A 3mm diameter alumina ball indenter is fired at the sample at a speed of Vi = 10 m/s.
Collide and measure the rebound velocity Vr from the sample of the ball pressure device, displaying the rebound coefficient e = Vr / Vi.
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■Specifications Dimensions and weight of the testing machine body: Diameter 40mm (width) × 167mm (height), approximately 320g Indenter: Alumina ball with a diameter of 3mm, weight 0.06g Launch speed: 10m/s (tolerance ±5%) Launch method: Spring restoring force Dimensions and weight of the display unit: 69mm (width) × 115mm (height) × 28mm (thickness) Approximately 130g (without battery) Power supply: Two AA batteries, two AA rechargeable batteries Powered via miniUSB cable (5V 0.5A) Data transfer: miniUSB → computer (CSV format) Bluetooth → tablet (Android device, version 4.0 or higher recommended) Indenter speed detection range: 1 to 11m/s Speed measurement method: Light path interruption detection, two-point passage time measurement Measurement value display: LCD display (7-segment 8 digits, with backlight) Temperature: 10℃ to 35℃ Humidity: 90% or less, no condensation
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Applications/Examples of results
By using an alumina ball with a diameter of 3mm for the indenter, it has become possible to measure lighter, smaller, and thinner samples compared to conventional rebound testing machines. Testing can be freely conducted in any direction—up, down, left, or right. For ordinary steel, it is possible to display equivalent HRC, HRB, HV, HBW, and HS values.
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