100% Customization per Drawing

Leader Pins and Bushings

Precision leader pins and bushings for mold alignment — hardened SUJ2 guide pins Ø20–Ø80 mm, precision-ground to h5/g6, bolt-fixing retention for large molds, matched oil-groove bushings, ±0.002 mm alignment, HASCO / DME / MISUMI interchange, 3–7 day delivery.

SUJ2 bearing steel guide pins, hardened to HRC 58–62
Ø20–Ø80 mm configurable shaft, lengths in 1 mm increments
Guiding shaft precision-ground to h5 / g6 tolerance
Bolt-fixing retention for large molds, press-fit for standard plates
Matched leader bushings with lubrication grooves — H7/g6 sliding fit
MOQ 1 piece, 3–7 day standard delivery

Download CAD / Specs

Fast Response within 2 HoursSupport STEP, IGES, DWG, PDF Files

Technical Specifications

Leader Pins & Bushings Technical Parameters and Material Specs

Standard Materials

SUJ2 (GCr15 / AISI 52100)

Bearing steel, hardened for sliding wear resistance

Diameter Range

Ø 20 – Ø 80 mm

Configurable shaft; standard Ø30 / Ø40 / Ø50 series

Precision Tolerance

h5 / g6 ground

Alignment verified to ±0.002 mm on CMM

Hardness Range

HRC 58–62

Vacuum heat treated, optional nitriding

Parameter	Technical Details / Standard Values
Guiding Shaft Diameter (D)	Ø 20 mm – Ø 80 mm, configurable in 1 mm increments (standard bolt-fixing series Ø40–Ø60 mm)
Overall Length (L)	Configurable per plate stack — standard series 40–400 mm, custom lengths in 1 mm increments
Fit / Clearance	H7/g6 sliding fit with matched bushing; guiding shaft precision-ground to h5/h6
Material	SUJ2 bearing steel (GCr15 / AISI 52100); bushings in hardened steel or oil-impregnated bronze
Hardness	HRC 58–62; bushings carburized to 58–62 HRC; nitriding raises surface to HV 900+
Surface Treatment	Nitriding, TiN or chrome plating; oil grooves and stopper plates supplied for large-mold sets

Need a non-standard size or special alloy core pin? We specialize in 100% custom machining according to your 2D/3D CAD drawings.

CUSTOM MACHINING CAPABILITIES

Tailored Leader Pins & Bushings Machining and Special Processing Limits

📏 Dimensional Limits

Micro & Complex Dimensions

Outer Diameter (OD): Min Ø 0.2 mm to Max Ø 50.0 mm
Pin Length: Up to 600 mm (ultra-long leader pins and bushings supported)
Special Shapes: Stepped, tapered, flat D-cut, square head & eccentric pin tip

⚙️ Special Processes

Cooling & Deep Hole EDM

Cooling Channels: Internal water cooling holes & spiral baffle channels
Air Venting: Porous / vented leader pins and bushings structures for gas release
Micro-EDM: Complex cavity contours, thread inserts and micro-grooves

🛡️ Surface Treatments

Advanced PVD Coatings

TiN / TiAlN: High-heat resistance for die casting molds
DLC (Diamond-Like Carbon): Ultra-low friction for dry / cleanroom molding
Nitriding Treatment: HV 900–1100 surface hardness for extended mold life

Support 100% Customization According to Your Drawings

Send us your CAD files for a free DFM (Design for Manufacturability) analysis and instant quotation.

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QUALITY ASSURANCE & INSPECTION

Rigorous Precision Inspection & Quality Control Standards

🔬 Inspection Hardware

High-Precision Testing Equipment

ZEISS CMM for complex 3D contours
Nikon optical projector & tool presetters (0.001 mm resolution)
Vickers hardness testers & surface roughness gauge

🎯 Quality Standards

Zero-Defect Quality Assurance

100% critical dimension inspection before packaging & shipment
Concentricity & runout verification under optical magnifiers
Surface micro-scratch & polish quality double-check

📜 Material Compliance

Full Material & Heat Treatment Traceability

Spectrometer material composition analysis report provided
Original Mill Test Certificate (MTC) & heat treatment logs
RoHS & REACH environmental compliance statements

Download Sample Quality Control & Inspection Reports

Review our standard CMM inspection sheet, Material Composition Certificate, and RoHS report templates.

MANUFACTURING PROCESS & LEAD TIME

Precision Machining Workflow & Reliable Delivery Timelines

Turning / Soft CNC

Precision rough turning & blank shaping

Heat Treatment

Vacuum quenching (HRC 48–62)

Rough Grinding

Centerless & OD precision grinding

Finish Grinding / EDM

Jig grinding & micro-EDM features

Surface Coating

PVD (TiN/DLC) or polishing (Ra 0.1)

100% CMM QC

Dimension check & safe packaging

📦 Standard Delivery

3–5 Working Days

For standard dimensions, off-the-shelf standard blanks, and standard SKD61/H13 materials.

