What to send for an accurate quote
To price a part properly we need to see the part. The fastest route is a 3D file plus a drawing, but we can start from less and tell you what is missing.
- 3D file — STEP or IGES preferred; SolidWorks (.sldprt) and Inventor (.ipt) are also accepted
- 2D drawing — DWG or DXF, or a dimensioned PDF. This is what tells us which dimensions actually matter
- Material and grade — for example stainless steel 304, aluminium 6061, cold rolled steel
- Quantity — a single prototype and a 10,000-piece run are quoted on different routes
- Surface finish — as machined, zinc plating, powder coating, anodising, passivation, brushing
- Tolerances that matter — the drawing’s general tolerance is enough unless a feature is critical
- Anything else that affects the part — assembly relationships, marking, packaging, inspection documents your quality system needs
If a file is too large to upload, email it to manager@bjjcen.com and it will be attached to the same enquiry.
What happens after you send it
Within 24 hours you receive three things together: a price, a lead time, and a DFM review. The DFM review is the part most suppliers leave out. Our engineers read the drawing, identify the details that raise cost or cause defects, and feed them back before production rather than after delivery — which is the difference between a revision and a rejection.
Nothing is charged for quoting, and there is no obligation to order.
Key facts you can rely on before you ask
| Quotation turnaround | Within 24 hours, including DFM review |
| Minimum order quantity | None — from 1 part to 100,000+ |
| Sample lead time | 7 days typical |
| Production lead time | 20–30 business days after sample approval, plus tooling time before the run |
| Machining tolerance | ±0.005 mm on features that require it |
| Formed sheet tolerance | Approximately ±0.1 mm, tighter where the drawing specifies it |
| Laser cutting | 12,000 W fibre laser, approximately ±0.05 mm on a cut profile |
| Inspection | CMM with a stated measuring accuracy of ±0.002 mm; 100% of critical dimensions verified |
| Quality system | ISO 9001:2015, registration 34025Q30296R0S |
| Materials | Stainless steel 304 and 316, aluminium 5052 and 6061, cold rolled and hot rolled steel, copper, brass |
| Plant | 15,000 m² in Nanpi County, Hebei; six production lines; 85 skilled staff |
| Payment | 50% deposit before production, 50% before shipment; net-30 available for repeat customers |
| Shipping | Air express 3–7 days; sea freight 15–30 days |
Why there is no minimum order quantity
Most fabricators set a minimum because a small order is awkward to schedule. We keep prototypes and production work in the same plant, on the same inspection regime, so a single test-fit part is normal work rather than an exception. What you receive for one part is what you receive for ten thousand: the same drawing review, the same first-article inspection, the same dimensional report.
That matters at the start of a project. The cheapest place to find an error in a design is on one prototype, and the most expensive place is in a production run.
From enquiry to delivery
The route is deliberately short. You send the drawing; we quote with a DFM review; you approve a sample if the part is new; production runs 20–30 business days after approval; inspection documents ship with the parts. A dedicated project engineer stays as your single point of contact from quotation through delivery, so you are not re-explaining the job to a new person at each stage.
Production happens at our own plant in Nanpi County, Hebei — we do not broker your job to a factory you never see. Laser cutting, bending, stamping, deep drawing, machining, welding, finishing and assembly all run under one roof, which is why one order can combine several processes without three suppliers and three sets of tolerances that have to agree at assembly.
Frequently asked questions about getting a quote
How long does a quotation take?
Within 24 hours. You receive the price, the lead time and a DFM review together, so the first reply is something you can act on rather than a request for more information.
Can you quote from a drawing only, without a 3D model?
Yes. Send a dimensioned DWG, DXF or PDF and we will quote from it. If a feature is ambiguous we will ask before pricing rather than assume, because an assumption that turns out wrong is expensive for both sides.
Do I have to order if I ask for a quote?
No. Quoting is free and carries no obligation. If we think your part is better made elsewhere — wrong process, wrong material, quantity that makes no economic sense — we will say so.
Can one enquiry cover several different parts?
Yes, and it is usually the better way to buy. Send all the drawings you want quoted and the process route is confirmed for each part, with everything quoted together so you can compare it on one sheet.
Related pages
- CAD file formats we accept — the formats and what each is good for
- Minimum order quantity — why there is none
- Tolerances by process — the numbers behind the table above
- Sample lead time — what 7 days typical means in practice
- Quality control and inspection — what ships with an order
- Equipment and capacity — the machines that hold the tolerances