For low-volume bracket manufacturing, the honest comparison is this: CNC sheet metal is the cheapest route for a flat, single-bend bracket at almost any quantity from 1 to 100 units; SLS nylon wins when the geometry is complex or the bracket must be light and non-conductive; and DMLS is only justified when the bracket carries a structural or thermal load that a plastic or a folded sheet cannot. At Layer X we quote the same bracket across all three processes several times a week, and the decision almost never comes down to price alone — it comes down to what the bracket has to survive. This article takes one representative part and costs it three ways, so you can see exactly where each crossover sits.
The reference part: one L-bracket, three processes
To make the comparison concrete, we use a single fictional-but-typical part: an L-shaped mounting bracket roughly 120 × 80 × 60mm, 3mm nominal wall, with four fixing holes, a single 90° bend, and two slotted adjustment features. It is the kind of bracket that appears on machine frames, electronics enclosures, sensor mounts, and antenna assemblies across the Gujarat industrial belt. Nothing about it is exotic — which is precisely why it exposes where each process earns or wastes your money.
We cost it at four quantities — 1, 10, 50 and 100 units — through our three relevant services: CNC sheet metal bending (with laser-cut blanks), SLS nylon 3D printing, and DMLS metal 3D printing. Every process figure below is drawn from our published service specifications, not estimated. We deliberately chose a part that all three processes can physically make — that is the only fair way to compare them. A bracket that must run at 400°C, or one with a fully enclosed internal cavity, would eliminate two of the three before any costing began, and that feasibility screen is always the first question we ask.
Process specifications side by side
Before costing, the raw capability of each route. These are the numbers that decide whether a process can make the part at all — cost only matters once feasibility is settled.
| Attribute | CNC Sheet Metal (+ laser) | SLS Nylon | DMLS Metal |
|---|---|---|---|
| Price from | ₹500 per setup (bending) + ₹300 per metre cut | ₹1,200 per part | ₹5,000 per part |
| Tolerance | ±0.3° bend angle; ±0.1mm laser profile | ±0.2mm | ±0.1mm (below ±0.05mm post-machined) |
| Lead time | 7–14 days | 4–6 days | 5–7 days |
| Key capacity | 160T press force, 3200mm max bend length | No supports, any geometry, isotropic | 250 × 250 × 325mm build volume |
| Core materials | Mild steel, SS 304/316, aluminium 5052/6061 | PA12, PA12-GF, PA12-CF, TPU | 316L SS, 17-4 PH, Ti-6Al-4V, Inconel 625 |
| Best fit | Flat/folded steel or aluminium brackets | Complex, light, non-conductive brackets | Load-bearing or high-temperature brackets |
Where the cost actually lives in each process
The three processes hide their cost in completely different places, and this is the single most important thing to understand before reading any quote.
- CNC sheet metal is setup-dominated. The cost is front-loaded into laser nesting, press-brake tooling setup and first-article checks. Our bending starts from ₹500 per setup and laser cutting from ₹300 per metre of cut path. Once the machine is set, each additional bracket is cheap — so the per-unit price falls sharply as quantity rises. This is why sheet metal is the classic low-to-mid volume winner.
- SLS is volume-of-powder-dominated. Cost tracks how much bed space your part occupies, not how complex it is — there are no supports and no tooling. From ₹1,200 per part, the per-unit price barely moves between one part and one hundred, because ten brackets nested in the same build cost almost exactly ten times one. You pay for geometry freedom, not for setup.
- DMLS is machine-time-and-material-dominated. Metal powder, inert-atmosphere build time and mandatory CMM inspection make it the most expensive per part, from ₹5,000. It does not become cheap at quantity the way sheet metal does — the powder bed and laser hours are largely fixed per part.
Costing the bracket from 1 to 100 units
Reading those cost structures against our reference bracket produces a clear picture at each break point.
Quantity 1 — the prototype
At a single unit, sheet metal's setup cost is spread across one part, so its apparent unit price is at its highest. SLS, with no setup at all, is frequently the cheapest way to hold one bracket in your hand — and its 4–6 day lead time is the fastest of the three. DMLS is the dearest but the only option if that single prototype must be tested under real structural or thermal load. Winner at qty 1: SLS for form-and-fit prototypes; DMLS only if the prototype must be functionally metal.
