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The high strength rebound test hammer, also called as the Schmidt hammer, is used to test the strength of high-rise buildings structure components, bridges, and concrete components( board, beam, column, crane span structure. It's common modern building NDT equipment.
The guiding rod is made of high quality imported material, with high accuracy and abrasion-proof.
Ultrasonic aluminum enclosure prolong the tooling life;
External spring structure is easy for friction adjusting and also can guarantee uniform friction force between needle pivot and slider, thus to assure the instrument accuracy.
HT-225 N TypeTest hammer / Rebound hammer / Schmidt hammer
|
Model |
HT-450 |
HT-550 |
HT-1000 |
|
Standard energy |
4.5J |
5.5J |
9.8J(1Kgf.m) |
|
Strike spring stroke |
106mm |
100mm |
140mm |
|
Strike spring stiffness |
900N/m±40 N/m |
1100N/m |
1000N/m |
|
Test anvil calibration value |
88±2 |
83±2 |
83±2 |
|
Net weight |
3kg |
1.28kg |
3.5kg |
|
Size |
ф64×430mm |
Φ54×350mm |
Φ65×486mm |
|
Strength testing range |
20-110MPa |
60-90MPa |
50-80Mpa |
Maintenance of the concrete rebound test hammer
In order to keep good accuracy, we should be careful in operation and storage. Daily maintenance is strong recommended.
1. Before put test hammer back to the suitcase after each test work, we should clear it; too much dirt will influence accuracy even make the instrument out of work.
2. Do not play test hammer for fun, or test unclear metal object.
3. Generally, clear the machine core is definitely good after long time use or after used in dirty place. Clear it by petrol or alcohol, and wipe watch oil on center pole, at the end, calibrate it on the steel anvil. During a large number of tests, we should keep regular maintenance.
SERVE REAL INSTRUMENTS is a professional manufacturer for concrete test hammers, including types of normal model HT-225, high strength model HT-450, HT-550, HT-1000; We also supply anvils for these test hammers calibrations. All the test hammers test strength curve are based on equivalent of 150mm3 concrete cubes.
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