Spring MOQ and Pricing: Why Small Orders Cost More
Short answer: A small spring order costs more per piece because fixed costs — coiling setup, wire minimum purchase, machine programming, first-article inspection and packaging — are spread across fewer parts. On a typical 0.8 mm wire compression spring, setup and wire minimums might total USD 150–400, so 500 pieces carry USD 0.30–0.80 each in fixed cost while 50,000 pieces carry under a cent. Unit price falls steeply from 1 to about 10,000 pieces, then flattens. BQUQ quotes in 12 working hours and keeps MOQ flexible, but the arithmetic of amortization does not change.
What actually drives spring MOQ?
MOQ is not a policy invented to push buyers into bigger orders. It is the point at which a supplier can cover fixed costs without losing money. For a custom spring, those fixed costs fall into five buckets.
1. Setup and machine programming
A CNC spring coiler must be configured before it produces a single good part: feed rolls, pitch tools, cam timing, cutter position, and for compression springs, the exact free length that will settle to your specified solid height. On a compression spring with tight tolerances, this setup can consume 1–3 hours of machine time. That machine is not making sellable parts during setup, so the cost has to land somewhere.
2. Wire minimum purchase
Spring wire is bought by weight, and most mills sell in minimum spools or coils. If your spring uses 0.5 mm stainless wire, you may need to buy a 5–15 kg spool even if your order consumes 300 g. The remaining wire is not waste — it goes back into inventory — but it ties up capital and shelf space, and that is reflected in small-order pricing.
3. First-article and in-process inspection
Every new spring design needs a first article: wire diameter, outer diameter, free length, solid height, load at test height, end grind squareness, and often a salt-spray or fatigue check. For an ISO9001 shop, this documentation is not optional. A first article on a new part can take 1–2 hours of inspection time regardless of whether you order 100 pieces or 100,000.
4. Secondary operations
Many springs are not finished when they come off the coiler. They may need end grinding, stress relief, shot peening, plating, or a hot-set pass. Each of those operations has its own setup. Spring stress relief is a good example: a batch oven run has a minimum economic load, so a small order may wait to share a cycle or pay a full-cycle premium.
5. Packaging, labelling and shipping
Small orders are often packed by hand, labelled per your part number, and shipped as a discrete consignment. The handling cost per piece is far higher at 200 pieces than at 200,000.
How does price per piece change with quantity?
The table below shows an indicative cost breakdown for a 0.8 mm music-wire compression spring, 12 mm free length, 4 mm OD, with a specified load at 8 mm. Figures are typical for a Dongguan source factory and are meant to illustrate the shape of the curve, not to quote your part.
| Quantity | Setup + wire + FA cost (USD) | Fixed cost per piece (USD) | Variable cost per piece (USD) | Indicative unit price (USD) |
|---|---|---|---|---|
| 100 | 300 | 3.00 | 0.045 | ~3.05 |
| 500 | 300 | 0.60 | 0.040 | ~0.64 |
| 2,000 | 320 | 0.16 | 0.035 | ~0.20 |
| 10,000 | 350 | 0.035 | 0.028 | ~0.063 |
| 50,000 | 420 | 0.008 | 0.022 | ~0.030 |
| 200,000 | 600 | 0.003 | 0.018 | ~0.021 |
Two things stand out. First, the fixed cost per piece collapses between 100 and 10,000 pieces. Second, below roughly 10,000 pieces, the variable cost barely moves — material and machine time per part are almost constant. The entire small-order penalty is amortization.
Where the curve flattens
Notice that going from 50,000 to 200,000 pieces only saves about USD 0.009 per piece. That is the flat tail of the curve. Beyond a certain volume, you are buying machine capacity, not efficiency. If your annual demand is 30,000 pieces, ordering 200,000 to chase a lower unit price usually destroys more value in inventory carrying cost than it saves.
Why is the first 100 pieces the most expensive?
The first 100 pieces carry the full weight of every fixed cost at once, plus a risk premium. New tooling may need a second iteration. The first article may reveal that the spring takes a set beyond the specified solid height, requiring a free-length adjustment. Load may drift outside tolerance after stress relief, requiring a re-run.
A supplier quoting 100 pieces is not just amortizing setup — it is pricing the possibility that the job needs two setups instead of one. That is why the jump from 100 to 500 pieces often cuts unit price by 70–80%, while the jump from 50,000 to 100,000 might cut it by 10%.
The prototype paradox
Engineers often ask for 50 pieces for bench testing and expect prototype pricing to be a preview of production pricing. It is not. Prototype pricing reflects one-off setup; production pricing reflects a running machine. If you need a genuine production price signal, ask your supplier for a price at 5,000 and 50,000 pieces alongside the prototype quote. The ratio between them tells you how much of your prototype cost is fixed.
Does material choice change spring MOQ?
Yes, and often more than geometry does. Exotic or specialty alloys carry higher mill minimums and longer lead times, which pushes MOQ up.
| Material | Typical mill minimum | Relative MOQ pressure | Notes |
|---|---|---|---|
| Music wire (ASTM A228) | Low, widely stocked | Low | Best availability, cheapest small orders |
| Stainless 302/304 | Low to moderate | Low | Common for corrosion resistance |
| Phosphor bronze | Moderate | Moderate | See phosphor bronze springs |
| Beryllium copper | Higher | High | Often sold in larger lots |
| Inconel / Nimonic | High | Very high | Mill lot may be 10–25 kg |
| Titanium | High | Very high | Long lead, limited sizes |
If your design allows a switch from a specialty alloy to 302 stainless, MOQ can drop sharply. That trade-off is worth testing early, before tooling is committed.
