Assembly Guidelines for Granite Machine Components

Granite machine components are precision-engineered parts made from premium black granite through a combination of mechanical processing and manual grinding. These components are known for their exceptional hardness, dimensional stability, and wear resistance, making them ideal for use in precision machinery under high loads and varying environmental conditions.

Key Features of Granite Machine Components

• High Dimensional Accuracy
  Granite components maintain excellent geometric precision and surface stability even under normal temperature fluctuations.

• Corrosion and Rust Resistance
  Naturally resistant to acid, alkali, and oxidation. No special anti-corrosion treatment is required.

• Wear and Impact Resistance
  Scratches or dents on the surface do not affect measurement or machine performance. Granite is highly resistant to deformation.

• Non-Magnetic and Electrically Insulated
  Ideal for high-precision environments requiring magnetic neutrality and electrical isolation.

• Smooth Movement During Operation
  Ensures frictionless sliding of machine parts without stick-slip effects.

• Thermal Stability
  With a low coefficient of linear expansion and uniform internal structure, granite components do not warp or deform over time.

Mechanical Assembly Guidelines for Granite Machine Parts

To ensure optimal performance and long-term reliability, careful attention should be paid during the assembly of granite-based machine structures. Below are key recommendations:

1. Thorough Cleaning of All Components

All parts must be cleaned to remove casting sand, rust, chips, or residue.

• Internal surfaces, such as machine frames or gantries, should be treated with rustproof coatings.

• Use kerosene, diesel, or gasoline for degreasing, followed by compressed air drying.

2. Lubrication of Mating Surfaces

Before assembling joints or moving parts, apply appropriate lubricants.

• Focus areas include spindle bearings, lead screw-nut assemblies, and linear slides.

3. Accurate Fitment of Mating Parts

All mating dimensions should be rechecked or spot-checked before installation.

• For example, check the spindle shaft fit with bearing housing, or the alignment of bearing bores in spindle heads.

4. Gear Alignment

Gear sets must be installed with coaxial alignment, and ensure gear axes lie in the same plane.

• Tooth engagement should have proper backlash and parallelism.

• Axial misalignment should not exceed 2 mm.

5. Contact Surface Flatness Check

All connecting surfaces must be free of deformation and burrs.

• Surfaces should be smooth, level, and tightly fitted to avoid stress concentration or instability.

6. Seal Installation

Sealing components should be pressed into grooves evenly and without twisting.

• Damaged or scratched seals must be replaced to prevent leaks.

7. Pulley and Belt Alignment

Ensure both pulley shafts are parallel, and pulley grooves are aligned.

• Misalignment can cause belt slippage, uneven tension, and accelerated wear.

• V-belts must be matched in length and tension before installation to prevent vibration during operation.

Conclusion

Granite mechanical components offer superior stability, precision, and longevity, making them ideal for high-end CNC systems, metrology machines, and industrial automation. Proper assembly practices not only preserve their performance but also extend machine service life and reduce maintenance costs.

Whether you’re integrating granite frames into a gantry system or assembling precision motion platforms, these guidelines ensure that your equipment runs with maximum efficiency and accuracy.