High Precision Granite Gauges and Measuring Tools from Reliable China Suppliers and Factory
V-blocks
- The necessary inspection tool for detecting concentricity and straightness with round bar.
- Suitable for materials used in clamps.
- One set contains two V-blocks.
- A necessary jig for processing 45˚ angle.
Granite master square
The granite square master is used to check the verticality between the Y axis and Z axis, the X axis and Z axis of the working machine, and the parallelism between the Y axis and the machine bed.
- For checking and calibrating the relative accuracy of the X, Y, Z axial on precision machine.
- Detect or calibrate the parallelism, straightness of working pieces.
- Axial correction and inspection of machine bed.
Calibration cub
- Vacuum pumps.
- Compressors in air-conditioning units.
- Refrigerating units and compressors.
- Biotech workstations.
- Drones.
- Automotive applications.
Parallel gauge
- The parallel gauge can be used to replace the pad block. With its own high precision, the user can raise the workpiece on the detection platform to detect the flatness and parallelism of the workpiece or machine tool table, guide rail and so on.
- Especially suitable for irregularly symmetric shaped workpieces.
Granite straight edge
Straight edges are used for checking of straightness, parallels, and flatness of machine tools, measuring machines and work pieces. Straight edges are very useful for layout and positioning of work pieces on precision surface plates.
- For measuring straightness and flatness.
- 2 surfaces or 4 surfaces with accuracy.
Granite Tri-square Master
- For measuring various angles of parts, working machine, etc.
- The size above 250*160mm are with holes to reduce the weight and it’s easier for users to take it.
Granite Surface plates
Many laboratories and shops rely specifically on granite surface plates for precise measurement and inspection. They are extremely accurate and stable due to the black granite material, providing a reliable reference point for measurements. Every measurement depends on an accurate surface reference from which dimensions are taken, and granite plates offer the perfect base for gaging surfaces and making accurate height measurements.
Granite Check Indicator Stand / Granite base with screw thread insert
Granite Check Indicator Stand/Granite base in various size and accuracy. Screw thread insert size can be indicated.
- Measuring dimension along with gauge blocks, dial indicators, or electronic probes.
- We can manufacture general gauge blocks or L-shaped blocks according to customers’ requirement for measuring.
Customized measuring tools
- For measuring objects in different shapes.
- For measuring non-ordinary verticality, parallelism or flatness.
- Customers can provide us the measurement points, and we design and produce special measuring tools for customers.
Reed type Mechanical Comparator
- The working principle of Reed type Comparator is similar to dial indicator and dial indicator.
- Reed type Comparator is a type of indicator without mechanical friction amplification mechanism.
- The diameter of reed type comparator is larger than that of a normal dial indicator (the diameter of the dial is about 70mm), and it is easy to read the value.
- The minimum division value is 0.5μm.
Frequently Asked Questions (FAQ)
What are the primary applications of V-blocks?
V-blocks are essential inspection tools used for detecting the concentricity and straightness of round bars. They are also suitable for materials used in clamps and serve as a necessary jig for processing 45-degree angles.
How does a Granite Master Square help in machine calibration?
The granite master square is designed to check the verticality between the Y and Z axes, and the X and Z axes of machines. It also measures the parallelism between the Y-axis and the machine bed, ensuring high-precision axial correction and calibration.
Where are Calibration Cubes commonly utilized?
Calibration cubes are widely used across multiple industries, including vacuum pumps, air-conditioning compressors, refrigerating units, biotech workstations, drones, and various automotive applications.
Can I get customized parallel gauges and measuring tools?
Yes, customized products can be manufactured. Special measuring tools can be designed and produced based on the specific measurement points, non-ordinary verticality, parallelism, or flatness requirements provided by the customer.
Why are Granite Surface Plates preferred for precise inspections?
Granite surface plates are extremely accurate and stable because they are made from black granite material. They provide a reliable, flat reference point that is crucial for taking accurate height measurements and gaging surfaces in laboratories and shops.
What makes the Reed-type Mechanical Comparator different from standard dial indicators?
The Reed-type Comparator operates without a mechanical friction amplification mechanism. It features a larger dial diameter of approximately 70mm, which makes it much easier to read values, and it offers a minimum division value of 0.5μm.

