Get answers to common questions about our CNC machining, 3D printing, injection molding, and sheet metal fabrication services, including capabilities, materials, lead times, and more.
3ERP is a China-based rapid prototyping and low-volume manufacturing partner helping global clients accelerate product development.
Our core services include:
We support projects from concept through production.
All parts are manufactured and shipped from our facilities in China. We combine in-house production with a qualified partner network to ensure flexibility, scalability, and consistent quality.
We operate a full in-house manufacturing setup with nearly 40 sets of CNC machines and inspection equipment, including 3-axis, 4-axis, and 5-axis machining centers, lathes, EDM, grinding machines, and CMM systems.
In addition, our partner network provides access to additional advanced manufacturing capacity when needed.
To get a quote, click the “Get Instant Quote” button and upload your 3D CAD file.
We recommend STEP (.stp) or IGES (.igs) formats for best results. You may also upload ZIP/RAR files containing multiple parts, 2D drawings, or reference images (PDF, PNG, JPG).
Our team will review your files and respond within 24 hours.
Yes. We provide a full range of finishing and secondary processes to meet both functional and cosmetic requirements.
These services are available across CNC machining, injection molding, sheet metal fabrication, and 3D printing.
Yes. First Article Inspection (FAI) is available as part of our quality assurance process for production runs and critical components to ensure dimensional accuracy and compliance before mass production.
We work with companies across a wide range of industries, including robotics, aerospace, automotive, medical devices, consumer electronics, and industrial manufacturing. We support everything from rapid prototyping to low-volume production.
We work with startups, engineering teams, and global manufacturers across multiple industries.
Due to confidentiality agreements, we do not publicly disclose detailed client information, but selected case studies are available upon request.
There is no strict MOQ requirement. We support everything from one-off prototypes to low- and mid-volume production runs.
to ensure consistent process control and traceable production.
Quality is maintained through in-process inspection, final inspection before shipment, and dimensional verification using CMM for critical features.
We also support customer-specific inspection requirements, such as dimensional reports, tolerance-based inspection, and first article inspection when required.
Yes. Our engineering team reviews your 3D CAD files and evaluates key manufacturability factors such as geometry feasibility, tolerances, and production efficiency.
DFM feedback is typically provided during the quotation stage or upon request for more complex parts.
We protect your intellectual property by signing a Non-Disclosure Agreement (NDA) before starting production. If you prefer to use your own NDA template, please send it to us for review and signing.
With over 15 years of CNC machining experience, we have served customers from multiple countries, providing fast and high-precision manufacturing solutions for prototypes and low-volume production (1–1,000 pieces).
As an ISO 9001:2015 certified manufacturer, we offer full in-house CNC capabilities, including 3-axis, 4-axis, and 5-axis machining, turning, milling, and EDM, with strict quality control and CMM inspection.
Our sales engineers provide dedicated support throughout your project, from design review and quotation to production follow-up and final delivery, ensuring smooth communication and reliable results.
We support a wide range of metals and plastics, including aluminum, stainless steel, steel, brass, copper, titanium, ABS, POM, nylon, and PEEK. Please check our materials page.
Delivery lead times depend on part complexity, quantity, and your location. Some parts can be delivered in as little as 3–5 business days.
We offer both standard and precision tolerances depending on part requirements and manufacturing process.
Standard tolerance follows ISO 2768 (medium or fine) and is used by default when no specific tolerances are provided in the drawing. Precision tolerances of up to ±0.01 mm can be achieved for critical features, depending on geometry, material, and machining method.
For more details, please see our guide on CNC Machining Tolerances and Standards.
We prefer STEP (.stp / .step), IGES (.igs), and STL files. 2D drawings (PDF/DWG) are also accepted for reference.
Yes. We provide anodizing, powder coating, polishing, brushing, plating, heat treatment, and other custom finishes based on requirements.
Yes. We have in-house 3-axis, 4-axis, and 5-axis CNC machining centers, including Haas, FANUC, and JingDiao equipment, to produce complex and high-precision parts.
We provide a full range of sheet metal fabrication processes, grouped into three main categories:
We can process sheet metal parts up to approximately 2500 mm × 1250 mm for laser cutting, depending on material type and thickness. For bending and forming processes, the maximum size may be limited by part geometry and forming requirements.
For larger assemblies or oversized parts, we can provide segmented fabrication and welding solutions.
