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feito do vanádio alto do aço carbono ou do cromo (crv) com ponto do brad e de 2 empurrou dentes retos do corte.
* o ponto central entra primeiramente; impede “patinar”.
* as flautas do corte so projetadas para a ejeço a melhor da microplaqueta assim que a broca no ligará e no se queimará.
* para furar furos exatos, lasca-livres na madeira macia, na madeira dura, na madeira compensada e no carto duro.
* use brocas disponivéis, brocas portáteis elétricas, imprensas de broca e tornos.
Sistema métrico | |||
Dimetro | Comprimento total | Dimetro de pata | |
3 | 60 | 3 | |
4 | 75 | 4 | |
5 | 85 | 5 | |
6 | 90 | 6 | |
7 | 105 | 7 | |
8 | 115 | 8 | |
9 | 120 | 9 | |
10 | 120 | 10 | |
11 | 150 | 10 | |
12 | 150 | 10 | |
13 | 150 | 10 | |
14 | 150 | 10 | |
15 | 150 | 10 | |
16 | 160 | 10 | |
17 | 160 | 13 | |
18 | 160 | 13 | |
19,0 | 160 | 13 | |
20,0 | 160 | 13 | |
21,0 | 160 | 13 | |
22,0 | 160 | 13 | |
23,0 | 160 | 13 | |
24,0 | 160 | 13 | |
25,0 | 160 | 13 | |
26,0 | 160 | 13 |
Sistema britnico | ||
Dimetro | Comprimento total | Dimetro de pata |
1/8" | 2-3/8” | 1/8" |
9/64" | 2-7/8” | 9/64" |
5/32" | 3-1/16” | 5/32" |
11/64" | 3-1/8” | 11/64" |
3/16" | 3-1/2” | 3/16" |
13/64" | 3-11/16” | 13/64" |
7/32" | 3-23/32” | 7/32" |
15/64" | 3-27/32” | 15/64" |
1/4" | 3-31/32” | 1/4" |
17/64" | 4-1/8” | 17/64" |
9/32" | 4-3/16” | 9/32" |
19/64" | 4-11/32” | 19/64" |
5/16" | 4-7/16” | 5/16" |
21/64" | 4-23/32” | 21/64" |
11/32" | 4-25/32” | 11/32" |
23/64" | 4-25/32” | 23/64" |
3/8" | 5" | 3/8" |
25/64" | 5-1/32” | 3/8" |
13/32" | 5-3/16” | 3/8" |
27/64" | 5-11/32” | 3/8" |
7/16" | 5-1/2” | 3/8" |
29/64" | 5-5/8” | 3/8" |
15/32" | 5-3/4” | 3/8" |
31/64" | 5-3/4” | 3/8" |
1/2” | 5-3/4” | 3/8" |
9/16" | 6" | 3/8" |
5/8" | 7" | 3/8" |
3/4" | 7-3/4” | 3/8" |
7/8" | 8-1/4” | 3/8" |
1" | 8-3/4” | 3/8" |