Custom SKD11 CNC Machined Locating Block, ±0.005 Tolerance Passivation Treatment Jig Fixture Component

Description

Product Overview
Our Custom SKD11 CNC Machined Locating Block is a premium industrial component engineered for extreme durability and micron-level accuracy. Designed specifically for high-precision jigs, fixtures, and automation equipment, this L-shaped locating block features a prominent positive-stop shoulder, multiple clearance holes, and threaded auxiliary mounting ports. Manufactured from premium SKD11 tool steel, treated with passivation for enhanced corrosion resistance, and machined to a stringent ±0.005mm tolerance, this component guarantees reliable, repeatable positioning in demanding production environments.

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CNC Machining Services & Specification Parameters

We provide comprehensive CNC machining services tailored for precision tool steel components. Below is our standard technical capability table for this custom locating block:

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Related Precision Machining Services

While this SKD11 locating block demonstrates our expertise in tool steel, we also offer extensive and specialized CNC machining capabilities for various stainless steel grades (including 303, 304, 316L, and 17-4PH) with the same rigorous ±0.005mm tolerance and advanced passivation treatments.

For detailed information on our dedicated stainless steel machining portfolio, high-precision part prototyping, and fast-turnaround mass production, please visit our comprehensive service page here:
👉 https://www.xinqidamachining.com/custom-stainless-steel-cnc-machining-services/

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Application Scenarios

Due to its high hardness and precise mechanical stop function, this SKD11 locating block is widely used in:

• Injection Molding & Die Casting: As a precise slide stop or core puller limit block within complex molds.

• Automation & Robotic Assembly Lines: Installing along linear guide rails to act as hard stops for pneumatic cylinders or servo-driven sliding carriages.

• Jigs and Fixtures (Test Equipment): Used as a datum locating reference to ensure precise alignment of workpieces during secondary operations or quality inspection.

• Semiconductor Manufacturing: As a critical mounting bracket and alignment stopper for wafer handling mechanisms, where strict cleanliness and low friction are required.

• Aerospace & Medical Devices: Providing reliable structural support and positioning for high-tolerance mechanical assemblies.

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Material Analysis: SKD11 (JIS Standard)

We strictly use imported or premium domestic SKD11 steel for this locating block.

• Composition: High Carbon (1.4%-1.6%) and High Chromium (11%-13%) cold work die steel.

• Heat Treatment: Vacuum heat treated to HRC 58-62.

• Key Advantages:

  • Superior Wear Resistance: The high chromium content forms hard carbides, ensuring the locating surface shows minimal wear even after millions of cycles.

  • High Dimensional Stability: Excellent hardening properties with minimal distortion during heat treatment, ensuring the ±0.005mm tolerance can be maintained.

  • High Toughness: Unlike D2 (which can be brittle), properly treated SKD11 offers excellent impact resistance, preventing the locating step from cracking under heavy impact.

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Tolerance Capability & Precision Control

Achieving ±0.005mm (5 microns) on a complex L-shaped fixture block requires a multi-stage manufacturing process:

1. Precision CNC Milling: Roughing and semi-finishing the block with high-rigidity, temperature-controlled CNC machines.

2. Wire EDM (Electrical Discharge Machining): Often utilized for the critical vertical locating step and internal corner radii to ensure perfectly straight, perpendicular datum surfaces.

3. Precision Grinding (Surface & Jig Grinder): Post-heat treatment, the critical contact surfaces are precision-ground to finalize the ±0.005mm tolerance.

4. CMM (3D Coordinate Measuring Machine) Inspection: Every critical dimension is verified under a strictly temperature-controlled laboratory (20°C ± 1°C) to eliminate thermal expansion errors.

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Manufacturing Challenges for SKD11 & Solutions

Producing this specific part poses several technical challenges in the CNC machining services industry:

• Challenge 1: Material Hardness (HRC 58-62). Standard carbide tools wear out rapidly when cutting hardened SKD11, leading to dimensional drift.

  • Our Solution: We utilize high-performance PVD-coated micro-grain carbide end mills and CBN (Cubic Boron Nitride) inserts, running at specific reduced speeds with high-pressure coolant to maximize tool life and cut precision.

• Challenge 2: Stress Relief & Distortion. The L-shape geometry of the locating block makes it prone to warping during heat treatment.

  • Our Solution: We perform Cryogenic Treatment and Double Tempering after initial rough machining, followed by ultra-precise slow wire EDM and grinding to remove any stress-induced warping.

• Challenge 3: Strict Geometric Tolerances. Maintaining perpendicularity and flatness within 0.005mm across the base and vertical stop face is mechanically difficult.

  • Our Solution: Using a single setup (often 5-axis machining) or highly calibrated Swiss-style precision grinding to hold the datum planes rigidly in place.

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FAQ (Frequently Asked Questions)

Q1: What does the “Passivation” treatment do for this locating block?
A: Passivation removes free iron particles and contaminants from the surface of the steel. It creates a thin, invisible oxide film that drastically increases corrosion resistance, prevents red rust, and ensures the component is clean and safe for use in precision clean-room environments (e.g., semiconductor/medical assembly).

Q2: Do you provide heat treatment, or do I have to do it myself?
A: We offer a fully integrated service. We handle the complete workflow: Raw Material → Rough CNC Machining → Vacuum Heat Treatment (HRC 58-62) → Precision Grinding + Wire EDM → Final QC. This ensures that the dimensions remain strictly within your ±0.005mm tolerance after hardening, which is extremely difficult if done externally.

Q3: How do you guarantee the ±0.005mm tolerance for the key locating surfaces?
A: We use a rigorous triple-check method: 1) In-process measurement using digital indicators during grinding. 2) Full 3D CMM measurement upon completion of machining. 3) A final dimensional report (FAI – First Article Inspection) is provided with every shipment for your verification.

Q4: What is your typical lead time for a prototype run (e.g., 1-5 pieces)?
A: For standard SKD11 material and passivation, we can deliver a prototype within 7 to 10 working days. For mass production, the lead time varies between 2-4 weeks, depending on order volume.

Q5: How is the part packaged to prevent scratches during shipping?
A: Since this is a precision locating block (critical surfaces require 0.005mm accuracy), we apply VCI (Volatile Corrosion Inhibitor) anti-rust oil, wrap the block in high-density foam, and securely place it inside custom-cut EPE (Expanded Polyethylene) fixtures within a double-walled cardboard box or wooden crate to ensure zero physical impact during transit.

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Contact us today for a free DFM (Design for Manufacturing) analysis and instant quote on your custom SKD11 locating blocks and other precision CNC machined components. Let our engineering team optimize your designs for both cost-efficiency and maximum precision!