At some point, a lot of growing engineering companies start asking the same question:
Should we buy a CNC machine and start making these parts ourselves?
On paper, it can make a lot of sense. You have the machine under your own roof. You control the schedule. Your engineers can walk over to the machine shop and get something changed quickly.
But owning the machine is the easy part.
Running a capable machine shop every day is a completely different story.
The CNC Machine Is Only the Beginning
When companies look at bringing machining in-house, the first thing they usually consider is the cost of the equipment.
A good CNC machining center is obviously a major investment. But the machine itself is only part of what it takes to actually produce good parts.
You also need tooling, workholding, inspection equipment, CAM software, cutting tools, coolant systems, material handling, maintenance, and somebody who knows how to put all of it together.
More importantly, you need good people.
Experienced CNC programmers and machinists are not easy to find, especially here in Silicon Valley. A good machinist is doing a lot more than loading material and pressing cycle start. They are thinking about setups, tooling, cutter engagement, part movement, inspection strategy, and what is going to happen two or three operations later.
That experience takes years to build.
Then there is the question of keeping the machine busy.
If you buy a machine because you need 50 parts this month, what happens next month when you only need five?
The payment, floor space, maintenance, software, tooling, and employee costs are still there.
On the other hand, if three engineering programs suddenly need parts at the same time, one machine can very quickly become the bottleneck everyone was trying to eliminate.
What You Are Really Getting From an Outside Machine Shop
When you outsource CNC machining, you are not simply paying somebody to run a machine.
You are buying access to an entire manufacturing system that already exists.
At Euro Machining, the machines, programming systems, inspection equipment, tooling, fixtures, quality procedures, and people are already in place. Machining parts is not something we do occasionally when another department needs help.
It is what we do every day.
That makes a big difference.
We may be machining a handful of complicated prototype parts in the morning, running a production job in the afternoon, and setting up another job that evening.
Over time, you see a lot of different materials, designs, tolerances, and manufacturing problems.
That experience becomes extremely valuable when something unusual comes across the floor.
A drawing might look straightforward to an engineering team, but an experienced machinist may immediately see a workholding problem, a tolerance stack-up issue, or a feature that is going to become very expensive once production starts.
Sometimes a five-minute conversation before the job starts can save hours of machining later.
Short-Run Manufacturing Is Really About Flexibility
For a lot of our customers, demand is not predictable.
They may need five parts for testing this week, 25 after a design revision next month, and 200 parts once a program gets approved.
That is normal in aerospace, semiconductor, medical, robotics, and other high-tech industries.
This is where outsourcing makes a lot of sense.
Instead of trying to size an internal machine shop around demand that is constantly changing, you can use outside capacity when you actually need it.
If the program slows down, there is no machine sitting idle.
If the program ramps up, you are not suddenly trying to hire another machinist and buy another machining center.
You send the work out and adjust as the program changes.
For engineering groups moving quickly through development, that flexibility is usually worth a lot more than simply having a CNC machine sitting in the building.
Prototype and Production Should Work Together
One thing we see quite often is companies using one source for prototypes and then moving the production work somewhere else.
Sometimes there is a reason for that, but there is also a lot of value in keeping the process together.
When we machine the prototype parts, we start learning the job.
We learn how to hold it.
We learn which tools work best.
We learn which tolerances are difficult to maintain.
We learn where inspection needs additional attention.
By the time that part moves into production, a lot of that work has already been done.
The programming, fixturing, tooling strategy, and inspection process developed during the prototype stage can carry directly into the next order.
That usually means a smoother first article and a much easier production ramp.
For the customer, it also means they are not starting from zero every time the quantity changes.
When Does In-House Machining Make Sense?
There are absolutely situations where bringing machining in-house is the right decision.
If a company has very high and predictable production volumes, makes the same family of parts continuously, and can keep the equipment and employees busy, internal machining may make financial sense.
There are also manufacturing processes where machining is so closely tied to the rest of the production line that separating it would create unnecessary problems.
But that is very different from what we see with most engineering and R&D groups around the Bay Area.
Their needs change constantly.
Prototype quantities become production quantities. Designs change. Programs get delayed. A five-piece order suddenly becomes 100 pieces. Then another project needs something completely different.
Trying to build an internal machine shop around that type of demand can become expensive very quickly.
Use the Capacity When You Need It
For most engineering teams, the question probably should not be:
“Can we machine this ourselves?”
The better question is:
“Is building and operating a machine shop really the best use of our resources?”
If machining is your core business, the answer may be yes.
If your core business is designing semiconductor equipment, aerospace systems, medical devices, robotics, or another technology, it often makes more sense to let a machine shop worry about the machining.
That allows your engineers to stay focused on the product while still having access to the equipment, people, and manufacturing capacity they need when the project is ready to move.
At Euro Machining, we work with engineering teams throughout Silicon Valley and the Bay Area on everything from quick-turn prototype parts to short-run and ongoing production.
If you have a project coming up, send us the drawings. We are always happy to take a look, talk through the manufacturing approach, and see where we can help.
Call us at (408) 845-9300, or learn more about our CNC milling and turning capabilities and quick-turn prototype services.