High Precision Granite Machine Parts By Custom-Made
 
This Granite precision combination customized for linear motors as base, column, beams. These granite precision plate's flatness and straightness should meet 5um. 2 line tracks would be mount on it, so the 2 line track should be in parallel and straightness. There are 2 bridges on this granite base. The bridges should be perpendicular, parallel, and straight. The granite precision component dimension: length: 3000mm, width: 1000mm, height: 100mm. 2 gantry height:250mm. Total weight: 1200KG. This granite precision combination tailor-made for 2 head optical lens 5 axis linear motorized positioning stages.
 

Physical Property of Jinan Black Granite:

Specific Gravity: 3.03 g/cm3
Shore Hardness: > 70Hs-80Hs
Tensile strength: 211Kg/cm2
Compressive Strength: 245-254Mpa
Linear Expansion Coefficient: 4.61´10--6/°C
Elastic Modulus: 30-50Gpa
Water Absorptivity: ≤0.13%

Salient Features :

Made from close-grained Granite having uniform color and texture having hardness between 5.6 to 7 on Moh's scale, sound and free from flaws fissures and large inclusions of softer minerals.
Made generally as per GB117-2015. Also available on request conforming to DIN-876-1972, BS-817-1988, JIS -B-7513 and US Federal specification GGG-P-463-C.
metallic threaded inserts, metallic T-slots, Plates with two or four ledges also can be supplied against specific request at extra cost.
Rexine cover provided for top working surface with each Plate.
steel stand with leveling screws are available on request at extra cost.
Granite Lapping Plates square and rectangular available on request.
Also available in Grade 00 as per DIN 876.
Sizes offered from 200x300mm to 8000x2000mm
Other sizes are also offered on request.