UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision granite v-block set in China. With abundant experience, we warmly welcome you to buy advanced precision granite v-block set made in China here from our factory. We also accept custom orders.
In high-precision manufacturing and metrology environments, the ability to consistently support and align cylindrical components is fundamental to measurement accuracy. The precision granite V-block set is designed specifically for this purpose, providing a stable, vibration-damped, and thermally stable reference structure for cylindrical part inspection.
Unlike traditional steel V-blocks that may deform over time due to residual stress or thermal variation, granite-based structures maintain geometric stability over long operational cycles. The addition of a hardened V-groove surface further enhances wear resistance while preserving alignment precision.
This combination of granite base material and precision-machined metal interface creates a hybrid structure optimized for both stability and durability.
Product Specifications
| Parameter | Description |
|---|---|
| Material Base | High-density precision black granite |
| Surface Insert | Hardened precision-ground steel / carbide alloy |
| Structure Type | Matched V-block pair |
| Surface Finish | Precision lapped granite + ground metal V surface |
| Typical Density | ~3100 kg/m³ (granite base) |
| Flatness Grade | Available up to high-precision metrology grade |
| Temperature Stability | Low thermal expansion behavior |
| Application Standard | DIN / JIS / ISO compatible metrology usage |
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Key Advantages and Engineering Benefits
- Exceptional dimensional stability under long-term use
- High vibration damping for stable measurement conditions
- Wear-resistant V-groove insert for repeated industrial use
- Suitable for high-precision cylindrical alignment tasks
- Reduced measurement uncertainty in metrology setups
- Resistant to corrosion, deformation, and residual stress drift
- Compatible with CMM and optical inspection systems
- Long service life with minimal recalibration requirement
Unlike conventional steel V-blocks, which may gradually lose geometric consistency due to stress release and thermal cycling, granite-based V-blocks maintain stable reference geometry without active compensation.
Application Scenarios in Precision Industry
In real industrial environments, precision granite V-blocks are widely used in:
- Shaft runout and concentricity measurement
- Bearing and spindle inspection systems
- Precision CNC machining setup alignment
- Calibration of rotating mechanical components
- Optical and laser measurement platforms
- Semiconductor equipment mechanical referencing
- Laboratory-grade dimensional inspection workflows
For example, in a metrology lab, a cylindrical shaft placed on a matched V-block pair can be rotated while a dial indicator or laser probe measures deviation. Because the V-block structure remains stable, measurement error is minimized and repeatability is significantly improved.
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Why Granite Instead of Steel?
Steel V-blocks are common in general machining environments, but they are more sensitive to:
- thermal expansion
- internal stress release
- long-term geometric drift
Granite, by contrast, offers:
- lower thermal expansion
- superior vibration damping
- long-term geometric stability
- better performance in precision environments
This makes granite V-blocks especially suitable for inspection-grade and calibration-grade applications where micrometer-level accuracy is required.
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FAQ
What is a granite V-block used for?
It is used to support and align cylindrical components during precision measurement and inspection.
How accurate are precision granite V-blocks?
Accuracy depends on manufacturing grade, but metrology-grade blocks can achieve micrometer-level stability.
Can granite V-blocks wear out?
The granite body does not wear easily; only the metal insert may experience long-term surface wear.
Why not use steel V-blocks instead?
Steel is more affected by thermal drift and stress deformation over time.
Are these suitable for CMM systems?
Yes, they are commonly used as auxiliary fixturing and reference supports.
Can they be customized?
Yes, dimensions, angles, and surface grades can be customized for specific applications.
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