What separates a manual tool case from a toolbox?

Answer: Whether one person walks away with it. Under 2.5 kg loaded, 800 metres needs no hand change.

Do tiers slow picking down?

Answer: Only when they outnumber the picks. Two tiers suit a case opened ten times a day; a lift costs under two seconds.

Why leave tolerance in small-part slots?

Answer: Zero clearance jams on a line. A 0.8 mm divider with 0.5 mm tolerance lets tweezers lift a part cleanly.

Should an outdoor manual tool case be IP67?

Answer: Check how often it opens. IP54 with a 3 mm foam seal outlasts IP67 on a case opened daily.

Does colour coding really save time?

Answer: It saves the first glance. Colour carries at three metres and the number confirms at one.

Manual Tool Case Applications: Five Carry Scenarios

Quick answer: A manual tool case is sized by carrying distance, not volume: one person, 800 metres, under 2.5 kg. The five scenarios below differ in tiers, latches and slot tolerance.

Where a Manual Tool Case Fits
Tiered Trays and Clear Height
Slot Tolerance for Bench Work
Shoulder Load on Outdoor Callouts
Identification Speed for Service Visits
FAQ

1. Where a Manual Tool Case Fits

A manual tool case is defined by carrying method: one person, 800 metres, under 2.5 kg. Past that it is hauled, and handle, latches and tiers get redrawn. Sizes run 260 x 190 x 75 mm at 0.6 kg empty, 320 x 230 x 95 mm at 1.15 kg and 360 x 270 x 110 mm at 1.8 kg.

Handle position matters more than shell weight: a grip 10 mm off the centre of gravity makes the case nose forward, and at 6.5 kg loaded a grip under 110 mm turns a 200 metre walk into a cramp.

Class	Size (mm)	Tiers	Carry
Pocket	260 x 190 x 75	1	One hand
Single person	320 x 230 x 95	2	One hand
Enlarged	360 x 270 x 110	3	Hand plus strap

2. Tiered Trays and Clear Height

Three levels carry fixed jobs: 60 mm at the bottom for long bars, 35 mm for sockets, 28 mm on top for screws. Clear height equals the tallest item plus 5 mm, which is why 28 mm suits a 22 mm bit holder standing upright.

Manual tool case: black shell open, foam pad in the lid, base foam cut for a display, coiled cable, cylindrical handle, battery block, two latches

A 105 degree detent at the hinge holds the upper tray clear of the lid foam; it hides inside the knuckle yet decides whether the case opens one-handed. Tray floors need 2.5 mm wall and two ribs for 1.8 kg per tier; at 6.5 kg loaded each handle side carries 3.2 kg.

3. Slot Tolerance for Bench Work

Bench work is the tightest use, with parts down to 1.5 mm and a line that stops when one screw disappears. Slots need a tolerance band: 0.8 mm PP dividers form 12 x 12 mm cells held to plus or minus 0.5 mm, and a gap beyond 1 mm lets an M2 screw cross into the next cell.

Static control is a resistance target: body and liner are treated to land between 10^6 and 10^9 ohms, and below that band discharge sparks at a connector while above it charge never drains. A 5 mm EVA pad in the lid means an inverted case shifts nothing.

Slot	Size (mm)	Count
Screw cell	12 x 12	24
Long slot	90 x 14	3
Round pocket	32 dia	2

4. Shoulder Load on Outdoor Callouts

Time, not mass, limits this tier: 45 minutes on one shoulder is a normal leg, so the strap goes to 38 mm with 6 mm foam and an 8 mm recess.

Manual tool case: dark grey shell open, pale lid empty, base foam cut to a mixer outline with faders showing, coiled cable beside, two latches

IP67 is the wrong target for a case opened a dozen times a day: the gasket sets permanently after 3,000 cycles a year, while IP54 with a 3 mm foam seal holds water better. Rate -10 to 55 C, drop at 1 metre on six faces, hardware at 96 hours of salt spray.

5. Identification Speed for Service Visits

A technician runs six to eight visits a day and opens the lid twelve times per visit, so picking a manual tool case from a row beats internal layout. Five colours map to five part families, a 40 x 20 mm label carries the number and calibration date, and picking falls under three seconds.

Scenario	Items	Check
Kit servicing	36	20 s
Bench repair	29	15 s
Electrical duty	24	25 s
Outdoor survey	18	30 s
Doorstep service	22	12 s

Tiers and speed pull against each other: every tier doubles what is within reach and adds a lift, so doorstep service runs two while kit servicing runs three.

Conclusion

Across five scenarios, a manual tool case answers three questions: how far it travels with one person, whether the load needs tiers, what reveals a missing part. Distance sets weight and handle, tiering sets clear height, the checking method sets slot tolerance and colour, so a manual tool case ends up as equipment rather than a box.

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.