Controlling drawing
Confirm drawing number, latest approved revision, approval date where applicable, dimensions, tolerances, GD&T, datums, threads, roughness, material, treatment notes and inspection requirements.
Custom CNC Parts Manufactured to Drawing
Custom turned, milled and combined-machining components manufactured from the latest approved drawing, model and project specification for hydraulic and industrial equipment.
Custom CNC parts are project-defined non-standard parts produced from the latest approved files and revision. If a 2D drawing, 3D model, specification, order or sample conflicts, the controlling document must be confirmed before production. Similar appearance does not establish equal material, tolerance, heat treatment, coating or function, and dimensional conformity alone does not validate complete-equipment pressure, load, fatigue, leakage, safety or life. Turning, milling, combined machining and drawing-specified secondary work can be reviewed; this page defines no uniform precision, minimum quantity, material range, lead time or performance.
Custom CNC Part Manufacturing
Wei Xing Machinery reviews made-to-drawing CNC parts as turned, milled, combined-machining or secondary-processed projects. Turned parts commonly contain diameters, bores, steps, shoulders, grooves, threads, tapers and faces. Milled parts commonly contain planes, pockets, slots, hole patterns, mounting faces, bracket forms and profiles. Turn-mill components combine these with drilling, boring, reaming or threading.
Grinding, honing, lapping, EDM, heat treatment, coating, welding, polishing, marking, assembly and cleaning are included only when specified and accepted after capability and order review. A sample may support visible-geometry review but cannot independently establish original dimensions, grade, treatment, hidden geometry, tolerances, function, load, pressure, life or acceptance criteria.
Specifications
Key Specifications
| Product Type | Project-defined, non-standard custom CNC parts manufactured to drawing; not a universal or stocked configuration. |
|---|---|
| Manufacturing Basis | Latest approved drawing and revision, approved 3D model where applicable, approved specifications and deviations, and confirmed purchase-order requirements. |
| Typical Machining Routes | CNC turning, milling, or turn-mill / combined machining selected by geometry and reviewed capability. |
| Document Control | Drawing, model, specification, order, approval date, superseded files, temporary deviations and engineering changes are revision-controlled. |
| Materials | Exact material grade and applicable standard are project-specific; this page does not define one material range. |
| Material Condition | Condition, temper, hardness condition and bar, tube, plate, forging, casting or extrusion form are confirmed. |
| Datums and Tolerances | Drawing-defined units, datum system, dimensions, general tolerance basis and GD&T; no category-wide tolerance applies. |
| Threads and Fits | Full thread designation, gauge or method, mating parts and drawing-defined clearance, transition or interference fits. |
| Surface Requirements | Surface parameter, lay, measurement direction, visual limits and functional surface requirements are confirmed by feature. |
| Heat Treatment | Only when drawing-specified and reviewed for material, hardness scale and range, treatment area, case depth, distortion and documentation. |
| Surface Finish | Material-compatible finish, masking, thickness, final-size basis, appearance and corrosion requirements are order-defined. |
| Secondary Processes | Drawing-specified grinding, honing, lapping, EDM, welding, polishing, marking, assembly or cleaning may be coordinated after review. |
| Inspection Basis | First-piece, in-process, final, sampling or feature-specific full inspection follows the agreed plan; a sample alone cannot define the original design. |
| Traceability Basis | Material certificates, heat records and lot traceability are available when specified and agreed in the order. |
| Prototype / Production Stage | Prototype, first article, pilot batch, production release and repeat order each require stage-specific confirmation. |
| Delivery Scope | Machined part plus only the treatment, records, marking, cleaning, protection, packaging and tests stated in the order. |
| Functional Validation | Part conformity alone does not establish assembly pressure, load, leakage, fatigue, safety, certification or service life; the complete assembly requires validation. |
| Applications | Hydraulic and industrial equipment projects subject to drawing, capability and project review; no universal certification is implied. |
Document Control
Drawing, Model and Revision Control
3D model
An approved model can define nominal geometry, surfaces, complex profiles, assembly position and machining references, but it does not replace drawing notes unless explicitly designated as controlling.
