I've spent six years managing tooling and maintenance procurement for a 58-person machining shop. I manage roughly $180,000 a year in tooling and consumables. Every order goes into a spreadsheet. Every surprise cost gets a row. So when our engineers asked me to compare making custom brackets in-house with Sandvik Coromant tooling against using a custom brackets 3D printing service, I didn't look at one quote. I looked at total cost, lead time, and the stuff nobody puts on the invoice.
Here's the bottom line up front: 3D printing services are the right choice for some jobs, and an expensive mistake for others. The quote is not the cost. The quote is the starting line.
Why this comparison matters
We all know the saying 'unit price is not total cost.' But in practice, I've found that a lot of buyers compare a machine shop quote to a 3D printing quote and stop there. They don't include tooling, setup, inspection, failed parts, or the time spent explaining the print. If you've ever had a $120 bracket turn into a $420 bracket because of supports and rework, you know what I mean.
This is not a brand fan post. I've bought from several tool suppliers over the years. But when I need reliable cutting tools for aluminum brackets, I keep coming back to Sandvik Coromant. The reason isn't the logo. It's the per-part cost.
Dimension 1: True cost per part
Let's use a real example. In January 2025, I requested a quote for 60 aluminum motor-mount brackets. The custom brackets 3D printing service quoted $14.80 per part, with a 5-day lead time. Base total: $888. I'll get to the add-ons in a minute—because there were add-ons.
Then I ran the same job through our CNC, using the program we already had from an old product. Here's the breakdown:
- Material: 6061 aluminum plate — $118
- Tooling: one Sandvik Coromant end mill, amortized over the run — $42
- Machine time and operator: 3.5 hours at $88/hour blended rate — $308
- Deburr and inspection: 1 hour — $55
- Total: $523
Per bracket, that's $8.72. But wait—the program already existed. If we had to write the CAM from scratch, add $180, which makes it $703, or $11.72 per bracket. Still cheaper than the 3D printing service for 60 parts.
Now let's flip it. For 5 brackets, the 3D printing service would cost roughly $74. In-house machining would still need the same deburr and setup steps—about $265. The crossover point in our shop was around 9 parts. Above that, machining with Sandvik Coromant won. Below that, the 3D printing service won.
I don't have hard data on industry-wide crossover points. Based on the 30+ quote comparisons I've tracked since 2021, my sense is 8–20 parts for simple aluminum parts is a useful ballpark.
Dimension conclusion: 3D printing wins for one-offs. Machining wins for anything above your crossover point. That crossover is not a fixed number—it depends on whether you already have the program, the tooling, and the machine time.
Dimension 2: Hidden costs and small orders
The most frustrating part of comparing manufacturing services: hidden costs never show up in the quote. You'd think a quote includes everything, but it doesn't.
For the 3D printing service, the surprise was support removal. Our bracket had an internal slot, and the service added $3.25 per part to remove supports and ream the slot. That turned the $14.80 quote into $18.05. The service also charged a $25 file verification fee. Not a red flag in itself, but it changed the math.
For machining, the hidden cost came from a bad tooling purchase. Last year, I bought a compatible end mill from an online auction. The package had a logo that looked like a distant cousin of the Sandvik Coromant logo. It chipped after 23 parts. The replacement was a genuine Sandvik Coromant end mill. It cost 60% more. It lasted through 80 parts and was still usable. The cheap one cost $1.10 per part. The genuine one cost $0.46 per part. That's the TCO lesson.
I verified the distributor through the Sandvik Coromant official website before ordering. It took five minutes. Five minutes saved me from another counterfeit purchase. If you're buying Sandvik Coromant tooling from a reseller, check the logo and the part number on the official website. Trust me on this one.
Now, small orders. The 3D printing service had no minimum quantity, and they treated our 3-part order with respect. That matters. When I was building a supplier list for a side project, the vendors who took my $200 order seriously are the ones I trust with $20,000 orders today. Small is not unimportant. It's potential.
Dimension conclusion: Both options hide costs, but in different places. 3D printing hides costs in geometry and verification fees. Machining hides costs in tooling quality and setup time. The answer is to ask better questions before quoting.
Dimension 3: Lead time, and the scan-print myth
Lead time is where the in-house option surprised me. In Q3 2024, we had a machine downtime and needed a custom bracket to reattach a sensor mount. The 3D printing service quoted 5 business days. We made the bracket in-house in 2 hours because the CNC was already set up and the Sandvik Coromant tooling was in a drawer.
That's not a fair comparison in every situation. If the machine is loaded with production work, in-house lead time can be two weeks. The outsourced service can be faster. But for rush parts, existing equipment changes the equation.
And before you go down the scanning path: can 3D printers scan objects? No. A 3D printer can't scan anything. It only prints an existing file. If you need a bracket reverse-engineered, you need a 3D scanner and CAD work. I actually made this mistake early on—asked a 3D printing service to scan and print a bracket, assuming it was one step. It's two separate services, and the scanning is usually the harder part. Honest answer: I'm not sure why the industry makes this so confusing. It's kinda like they want you to think scan-to-print is one click. My best guess is that scan-to-print sounds simpler than reverse engineering plus additive manufacturing.
Dimension conclusion: In-house machining wins when the machine is free and the program exists. 3D printing wins when the machine is busy or the part is needed once. Scanning is not part of the 3D printing process unless you pay for it separately.
What about a Class 1 laser cutter?
Since we're comparing ways to make brackets, I should mention lasers. I almost bought a Class 1 laser cutter last year. The machine was $4,800, and I was on the fence for two weeks. Then I built the same total-cost spreadsheet I use for everything else.
The machine needed air assist, a chiller, exhaust ducting, and a rotary attachment if I wanted to cut round tube. Add consumables and operator time. My estimate came to $38 per cutting hour. The job I wanted to run would take 14 hours. That's $532 in operating cost alone. A local shop quoted $310 for the same cuts. I didn't buy the laser.
Dodged a bullet. The laser cutter wasn't a bad machine. It was a bad match for our volume. If you cut thin sheet metal every day, a Class 1 laser cutter might be a no-brainer. But don't compare the sticker price to a service quote. Compare the all-in cost per part.
Dimension conclusion: A Class 1 laser cutter can be the right tool for the right shop. For us, the crossover point was far beyond our actual workload.
Decision guide: What I'd do next time
- One bracket, no CNC program, weird geometry: Use a custom brackets 3D printing service. It's cheaper and faster, and you won't burn 3 hours of setup.
- 10+ brackets, existing program, genuine tooling available: Machine in-house with Sandvik Coromant. You'll win on per-part cost and repeatability.
- Sheet metal brackets in volume: Consider a Class 1 laser cutter, but only after calculating operating cost per hour.
- Any tooling purchase: Verify the distributor and logo via the Sandvik Coromant official website. I do not buy tooling on logo alone. Counterfeit tooling is the most expensive discount you'll ever buy.
This isn't a universal answer. My approach is simple: collect your own numbers, find your own crossover, and don't let a quote be the only row in your spreadsheet.
If you've managed a similar comparison, I'd love to hear how your crossover point compared to mine. I'm still collecting data.
