Is a two-to-one gap between quotes normal for a custom industrial equipment case manufacturer?

Answer: Yes, if it can be explained: support geometry, hole count, tooling and test scope.

Can an order go below 20 units?

Answer: It can, at a higher unit price with tooling paid up front.

When do the 25 working days start?

Answer: On the later of drawing approval and deposit receipt; changes restart the clock.

Will the case still fit after the equipment is revised?

Answer: Cavity changes within 20 mm are handled by new foam; moved lifting points mean new tooling.

What if the cavity is out of tolerance on arrival?

Answer: Measure first. Up to 3 mm is absorbed by foam; beyond that, reject the batch.

Custom Industrial Equipment Case Manufacturer: Buying Guide

Quick answer: Quotes from a custom industrial equipment case manufacturer often differ by a factor of two, and the gap sits in support geometry, hole count and tooling amortisation. Fix cavity, loaded weight, centre of gravity and cut-outs before discussing a 20-unit minimum or a 25-working-day lead time.

What to Settle Before You Contact a Manufacturer
Three-Point Support, Centre of Gravity and Lifting Points
Openings and Access Hatches Fixed on the Drawing
Quotes, Minimum Order Quantity and Lead Time
Factory Lifting, Transport Fixing and Incoming Inspection
FAQ

1. What to Settle Before You Contact a Manufacturer

The first call with a custom industrial equipment case manufacturer is not about price. It is about cavity, loaded weight and centre of gravity, handling, and every opening the site needs. Miss one and the quote moves once a sample is moulded.

The cavity causes most rework. A machine of 1150 by 760 by 560 mm needs a 1200 by 800 by 600 mm cavity, with 25 mm of hand clearance per side.

Item	What to specify	Effect on the case
Internal cavity	Length, width, depth	Decides whether tooling is new
Loaded weight	Unit plus accessories	Drives wall thickness
Centre of gravity	Height, fore or aft bias	Sets lifting layout
Cut-out list	Diameter, count, face	Drives sealing method

With all four answered, a custom industrial equipment case manufacturer can quote something comparable. With an outline only, three bids describe three structures.

2. Three-Point Support, Centre of Gravity and Lifting Points

More support points is not better. On a floor with 2 mm of undulation a four-point base leaves one foot hanging and a corner cracks. The custom answer is three points: two pads in front, one long pad at the rear.

Each point is checked at 1.5 times loaded weight, so a 380 kg unit is verified at 190 kg per point. Lifting eyes run at a factor of four, within 150 mm of the centre-of-gravity line.

Custom Industrial Equipment Case Manufacturer: close-up of a black case corner, pebbled texture, recessed gasket channel along the lid rim, grey panel in the foam

Keep the sling at 60 degrees or more from horizontal, or the eye takes a shear load. On side-loading cases, two 3 mm stainless rails sit 2 mm below the foam floor.

3. Openings and Access Hatches Fixed on the Drawing

Cut-outs are where a custom industrial equipment case manufacturer adds cost fastest and where inspection fails most often. The drawing needs diameter, count, face coordinates and edge reinforcement.

A common set is a 60 mm cable entry, a 30 mm signal port and a 150 by 100 mm hatch that lets a technician reset a breaker without dismantling the machine. Keep holes 25 mm from the nearest rib.

Sealing follows: a 2 mm silicone gasket, bolts no more than 80 mm apart, tightened to 3 Nm, because more torque crushes the gasket. A continuous mark on the foam proves the hatch closes.

4. Quotes, Minimum Order Quantity and Lead Time

Read a quotation in blocks. Totals alone are meaningless: one shop hides tooling in the unit price, another spreads batch machining into material.

Cost block	Charged by	Amortised with volume
Material and moulding	Case weight, machine hours	Yes
Tooling and fixtures	One-off per set	No, can be staged
Machining and assembly	Hole count, operation	Partly

Minimum order quantity usually lands at 20 units; below that, tooling spreads too thin and the shop quotes high rather than accept. Between 20 and 50 it is staged across three batches, above 200 it is often waived.

A custom case has no shelf stock, so the delay clause matters: 0.3 percent of contract value per late day, capped at 5 percent, with ten units shipped early for trial fitting.

5. Factory Lifting, Transport Fixing and Incoming Inspection

Rehearse lifting once: four-point lift, hold 100 mm off the floor five minutes, watch for eye deformation. Fix with four 25 mm bands through the feet. Crates are heat-treated to ISPM 15 and stacked no more than three high.

Check	Method	Accept criteria
Internal cavity	Tape measure, three points per axis	Within plus or minus 3 mm
Support plane	Flat table, three-point contact	No rocking, under 1 mm
Cut-out position	Against drawing coordinates	Within plus or minus 2 mm
Sealing	Spray water for 10 minutes	No trace inside

Record measured values with photographs. Warranty from a custom industrial equipment case manufacturer starts at receipt, 12 months on structure, 6 on seals.

Conclusion

The difference between one custom industrial equipment case manufacturer and another shows up in drawing detail: three support points, eyes at a factor of four, cut-outs with coordinates, recorded inspection values. The clearer the drawing, the closer the bids. Put the inspection sheet into the contract before comparing prices from any custom industrial equipment case manufacturer.

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.