Specifications and order
Confirm model, specification and order revisions plus material, processing, inspection, packaging, documentation and any approved deviation or concession.
Conflict resolution
If 2D, 3D, specification, sample or order information differs, identify the conflict, controlling file and approved correction before work proceeds.
Production must not proceed from mixed or superseded revisions. Superseded files, temporary deviations and engineering changes must remain identifiable.
Design Review
Design Authority and Manufacturability Review
Manufacturability review may identify
- Machining and measurement access, tooling and fixturing space
- Length-to-diameter concerns, thin walls, deep holes and small internal radii
- Conflicting tolerances, deformation, coating allowance and difficult burr removal
- Secondary-process sequence and cost-driving features
Customer approval is required for changes to
- Dimensions, tolerances, materials and hole locations
- Threads, radii, chamfers and edge conditions
- Finishes, heat treatment, coating and functional requirements
A DFM suggestion is not an automatic design change. Wei Xing Machinery does not alter approved design requirements without customer authorization.
Dimensional Control
Datums, Dimensions and Geometric Tolerances
| Control Item | What It Defines | Required Information | Inspection Consideration |
|---|---|---|---|
| Linear dimension | Feature size or location | Units, nominal and tolerance basis | Method matched to access and tolerance |
| Diameter | Shaft, bore or circular size | Size, limits and final condition | Micrometer, bore gauge or agreed method |
| Datum system | Reference frame for control | Primary, secondary, tertiary datum; axis, plane, target, origin or clocking | Simulate the drawing-defined datum; machining, inspection and functional datums may differ |
| Position | Feature location tolerance zone | Controlled feature, datums and material-condition modifier where applicable | Method and process stage defined by plan |
| Flatness | Form of one surface | Controlled surface and zone | Free-state or restrained-state condition where relevant |
| Parallelism | Orientation to datum | Datum and controlled feature | Fixture and datum simulation |
| Perpendicularity | 90-degree orientation to datum | Datum, feature and zone | Access and setup review |
| Roundness | Circular form | Section and controlled feature | Suitable form-measurement method |
| Cylindricity | Whole cylindrical form | Controlled cylindrical surface | Coverage and method appropriate to tolerance |
| Straightness | Line or axis form | Controlled element and condition | Support slender parts appropriately |
| Runout | Variation during rotation | Datum axis and surface; circular or total requirement | Rotation setup and datum alignment |
| Profile | Boundary of line or surface | Basic geometry, datums and zone | Comparison method suited to complex geometry |
The controlling drawing must define units and datums. Unspecified tolerances require customer clarification or an approved general-tolerance basis; shop defaults must not be assumed. Metric/imperial dimensions, threads, finish units, hardness scales, temperatures and coating units must not be rounded or converted without approval. One conforming dimension does not prove the complete stack-up, and features may require reinspection after treatment.
Assembly Interfaces
Fits, Mating Components and Functional Features
Review shaft/bore, pin/bushing, bearing-seat, seal-groove, press, sliding and transition fits; thread engagement; locating shoulders; dowel interfaces; sealing and welding surfaces; fastener-preload interfaces; and assembly clearance. Request applicable mating bore, shaft, thread, seal, bearing, bushing, pin, fastener, fitting, valve, housing, bracket or welded-assembly data.
- A fit cannot be established from one isolated part dimension when the functional stack-up is unknown.
- Coating allowance, heat-treatment distortion, assembly sequence, installed deformation and temperature effects can change the final relationship.
- Critical fits should be reviewed with mating-component and acceptance information; no universal clearance or interference is stated.
Feature Definition
Threads, Holes, Bores and Edge Conditions
Threads
Confirm standard, nominal size, pitch or TPI, internal/external and hand, class, length, usable depth, runout, relief, lead-in, sealing function, mate and gauge or method. Diameter alone cannot identify metric, UN, BSPP, BSPT, NPT or another thread.
