Heavy-section structural bases engineered for linear guide and ballscrew alignment in CNC machine tools. Machined from stress-relieved castings or structural steel weldments, providing a stable geometric reference plane for dynamic loads.
Primary Function: Load distribution, vibration damping, and co-planar mounting datum for linear guideways.
Standard Conformity: ISO 2768-mK (general), ISO 1101 (geometric tolerance), ISO 9001:2015 certified process footprint.
Supply Scope: Finished machined components with drilled/tapped mounting holes per STEP/IGES customer CAD.
Technical Specifications
|
Parameter |
Specification Range / Standard |
|
Material Options |
HT250 (GG25), HT300 (GG30), GGG40 (Nodular), Q355B (Welded Steel) |
|
Max Dimensions |
Length: 6,000 mm × Width: 1,500 mm × Height: 800 mm |
|
Mass Limit |
Up to 8,000 kg single piece |
|
Datum Flatness |
≤ 0.012 mm / 1,000 mm (Grade 0/1 scraping or precision milling) |
|
Parallelism of Dual Rails |
≤ 0.015 mm across span |
|
Surface Roughness (Ra) |
0.8 µm (mounting pad), 3.2 µm (non-functional body) |
|
Hardness (Cast Iron) |
HB 187 – 241 (uniform matrix, pearlite ≥ 90%) |
|
Thermal Stress Relief (TSR) |
Controlled annealing (550°C ± 20°C, 8-hr soak) or VSR |
Key Features
Controlled Residual Stress: Thermal stress-relief (TSR) furnace cycles eliminate machining distortion; verified via strain-gauge spot checks prior to finish milling.
Monolithic/Modular Integration: Integral oil-drain channels, rack-mounting faces, and limit-switch blocks machined in a single clamping setup where envelope permits.
High Damping Coefficient: Gray cast iron matrix suppresses chatter frequencies during high-feed-rate milling operations.
Corrosion-Resistant Preservative: Deburred to R0.5 mm min; coated with Tectyl 506 rust preventive film (90-day indoor protection).
Applications
Gantry Milling & Routing Centers: Bridge-type structural bed rails.
Heavy Lathe Beds: Carriage longitudinal guide sub-bases.
Laser/Plasma Cutters: Multi-segment modular gantry foundation rails.
Industrial Automation Transfer Lines: High-load multi-axis synchronized pick-and-place frames.
Customization (Build-to-Print)
Input Data Required: 3D STEP/IGES, 2D PDF with GD&T, annual volume forecast, destination port.
Engineering Review Scope: Casting draft angle check, wall-thickness uniformity analysis, clamping deformation risk feedback within 48 hours.
Modification Support: Core-box adjustment, local pad reinforcement, specialized thread inserts (Helicoil/Keensert) specification.
Quality Control & Inspection Workflow
Rough Casting: Ultrasonic flaw detection (ASTM E446 Level 2 on critical stressed zones); chemical composition spectrometer test per melt batch.
In-Process: Laser interferometer / 3D laser tracker (Leica AT960) geometric verification post-stress-relief.
Final Audit: Full CMM inspection report supplied with shipment; 100% thread gauge verification for M5–M20 mounting taps.
Manufacturing & Process Footprint
Foundry Partner Network: Controlled pour protocols for grey/nodular iron; controlled cooling curve down to <200°C before shakeout.
Machining Assets: 5-axis gantry milling centers (table size 8,000 × 2,500 mm), floor boring-mill stations.
Traceability: Laser-engraved heat/batch serial number on non-functional face mapped to material test report (MTR) 3.1 (archived 10 years).
Packaging & Delivery
Dunnage: Fumigation-free ISPM 15 certified wooden cradles custom-contoured to casting profile; bolted restraint bars prevent shifting.
Sealing: VCI (Volatile Corrosion Inhibitor) poly bag enclosure + desiccant packs.
Shipping Terms: FOB / CIF / DDP (Port of Ningbo/Shanghai origin). Lead time: 4–6 weeks for first article, 3 weeks for repeat batch.
Contingency/Capacity Protection: Dedicated safety-stock buffer agreement available for annual blanket POs to eliminate assembly line starvation.
FAQ
Request a Quote (RFQ Checklist)
To accelerate engineering evaluation, please attach:
3D CAD (STEP) + 2D Drawing with GD&T
Target Annual Quantity & Batch Release Schedule
Target Delivery Port (City/Country)
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