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MTG gravel tester

Transaction customer
Selection guide
1. Product name     
Model number


Stone Chip Resistance Gravelometer

2. Sample description  
  This test equipment is prohibited:
Test and storage of samples of flammable, explosive and volatile substances
Testing and storage of corrosive substance samples
Testing or storage of biological samples
The testing or storage of fluids
3. Equipment characteristics  

The equipment is composed of: gun assembly, impact box, sample device fixture, feed funnel device (including vibrator), electric control system, air compressor (optional).
Each part belongs to the standard parts can be combined and assembled with the use of fast loading and unloading convenient practical to meet all major automotive material stripping tests.



4. property  


Ambient temperature is 5 ~ 35℃, relative humidity ≤ 85%RH,
There are samples in the test chamber
Lithotripsy testing of SAE J400 automotive surface coatings
ISO 20567-1 - Determination of the resistance of paints and varnishes to stone impact - Part 1: multiple impact tests
DIN 55996-1:2001 "Testing of the impact strength of coated materials on crushed stone - Part 1: Multiple impact tests"
 ASTM D3170-03(2007)
 GME 60268-96
 MGR ES30.AD.149
 ISO 20567-1-2005
 NES M0007 Section 28
 DIN EN ISO20567-1-2007
 FLTM BI 157-06
This feature specifies the protection capability of the coating to protect the axle from impact damage due to projectiles, such as gravel roadbed. This feature is applicable to category 1. Feature Parameters to be obtained
After performing the tests specified in, no holes shall be found in the coating, nor shall there be any change from the surface of the test sample. Test sample
The test sample shall be an axle or a partial axle covered with a coating for which evaluation is required. Test methods
Test samples shall be tested in accordance with Appendix C (Standard version) by firing projectiles at a protected surface.
4.1.5 Resistance to flying sand Overview
This feature specifies the protection capacity of the coating to protect the axle from damage due to repeated sand or fly sand impact. Feature Parameters to be obtained
After performing the tests specified in, the coating surface shall conform to:
For Class 1 and Class 2 protection, coating loss rating is 3,
For Class 3 protection, the coating loss rating is 4. As described in Appendix D (Standard version). Test sample
The test sample shall be an axle or a partial axle covered with a coating for which evaluation is required. Test methods
The methodology for assessing the ability to withstand flying sand impact is given in Appendix D (Standard).
Appendix C (Standard Version)
Methods for evaluating impact resistance of coatings
C.1 Principles
The test method is to fire the projectile at the protected surface, and then study the change of the coating and the change of the surface of the test sample.
C.2 Test sample
The test sample shall be a coated axle or a coated protected part of the axle representing the finished part.
C.3 Devices
The device is a machine that can launch a treated projectile (the diameter of the projectile is :32mm, the top Angle is :105°, and the mass is :60g). It should have a Vickers hardness value of 400.
C.4 Programs
It is launched by the expansion of a certain volume of compressed air with a pressure of 8 bar to ensure an exit velocity of 19.4m/s. The impact resistance is evaluated at -25°C and ambient temperature.
C.5 Presentation of test results
After the impact, the surface of the coating should be visually inspected, and once the coating has been removed, the outer surface of the test sample should also be inspected. Surface changes are recorded and compared according to the evaluation criteria given in this standard.
4.3. Pressure range 0~1Mpa 
4.4. Flow range 0~0.08m3/S
4.5. Inside diameter of compressed air pipe 12.7mm、19mm
4.6. Air tank volume 136L
4.7. Inside diameter of the gun barrel
4.8. Maximum sample size Width ≦105mm\ thickness ≤ 30mm
4.9. Collision room and 3D collision room SAE 45°90°,VDA54° 90°,Radiator impact chamber

4.10. noise ≦130dba
4.11. Mode of operation Suitable for continuous operation
4.12. Test medium Grit, sand, steel sand (shot), iron sand (shot)
4.13. Feed rate Adjustment by electromagnetic vibration feeder
4.14. Airflow pressure, velocity The built-in storage compressed air pressure and flow rate are kept constant and the speed is controlled by a regulating valve at the nozzle



Corresponding parameter set not found, please add it in property template of background
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