Black Lab Table Marble Granite Surface Plate 2000 X 1000 mm

Granite Surface Plates are used for precision gauging, inspection, layout and marking purposes. They are preferred by Precision Tool Rooms, Engineering Industries and Research Laboratories because of their following outstanding advantages.

Salient Features :

• Natural granite seasoned for thousands of years is free from deterioration or dimensional change over time.
• Granite surface plate has many advantages over cast iron surface plates: Twice as hard as cast iron.
• Minimal changes in dimension due to temperature changes.
• Free from wringing, so there is no interruption of work. Free from burrs or protrusions because of the fine grain structure and insignificant stickiness; this ensures high degree of flatness over a long service life and causes no damage to other parts or instruments.
• Trouble-free operation for use with magnetic materials.
• Long life and rust-free, resulting in low maintenance costs.
• Granite Surface Plates meet or exceed Federal Specification GGG-P-463c. Each Surface Plate is shipped with a Certificate of Accuracy which guarantees its accuracy and verifies its traceability to the National Institute of Standards and Technology.
• All plates from 48"x108" and larger are Machine Base Gray Granite. Smaller plates are Black Granite.
• Surface Plates, to size of specifications other than standard, available on special order.
• Surface Plates, with the bolt screws, available on special order.

Our granite surface plate refers to the advanced standards of the leading countries, and its flatness tolerance is in accordance with the JB/T 7975-1999 Surface Plate:

Grade 000 =1x(1+d/1000)/μm

Grade 00 =2x(1+d/1000)/μm

Grade 0 =4x(1+d/1000)/μm

Grade 1 =8x(1+d/1000)/μm

(d is the length of the diagonal)