We work with a wide range of commonly used sheet metal materials, including aluminum, brass, stainless steel, carbon steel, copper, and galvanized steel.
We can process sheet metal thickness ranges from 0.5 mm to 20 mm, depending on material and process requirements.
Lead time depends on part complexity and order quantity, typically ranging from a few days to several weeks. Simple prototypes and urgent parts can be delivered in as fast as 5 days.
Yes. We provide in-house assembly services, including welding and mechanical assembly of sheet metal components into complete structures before shipment. We do not offer on-site installation at the destination.
We provide mold tool making, rapid tooling, plastic injection molding, liquid silicone rubber (LSR) molding, as well as overmolding and insert molding for functional and multi-material parts.
We support low order quantities. Orders are accepted from single prototypes to full production runs. Fast delivery is available in as little as 7 business days, depending on project requirements.
We offer a wide range of engineering-grade thermoplastics, elastomers, and fiber-reinforced materials for both prototyping and production, including ABS, PC, PC-ABS, PP, PA (Nylon), POM, PMMA, PE, PET, PBT, PPS, PEI, TPE, and TPV.
We also provide liquid silicone rubber (LSR) molding for flexible parts and can support color matching and rapid tooling with aluminum or steel molds, depending on production requirements.
Yes. We provide in-house mold manufacturing for custom injection molds used in prototyping, short-run, and mass production.
We also support rapid tooling and offer end-to-end services from mold design and DFM review to fabrication and injection molding.
Yes. We support both multi-cavity and family molds for injection molding.
We design and manufacture precision tooling using CNC machining and EDM, with aluminum, soft steel, or hardened steel depending on production volume and requirements.
Rapid tooling for prototypes can be completed in as few as 10 days. Custom injection mold tooling typically takes around 10–15 business days, depending on design complexity, material selection, and part requirements.
Production-grade molds using harder tool steels and requiring higher durability and tighter tolerances may take longer, typically up to 6–10 weeks, depending on tooling specifications and validation requirements.
We offer a full range of 3D printing technologies, including FDM, SLA, SLS, SLM, MJF, PolyJet, Carbon DLS, and metal binder jetting.
Lead time varies depending on part complexity, quantity, and your location. For most regions, 3D printed prototypes can be completed within 3–5 days, with delivery times adjusted based on shipping distance.
We offer a full range of post-processing options, including sanding to remove layer lines, painting (matte, gloss, or custom colors), texturing, labeling, metalizing, and electroplating.
Threaded inserts are generally preferred for stronger, more durable threads, especially for functional or load-bearing parts, while printed threads are suitable for low-stress or prototype applications.
3D printing is a manufacturing process, while rapid prototyping is the application or outcome of quickly producing prototype parts.
3D printing, also known as additive manufacturing, is a manufacturing process that builds parts layer by layer directly from a CAD file, unlike traditional methods such as CNC machining, which remove material from a solid block.
Rapid prototyping, on the other hand, refers to the fast fabrication of prototype parts for design validation and testing, using processes such as 3D printing, CNC machining, injection molding, or urethane casting.
Technically, 3D printed parts can be made in almost any size by producing them in multiple sections and assembling them after printing. With advanced design software, we can create precise interlocking or puzzle-style joints that ensure strong and accurate assembly after printing.
3D printing tolerances typically range from ±0.10 mm to ±0.30 mm, depending on the process, material, and part design. Minimum wall thickness starts from around 0.6 mm for resin printing and 0.8 mm for most industrial processes.
For detailed tolerances, clearances, and design recommendations, see our 3D Printing Design Guidelines.
Yes. We provide worldwide shipping for custom-manufactured parts and work with reliable global carriers to deliver orders to customers around the world.
We offer flexible shipping options based on your location, order size, and delivery requirements, including express services from carriers such as DHL, FedEx, and UPS. Sea and air freight options are also available for larger or bulk shipments.
Shipping times depend on the destination, shipping method, and order requirements. For most standard international express shipments, deliveries to North America and Europe typically take 2–4 days after shipment.
Our sales engineers will follow up on your shipment status and keep you updated throughout the delivery process. We will also remind you to complete customs clearance promptly to help avoid unnecessary delays.
Yes. If you have a preferred courier account or logistics partner, we can arrange shipment using your designated carrier.
Yes. All international shipments include necessary export documents, such as commercial invoices and packing lists, to help ensure smooth customs clearance.
