FAQ

According to your design, SJ-MFG serves almost all industries and can manufacture most parts from 2D to 5-Axis 3D CNC parts.

Yes, we will provide a quotation within 24 hours after receiving your drawings, and also offer a manufacturing feasibility plan and suggestions.

We support step, iges, STP, stl (for 3D printing only); dwg, pdf, dxf (for 2D only).

Yes, we welcome customer visits! Our company in China, Shenzhen. Please schedule in advance so we can arrange a tour and technical discussion. And we can recommend hotel accommodations and transportation routes for you.

Absolutely. Our engineering team can provide suggestions to reduce cost and improve manufacturability.

Yes, you can still get a quotation without a 3D file. We can quote according to 2D PDF/DWG/DXF drawings. Or hand sketches (with measurements), sample photos + key dimensions, Physical samples (you can send us), we can do reverse engineering.

Definitely. We recommend approving a pre-production sample or small batch to customer before moving to full production, so that the customers can receive the samples for checking the dimensions and conducting assembly testing.

Depending on the overall size of the part as well as the machining process required, SJ-MFG can achieve linear tolerances down to +/-0.01MM and accommodate localized tolerances down to a span of 0.005MM.

We offer over 50 materials with a wide range of materials, we process aluminum, stainless steel, carbon steel, copper, brass, titanium, plastics (PA, PEEK, ABS, POM, PC, etc.), and more.

Yes, we offer a variety of finishing options, such as powder coating, sandblasting, anodizing, polishing, plating and more. According to the customer's requirements, more or special surface treatments can be provided.

Yes, SJ-MFG has no minimum order quantity and samples can be arranged prior to committing to a larger order. Our MOQ is 1, from rapid prototyping to mass production service.

Yes, SJ-MFG has no minimum order quantity and samples can be arranged prior to committing to a larger order. Our MOQ is 1, from rapid prototyping to mass production service.

Yes, SJ-MFG has capabilities up to 5-Axis CNC milling as well as 3D printing in plastics and metals, which covers even the most complex of designs.

We can serve industries such as machinery, aerospace, healthcare, electronics and electrical appliances, automobiles, agricultural machinery, etc.! No matter the industry, if you have a design file we’re likely to make it.

SJ-MFG is a factory that specializes in "customized processing of CNC parts", mainly providing CNC solutions; however, according to the different requirements of customers, SJ-MFG can also offer other services, such as surface treatment services, welding and assembly services.

Yes. We can provide assembly and testing services for our customers according to their assembly drawings or requirements, including the assembly of CNC parts, gears and other hardware components.

SJ-MFG is a supplier that specializes in custom-producing CNC parts for foreign customers, SJ-MFG can also deliver the parts to customers via international courier services such as DHL, FedEx, and UPS.

Of course, if the customer has any questions regarding the design, materials or production, they can contact us at any time. Our professional engineers will respond to your questions and provide our solutions.

If the customer receives unqualified parts, please contact our corresponding colleague immediately. we will investigate the cause, provide feedback to the customer, and re-make the non-compliant parts for the customer, or negotiate solutions with the customer.

SJ-MFG has its own factory, a professional production technology team and advanced CNC equipment. SJ-MFG provides customers with the best manufacturing solutions to control and reduce production costs. Moreover, SJ-MFG has an experienced engineering team that offers customers prices with significant advantages.

We are ISO 9001 certified. Upon request, we can provide RoHS, material certificates, inspection report, and other compliance documentation depending on your market needs.

Yes absolutely, we would like to sign a Non-Disclosure Agreement to protect your designs and intellectual property.

We mainly offer precision CNC machining services, including CNC milling, CNC turning, 5-axis precision machining. In addition, we can also provide processing services such as Gear customization, Hobbing, sheet metal processing, laser cutting, bending, wire cutting and EDM.

The minimum order quantity is 1 piece, and there is no limit on the maximum order quantity. It will be determined based on the customer's order requirements. Please contact us regarding any special or large orders for preferential pricing.

Rapid prototyping 2-3 working days, low volume manufacturing about 8-10 working days, mass production 15-20 working days. Lead time depends on part complexity and quantity.

Yes, we offer expedited production and shipping services for urgent orders. We can process the components you urgently need first and deliver them to you first. If you have a tight deadline, please let us know your required delivery date when requesting a quote. Our team will assess feasibility and provide the best lead time and cost options.

We perform full in-process and final inspection. Our QC team uses CMMs (Coordinate Measuring Machines), surface roughness testers, 2D projector, and other precision instruments.

Yes. We can provide dimensional inspection reports, material certificates, and surface finish reports as required.

We support Bank transfer, PayPal, Credit card, Western Union etc.

Yes, we provide all necessary export documents including commercial invoice, packing list, and certificate of origin.

We offer custom packaging services based on your specific requirements. Parts are packed with protective materials (EPE, foam, plastic bags) and export-grade cartons or wooden boxes. Labels and barcodes can be customized.

We ship globally via DHL, FedEx, UPS, or by air/sea freight. We also work with your preferred freight forwarder if needed.

Yes, we will provide tracking number once the order has been shipped.