Lapping Plate

Understanding Lapping Plates

Lapping is a precision finishing process that uses a loose abrasive slurry between a workpiece and a lapping plate to remove material and produce extremely flat, parallel, and smooth surfaces. The lapping plate itself must possess a high degree of flatness and stability to accurately transfer its geometry to the workpiece.

Key Characteristics & Function:

• High Flatness: Serves as the master flat surface during the lapping operation.
• Material Stability: Cast iron offers excellent dimensional stability, resisting warping over time, especially after proper stress relieving.
• Abrasive Retention: The porous nature of cast iron helps hold the lapping compound (abrasive particles suspended in a liquid carrier). Grooved plates further enhance this.
• Wear Resistance: Good quality cast iron provides reasonable wear resistance against the abrasive action.
• Grooving (Optional): Serrations or grooves (spiral, radial, cross-hatched) help distribute the lapping slurry evenly, allow swarf and excess abrasive to escape, and can improve cutting rates.

Shreeji Gears: Your Ahmedabad Lapping Plate Specialist

We employ meticulous manufacturing and quality control processes to produce lapping plates that meet stringent flatness and stability requirements.

Why Choose Shreeji Gears for Lapping Plates?

• Premium Cast Iron: Utilizing close-grained, stress-relieved Cast Iron (typically Grade FG 260 or higher) for maximum stability and wear resistance.
• Precision Machining & Grinding: Initial shaping and grinding operations achieve high levels of parallelism and preliminary flatness.
• Expert Lapping/Scraping: Final flatness is often achieved through skilled hand scraping or machine lapping processes, ensuring accuracy across the entire surface.
• Controlled Flatness Grades: Manufacturing plates to specific flatness tolerances, often comparable to surface plate grades (e.g., Grade 0, Grade 1, or custom requirements in microns).
• Custom Grooving: Offering various groove patterns (serrated, spiral, radial, cross-hatch) based on customer application and preference.
• Size Variety: Producing standard sizes (round or square) as well as custom dimensions to suit specific workpiece sizes and lapping needs.
• Rigorous Inspection: Flatness verification using precision instruments like autocollimators, electronic levels, or coordinate measuring machines (CMMs).

General Technical Specifications (Customizable):

• Material: Close-Grained Cast Iron (FG 260 / GG25 or higher), Stress Relieved.
• Shape: Round, Square.
• Sizes: Standard (e.g., 200mm, 300mm, 450mm, 600mm dia/sq) and Custom Sizes.
• Flatness Tolerance: Specified in microns per unit area (e.g., conforming to IS, DIN, or custom standards).
• Grooving: Plain (Ungrooved) or Grooved (Specify pattern: Serrated, Spiral, Radial, Cross-Hatch).
• Hardness: Typically 180-220 BHN.
• Construction: Solid or Ribbed (for larger sizes to maintain rigidity while reducing weight).

Achieve ultimate precision in flatness and surface finish with our expertly crafted lapping plates. Choose Shreeji Gears, your premier lapping plate manufacturer in Ahmedabad. Contact us today to discuss your precision finishing requirements!