UNI 8112 Standard Wymiary dla Thread rolling screws, pan head and cross recessed
Wkrety samogwintujace z lbem walcowym, z gniazdem stozkowym i gniazdem krzyzowym
Norma okresla wlasciwosci wkretów samogwintujacych z lbem szesciokatnym do polaczen. Ten typ polaczenia gwintowanego, jesli sruba nie jest wymieniana, zapewnia dobra odpornosc na rozrywanie, poniewaz luz miedzy sruba a nakretka jest równy zeru. Dodatkowo, tarcie miedzy wspólpracujacymi czesciami dodatkowo zwieksza moment odkrecania. Informacje na temat przygotowania srednic otworów znajduja sie w normie UNI 8108.
Rysunek wymiarowy i diagramy techniczne
Kluczowe wymiary i parametry techniczne
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Dimensions in mm - source UNI 8112 Publication date: 1993 |
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| d thread size | M 2 | M 2.2 | M 2.5 | M 3 | M 3.5 | M 4 | M 5 | M 6 | M 8 | |
| P | 0.4 | 0.45 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 | |
| D max | 4 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | |
| D min | 3.82 | 3.82 | 4.82 | 5.82 | 6.78 | 7.78 | 9.78 | 11.73 | 15.73 | |
| k max | 1.72 | 1.72 | 2.12 | 2.52 | 2.82 | 3.25 | 3.95 | 4.75 | 6.15 | |
| k min | 1.48 | 1.48 | 1.88 | 2.28 | 2.58 | 2.95 | 3.65 | 4.45 | 5.85 | |
| r1 min | 0.2 | 0.2 | 0.26 | 0.3 | 0.35 | 0.4 | 0.5 | 0.6 | 0.8 | |
| r2 ≈ | 4 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | |
| v ≈ | 1.1 | 1.1 | 1.3 | 1.6 | 1.9 | 2 | 2.5 | 3 | 3.7 | |
| Z | recess nr | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 4 |
| m ≈ | 2.11 | 2.11 | 2.9 | 3.15 | 3.91 | 4.29 | 4.7 | 6.73 | 8.46 | |
| max depth | 1.42 | 1.42 | 1.78 | 2.06 | 1.93 | 2.34 | 2.74 | 3.48 | 4.17 | |
| min depth | 1.17 | 1.17 | 1.53 | 1.81 | 1.47 | 1.88 | 2.28 | 3.02 | 3.71 | |
| H | recess nr | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 4 |
| m ≈ | 2.5 | 2.5 | 2.7 | 3.1 | 4.2 | 4.6 | 5.3 | 6.8 | 9 | |
| max depth | 1.4 | 1.4 | 1.6 | 2 | 2.24 | 2.54 | 3.27 | 3.53 | 4.88 | |
| min depth | 1.1 | 1.1 | 1.3 | 1.7 | 1.74 | 2.04 | 2.77 | 3.05 | 4.18 | |
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Uni 8112 ≈ commercial items |
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| d thread size | M 2 | M 2.2 | M 2.5 | M 3 | M 3.5 | M 4 | M 5 | M 6 | M 8 |
| nominal length l | |||||||||
| 4 | X | X | X | ||||||
| 5 | X | X | X | X | |||||
| 6 | X | X | X | X | X | X | |||
| 8 | X | X | X | X | X | X | X | ||
| 10 | X | X | X | X | X | X | X | X | X |
| 12 | X | X | X | X | X | X | X | X | X |
| 14 | X | X | X | X | X | X | X | X | X |
| 16 | X | X | X | X | X | X | X | X | X |
| 20 | X | X | X | X | X | X | X | ||
| 25 | X | X | X | X | X | X | X | ||
| 30 | X | X | X | X | X | X | X | ||
| 35 | X | X | X | X | |||||
| 40 | X | X | X | ||||||
| 45 | X | X | X | ||||||
| 50 | X | X | X | ||||||