A manufacturing
partner engineers
actually want to call.
Shenzhen Honyo Prototype Co., Ltd. — known globally as CIFProto — has been making precision parts for product teams since 2010. We built the company we wished existed when we were in your seat: fast, technically literate, and genuinely accountable.
Engineers first.
Suppliers second.
CIFProto was founded in 2010 in Shenzhen — the beating heart of global hardware — by a small team of manufacturing engineers who had spent the previous decade supplying automotive, consumer electronics and medical prototypes inside large OEMs. We'd seen firsthand how much time an engineer's day gets eaten by sourcing: chasing quotes, translating specs, babysitting suppliers, re-explaining the same drawing three times to three different factories.
We built CIFProto to eliminate that friction. One platform, one engineer per project, one quality system across six processes. Our customers range from YC-backed hardware startups pulling all-nighters on their first prototype to Fortune 500 primes shipping flight hardware. What unites them is a preference for working with people who actually understand what they're trying to build.
Today we operate two facilities — our Shenzhen headquarters in Bao'an District and a dedicated injection-molding plant in Dongguan — with a combined 4,000 m² of production space, 40+ CNC centers, 12 industrial 3D printers, and a team of 100+ engineers, machinists and QA specialists. We ship parts to customers in more than 50 countries every month.
Four principles that shape how we work.
Say what we mean.
If your tolerance is aggressive, we tell you. If your wall thickness will warp, we tell you. If we can't hit your deadline, we tell you before you place the PO — not after. Transparency is table stakes.
Own the whole outcome.
One engineer owns your job from quote to shipment. When something goes sideways — and occasionally it will — there's one person with your mobile number and the authority to fix it.
Measure, don't guess.
Every precision batch goes through our Zeiss CMM before it ships. We provide the data. If a dimension drifted, you'll know before your inspector does. Trust is built on verifiable measurements.
Protect what matters.
Your IP is yours. Mutual NDAs are signed before we open a single CAD file on request. Tooling is owned by the customer. Data is stored on encrypted servers, not a shared email account.
The machines behind the parts.
A brief tour of what sits on our shop floor. Full equipment list with spindle speeds, travels and tolerance data is available on request.
CNC Machining
- 3-axis mills (Haas)18
- 4-axis mills8
- 5-axis mills (DMG MORI)6
- CNC lathes10
- Swiss-type (Citizen)4
- Max envelope1200×800×600
Additive Manufacturing
- SLA (Formlabs / industrial)6
- SLS (EOS P-series)3
- MJF (HP 5200)2
- DMLS metal1
- Max print380×284×380
Molding & Fabrication
- Injection presses 50–650 T12
- Vacuum casting chambers4
- Fiber laser cutters (4kW)3
- Press brakes (Amada)5
- Max mold size650 ton
Measurable, auditable, repeatable.
We don't just claim to be quality-focused — we let you audit us. Our Shenzhen facility welcomes customer visits and third-party QA audits by appointment.
In-process inspection
Every CNC setup starts with a first-article inspection. Operators run in-process checks against the drawing every 5th part on tight-tolerance jobs.
Dimensional verification
Final QA uses a Zeiss Contura CMM, Hexagon 3D scanner and Mitutoyo CMM. Reports include deviation maps, GD&T evaluations and photographic evidence.
Material traceability
Every raw material batch is logged. Mill certificates (EN 10204 3.1) are archived and provided on request. Lot-level traceability for regulated industries.
Documentation on delivery
Every shipment includes packing list, inspection report, material certificate (on request) and a signed Certificate of Conformance.
Ready to see if we're a fit?
Upload a CAD file or drop us a note. Senior engineers answer every RFQ personally.