What order quantity does a hard case manufacturer usually require?

Answer: Rotomolded bodies start at 80 units, custom colours at 200, a new mould at 300. Below that the tooling cost moves into the unit price.

Is a quote without a tooling line a good sign?

Answer: Usually not. The tool sits inside the unit price, so a short order pays for it twice. Ask for it separately with the refund condition.

How do I verify a hard case manufacturer tests in house?

Answer: Look for a regulated air supply, an immersion tank and a drop rig, then ask for raw records from the last three months.

Can lead time go into a penalty clause?

Answer: Yes, but per stage rather than as one total. Separate mould completion, first article approval and shipment.

Is 60 day payment terms normal?

Answer: It appears once annual spend passes about two million yuan; a first order is usually 30 days. Longer terms carry a financing cost.

Hard Case Manufacturer Quotes: MIL-STD and IP Clauses to Check

Quick answer: A hard case manufacturer quote is comparable only after mould, resin, hardware, foam, testing and packing sit on separate lines. Here is the order to check them, and the clause numbers to demand.

What a Hard Case Manufacturer Should Itemise in a Quote
Process Capability Before Certificates
Lead Time Is Five Stages, Not One Number
Writing MIL-STD and IP Clause Numbers Into Acceptance
Payment Terms, Tooling Ownership and Drawing Rights
Five Costs That Get Billed Twice
FAQ

1. What a Hard Case Manufacturer Should Itemise in a Quote

The first question is not the price but how many lines it contains. A single figure looks tidy until the drawing changes, at which point it becomes: quote it again.

The finer the split, the more room there is to negotiate later.

Quote line	Unit	What to examine	The vague version
Tooling	set, one off	refund path, quantity, owner	folded into unit price
Resin	kg, net plus loss	PE grade, density, UV package	polyethylene, no grade
Hardware	set	stainless grade, salt spray hours	304 written as stainless
Foam	set	density, hardness, CNC routed	thickness only
Testing	item	revision and method number	to national standard

Resin is worth isolating. A 60 L body weighs 9.2 kg net; with 8% scrap the quoted weight should read 9.9 kg. Across 300 units that 0.7 kg gap is 210 kg of compound, enough to explain a few thousand yuan.

2. Process Capability Before Certificates

Certificates can be bought inside two months. Process capability cannot.

Hard case manufacturer: close-up of a black case side showing one stainless steel draw latch beside a textured rubber overmolded handle

Capability sits in three places. Arm length sets the largest body a line can turn out, and a 2.5 m arm covers shells up to roughly 120 L before a bigger machine is needed. Oven spread matters too: above about 5 °C, wall thickness across one batch swings between 6 mm and 9 mm, latches stop clamping evenly and the leak test passes on Monday and fails on Wednesday. Mould plate thickness, 4 mm against 3 mm, decides tool life and how crisp the corners stay. Watch hardware assembly too: stainless latches are torqued around 6 N·m, and an under-torqued seat fails first in a drop test. Finally find the leak station, where a regulated air supply and an immersion tank decide whether the IP rating was measured or printed.

Machine line: arms multiplied by real shifts, not nameplate count.
Resin line: PE grade, density and the current inbound record.
Rework line: bodies in the bay and their tags.

3. Lead Time Is Five Stages, Not One Number

The rounder the lead time, the more it needs unpacking. Thirty days may or may not include first article testing.

Stage	Days	Waiting on	Compressible
Drawing release	3 to 5	both engineers	yes, with wall thickness
Mould build	18 aluminium, 25 steel	tool room	no, thinner plate only
First article and drop test	5 to 7	test room	no, skipping it means untested
Production	300 units, about 7 days	machine schedule	yes, extra shifts
Inspection and loading	3 to 4	third party	yes, book early

Added up, a realistic 300 unit order lands between 45 and 55 days. A hard case manufacturer promising 30 days, testing included, has removed two stages.

4. Writing MIL-STD and IP Clause Numbers Into Acceptance

A standard only works inside a contract. In a brochure it is an adjective.

Hard case manufacturer: olive green rotomolded case on a pale grey studio background, two steel latches and a folding front handle visible

Write the clauses like this: high temperature storage to MIL-STD-810H Method 501.7 at 55 °C for 24 hours; low temperature to Method 502.7 at minus 33 °C for 24 hours; drop to Method 516.8 from 1.2 m across five faces, 26 drops; ingress protection to IEC 60529 level IP67, immersed 1 m for 30 minutes; salt spray to ASTM B117 for 480 hours without white rust. Each line needs a sample size and a pass criterion. Compliant with military standard is not a clause.

5. Payment Terms, Tooling Ownership and Drawing Rights

A workable split is 30% deposit, 20% on first article approval, 40% on completion and 10% after inspection, with tooling refunded once cumulative volume passes 1,500 units.

Tooling ownership must stand alone. Most factories assume the mould is theirs and the buyer buys use of it, so write three points: whether the tool leaves when cooperation ends, who pays freight, and who holds copyright in the drawings.

Whether a hard case manufacturer refunds tooling depends on a written refund path, not on how friendly the answer sounded.

6. Five Costs That Get Billed Twice

Paying twice for one item is common here. Compare these five line by line:

Sampling: credited against the first order, never non refundable.
Mould modification: small changes within drawing scope belong in tooling.
Testing: sampled per batch, not billed monthly.
Foam routing: per set, not per tool path.
Export crate: fumigation is real, but it is a separate line.

Conclusion

Procurement here means turning one lump price into units that can be compared. Split the quote, walk the process, unpack the lead time, pin the clauses, and only then does the number mean anything. A hard case manufacturer worth keeping lets you take it apart.

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.