Where the Order Is Really Decided
Many custom spring makers recognize the pattern. A large share of the orders that come in are replacements or copies of an existing drawing: same wire, same dimensions, a new PO. Meanwhile, the new design work, the springs for next year's product, often goes to whoever the engineer talked to while the design was still taking shape.
That second group is where the long-term business lives. What I've learned about
manufacturing companies that make engineered components is that the supplier who helps design a part often stays the incumbent when it goes to production. The drawing carries that supplier's input, the tolerances were set in conversation with them, and switching later means requalifying.
The Real Competition Is a Free Calculator
At the design stage, a
custom spring manufacturer usually isn't competing with another custom shop. It's competing with the stock-spring catalogs. Sellers such as Lee Spring and Acxess Spring offer free online spring calculators, big catalogs, and fast shipping. For a design engineer with a deadline, that's where the search often starts.
That's a smart lead-generation tactic, and it works. An engineer who solves the problem with a catalog spring rarely calls a custom shop. An engineer whose problem the catalog can't solve is looking for help, and whoever answers first often gets the job. The same dynamic applies to shops that also do broader
contract manufacturing: the design conversation decides the production relationship.
What a Design Engineer Needs During Development
When the catalog doesn't fit, a design engineer needs a custom manufacturer who can help them get the spring right. That means clear information on:
- Design assistance: whether the shop's engineers will review a design, suggest changes, and help hit the load and space constraints
- Materials, with real specifications, such as ASTM A228 music wire, 302 stainless, or 17-7 PH stainless, and when each makes sense
- Wire size ranges the shop can form
- Spring types: compression, extension, torsion, wire forms, flat springs
- Load and rate tolerances the shop can hold
- Prototyping speed, from drawing to sample springs in hand
- Testing capability, such as load testing and cycle testing
What to Publish to Be the First Call
What I recommend publishing to become the supplier engineers call before the drawing is final:
- A design assistance page that explains what the shop's engineers do in the development stage and how to start that conversation
- Material pages that explain properties and trade-offs in plain terms, not just a list of alloys
- Capability tables: wire diameter ranges by spring type, tolerances, and finishes
- A prototype page with realistic lead times
- Short technical articles on real design problems, like spring set, stress relief, or fitting a spring into a tight envelope
- A clear way to send a sketch or a partial design, not only a finished drawing
Some shops also build their own simple calculators or design checklists. That's worth considering. Engineers already expect them from the catalog sellers.
How Engineering Content Gets Found
A design engineer with a spring problem searches the problem, not the supplier. "Compression spring losing load at temperature." "Torsion spring for a tight space." Some now ask AI tools the same questions.
A custom spring maker that has answered those questions on its own website, in plain language, is the one that shows up. Technical content does double duty: it helps the engineer, and it tells both search engines and AI tools which shop understands that kind of problem.
The Design Conversation Is the Sales Conversation
For a custom spring manufacturer, the sale doesn't start with an RFQ. It starts when an engineer has a problem the catalog can't solve. Be the shop that engineer finds, and the production order often follows.
How Mansfield Can Help
Mansfield Marketing helps custom spring manufacturers publish the design assistance, material, and capability content engineers look for during development, as part of a holistic marketing strategy. Contact Mansfield Marketing to discuss winning design-stage spring work by
requesting a quote or calling us at (713) 936-5557.