Quantity 10 — the pilot batch
By ten units, sheet metal's setup is amortised across the batch and its per-unit cost drops steeply, closing the gap with SLS for a simple folded bracket. SLS holds roughly flat. DMLS remains an order of magnitude above both. Winner at qty 10: CNC sheet metal for a foldable steel/aluminium bracket; SLS if the geometry cannot be folded from flat stock.
Quantity 50–100 — the production run
This is where sheet metal pulls decisively ahead for any bracket that is essentially a cut-and-folded blank. The one-time setup is now trivial per part, and single-source laser-plus-brake keeps handling costs down because the blank never leaves our facility — no inter-supplier freight, no second inspection queue, no drawing re-interpretation between the cutter and the brake. SLS stays linear and competitive only where its geometry advantage is genuinely needed; at 100 identical simple brackets you are paying a hundred times the powder with none of sheet metal's setup dilution. DMLS at these volumes is reserved strictly for parts whose duty cycle forbids plastic or folded sheet. Winner at qty 50–100: CNC sheet metal, comfortably, unless material properties force your hand.
The pattern across all four break points is consistent: sheet metal's curve slopes steeply downward with quantity, SLS runs almost flat, and DMLS sits high and flat. Wherever the sheet-metal curve dips below the SLS line — typically somewhere between qty 5 and qty 15 for a simple bracket — is your crossover, and it moves earlier the simpler and larger the part.
When to override the cost winner
Price picks the default; requirements override it. A bracket is not just a shape — it is a shape doing a job. Choose against the cheapest option when:
- The geometry cannot be folded. Internal channels, captured hinges, organic topology-optimised webs, or bends the press brake cannot reach rule sheet metal out. SLS prints any geometry with no supports; this is exactly its purpose.
- The bracket is structural or hot. If it carries fatigue load, mounts a rotating mass, or sees temperatures a nylon or aluminium fold will not survive, DMLS in Ti-6Al-4V, 17-4 PH or Inconel 625 is the right answer regardless of unit cost. Our own aerospace antenna bracket case study shows where that premium is justified.
- Weight and electrical isolation matter. A PA12-CF SLS bracket is dramatically lighter than steel and non-conductive — ideal for drones, antennas and instrumentation where a metal fold would add mass or short a circuit.
- Tolerance is tight on a mating face. DMLS holds ±0.1mm and can be post-machined below ±0.05mm; laser profiles hold ±0.1mm but the bend adds ±0.3° of angular variation that stacks across long flanges.
The crossover into hard tooling
All three processes above are low-volume processes. If your bracket forecast climbs past roughly 1,000 identical simple parts, the economics change again: injection moulding or progressive-die stamping begins to beat additive on unit cost, because tooling amortises. As our SLS service notes, SLS is the right choice for 1–500 parts before mould-tooling investment makes sense, with injection moulding becoming cost-effective above around 1,000 identical parts for simple geometry. For a folded steel bracket, dedicated stamping tooling has a similar crossover logic. Below those thresholds — which covers the overwhelming majority of Indian industrial bracket demand — the three processes compared here are the correct field.
How Layer X quotes it
We hold ISO 9001:2015 across all three routes, with AS9100 Rev D and ISO 13485:2016 on our metal and precision work, and every process runs to documented general-tolerance discipline in the spirit of ISO 2768 and the ASTM additive standards. Our overall dimensional capability reaches ±50µm on critical features, with a 99.4% first-pass yield across more than 2,000 parts shipped to 240+ active clients from our single Ahmedabad facility. When you send us a bracket, we do not push you toward the process with the fattest margin — we cost it honestly across sheet metal, SLS and DMLS and tell you where the crossover sits for your exact quantity and duty. For deeper reading on cost drivers, see our guide on reducing manufacturing costs in India and our breakdown of lead times by process.
Not sure which process your bracket belongs in? Upload your CAD file for a 24-hour quote and we will cost it across all three routes — sheet metal, SLS and DMLS — with the crossover point for your quantity spelled out, so you buy the right process rather than the loudest one.