Blind and stepped holes
Distinguish total drill, full-diameter, drill-point, usable thread, tap, counterbore, spotface and functional bore depths. Review deep/cross holes for drift, intersection, wall section, chips, internal burrs, cleaning and inspection access.
Hole patterns
Define coordinate or true position, pitch-circle diameter, angular spacing, pattern and datum relationships, orientation, counterbore, countersink, spotface and dowel holes. Inspection must suit the tolerance; a caliper is not sufficient for every pattern.
Edge condition
Separately define functional sharp, sealing, metering, handling, thread-start, intersecting-hole, weld-preparation, press-fit and unspecified edges, including break, chamfer, radius, burr direction/limit and inspection method.
Deburring must not damage a functional edge. A burr-free exterior does not demonstrate acceptable internal intersections, and no universal chamfer or radius applies.
Surface Requirements
Surface Finish and Functional Surfaces
| Surface Type | Possible Function | Information to Confirm | Common Risk |
|---|---|---|---|
| Sealing surface | Seal contact and leakage control | Parameter, lay, direction, waviness, defects and final condition | Marks or coating may affect sealing |
| Sliding surface | Guided relative motion | Roughness, lay, hardness, lubricant and mate | Wear, scoring or unsuitable lay |
| Bearing seat | Bearing location and support | Fit, form, finish, treatment and final size | Treatment distortion or incorrect fit |
| Press-fit surface | Retention by interference | Mating size, final finish, coating and assembly method | Coating or edge condition changes fit |
| Cosmetic surface | Visible appearance | Scratch, dent, tool-mark, discoloration and handling limits | Visual terms without an acceptance standard |
| Weld-preparation area | Joint preparation | Geometry, edge, cleanliness and post-weld machining | Distortion or contamination |
| Coated surface | Corrosion, appearance or other specified function | Coverage, masking, thickness, color and final-size basis | Buildup, exposed base metal or stains |
| Threaded surface | Fastening or drawing-defined sealing | Thread designation, finish, masking and gauge condition | Buildup and damaged starts |
Different surfaces need not share one requirement. A bright, mirror-like or smooth appearance does not replace a measurable specification. Confirm parameter, measurement direction, evaluation length, cutoff/filter when specified, lay, waviness, machining marks and visual limits. Coating changes the final surface; this page specifies no universal Ra value.
Materials
Material Grade, Condition and Traceability
Carbon steel
Confirm exact grade, standard, condition and raw-material form.
Alloy steel
Confirm grade, heat-treatment compatibility, mechanical requirements and supply condition.
Stainless steel
Confirm exact grade, condition, corrosion need, finish and magnetic requirements where relevant.
Aluminum alloy
Confirm grade, temper, raw-material form, dimensional stability and compatible finish.
Copper alloy when specified
Review grade, condition, machinability, function and coating compatibility.
Engineering plastic when specified
Review temperature, creep, moisture absorption, dimensional stability, machining and fit.
Customer-supplied material
Confirm identity, quantity, condition, dimensions, allowance, defects, traceability, scrap, residual return and replacement responsibility.
Other reviewed materials
Capability and compatibility are assessed against approved requirements; not every material is machinable for every project.
Material substitution requires written approval after composition, properties, treatment, machinability, weldability, corrosion, magnetic, temperature, coating, regulatory and availability review. Certificates or heat/lot traceability are available when specified and agreed in the order.
Post-Machining
Heat Treatment, Coating and Secondary Processes
Heat treatment
Through or case hardening, carburizing, nitriding, induction hardening, tempering, annealing, solution treatment, aging or stress relief is considered only when specified. Confirm material, area, scale/range, case depth, allowances, masking, distortion, final grinding, testing and records.
Surface treatment
Suitable projects may specify zinc or zinc-nickel plating, black oxide or phosphate for steel; passivation/polishing for stainless; anodizing, conversion coating or paint for aluminum; or another compatible finish. Confirm area, masking, thickness, thread/seal/contact/weld/press-fit protection, color, appearance, corrosion and documentation.
