Hengsheng PrecisionPrecision machining Request a quote

How we work: quote, first article, batch, dispatch

The same engineering team that quotes your part owns it through inspection and shipping. Here is the sequence, the evidence at each step, and the terms we ship on.

4-hour quotes3–7 day prototypesEXW to DDP
01

Five steps, no handoffs

Upload and reviewDay 0

Send STEP or IGES plus a 2D drawing, with quantity, material and finish. Without a drawing, the engineering team works from a sample, a sketch or photographs and builds the model first, confirming it with you before any metal is cut.

Quote with DFM notes4–48 hours

Standard parts are quoted within four working hours; complex assemblies within 48. The reply includes the manufacturability review: walls that will distort, threads that will pull out, tolerances that cannot be held in the quoted process, and where a design change would save money.

Prototype and first article3–7 working days

Parts, a dimensional report against the drawing's callouts, material certificate and photographs. Approval is explicit: the sample is either accepted or the process changes and it runs again.

Batch production7–25 days

Small batches 7–15 days, volume 15–25 days depending on quantity and finishing. First article, in-process patrol inspection and final inspection to AQL or 100% on critical parts.

Finish, assemble, shipPer order

Finishing and light assembly under the same order, then packing to protect finished surfaces. DHL, FedEx, UPS, TNT, air or sea, on EXW, FOB, CIF, DDU or DDP terms.

02

How quality is evidenced

Quality here is a closed loop rather than a certificate on a wall: incoming material inspection, first article approval before the batch is released, patrol inspection during production, and final inspection before packing. A nonconforming part stops the line rather than being sorted out later.

For programmes that need a documented submission, the dimensional report is built around the dimensions that affect function, and customer templates are accepted. A forty-page layout of every dimension on a bracket helps nobody; the bearing bore position is what the assembly feels.

Inspection equipment on site
EquipmentUsed for
Coordinate measuring machinePosition, profile, GD&T
2D vision measurementContours, hole patterns, small features
Micrometers and height gaugesShop-floor dimensional checks
Surface roughness testerRa on sealing and sliding faces
Salt spray chamberCorrosion verification after finishing
Hardness testerPost heat-treatment verification
03

Documents and terms

What ships with an order
DocumentWhenNotes
Dimensional reportEvery batch on requestCustomer template accepted
Mill test certificateOn requestChemistry and mechanical properties, per heat lot
First article reportPrototype and new part numbersBubbled to drawing callouts
Salt spray reportFinishing ordersHours to the specification you name
8D reportOn a quality escapeRoot cause plus corrective action
Packing listEvery shipmentPart number, revision, quantity
Commercial terms
TopicStandard
IncotermsEXW, FOB, CIF, DDU, DDP
Payment50% deposit, balance before dispatch; negotiable for repeat customers
FreightDHL, FedEx, UPS, TNT, air or sea
InspectionSGS, BV, TÜV or your nominated third party
ConfidentialityNDA signed before files are shared, on request
04

Process questions

Do you charge for the quote or the DFM review?

No. Quoting and the manufacturability review are free. Engineering work to build a model from a sample or a sketch is charged, and part of that charge is normally credited against the production order.

What is your real lead time for a first order?

Prototypes run 3–7 working days after drawing approval; small batches 7–15 days; volume 15–25 days. Finishing adds time and is quoted with the parts rather than after.

Can you ship on DDP terms?

Yes, EXW, FOB, CIF, DDU and DDP are all quoted. DDP is usually easiest for a first order because duty and delivery are handled end to end; FOB becomes cheaper once you have your own forwarder.

How do you handle a design change after the first article?

Send the revised model with the change highlighted. We quote the delta: program change, whether the existing fixture can be modified, and whether fresh tooling is needed if the datums moved.

Send a drawing for a quote and DFM review.

STEP, IGES, X_T, PDF or DWG up to 50 MB. Tell us quantity and finish, and the quote comes back with tolerance and process notes, not just a price.

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From the shop notes

Longer answers to the questions these pages raise.