CUSTOM STAINLESS STEEL PARTS · DONGGUAN, CHINA
Drawing-led machining for stainless steel components.
SYD Precision provides stainless steel CNC machining for custom parts made to your drawings. We review the material specification, geometry, surface requirements and inspection needs before production, with support for prototypes and small-batch orders.
Request a Stainless Steel Parts Quote →304 stainless steel · Three-axis machining · Polished finish
PROCESS SELECTION STARTS WITH THE DRAWING
Stainless steel milling and turning
Three-axis CNC milling
CNC milling is used for faces, circular recesses, bores, slots and hole patterns. Mark critical datums, mating surfaces and cosmetic areas so the machining and polishing scope can be reviewed together. For parts with features on several faces, compare setup and access options in our 3-axis vs 5-axis CNC machining guide.
CNC turning
CNC turning can be reviewed for cylindrical parts with diameters, shoulders, grooves, threads and internal bores. Any secondary holes, flats or milled features should be included in the model and drawing.
Prototype and small-batch work
Prototype approval and repeat production may require different inspection and documentation plans. State the quantity, revision and intended use when requesting a quotation.
Stainless steel machining requirements
| Project item | What to specify | Why it matters |
|---|---|---|
| Material | Exact grade and condition (for example 303, 304/304L, 316/316L or 17-4 PH), applicable standard and documentation requirements | The exact material requirement must be confirmed before production. |
| Part geometry | 3D model plus a drawing with datums, fits, threads and critical dimensions | The model defines geometry while the drawing identifies functional requirements. |
| Surface requirement | Polished or as-machined areas, appearance direction and protected features | Polishing can affect edges and visible surfaces, so the required scope should be clear. |
| Inspection | Critical dimensions, sampling plan and requested report format | The inspection plan should match the functional risk of the part. |
Stainless steel work hardens during cutting, making tool condition, heat control and stable workholding important. We review tool access, feature depth and the sequence between machining and finishing before confirming the route. For material selection, read our 304 vs 316 stainless steel CNC machining guide.
MATERIAL SELECTION
Common stainless steel grades to specify
The exact grade should match the service environment, strength, corrosion resistance, finishing and documentation requirements. The options below are common RFQ references; availability and the complete manufacturing route are confirmed after drawing review.
| Grade | Selection note | What to include in the RFQ |
|---|---|---|
| 303 | Often considered when improved machinability is important. Confirm corrosion and finishing requirements. | Applicable standard, condition and any appearance requirement. |
| 304 / 304L | A general-purpose option for corrosion-resistant machined parts and polished components. | Exact grade, condition, finish areas and documentation requirements. |
| 316 / 316L | Often selected when the service environment requires greater corrosion resistance, including chloride exposure. | Service environment, exact grade and any material records. |
| 17-4 PH | A precipitation-hardening grade used when strength and hardness requirements are important. | Required condition, hardness, heat treatment and inspection requirements. |
Grade selection should follow the customer specification and design environment. SYD Precision confirms machinability, material sourcing, finishing and inspection scope after reviewing the controlled drawing and model.
STAINLESS STEEL MACHINING CASE
304 Stainless Steel Three-Axis Machining
This documented batch shows circular recesses, bores, holes and slots machined in 304 stainless steel, followed by polishing. The project page uses real production photos and does not add unconfirmed tolerance or quantity claims.
View the 304 Machining Case →Polishing and dimensional inspection
For polished components, identify the visible surfaces, required appearance and any areas that must retain controlled geometry. Edge breaks, recessed features and the relationship between cosmetic and functional surfaces should be agreed before work begins. Review our materials and surface finishes guide when preparing the finish specification.
Critical bores, hole patterns and mating features can be included in the dimensional review. See our CNC machining tolerances and inspection guide and quality and inspection approach when CMM inspection or a measurement report is required.
PREPARE A CLEAR REQUEST
What to send for a stainless steel CNC quote
Drawings and models
Send a PDF drawing together with the available STEP or other 3D model. Identify the revision and avoid leaving functional requirements only in an email.
Material and finish
State the exact stainless steel grade and condition, such as 303, 304/304L, 316/316L or 17-4 PH where applicable. Mark polished areas and describe the intended appearance without relying only on a reference photo.
Quantity and inspection
Provide the prototype or batch quantity, critical dimensions and any inspection documentation needed with the order.
For low-volume programs, review our small-batch CNC machining service. If your part combines milled and turned features, send the complete model so the full process can be reviewed.
Stainless steel CNC machining questions
Can you machine 304 stainless steel?
Yes. Our published case documents 304 stainless steel parts produced with three-axis CNC machining and polishing.
Can polished surfaces and critical dimensions be reviewed together?
Yes, when the drawing clearly separates cosmetic surfaces from functional features and states when dimensions apply in relation to finishing.
Do you accept prototype and small-batch enquiries?
Yes. Include the required quantity and revision so the machining, finishing and inspection scope can be reviewed for that order.
READY FOR A DRAWING REVIEW?
Send your stainless steel part requirements.
Share the drawing, 3D model, material specification, finish, quantity and critical inspection points. We will review the manufacturing scope before quotation.
Request a CNC Machining Quote →