High-Precision Tool Steel CNC Machined Parts Supplier
Overview
XCM CNC provides tool steel CNC machining focused on precision tolerance limits, full GD&T control, and roughness-grade verification for SKD11, DC53, S136, and P20 parts.
Using imported machines such as DMG 80mono and Mazak I-100S together with Hexagon CMM and TRIMOS 600L inspection, the factory can review feasibility around +/-0.003 mm, roundness around 0.006 mm, and position around 0.015 mm for inserts, locating pins, and wear blocks. The factory runs under ISO 9001 and IATF 16949 systems, with MOQ starting from 1 piece.
Key Capabilities
Machining Parameters and Tolerances
- Materials: SKD11, DC53, S136, P20; grade selected by hardness target and post-heat-treatment finish route
- Tolerance: +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft/bore fits; h6/H7 available
- Surface Finish: Ra 3.2 um milled, Ra 1.6 um fine milled, Ra 0.8 um turned/honed, Ra 0.4 um ground datum faces
- GD&T: Coaxiality 0.012 mm, position 0.015 mm, perpendicularity 0.02 mm/1000 mm, roundness 0.006 mm, runout 0.01 mm
- Max Size: 3-axis milling 3000 x 1600 x 1400 mm; turning diameter 1250 x length 2000 mm
- Heat Treatment: Quenching, tempering, and post-hardening finish sequence by drawing review
- Thread: M1.4 to M220; NPT, BSP, G, PT pipe threads available
- Precision Limit: +/-0.003 mm tolerance, 0.006 mm roundness, 0.015 mm position (specific features, by drawing review)
Full GD&T Precision Limits and Verification on Tool Steel Parts
Tool steel precision projects can be reviewed around 0.012 mm coaxiality, 0.015 mm position, 0.02 mm perpendicularity over 1000 mm, 0.006 mm roundness, and 0.01 mm runout. These values suit locating pins, inserts, and rotating parts where single-clamping datum control is possible. Hexagon CMM verifies those features one by one after the datum and acceptance method are confirmed during drawing review.
Surface Roughness Grading from Ra 3.2 um to Ra 0.4 um
Tool steel surface roughness is usually divided by process route: milled faces around Ra 3.2 um, fine-milled faces around Ra 1.6 um, turned or honed faces around Ra 0.8 um, and ground datum faces around Ra 0.4 um. The lowest roughness grade is usually reserved for precision datums and wear contacts and is achieved after heat treatment through grinding. Roughness checks can be made on every marked face with a dedicated tester.
Precision Bore and Shaft Fits to IT5-Level Review
Fit bores can be reviewed to H7 level, and shaft-bore relationships can be evaluated around +/-0.01 mm, with selected smaller features reviewed to IT5 or IT6. Hole-group position around 0.015 mm is verified on CMM, while bore roundness around 0.006 mm is suited to locating bores and pin holes under about 50 mm diameter. Post-heat-treatment distortion needs stock allowance reserved before final correction.
Narrow Features and Deep Cavities Under Precision Limits
Narrow slots can be reviewed down to about 0.3 mm width, cavities to around 4:1 depth-to-width ratio and up to 5:1 with extended tooling, and minimum inside corner radius around R0.5 mm. At around 40 mm cavity depth, inside radii of R1.0 mm or more are safer because of tool rigidity and chip removal limits. Tight slots are better reviewed around +/-0.005 mm after finish correction because tool wear affects them quickly.
Specifications
| Product Name | High-Precision Tool Steel CNC Machined Parts |
|---|---|
| Manufacturer | XCM CNC |
| Factory Location | Shenzhen, Guangdong, China |
| Quality System | ISO 9001, ISO 13485, IATF 16949, GJB9001C |
| Machining Process | Precision CNC milling, CNC turning, drilling, boring, and finish grinding by drawing review |
| Material | Tool Steel |
| Material Grade | SKD11, DC53, S136, P20 selected by wear life and post-heat-treatment finishing route |
| Tolerance | +/-0.003 mm (+/-0.00012 inch), IT5 or IT6 accuracy, +/-0.01 mm shaft-bore fits; h6-H7 available |
| Precision Tolerance | +/-0.003 mm for selected small precision features after review |
| Surface Roughness | Ra 1.6 um machined fit surfaces, Ra 0.4 um ground datum faces by requirement |
| Surface Treatment | Heat treatment and protective finish by drawing review |
| Inspection | Hexagon CMM, roughness tester, thread gauge, and TRIMOS 600L height-gauge support by order requirement |
| Application | Precision inserts, locating pins, wear blocks, test fixtures, and gauge bases |
| Key Features | Fit bores, wear faces, narrow slots, deep cavities, corner clearance, and grinding allowance |
| Critical QC Requirements | Datum definition, roughness verification, fit-bore inspection, and post-heat-treatment recheck |
| Batch Range | Prototype to repeat precision batches by drawing review |
| MOQ | 1 Piece |
| Typical Lead Time | 10-15 business days after drawing review |
| Drawing Formats | STEP, IGS, DWG, PDF, X_T |
| Heat Treatment | By drawing review |
| Critical Tolerance Control | Datum transfer and finish allowance reviewed before and after heat treatment |
Applications
Precision Punches and Inserts for Stamping Tools
Typical Parts: Precision punch, die insert, forming block
Tool steel suits stamping parts that need hardness, wear resistance, and post-heat-treatment dimensional stability. CNC review should confirm fit surfaces, narrow slots, and edge radii before the finish route is fixed, without turning specific hardness values into default promises.
