Proceq N / L - Page 20

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3.5.4 Concrete Test Hammer Model N/L
Fig. 3.3 Lengthways section through the concrete test
hammer
Key:
1 Impact Plunger
2 Test surface
3 Housing
4 Rider with guide rod
5 Not used
6 Push-button, complete
7 Hammer guide bar
8 Guide disk
9 Cap
10 Two-part ring
11 Rear Cover
12 Compression spring
13 Pawl
14 Hammer mass: 14.1 model N, 14.2 model L
15 Retaining spring
16 Impact spring
17 Guide sleeve
18 Felt washer
19 Plexiglas window
20 Trip screw
21 Lock nut
22 Pin
23 Pawl spring