529 13.6, 14.2.5, IP65	Pressure decay, charge to 30 kPa	0.5 kPa drop in 60 s
Cold operation	MIL-STD-810 502.6 proc. I	4 h at -20 °C, then 3 cycles	Latches free, gasket uncracked
Transit drop	MIL-STD-810 516.6 proc. IV	26 drops from 1.2 m, 8 corners 12 edges 6 faces	No through-crack, latches shut
Random vibration	MIL-STD-810 514.6 proc. I	10 to 500 Hz, 30 min per axis	Handle tight, mounts white-free
Salt fog	MIL-STD-810 509.6	5% NaCl, 35 °C, 48 h	No red rust, wheels turn

2. Sealing class and immersion judgement

The 6 in IP65 is dust and the 5 is water jets. Dust runs with 2 kg of talc for 8 hours; jets come from a 6.3 mm nozzle at 12.5 L per minute, 3 m away, 3 minutes per face.

Rolling Tool Case: a closed blue case facing forward on a steel-edged bench, two front latches around a folding handle, dial gauge at right

Sealing is judged by pressure. Charged to 30 kPa and held 60 s, a Rolling Tool Case fails above 0.5 kPa of decay; the leak is too small to see, so a soap film finds it.

A 2.5 mm groove with 3 mm cord gives 30 to 40 percent compression; below 25 percent a jet passes and immersion never does.

3. Static load and fatigue on handle and casters

The handle and casters fail first, and both get blurred into a claim about being built strong.

Part	Load or cycles	Hold or rate	Pass line
Handle, extended	500 N	60 s hold	Set 1.5 mm or less
Handle cycling	3000 cycles	20 per minute	Locks, no creep
Caster static	350 N per wheel	24 h hold	Flattening 2 mm or less
Caster travel	5 km, 3 mm obstacles	4 km/h	Hub rise 15 °C or less

At 1.2 mm wall the head should not shift 2 mm sideways; empty that is invisible, at 20 kg it wobbles.

Caster mounts need 3 mm of wall, or white stress lines appear after 5 km.

4. Drop and vibration method numbers

Method 516.6 procedure IV calls for one drop on each of eight corners, twelve edges and six faces, 26 in total, on the same sample, lid closed.

Rolling Tool Case: a blue blow-moulded case flat on a worn wooden bench, dial gauge beside it, timber shelving and grey bins behind

The 1.2 m height comes from carrying height. Three things are judged: through-cracks, latches that spring open, and anything that shifts inside; one popping latch is a failure.

Vibration finds resonance. Sweep 10 to 500 Hz at 1.04 g rms, 30 minutes per axis. A Rolling Tool Case peaks near 25 Hz, where a half-extended handle triples the amplitude; run the sweep half out and fully closed.

5. Field re-checks for salt fog and cold

A plant lab runs the full set; the field re-check is four portable items.

Neutral salt fog: 5% NaCl at 35 °C for 48 hours, then check plated tubes for red rust.
Cold soak: 4 hours at -20 °C, then three open-close cycles while cold.
Hot soak: 2 hours at 55 °C; a softening gasket sticks and tears on opening.
Cold impact: after -20 °C, a 1 kg ball from 1 m onto the lid centre; dent 3 mm at most.

6. Isolation and re-inspection of failed lots

Judgement uses attribute sampling in three classes: critical cracks and broken latches with acceptance zero, major deviation at AQL 1.0, minor colour and scuffing at AQL 2.5.

At 500 pieces and level II the sample is 50: Ac 1 Re 2 for major, Ac 3 Re 4 for minor.

A failed lot is quarantined whole and tagged red; re-inspection doubles the sample to 100, and two failures in a row retire it.

Conclusion

Acceptance for a Rolling Tool Case is a reproducible document: clause, load, time, pass line. Sealing is 0.5 kPa of decay over 60 s, the handle 1.5 mm of set after 500 N, the drop the latches after 26 impacts from 1.2 m. That sheet, applied to every lot, is what keeps a Rolling Tool Case consistent.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.