Locating Pins, Jaws, and Wear Guides for Automation
Typical Parts: Locating pin, gripper jaw, guide wear block
Locating pins and jaws need long-term fit accuracy, and tool steel offers better wear resistance and impact stability than general structural steel for those contact areas. Machining focus stays on bores, flatness, and contact-face roughness, with grinding review added where the datum needs tighter control.
Wear-Resistant Datums and Probe Components for Gauges
Typical Parts: Datum block, probe tip, gauge holder
Gauge parts rely on stable datums and low-wear contact points, and tool steel helps reduce shape drift from repeated checking cycles. CNC machining can focus on locating bores, flatness, and roughness targets, with critical faces reviewed for Ra 0.4 um grinding only where the drawing requires it.
Precision Tooling Parts for Connectors and Semiconductor Fixtures
Typical Parts: Micro stamping insert, test pin holder, precision clamp block
These small parts often combine narrow slots, fine bores, and high-frequency contact surfaces, and tool steel helps maintain wear resistance in compact structures. CNC review should confirm inside corner radius, cavity cleanup, and hole-group position before the final process route is released.
Why Choose Us
System Control Supports Precision Datum and Reinspection Rules
XCM CNC manages precision tool steel work under ISO 9001, ISO 13485, IATF 16949, and GJB9001C systems across equipment from DMG, Mazak, Matsuura, Brother, and other brands. For tight-tolerance parts, that helps keep datum definitions, finish nodes, and reinspection rules aligned in one process.
Size Coverage Helps Confirm Stability and Finish Strategy Early
Three-axis travel reaches 3000 x 1600 x 1400 mm and turning diameter reaches 1250 mm. For inserts, locating pins, and tooling bases, that range makes it easier to confirm dimensional stability and finish strategy before the route moves into production.
Tiered Equipment Strategy for Cost and Precision
XCM CNC uses CNC resources from mainland China, Taiwan, Japan, and Europe or the US. Lower-tolerance operations can run on domestic or Taiwan machines, while tighter features move to imported platforms such as DMG or Mazak so equipment cost tracks actual accuracy demand.
Inspection Equipment Matches Precision Verification Needs
GD&T and fit tolerances can be checked on Hexagon CMM, roughness on a dedicated tester, and height or flatness on TRIMOS 600L. The measurement datum and acceptance method are confirmed during drawing review so each critical feature can be verified against the same reference system.
Post-Heat-Treatment Finish and Reinspection Stay Connected
Tool steel dimensions often shift after quenching, so finish allowance and reinspection points need to be fixed before machining begins. Fit bores, wear faces, and locating datums can then be restored after heat treatment and checked back against the first-article target.
FAQ
What tolerance can you hold for high-precision tool steel CNC parts?
Selected small precision features can be reviewed around +/-0.003 mm, with IT5 or IT6 level possible where the grade, structure, and finish route support it. Final tolerance still depends on material, heat-treatment order, geometry, and inspection method.
How do you manage machining before and after heat treatment on tool steel precision parts?
The usual approach is to confirm rough-machining allowance, heat-treatment order, and finish locations before the final route is locked. For inserts, locating pins, and wear blocks, that sequence has a direct effect on dimensional stability and achievable accuracy.
Can you hold H7 or H8 bores on tool steel inserts and fixtures?
Yes, H7 or H8 bores can be reviewed where the structure, heat-treatment state, fixturing, and inspection method support them. Hole-group position can also be reviewed around 0.015 mm, but the final result still depends on part size and process route.
How do you manage grinding allowance on tool steel wear surfaces?
High-hardness wear faces usually need grinding allowance confirmed before heat treatment so finish correction can restore accuracy later. Ground roughness around Ra 0.4 um can be reviewed where the drawing requires it, but the actual allowance still depends on grade, hardness target, and surface function.
What slot width or inside-corner limits should I consider on tool steel parts?
Narrow slots can be reviewed down to about 0.3 mm, minimum inside corners around R0.5 mm, and cavities around 4:1 depth-to-width ratio, or about 5:1 with extended tooling. Deeper cavities near 40 mm are safer when the inside radius is opened to R1.0 mm or more.
What inspection equipment do you use for precision tool steel parts?
Main inspection uses Hexagon CMM for coordinate checks, a dedicated roughness tester for Ra verification, and TRIMOS 600L for height and flatness support. Optical measurement can also help with small-hole position checks where the drawing requires it.
Request a CNC Machining Quote from XCM CNC
Send us your drawings. Our team will review the file and reply with a machining quote. MOQ: 1 piece, with competitive low-cost pricing.
Email: [email protected] | WhatsApp: +8618638951317
