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Home / Precision Grinding, EDM & Wire EDM Services
Leadpoint combines surface, cylindrical, centerless, profile, and coordinate grinding with sinker EDM and wire EDM to manufacture hardened-steel, carbide, and complex precision components. Each process is selected according to geometry, material hardness, dimensional relationship, edge condition, and surface requirements.
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Grinding for flatness, diameter, profile and finish -
Sinker EDM for deep, narrow and complex cavities
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Wire EDM for precision profiles and hardened components
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Suitable for tool steel, carbide and high-wear parts
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Supported by Advanced Grinding & Testing Equipment
24/7 Technical Support & Full Inspection Reports
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Hardened Material Capability
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Complex Feature Machining
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Inspection Reports Available
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NDA Available
Typical Molds Types
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Hardened Mold Inserts -
Carbide Tool Components -
Precision Shaft‑Pin Parts -
Profile‑Ground Tools -
Wire‑Cut Split Parts -
EDM Complex Features -
Threaded Wear Inserts -
Gauge & Fixtures -
Electrode & Copper Parts -
Replacement Tooling
What Can We Manufacture for You?
Surface Grinding
Precision finishing of flat surfaces, shoulders, thickness, parallelism, and controlled steps for inserts, plates, punches, and tooling components.
Cylindrical & Centerless Grinding
External cylindrical finishing for shafts, pins, sleeves, core components, rods, and repeat round parts requiring controlled diameter and surface condition.
Profile / Optical & Coordinate Grinding
Complex profiles, small radii, form features, and accurate hole or contour relationships can be evaluated for specialized grinding methods.
Sinker EDM
Electrode‑based machining for deep ribs, blind cavities, narrow slots, sharp internal geometry, textured features, and hardened mold components.
Wire EDM
Precision cutting of punches, die inserts, profiles, openings, split components, and hardened parts with controlled geometry and edge condition.
Electrode & Process Engineering
Electrode material, wear allowance, flushing, rough/finish strategy, heat‑treatment sequence, and final grinding allowance are planned according to the component.
Reliable Mold & CNC Parts Manufacturer
Send us your drawings today, we provide free DFM analysis, professional quotation and full inspection reports for your project.
Industries We Support
These processes are especially important where material hardness, wear resistance, fine geometry, or close-fit relationships limit conventional machining.
- Precision Molds – For injection, compression, and die‑cast molds requiring complex cores, tight shut‑offs, and mirror finishes.
- Stamping Tools – For high‑strength metal forming with sharp edges, minimal burrs, and consistent clearance over long runs.
- Medical Molds – For implantable, surgical, and cosmetic devices demanding superior surface finish, biocompatibility, and micron‑level accuracy.
- Electronic Tooling – For connectors, leadframes, and miniature housings with fine pitch, high insulation, and contact reliability.
- Auto Energy – For structural, battery, and powertrain components requiring high fatigue strength and thermal stability.
- Automation Equip – For grippers, guides, and positioning stages in semiconductor and high‑speed assembly lines with zero‑defect criteria.
- Gauge Fixtures – For inspection jigs, setting masters, and custom gauges that demand dimensional stability and repeatable referencing.
Precision Materials for Every Component
Stainless Steel
- 303
- 304
- 316L
- 416
- 420F
- 17-4PH
- SUS440C
Aluminum Alloy
- 6061
- 5052
- 7075
- 6063
- 5083
- 2024
Mold & Alloy Steel
- S136
- NAK80
- SKD61
- H13
- SKD11
- DC53
- Cr12MoV
- 45#
- 40Cr
Others
- Brass (H59/H62/H65)
- Red copper / pure copper
- Beryllium copper (high elasticity)
- Titanium alloy (TC4 / Ti-6Al-4V)
- Various carbide grades
Cases Studies
Tolerance Guide
We deliver tight-tolerance machining with stable repeatability across complex CNC and automation components.
Combining advanced machining and precision inspection, we ensure every part meets strict dimensional and quality requirements.
| Inspection Item | Grinding Tolerance | EDM Tolerance | Common Gauge |
| Dimensions (OD / Thickness, etc.) | ±0.005 mm | ±0.01 mm | Micrometer / CMM |
| Flatness / Parallelism | 0.005 mm | 0.01 mm | CMM / Height Gauge |
| Roundness / Runout | 0.005 mm | 0.01 mm | Roundness Tester / Dial Indicator |
| Profile Accuracy | ±0.01 mm | ±0.01 mm | CMM / Optical Measurement |
| Surface Roughness Ra | 0.2–0.8 μm | 0.8–3.2 μm | Roughness Tester |
| Wire EDM Taper | — | ≤0.01 mm / 100 mm | CMM / Optical |
| Edge Burr / Recast Layer | Per drawing | Per agreement | Microscope / Visual |
Not sure about the right tolerance for your part?
Our engineering team can help optimize your design.
Precision Machining Capabilities Overview
Leadpoint's precision surface treatment processes cover six core areas, ensuring mold functionality and appearance throughout the entire workflow from rough machining to inspection.
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Surface & Profile Grinding
Processes flatness, parallelism, thickness, surface finish, and complex contours.
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Cylindrical & Centerless Grinding
Processes ODs, shoulders, rotational features, and high‑volume cylindrical parts.
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Jig / Coordinate Grinding
Processes precision holes and hole‑to‑hole relationships.
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Sinker & Wire EDM
Machines cavities via sinker EDM and through‑profiles/ openings via wire EDM.
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Surface Finishing
Polishes, laps, deburrs, and conditions edges.
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Dimensional Inspection
Inspects dimensions, form, and roughness using CMM, profile testers, and roughness testers.
*Not sure which finish is right for your part? Explore our complete guide
Manufacturing Process
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STEP 1
Process Planning -
STEP 2
Rough Machining -
STEP 3
Heat Treatment -
STEP 4
Semi Machining -
STEP 5
Finish Machining -
STEP 6
Final Inspection -
STEP 7
Clean & Ship
Guides to Optimize
FAQs
Ready to Start Your Custom Parts Project?
Upload your drawings (STEP, STP, IGES, STL) or contact our team for a fast and confidential quotation.
Get Free Quote 
Our Equipment
Our advanced manufacturing equipment ensures high precision, stable production, and consistent quality across every stage of mold design and manufacturing.
Expert Team, Exquisite Molding
The Leadpoint mold design team combines deep industry experience with practical expertise. Our core team members include:
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General Manager / Founder: 15+ years in precision mold and machining
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Technical Director: 12+ years in CNC machining and mold design
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Production Manager: 10+ years in precision manufacturing management
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Quality Manager: 8+ years in precision parts quality control
What You Can Expect From Us
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Correct Process Selection
We compare grinding, sinker EDM, wire EDM, and combined routes according to geometry, hardness, accuracy, surface, and cost.
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Hardened Steel and Carbide Focus
Non-contact EDM and specialized grinding methods support components that are difficult to machine after heat treatment.
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Controlled Finishing Allowance
Rough machining, heat treatment, EDM, and grinding allowances are planned to reduce distortion and rework.
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Functional Edge and Surface Control
Each batch is delivered with inspection reports including CMM, profile, and surface roughness reports to ensure consistency.
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Measurement Linked to Process
Profiles, diameters, flatness, roughness, and feature relationships are inspected with methods suitable for the specification.
