“Metal fabricator” covers a two-person shop with a welder and a brake, and a multi-site plant building thousands of enclosures a year. Both are valuable, but they are good at different things, and picking the wrong kind is the most common reason a fabrication relationship disappoints. Here is how the three broad types differ and how to match one to your work.
Evaluating fabricators for a program or project? Call 601.892.5017 or email collin.t@fabtekindustries.com — send the drawings or scope and we’ll respond fast.
- A job shop builds one-offs and small lots to print, fast and flexibly — ideal for prototypes, repairs, fixtures and short runs, but rarely set up for repeat volume or program management.
- A contract fabricator (contract manufacturer) builds your parts repeatedly under your drawings and quality requirements, with engineering support, retained programs and scheduled releases — the model most OEMs and project buyers need.
- A production fabricator runs dedicated capacity and automated cells for high, steady volume. Many larger shops combine the last two: dedicated lines for programs plus flexible capacity for custom work.
- Job Shop, Contract Manufacturer or Production Fabricator? (you are here)
- Sheet Metal Shop vs. Structural Fabricator
- What Drives the Price of a Fabricated Part
- What to Send With an RFQ
- How to Negotiate a Metal Fabrication Contract
- Counting Handoffs: In-House Finishing & Assembly
- Prototype to Production Without Re-Engineering
- Contract Metal Fabrication in Mississippi & the Gulf South
The three kinds of shop
Job shops take whatever comes through the door: a repair, a fixture, a prototype, fifty brackets. They are built for flexibility — general-purpose machines, skilled people who can read any drawing, short setup — and quote each job on its own. They are the right call when the work is truly one-off.
Contract fabricators build a customer’s parts on an ongoing basis, to the customer’s drawings and specifications, as an extension of the customer’s own manufacturing. What distinguishes them is not the machines but the system around them: engineering that reviews and unfolds your drawings, programs retained by part number so repeat orders don’t start over, revision control, scheduled releases against a blanket order, material traceability, and a quality system your auditors can review. Transformer and switchgear OEMs, EPCs and project buyers mostly need this.
Production fabricators dedicate capacity — sometimes whole lines — to high, steady volume, with automation, fixtures and standard work that drive unit cost down. They need forecasts and commitments to do it, and they are less nimble on one-offs.
Side-by-side comparison
| Job shop | Contract fabricator | Production fabricator | |
|---|---|---|---|
| Typical quantities | 1 to a few dozen | Dozens to thousands, repeating | Thousands, steady |
| Engineering support | Minimal; build to print | DFM review, detailing, flat patterns, revision control | Process and fixture engineering |
| Equipment breadth | General-purpose | Broad: cut, form, weld, machine, finish, assemble | Deep in the processes the product needs |
| Scheduling | Job by job | Blanket orders and releases; reserved capacity | Dedicated lines against forecast |
| Quality system | Varies | Documented (e.g., ISO 9001), traceability, inspection records | Documented, statistical |
| Best for | Prototypes, repairs, one-offs | OEM components, project packages, programs | High-volume standard parts |
How to tell which one you’re talking to
Ask a few questions and the answers sort shops quickly. Do you keep programs and flat patterns by part number? Contract and production shops do; repeat orders shouldn’t be re-engineered. How do you handle a revision? Look for a controlled process, not “we’ll use whatever you send.” What is in house and what goes out? Every outside step adds a vendor and a schedule (see Part 6). How do you plan capacity — can you reserve capacity for a program, and what happens in a surge? (see Vetting a Shop’s Surge Capacity). What does your quality system cover — certifications, weld procedures, traceability, inspection records? Our 10-point vetting guide goes deeper.
Matching the shop to the work
If you need a single prototype this week, a good job shop is hard to beat. If you are an OEM outsourcing cabinets, tanks or housings you will buy again and again, you need a contract fabricator that can hold your drawings, releases and quality requirements over years. If you have a standard part in high, predictable volume, a production cell — at a dedicated production shop or a contract fabricator with dedicated lines — gives the lowest unit cost. Many buyers end up needing a mix, which is why shops that combine contract and production capability with room for custom work are valuable: the prototype, the pilot run and the production release can stay in one place (see Part 7).
Where FabTek fits
FabTek is a contract and production fabricator for power, utility, data center and industrial customers, working from four production sites in Hazlehurst, Mississippi. Cutting, forming, machining, welding, blast, powder coat and assembly are in house (hot-dip galvanizing through long-standing partners), with an engineering team that reviews and details customer drawings and retains programs by part number. FabTek runs reserved-capacity programs for OEMs alongside custom and project work, under ISO 9001:2015 with AWS-certified welding. See the full Capabilities list and how we approach lead times and capacity.
Frequently asked questions
What is the difference between a job shop and a contract fabricator?
A job shop builds one-off and small-lot work job by job to print. A contract fabricator builds a customer's parts on an ongoing basis under the customer's drawings and quality requirements, with engineering support, programs retained by part number, revision control, scheduled releases and traceability.
What is contract metal fabrication?
Contract metal fabrication is outsourcing the manufacture of your fabricated metal parts or assemblies to a fabricator that builds them to your drawings and specifications on a repeat basis, acting as an extension of your own manufacturing.
When should an OEM use a contract fabricator instead of a job shop?
When the parts repeat, when revisions and quality records matter, and when delivery must follow a production schedule. Contract fabricators retain programs, control revisions, reserve capacity and keep traceability, which job shops are not usually set up to do.
What questions should I ask a metal fabricator?
Ask whether they keep programs by part number, how they control revisions, which processes are in house versus outsourced, how they plan and reserve capacity, and what their quality system covers, including certifications, weld procedures, traceability and inspection records.
