Velocity meter and magazine
Velocity meter at the barrel for setting the speed by pressure; magazine for up to 40 bullets.
Stone Impact Test Stand
Hegewald & Peschke Stone Impact Tester
Stone and multi impact tests on coatings, plastics, composites, textiles and vehicle parts
The Stone Impact Tester from Hegewald & Peschke fires 4-5 mm projectiles with compressed air at up to 140 km/h to test how coatings, paints, plastics and vehicle parts resist stone impact.
Manufactured byHegewald & Peschke
140 km/hMax. bullet velocity
Ø 4–5 mmProjectiles
40 bulletsMagazine capacity
1000 x 900 x 300 mmMax. specimen size
150 to >600 mmDistance to test piece
Overview
Defined impacts from a fully enclosed stand
The stone impact tester determines the impact behaviour of materials and components, such as single-layer or multi-layer coatings, paints, plastic composites, textiles and vehicle parts. Small projectiles are shot at the specimen with compressed air.
It is used for objects exposed to stone impact, such as radiators, bonnets, wheel rims, windscreens, traffic signs, roofing materials, windows, plastics and composite materials. The stand is fully enclosed so that bullets and splinters cannot escape.
The projectile speed is set by the pressure and checked with a velocity meter, which allows defined impact testing beyond conventional grit testers and beyond the requirements of ASTM D 3170 and DIN EN ISO 20567-1.
Test setup
Barrel, velocity meter and positioning
Interchangeable barrel
Barrel slightly larger than the bullets, fed by a quick-opening valve from a pressure vessel.
Specimen positioning
Inclination around 1 or 2 axes, positions read from scales, distance 150 to >600 mm.
Enclosure and safety
Closed on all sides, plywood rear panels, door monitoring blocks firing when open.
Applications
What the stone impact tester tests
Vehicle radiators
Stone impact tests on radiators set at a defined angle.
Wheel rims
Impact resistance of rim surfaces and coatings.
Engine bonnets
Stone chip behaviour of painted body parts.
Plexiglas panes
Multi impact tests on transparent panes.
Hail-resistant textiles
Multi impact tests on technical textiles, e.g. for awnings.
Features
Shooting device and safety
Shooting device
- Interchangeable barrel system for 4-5 mm projectiles.
- Bullet velocity up to 140 km/h, checked with the included velocity meter.
- Compressed air reservoir for constant conditions over a test series.
- Laser pointer for aiming; geometrically exact bullets can reduce scatter.
Specimen and positioning
- Shooting device positioned freely from outside and fixed by pneumatic clamping.
- Specimen inclination freely adjustable around 1 or 2 axes.
- Positions read reproducibly from scales.
- Max. specimen 1000 x 900 x 300 mm, larger on request.
Safety and data
- Fully enclosed stand with exchangeable plywood panels.
- Doors monitored by pneumatic limit switches.
- No additional software; records shot, speed and target position.
- Machine approx. 1400 x 1400 x 2490 mm.
Benefits
Why use this test stand
Real stone impact. Simulates real stone impact damage on products and materials.
Material comparison. Evaluates the resistance of coatings, paints, plastics, composites and textiles.
Safe operation. The fully enclosed design keeps bullets and splinters inside.
Repeatable impacts. Stable air supply and velocity measurement give defined impact speeds.
Large components. Adjustable positioning suits different and large parts.
More control. Gives more controlled impact evaluation than conventional grit testers.
Need support with this impact test stand?
Share your specimens, sizes, coatings, impact speeds and test standards, and our Performance Engineering team will support you with the suitable product information.
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