Secondary processes
Drawing-specified grinding, honing, lapping, wire or sinker EDM, welding, brazing, polishing, laser/mechanical marking, cleaning or assembly can be coordinated after capability, material and order review; not all work is performed in-house.
Confirm whether dimensions control before heat treatment/coating or in final treated condition, plus machining allowance and dimensional compensation. Treatment may distort parts; coating cannot replace correct material or structural design. No standardized hardness, case depth, thickness or salt-spray duration is offered. Welding requires joint, filler, heat input, distortion, post-weld machining, inspection and functional-validation review. EDM requires conductive-material, geometry, recast/heat-affected condition, finish and later-inspection review.
Sample Review
Sample-Based Reverse Review
A sample can help confirm
- Visible geometry and feature layout
- Assembly orientation
- Preliminary manufacturing route
- Quotation assumptions
A sample cannot independently confirm
- Original nominal dimensions or tolerances
- Hidden features, material, heat treatment or coating
- Pressure, load, fatigue, function or acceptance criteria
- Legal design authority
Wear, corrosion, deformation, coating loss, repairs, polishing, grinding, welding distortion, damaged threads, sealing damage or earlier modifications can obscure intent. The customer confirms reproduction authority, approved-sample status, wear restoration, mating data, function/safety responsibility and the final approved drawing.
A worn sample must not be treated automatically as the original design master.
Production Stages
Prototype, First Article and Production Release
| Stage | Primary Purpose | Required Approval | Key Risk |
|---|---|---|---|
| Prototype | Geometry, assembly, process or design review | Agreed prototype acceptance | Process may not represent frozen production |
| First article | Validate agreed dimensions, material, process and documents | Order-defined report/sample scope and customer disposition | Scope is not automatically a full FAI |
| Pilot batch | Pre-production machining, assembly and quality validation | Agreed batch and release criteria | Batch risks may differ from one sample |
| Production release | Manufacture from approved revision, frozen process and agreed plan | Documented release and acceptance basis | Unapproved changes or mixed revisions |
| Repeat order | Recurring manufacture after current review | Latest revision, order, deviation and scope confirmation | Old order data may be obsolete |
Prototype approval does not automatically approve the production process. First-article scope may include a ballooned drawing, dimensional/material/treatment/coating records, sample quantity, methods and deviation list only when ordered; no general PPAP or AS9102 claim is made.
Change Control
Engineering Changes and Repeat Orders
- A newly approved drawing revision supersedes the old revision; mixed files are prohibited.
- Drawing, material, supplier, process, heat-treatment, coating, tooling, inspection or packaging changes require documented review and approval as applicable.
- A temporary deviation identifies feature, measured result, quantity, customer functional assessment, written approval and traceability; concession does not revise the drawing unless the file is formally updated.
- An old purchase order cannot replace review of the new order. Repeat work reconfirms revisions, deviations, availability, treatments, inspection, packaging and past nonconformities or changes.
- Nonconforming conditions follow the agreed quality and approval process; traceability scope is order-defined.
Part Families
Common Custom CNC Part Types
- CNC turned shafts, sleeves, bushings, spacers, collars and pins
- Threaded adapters, plugs, caps and flanged components
- CNC milled blocks, brackets, mounting plates and housings
- Drawing-specific precision bores and weld-preparation components
- Hydraulic support components and valve or cylinder support parts that are not automatically pressure boundaries
- Prototype parts, small-batch replacement parts and recurring production components
- Drawing-specific non-standard machined parts
Available configurations depend on the approved drawing, material, dimensions, machining access, secondary processes, inspection and quantity. These descriptions do not imply stocked parts or direct substitutes.