Can you reduce MOQ without paying a premium?
Sometimes. There are four legitimate levers.
1. Accept a stock or near-stock design
If your spring matches a catalog size in wire diameter, OD and free length, the supplier may already have wire on the floor and a proven setup. MOQ can drop to a few hundred pieces.
2. Share a setup with a family of parts
If you have three spring variants that differ only in free length, a supplier can often run them back-to-back on one setup with minor adjustment. The setup cost is shared, and MOQ per variant falls.
3. Buy a blanket order with scheduled releases
Commit to 20,000 pieces annually but take delivery in four releases of 5,000. The supplier buys wire once and runs one setup, then schedules releases. You get near-volume pricing with staged cash flow. This is the single most effective MOQ-reduction tool for B2B buyers.
4. Relax a non-critical tolerance
A free-length tolerance of ±0.5 mm versus ±0.15 mm can change the process from "coil, measure, adjust, re-coil" to "coil and go." Loosening one non-critical dimension frequently cuts both setup time and MOQ. Review which tolerances actually matter to your assembly — see spring design considerations for where to hold tight and where to relax.
What should buyers ask for in a spring quote?
A good spring quote is not a single number. Ask for these line items so you can see where your money goes and negotiate intelligently.
- Unit price at 500, 5,000 and 50,000 pieces
- Setup or tooling charge, stated separately
- Wire minimum purchase and whether unused wire is billed or held
- First-article inspection charge
- Secondary operation charges (grinding, stress relief, plating)
- Lead time for first article and for production
- MOQ per variant and per material
When you can see the setup charge separately, you can decide whether to pay it once on a larger order or absorb it repeatedly on small ones. For extension and torsion parts, the same logic applies — see extension springs and torsion springs for how leg and hook geometry add their own setup steps.
A note on tooling ownership
For most compression, extension and torsion springs, there is no hard tooling — the "tooling" is setup time and sometimes a custom mandrel or pitch tool. Ask whether any physical tooling is created and who owns it. If a custom mandrel is made for your part, you should own it or at least have it reserved for your part number.
How does BQUQ handle small spring orders?
BQUQ runs four production lines in one Dongguan factory covering CNC machining to ±0.005 mm, metal stamping, custom springs and heat sinks, under ISO9001. For springs, we keep MOQ flexible because we know prototype and pilot volumes matter to engineers. We quote in 12 working hours. We will tell you plainly when a small order is carrying a fixed-cost premium and what volume would remove it — that is more useful than a single inflated number. Where a design can be adjusted to share a setup or use a more available wire, we will say so.
Frequently Asked Questions
Q: What is a typical MOQ for custom springs?
A: It varies by material and complexity, but many custom spring suppliers will accept orders in the range of 100 to 1,000 pieces, with the understanding that unit price is high. BQUQ keeps MOQ flexible and will quote small runs, though the fixed-cost premium is real. For specialty alloys like Inconel, MOQ can rise into the thousands because of mill wire minimums.
Q: Why does the price drop so much between 100 and 10,000 pieces?
A: Because setup, wire minimum, first-article inspection and packaging are fixed costs. At 100 pieces those costs are divided by 100; at 10,000 pieces they are divided by 10,000. The variable cost per piece — material and machine time — barely changes. The drop is amortization, not a discount.
Q: Can I get production pricing on a small order?
A: Only if the fixed costs are genuinely lower. If your spring matches an existing setup and the wire is already in stock, a small order can approach production pricing. Otherwise, the honest answer is no. A blanket order with scheduled releases is the most reliable way to get near-volume pricing at small delivery quantities.
Q: Does a looser tolerance really reduce MOQ?
A: Often, yes. Tight free-length or load tolerances force iterative coiling, measurement and adjustment, which multiplies setup time. Relaxing one non-critical dimension can cut setup enough to lower the economic MOQ. Review which tolerances your assembly actually needs before specifying them.
Q: Is it cheaper to order 200,000 pieces than 50,000?
A: Per piece, slightly — typically a few tenths of a cent to about a cent. But the savings are small compared with the cost of carrying 150,000 extra springs in inventory. Unless your annual demand justifies it, ordering at or near annual usage is usually the better financial decision.
Related Resources
- About BQUQ and our Dongguan factory: /about/
- Compression, torsion and extension spring product pages: /compression-springs/, /torsion-springs/, /extension-custom-springs/
- Industry trends in sourcing and lead times: /industry-dynamics/
- Technical articles on spring design and manufacturing: /bquq-blog/
- Frequently asked questions from buyers: /faq/
- Case studies on cost reduction and design changes: /case/
- Contact the engineering team for a 12-hour quote: /contact/
Authored by the BQUQ Engineering Team. BQUQ (Dongguan) runs CNC machining (±0.005 mm), metal stamping, custom springs, and heat sink production in one ISO9001 factory. Source-direct from Dongguan, China — quote in 12 hours: sc@bquq.com | WhatsApp +86 13713157787 | www.bquq.com
