High-precision T-grooves cast iron lapping plate with HT250 material construction, designed for machine bed surface applications requiring exceptional flatness and durability.

• Material: HT200-300 cast iron
• Standard: GB/T22095-2008
• Hardness: HB160-240 working surface
• Working Temperature: (20±5)°C

• Surface Treatment: Hand-scraped, finish-milling, or ground finish
• Surface Coating: Pickling oil, plastic-lined, or anticorrosion paint
• Custom Features: V, T, straight-shaped slots, tapped holes, long holes, grid lines

• Foundry Process: Sand casting or centrifugal casting
• Molding Type: Resin sand molding
• Painting: Primer and face paint

Proper installation is essential for optimal performance. Follow these steps:

• Set up on level, firm ground without vibration
• Place pad iron first, then position surface plate on top
• Remove wooden case and protective oil coating
• Measure levelness and adjust pad iron as needed
• Ensure safety during adjustment process

• Use entire plate surface uniformly to prevent local wear
• Keep plate clean and free from debris, iron scrap, and sand
• Place workpieces gently to avoid surface impact damage
• Immediately repair any impact marks or convex areas
• Avoid hammer work on the surface plate
• Clean after use; apply anti-rust oil for long-term storage

Available in standard sizes from 100×200mm to 3000×8000mm, with custom specifications available upon request including various slot configurations and precision grades.