Precision-machined, wear-resistant guide bushings designed for high-load stamping dies, plastic injection molds, and automated machinery. Engineered to maintain strict linear alignment, reduce frictional drag, and withstand continuous high-cycle reciprocating motion. Available in standard ISO/DIN metrics or custom dimensions manufactured strictly to engineering drawings.
Key Features
Optimized Lubrication Geometry: Integrated internal oil grooves or precision-drilled graphite plug arrays ensuring continuous lubricant distribution under heavy loads.
Precision-Ground Mating Surfaces: Inner bores and outer diameters ground to micron-level tolerances; shoulders and end faces perfectly square to the bore axis to eliminate assembly edge-loading.
High Wear & Galling Resistance: Balanced core toughness with high surface hardness to prevent adhesive wear and scoring during dry or marginal lubrication operation.
Technical Specifications
|
Parameter |
Specification Range |
|
Inner Diameter (ID) |
Φ 10 mm to Φ 200 mm (Custom sizes available) |
|
Outer Diameter (OD) |
Φ 18 mm to Φ 250 mm |
|
Overall Length |
30 mm to 300 mm |
|
Dimensional Tolerance |
ID/OD tolerance down to ±0.005 mm; Concentricity within 0.005 mm |
|
Hardness Profile |
Case hardened: HRC 58–62 (effective case depth 0.8 mm - 1.2 mm) or through-hardened |
|
Surface Finish (Ra) |
Inner bore: Ra ≤ 0.4 μm; Outer cylindrical surface: Ra ≤ 0.8 μm |
|
Surface Treatments |
Black oxide, manganese phosphating, or DLC (Diamond-Like Carbon) coating |
Materials & Machining Processes
Material Selection
Alloy & Bearing Steels: SUJ2, 40Cr, 20CrMnTi (optimized for high-load case hardening).
Tool Steels: SKD11 / D2, Cr12MoV (for maximum wear resistance in hard tooling).
Bronze Alloys: CuSn10P1, CuZn25Al6Fe3 (integrated with solid graphite lubricant plugs).
Manufacturing Workflow
CNC Turning: Raw bar stock or forged blanks machined on high-rigidity CNC lathes to rough dimensions, reserving uniform grinding allowance.
Heat Treatment: Controlled atmosphere vacuum furnace hardening and tempering to achieve designated microstructures and uniform hardness profiles.
Precision Grinding: High-precision CNC cylindrical and internal grinding of outer diameters and inner bores to achieve final tight tolerances and fine surface finishes.
Groove Machining / Finishing: High-speed milling, EDM, or automated plugging for lubrication channels followed by final deburring and cleaning.
Applications
Stamping Dies
Guide pillar and guide bush assemblies in progressive, transfer, and compound stamping tools.
Injection Molds
Core pin guides, ejector plate guiding, and mold base alignment pillars.
Automation Equipment
Linear guide bushings in high-cycle pick-and-place mechanisms, gantry systems, and pneumatic actuators.
Heavy Machinery
Sliding pivot bushings and alignment sleeves in industrial equipment joints.
Customization & OEM Services
Drawing-Based Production: Full capability to manufacture from client CAD files (STEP, IGES, PDF) with strict adherence to GD&T specifications.
Engineering Review: Professional layout and material evaluation to optimize performance, extend service life, or reduce production costs.
Rapid Prototyping: Streamlined setup for fast sample turnaround to support pre-production testing and prototype validation.
Volume Scalability: Flexible manufacturing capacities ranging from single-piece replacement components to batch quantities exceeding 10,000 units.
Quality Control & Inspection
Dimensional Verification: 100% inspection of critical ID/OD dimensions using calibrated air gages and high-precision micrometers.
Geometric Form Inspection: Roundness, cylindricity, and coaxiality evaluated using coordinate measuring machines (CMM) and form testers.
Metallurgical Testing: Rockwell hardness testing performed on every heat-treatment lot to verify core toughness and surface hardness specs.
Documentation Traceability: Material test reports (MTR) and dimensional inspection sheets supplied with every commercial shipment.
Packaging & Shipping
Anti-Corrosion Protection: Components coated with industrial-grade rust preventative oil and hermetically sealed in VCI (Volatile Corrosion Inhibitor) poly bags.
Impact Safeguards: Individually separated within partitioned heavy-duty cardboard boxes or custom foam inserts to prevent surface nicking or scuffing during handling.
Export Logistics: Packed in ISPM 15 compliant export-grade wooden crates or reinforced double-wall cartons suitable for global air and ocean freight.
FAQ
Q: What is the minimum order quantity (MOQ)?
A: Standard catalog items have no strict MOQ. Custom drawing orders are evaluated based on tooling setup, typically starting at 10–50 pieces.
Q: What is the standard production lead time?
A: Standard catalog components ship in 3–5 working days. Custom machined parts require 15–25 working days depending on heat treatment and geometry.
Q: What file formats are required for custom RFQs?
A: 2D PDF drawings detailing critical tolerances and surface finishes, accompanied by 3D models in STEP, IGES, or SolidWorks format.
Q: How do you prevent deformation on thin-walled bushings?
A: We utilize specialized chucking fixtures and precision internal grinding between centers to eliminate clamping distortion and maintain concentricity.
Q: Can you supply material and inspection certificates?
A: Yes, full 3.1 material test certificates and lot-specific inspection reports are provided upon request prior to dispatch.
Q: Which surface treatment is best for low-lubrication environments?
A: We recommend bronze alloys with solid graphite plugs or steel bushings treated with DLC (Diamond-Like Carbon) coatings to minimize friction.
Request a Quote
To receive an accurate technical proposal and competitive pricing, please include the following in your inquiry:
Engineering Drawings: PDF blueprint containing critical dimensions, geometric tolerances, and surface roughness (Ra) values.
Material Requirements: Specified alloy grade or functional operating conditions (load, sliding speed, lubrication type).
Quantity Requirements: Annual volume and requested per-batch delivery schedules.
Surface Treatments: Any specific plating, coating, or thermal treatment demands.
Target Delivery Date: Required on-site arrival date for your project timeline.
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