Does the body of a Kids Tool Box go through the gauge?

No. At 260 mm across it cannot enter a 31.7 mm cylinder. Only detached fittings are gauged.

Is a 4 mm lid seam a pinch gap?

It is borderline. Between 3 and 5 mm a fingertip enters and comes out scraped. Add a rib, or round the rim to R2.

Can a grade 3 odour pass?

Grade 3 sits below the limit but is re-graded. A second 3 passes; a 4 rejects the lot.

Why is the drop set at 90 cm?

It matches a bench-to-floor fall. A Kids Tool Box is light, so 90 cm already exposes tongue and hinge faults.

Should samples be kept?

Yes: one whole case plus every detached fitting, bagged with cavity and lot. Odour disputes arrive after delivery.

Kids Tool Box Safety: Small Parts, Pinch Gaps and Odor

Quick answer: Safety checks on a Kids Tool Box fall into three groups: parts that come off, gaps that pinch, and smells that linger. Loose parts go through a 31.7 mm gauge after a 70 N pull, gaps must miss the 5 to 12 mm band, and odour is graded 1 to 5 with 3.5 as the limit.

Three Groups of Checks for a Kids Tool Box
Small Parts and the 31.7 mm Gauge
Pinch Gaps and Hinge Scissors
Odour Grades and Bake Conditions
Drop and Latch Retention
FAQ

1. Three Groups of Checks for a Kids Tool Box

A Kids Tool Box has three groups an instrument or a nose can settle: parts that come off, gaps that pinch, smells that linger. Edges and drops join them.

Sampling takes three units from one lot: one stripped, one dropped, one sealed for odour, all from the same cavity. Every rejection needs a symptom and a number.

Group	Tool or method	Rejection
Loose parts	31.7 mm gauge after a 70 N pull	Part falls through
Pinch gaps	Feeler gauge along the rim	Gap lands in 5 to 12 mm
Odour	Graded after 2 hours at 60 C	Grade 3.5 or above
Latch hold	90 cm drop on six faces	Lid opens, tongue breaks

2. Small Parts and the 31.7 mm Gauge

The gauge is a cylinder 31.7 mm across and 57.1 mm deep with a tapered base, standing in for the front of a mouth. A detached part that settles under its own weight counts as a small part.

The body of a Kids Tool Box never enters it, since the smallest size is 260 mm across. Fittings do: handle plugs, feet, nameplates, latch tongues and rivets.

Pull is 70 N held for 10 seconds, square to the surface, and torque 0.45 Nm clockwise for 5 seconds. Anything that separates goes straight into the gauge. Rivets are judged by the head flange: under 1.4 times the shank diameter, the whole rivet pulls out.

3. Pinch Gaps and Hinge Scissors

Pinching clusters between 5 and 12 mm: below 5 no finger enters, above 12 it comes back out, and in that band the knuckle jams.

Three gaps are measured point by point on a Kids Tool Box: the lid seam, the handle opening and the hinge cut. The seam stays under 3 mm, checked with a 0.5 mm feeler run around the rim.

A living hinge forms a scissor opening that changes angle; a finger in an 8 mm gap is cut when the lid closes. Recessing the hinge keeps it under 5 mm.

Gap	Finger	Action
0 to 3 mm	Will not enter	Accept
3 to 5 mm	Tip enters	Add a rib
5 to 12 mm	Knuckle jams	Retool
12 to 20 mm	In and out	Round to R2

4. Odour Grades and Bake Conditions

Odour runs 1 none, 2 just detectable, 3 clear, 4 sharp, 5 acrid, with 3.5 as the limit.

Grading follows 2 hours at 60 C and 30 minutes to cool, then the lid opens. A part that smells of nothing when cold often reaches grade 3, as volatiles collect in a closed case.

Five people grade alone and the highest and lowest scores are dropped; after ten samples the nose tires. Sources sit in masterbatch, release agent and regrind; a deep Kids Tool Box cavity holds odour longer.

Grade	Description	Decision
1	None	Pass
2	Just detectable	Pass
3	Clear, not sharp	Re-grade
4	Sharp	Reject
5	Acrid	Reject, check resin

5. Drop and Latch Retention

Drop height is 90 cm onto concrete, six faces plus three edges and a corner, ten drops in all. After each one the lid is checked for a sprung lid, a broken tongue, a cracked hinge and a sharp rim.

With 0.5 kg of ballast the seam must not open beyond 3 mm and opening force may fall 20 percent at most. A case that still springs open at 60 cm has under 0.4 mm of tongue interference.

A split lip leaves a 0.2 mm flake that looks blunt and cuts skin, so edges are rechecked with a tester.

Conclusion

Three rulers cover a Kids Tool Box: a 31.7 mm gauge for loose parts, the 5 to 12 mm band for pinching, a 1 to 5 scale for odour. Add 70 N of pull, a 90 cm drop and a 0.5 mm edge, and the inspection sheet is complete. Write the rejection first, argue about feel later.

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.