What Actually Drives the Cost of Brass Turned Parts

By CHX Metal Engineering Team · Published 2026-11-02

Brass itself is rarely the expensive part. On small turned fittings, setup, bar utilization and finishing decide most of the price. Our 70 Tsugami machines run brass bar from 1 to 20 mm, minimum order is a single piece, and prototypes take 3-7 days before any production run starts.

One drawing, several quotes, prices all over the map

A buyer in Rotterdam sent us the same brass compression fitting drawing twice last month — once because he wanted a second source, once because the first round had gone badly. He had asked several shops for the same part and the quotes came back spread over more than double. Nothing was wrong with any of the drawings. The spread came from the things the drawing does not say.

What follows is the walkthrough I gave him. It is written from the supplier side, but the point is to let you read a quote and see where the money actually sits, so the second round of quotes is worth comparing.

The material is the small half

Brass is one of the friendlier materials to buy. Free-machining grades such as C36000 (C3604 in the Japanese numbering most Asian suppliers use) or H59 cut fast, hold a good surface without plating, and the chips carry real scrap value — some shops credit that back into the price, others quietly keep it. On a small fitting, the raw bar is usually a minor slice of the unit price. When the number moves, it is rarely the metal.

Where material does cost you money is waste. A part designed so that most of the bar becomes chips pays for metal twice — once to buy it, once to dispose of what is left. We scrapped an entire bar of C3604 early in my time here because a shoulder radius was drawn a fraction too shallow for the insert we had loaded; the whole length came off as short pieces instead of good parts. Since then I read radii on brass drawings before anything else.

Setup is where small orders get expensive

The honest part of any quote is the setup line. Loading collets, proving the program, setting cross tools and a sub-spindle: the work is the same whether the order is a handful of pieces or a container-load. Amortised over a handful, that cost dominates. Over a long run it disappears into rounding.

This is why we kept the minimum order at a single piece instead of pretending there is none. A one-piece order is priced honestly as what it is — mostly setup — and buyers who move into production with us later already know how the shop behaves. If your volumes are large and the part is long and thin, a sliding-head setup with a bar feeder is what makes the per-piece price drop sharply; the machine runs unattended and nobody touches the part until it drops into the bin finished.

The machine behind the price

Two shops can quote the same brass bushing and both be right, because they plan to run it on different machines. A small connector shell with features on both ends might need a second operation on a fixed-head lathe and a separate mill — two fixtures, two chances at tolerance stack, more handling. The same part on a Swiss-type with a sub-spindle is one cycle: done, deburred, in the tray.

We run both routes, deliberately. Of our 220 machines, 70 are Tsugami Swiss-types and the fixed-head lathes take the chunkier work. When you ask us to look at a brass part, the first real decision is which route it belongs on, because the route decides the price far more than the hourly rate does.

Tolerance and finish, priced honestly or hidden

Tight callouts are real money and should be quoted as such. Our standard on critical diameters and bores is ±0.005 mm; anything not marked critical runs to ISO 2768-m, and I would push back on a drawing that specifies five microns on every dimension, because you would be paying for inspection that protects nothing. If a shop quotes a tight-tolerance part at the same price as a loose one, one of the two numbers is wrong, and it is usually the tolerance plan.

Finishing is quieter but real. Brass parts often ship unplated, but nickel or chrome plating, or a cleaning pass for conductive parts, adds a subcontracted step — typically three to seven days — and a new lot to inspect. Ask whether the finish is in-house or outsourced; the answer explains most lead-time surprises.

Getting a quote you can actually compare

Send the drawing with material grade, annual and per-order quantities, and any finish requirement. Say which dimensions are functionally critical and which are just inherited from the CAD template — that one sentence has saved buyers more money than any negotiation. Quotes go back within a working day; prototypes run three to seven days and production seven to fifteen for most brass parts. Terms are EXW Shenzhen only - we are happy to recommend reliable freight forwarders.

If the second round of quotes comes back close together, you will know the market price. If one is much lower, ask what they left out. Somebody always leaves something out.