V E N T A S : TIENDA CENTRO I S A B E L L A C A T O L I C A 96 E S Q . S A N J E R O N I M O C P 06080 M E X I C O D . F . A P D O . P O S T A L 1841 C P 06000 M E X I C O D . F . T E L E X : T E L E X : 709-4100 709-5216 1776374 L W S A M E 1760041 L W S A M E TABLA D E BROCAS RECOMENDADAS PARA MACHUELO H I L O S x BROCA MACHUELO PASO MACHUELEAR MEDIDAS DE MILIMETRICA FRACCIONAL B R O C A TABLAS DE CONSULTA MACHUELO HILOSx B R O C A 64NS 48NS 40NS 32NS 36NS 3/64 49 38 1/8 30 1. 1.2 1.4 1.5 1.7 .25 .25 .30 .35 .35 .75 .95 1.10 1.10 1.35 0 1 1 2 2 80NF 64NC 72NF 56NC 64NF 3/64 53 53 50 49 3/16 3/16 7/32 7/32 1/4 24NS 32NS 24NS 32NS 20NC 26 22 16 12 7 2.0 2.3 2.5 2.6 3.0 .40 .40 .45 .45 .50 1.60 I. 90 2.00 2.10 2.50 3 3 4 4 4 48NC 56NF 36NS 40NC 48NF 46 45 44 43 42 1/4 5/16 5/16 3/8 3/8 28NF 18NC 24NF 16NC 24NF 3 F I 5/16 Q 3.5 4.0 4.5 5.0 5.5 .60 .70 .75 .80 .90 2.90 3.30 3.75 4.20 4.60 5 5 6 6 8 40NC 44NF 32NC 40NF 32NC 38 37 36 33 29 7/16 7/16 1/2 1/2 9/16 14NC 20NF 13NC 20NF 12NC U 251,64 27/64 29/64 31/64 6.0 7.0 8.0 9.0 10.0 1.00 1.00 1.25 1.25 1.50 5.00 6.00 6.80 7.80 8.60 8 10 10 12 12 36NF 24NC 32NF 24NC 28NF 29 25 21 16 14 9/16 5/8 5/8 11/16 11/16 18NF 11NC 18NF 11NS 16NS 33/64 17/32 37/64 19/32 5/8 11.0 12.0 13.0 14.0 15.0 1.50 1.75 1.75 2.00 2.00 9.60 10.50 I I . 50 12.00 13.00 14 14 20NS 24NS 10 7 3/4 3/4 13/16 7/8 7/8 10NC 16NF 10NS 9NC 14NF 21/32 11/16 23/32 49/64 13/16 16.0 17.0 18.0 19.0 20.0 2.00 2.00 2.00 2.50 2.50 14.00 15.00 16.00 16.50 17.50 7/8 15/16 1 1 1.1/8 18NS 9NS 8NC 14NF 7NC 53/64 53/64 7/8 15/16 63/64 22.0 24.0 2.50 3.00 19.50 21.00 1.1/8 1.1/4 1.1/4 1.3/8 1.3/8 12NF 7NC 12NF 6NC 12NC 1. 3 / 6 4 1. 7/64 1.11/64 1.13/64 1.19/64 1.1/2 1.1/2 1.5/8 1.3/4 1.7/8 ¡6NC H2NF 5J1/2NS 4NC 5NS 1.11/32 1.27/64 1.29/64 1. 9 / 1 6 1.11/16 1/2NC 1.25/32 F O R M U L A S P A R A DEL Y TAMBIEN: DIAM. BARRENO - B A R R E N O O B T E N E R N E C E S A R I O E L P A R A DIAM, MAYOR DE ROSCA -0.01299x PORC. D E ROSCA NO. HILOS/PULGADA DIAM. MAYOR D E C D A . -(.6495 x paso TUBO H I L O S X B R O C A PULGADA 1/16 3/32 1/8 5/32 5/32 BARRENO MACHUELO PULGADA PULGADA DIAM. P A R A TORNILLO 1/16 1/8 1/4 3/8 1/2 27 27 18 18 14 D 11/32 7/16 37/64 23/32 3/4 1.1/4 1.1/2 2 14 11.5 11.5 11.5 11.5 2.1/2 3 3.1/2 4 8 8 8 8 59/64 1.5/32 1.1/2 1.47/64 2.7/32 2.5/8 3.1/4 3.3/4 4.1/4 DIAMETRO M A C H U E L E A R x p o r a d e rosca x 2) PARA U N PORCENTAJE D E ROSCA D E L70%A L 75%APROXIMADAMENTE, S E PUEDE UTILIZAR L A SIGUIENTE FORMULA: DIAM. MAYOR DE ROSCA - PASO DIAM. BARRENO FORMULA PARA OBTENER E L PORCENTAJE DE ROSCA ABIERTO E N UN BARRENO DE DIAMETRO DETERMINADO. PORCENTAJE D E ROSCA. = N O . HILOS/PULG. x (DIAM. M A Y O R D E ROSCA - DIAM. D E BROCA SELECCIONADO) .01299 477