The QCJ-120 (120A, 120B) series paint film impact Tester is used for the paint film impact resistance test represented by the maximum height of 120 cm when a weight with a fixed mass falls on the test plate without causing damage to the paint film. After the impact head of this instrument impacts the test plate, there is no secondary rebound phenomenon.

1. Base; 2. Pillow block; 3. Punch rod; 4. Support arm; 5. Screw; 6. Slider; 7. Positioning mark; 8. Controller component

1. The lower bottom of the controller; 2. The electrical part of the controller; 3. The spring of the controller; 4. The upper cover of the controller; 5. The slider of the controller; 6. The control screw; 7. The hook; hammer assembly
The weight with the hook is fixed at the required height by the controller screw, and its height is that the height mark line shown on the slider scale coincides with the positioning mark line. Press the control screw to compress the spring of the controller. At this time, the round hole of the control slider is aligned with the round hole of the upper cover of the controller and the round hole of the lower bottom of the controller, so that the hook falls off, the weight falls, hits the punch, and the punch acts downward. On the test plate previously placed on the pillow blocks. Afterwards, lift the weight body and take out the test panel to observe the test condition of the paint film on the test panel.
| Instrument model | QCJ-120 type | QCJ-120A type | QCJ-120B type |
| Instrument scale length | 120±0.2cm | 120±0.2cm | 120±0.2cm |
| graduation | 1cm | 1cm | 1cm |
| Hammer mass | (1000±1) g | (1000±1)g | (2000±2)g |
| Impact head specification | S diameter 8mm | S diameter 16mm | S diameter 16mm |
| Pillow Block Hole Diameter | 15mm | 15mm | 16.3mm |
| radius of curvature | R2.5-3mm | R2.5-3mm | R2.5-3mm |
| Impact depth of impact head | (2±0.1) mm | (2.5±0.1)mm | (2.5±0.1)mm |
| hospitality standard | GB/T1732—93 Test method for impact resistance of paint film | GB/T5237.4-2000 Aluminum Alloy Architectural Profiles Part 4 Powder Coated Profiles | ASTM D2794-92 Test method for resistance to rapid deformation (impact) of organic coatings |