Process Planning
Neutral Manufacturing-Route Comparison
| Manufacturing Route | Typical Geometry | Main Planning Focus | Information Required |
|---|---|---|---|
| CNC turning | Rotational diameters, bores, shoulders, grooves, threads, tapers and faces | Workholding, datum axis, length-to-diameter, runout and chip control | Drawing, material, diameters, lengths, fits, threads and quantity |
| CNC milling | Planes, pockets, slots, hole patterns, mounting faces, brackets and profiles | Access, setups, datum transfer, thin walls and internal radii | 2D/3D geometry, datums, hole data, finish and edge conditions |
| Turn-mill / combined machining | Rotational and prismatic features on one part | Sequence, clocking, datum relationships and inspection | Complete feature relationships and controlling model/drawing |
| Grinding or precision finishing | Drawing-defined final surfaces, bores or diameters | Allowance, treatment distortion, final datum and finish | Pre/final dimensions, material condition and inspection |
| EDM when specified | Conductive-material features selected after review | Access, recast/heat-affected condition, finish and later operations | Geometry, material, surface and inspection requirements |
| Machining plus welding | Machined features combined with specified joints | Preparation, heat input, distortion, post-weld machining and inspection | Joint, process, filler, boundary and validation requirements |
| Sample-based review | Visible geometry where approved data are incomplete | Wear, hidden data, assumptions and design authority | Sample status, mating data and final approved requirements |
Capabilities
Custom CNC Machining Capabilities
Core machining
CNC turning, milling and suitable turn-mill/combined machining; drilling, tapping, boring, reaming, counterboring, countersinking and spotfacing.
Drawing-defined features
Internal/external threads, grooves, shoulders, slots, pockets, hole patterns, flanges, bores, cross/radial holes and complex profiles.
Finishing operations
Feature-specific deburring, cleaning and marking when ordered.
Inspection scope
Dimensional and thread inspection, plus drawing-specified surface-finish inspection using methods appropriate to feature, datum, access and tolerance.
Coordinated processes
Drawing-specified grinding, heat treatment, coating, EDM or welding may be coordinated after material, capability and order review.
Project review
Each part uses only applicable operations; capacity, process route and acceptance method are confirmed for the actual geometry and quantity.
Deep holes require review of access, drift, straightness, depth, intersection, chips, cleaning, inspection and adjacent walls. Thin walls, long shafts, plates and asymmetric parts require allowance, sequence, stress, fixturing, support and free/restrained inspection review because machining, treatment, welding, coating, clamping and storage may distort them.
Inspection
Quality Control and Inspection Planning
Document and process review
Verify drawing/model consistency, numbers and revisions, material/condition, process plan and datums.
Stage checks
Define first-piece, in-process and final inspection plus sampling or feature-specific full inspection in the agreed scope.
Feature checks
Plan overall dimensions, diameters, bores, threads, hole positions, grooves, shoulders, fits and drawing-specified geometric tolerances.
Condition checks
Include surface finish, hardness or coating only when specified; review appearance, burrs, cleanliness, marking and packaging as ordered.
Records and deviations
Material/treatment records, dimensional reports, retention and revision traceability are supplied when agreed; deviations require approval.
Measurement planning
Calipers, micrometers, bore/height/thread/pin gauges, surface/hardness instruments, optical/profile methods, CMM or fixtures are selected only where appropriate.
Small tolerances require method, gauge resolution, repeatability, reproducibility, part/room temperature, fixturing, datum simulation, operator method and uncertainty review. Machine readout alone does not prove conformity. Functional pressure, leakage, load, torque, flow, fatigue, vibration, temperature or assembly testing is included only when the order defines the method and acceptance.
Delivery Condition
Cleaning, Marking, Packaging and Preservation
Cleaning
May include chip and loose-burr removal, washing, drying, passage cleaning or drawing-specified cleanliness.
Marking
Part number, revision, lot, material heat, serial/orientation or customer-specified marks are applied only when ordered.
Packaging
May include individual, thread or sealing-surface protection, compatible VCI/oil, clean bags, partitions or export packaging.
Preservation boundary
Scope follows the order. Rust preventives must be compatible with later processes and media; no uniform cleanliness level, laser marking or individual package is assumed.
Use Cases
Applications
- Hydraulic equipment and industrial machinery
- Construction, agricultural and material-handling machinery
- Machine tools, automation equipment, fixtures and tooling
- Pump, valve and cylinder support components
- Welded tube and structural assemblies
- OEM equipment and prototype development
- Replacement parts based on verified drawings
- Small-batch non-standard and recurring production components
See related hydraulic valve bodies, valve spools and pistons, hydraulic manifold blocks, hydraulic cylinder parts, welded tube assemblies, hydraulic hose fittings and bulkhead connectors.
