UNI 8113 Standard Wymiary dla Thread rolling screws countersunk head, cross recessed metric thread
Wkrety samogwintujace z lbem stozkowym, metrycznym z 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 8113 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 | 3.8 | 4.3 | 4.7 | 5.6 | 6.5 | 7.5 | 9.2 | 11 | 14.5 | |
| D min | 3.5 | 4 | 4.4 | 5.3 | 6.14 | 7.14 | 8.84 | 10.57 | 14.07 | |
| k max | 1.2 | 1.3 | 1.5 | 1.65 | 1.93 | 2.2 | 2.5 | 3 | 4 | |
| r ≈ | 0.2 | 0.25 | 0.25 | 0.3 | 0.35 | 0.4 | 0.5 | 0.6 | 0.8 | |
| Z | recess nr | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 4 |
| m ≈ | 2.4 | 2.4 | 2.8 | 3 | 4 | 4.2 | 4.4 | 6.1 | 8.5 | |
| max depth | 1.35 | 1.35 | 1.73 | 2.01 | 2.06 | 2.31 | 2.51 | 2.92 | 4.38 | |
| min depth | 1.1 | 1.1 | 1.48 | 1.76 | 1.6 | 1.85 | 2.05 | 2.46 | 3.86 | |
| H | recess nr | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 4 |
| m ≈ | 2.5 | 2.5 | 2.7 | 2.9 | 3.9 | 4.4 | 4.6 | 6.6 | 8.7 | |
| max depth | 1.32 | 1.32 | 1.55 | 1.8 | 1.9 | 2.4 | 2.6 | 3.3 | 4.4 | |
| min depth | 1.02 | 1.02 | 1.25 | 1.5 | 1.4 | 1.9 | 2.1 | 2.8 | 3.9 | |
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UNI 8113 ≈ 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 | |||||||||
| 6 | X | X | X | ||||||
| 8 | X | X | X | X | |||||
| 10 | X | X | X | X | X | X | X | ||
| 12 | X | X | X | X | X | X | X | ||
| 14 | 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 | |||
| 35 | X | X | X | X | |||||
| 40 | X | X | X | X | |||||
| 45 | X | X | X | ||||||
| 50 | X | X | X | ||||||