🛠️ Custom Manufacturing

7–10 Working Days

For tailored CAD drawings, complex cooling channels, special coatings, or tight ±0.002 mm tolerances.

⚡ Fast-Track Option

24–72 Hours Express

Emergency mold repair green channel available for urgent downtime orders (upon CAD review).

APPLICATION & INDUSTRY SOLUTIONS

Leader Pins & Bushings for Precise Mold Alignment Across Industries

🏭 Large Molds

Large Mold & Die Casting Alignment

Bolt-fixing leader pins Ø40–Ø60 mm for molds over 800 mm, where thermal expansion would otherwise cause 0.05–0.15 mm plate misalignment, flash and core shift.

🚗 Automotive

Automotive Interior & Exterior Molds

Hardened SUJ2 pins with guiding assist sets for long automotive molds — positive retention under high closing force and hot-plate conditions.

🔌 Electronics

Multi-Plate & 3C Electronics Molds

H7/g6-matched pin and bushing sets that keep stack molds and three-plate tools aligned on every cycle for consistent connector and housing tolerances.

🩺 Medical

Medical Device Molds

Corrosion-resistant surface options (chrome plating / nitriding) and smooth oil-groove travel for clean-room, high-cycle medical mold operation.

Key Mold Performance Challenges We Resolve:

Heat Fatigue & Thermal Cracking

Vacuum-quenched H13/SKD61 steel prevents thermal erosion in aluminum & zinc die casting.

High Wear & Galling Resistance

Advanced PVD coatings (TiAlN / DLC) extend pin service life by 3x–5x in abrasive glass-filled resins.

Mold Pin Bending & Flash Issues

Strict coaxiality (≤0.003 mm) and rigid alloy cores eliminate flash and core deflection during high-pressure injection.

MANUFACTURING CAPABILITY & DETAIL GALLERY

Precision Craftsmanship & Advanced Factory Hardware

Mirror Finish & Micro Polish

Ra 0.1 µm surface roughness, zero micro-burr or tool marks on pin tip.

Precision Chamfering & R-Angle

Smooth transition radii and precise lead-in chamfers per CAD specs.

PVD Coating & Nitriding Layers

Uniform TiAlN / DLC coating film thickness with high surface adhesion.

Complex Head & Tip Geometries

Precision stepped, D-cut flat, and eccentrically shaped pin profiles.

High-End Machining & Tooling Hardware:

⚡ Wire EDM

Seibu & Sodick Slow-Feed Wire Cut

Corner radius accuracy down to R0.02 mm
Surface roughness Ra 0.2 µm after wire cutting
Suitable for micro-slots, keyways, and complex pin contours

⚙️ Precision Grinding

Mitsui & WASINO Precision Grinders

Centerless & jig grinding for tight OD/length limits
Diameter tolerance controlled within ±0.001–±0.002 mm
Coaxiality & roundness ≤ 0.002 mm guaranteed

🛠️ CNC & EDM

Mikron High-Speed CNC & Sodick EDM

CNC high-speed turning & milling for blank preparation
Micro-cavity EDM for cooling channels and venting slots
Automated tool changers for high-volume consistency

ORDERING PROCESS & FREQUENTLY ASKED QUESTIONS

How to Order Custom Leader Pins & Bushings and Frequently Asked Questions

📁 Step 1

Submit CAD & Specs

Send 2D/3D drawings (STEP, DWG, PDF) with quantity, material, and tolerance requirements.

⏱️ Step 2

24H DFM & Quotation

Our engineering team conducts DFM analysis and provides a competitive quote within 24 hours.

⚙️ Step 3

Precision Manufacturing

CNC turning, vacuum heat treatment, jig grinding, and surface coating per your specifications.

✈️ Step 4

100% QC & Express Shipping

100% CMM dimensional verification, anti-rust packaging, and global air express delivery.

What is your Minimum Order Quantity (MOQ) for custom leader pins and bushings?

We support 1-piece prototyping! Whether you need a single replacement leader pins and bushings or bulk batch production of 10,000+ pieces, we accommodate all order volumes.

How do you guarantee material authenticity and heat treatment quality?

Every batch comes with original Mill Test Certificates (MTC) and spectral material analysis reports. Vacuum heat treatment logs (HRC hardness testing) are provided upon request.

What packaging and anti-rust protection do you apply for international shipping?

All finished leader pins and bushings undergo ultrasonic cleaning, immersion in heavy-duty anti-rust oil, individual vacuum plastic sealing, and padded shockproof box packaging.

Can you machine non-standard custom shapes or internal cooling channels?

Yes! We specialize in complex leader pins and bushings including stepped profiles, D-cuts, square heads, micro-EDM cavities, and internal/spiral water cooling channels per CAD specs.

Ready to Upgrade Your Mold Component Precision?

Send us your drawing today to receive a free DFM review and detailed quotation within 24 hours.

🔒 100% Confidential | NDA Protected | Instant DFM Assessment

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