Automotive-related projects may be reviewed when drawing, material, traceability, inspection and project-specific requirements are clearly defined.
RFQ Preparation
Information Required for Quotation
โCustom CNC partโ or an appearance photograph is insufficient for an accurate quotation.
- Latest 2D drawing, drawing number, revision and approval status
- Available 3D model and the controlling file if 2D and 3D differ
- Part name, function, mating assembly and critical-to-function/inspection features
- Drawing, dimension, thread, finish, hardness, temperature and coating units
- Material standard, exact grade, condition, raw-material form and customer-supplied scope
- Quantity and prototype, first article, pilot or production stage
- Dimensions, approved general-tolerance basis, GD&T, datums and fits
- Thread, hole/bore, edge-break and burr requirements
- Surface parameter, lay, appearance and functional-surface requirements
- Heat treatment, hardness, coating area, masking and final-size basis
- Grinding/finishing, EDM, welding, assembly and other secondary-process scope
- Marking, cleanliness, corrosion protection and packaging
- Material certificates, traceability and treatment records required
- Inspection frequency, dimensional report and first-article scope
- Functional test method, acceptance criteria and applicable standards
- Delivery location and requested schedule
Responsibility
Engineering and Validation Responsibility
Wei Xing Machinery manufactures from customer-approved drawings, models, specifications, sample information and order requirements. The customer or design authority remains responsible for design, function, material selection, tolerance design, mating relationships, load, pressure and safety. We may provide manufacturability review but do not change the design without approval.
The customer confirms the controlling requirement when 2D, 3D, sample or order data conflict; worn sample dimensions are not automatically original dimensions, and customers should provide only files/models/samples they are entitled to use for manufacturing review. Part dimensional conformity does not validate complete-equipment pressure, load, fatigue, leakage or life.
Certificates, heat treatment, coating, welding, EDM, marking, assembly and testing must be stated in the order. First article, sampling, feature-specific full inspection and functional tests follow the agreed plan. Every deviation needs customer approval; final acceptance follows the approved revision and agreed inspection plan.
FAQ
Frequently Asked Questions
What is a custom CNC part?
A custom CNC part is a project-defined, non-standard turned, milled or combined-machining component manufactured from approved drawings, models, specifications and order requirements.
Which files are required to manufacture a custom CNC part?
At minimum, provide the latest approved 2D drawing and revision. A 3D model is recommended for complex geometry; also confirm material, quantity, tolerances, treatments, inspection and delivery requirements.
What happens if the 2D drawing and 3D model conflict?
Work must pause while the controlling file, conflict location and approved correction are confirmed. The manufacturer must not choose the more convenient requirement.
Can a CNC part be manufactured directly from a sample?
A sample can assist visible-geometry review only. Approved information must confirm material, hidden features, tolerances, wear restoration, heat treatment, coating and function.
Which materials and secondary processes are available?
Materials and secondary processes are reviewed against the drawing, function, machinability, material compatibility and actual capability. Not every material-process combination is suitable.
How are tolerances and inspection requirements determined?
They follow the approved drawing, datums, GD&T, function, quantity and agreed inspection plan. There is no uniform precision for the entire custom CNC parts category.
What is the difference between a prototype, first article and production part?
A prototype supports design or process review; a first article validates the agreed scope; production uses the approved revision and release conditions. Prototype approval does not automatically equal production approval.
What information is required to quote a custom CNC part?
Provide current drawings and revision, available model, function and mating data, exact material and condition, quantity and stage, tolerances/datums, thread and hole details, finishes, treatments, inspection, records, packaging and delivery requirements.
Related Products
Related Products
Send Your Custom CNC Part Drawing for Review
Submit the latest drawing and revision, available 3D model, part function, material, quantity, tolerances, secondary processes, inspection and documentation requirements for manufacturability review and quotation.