Bosch Power Tools PS32BN Drilling with Variable Speed, Driving with Variable Speed, Drill Bits

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2610031969 09-13_2610031969 09-13.qxp 10/3/13 10:50 AM Page 12

DRILLING WITH VARIABLE SPEED

The trigger controlled variable speed feature will eliminate the need for center punches in hard materials. The variable speed trigger allows you to slowly increase RPM. By using a slow starting speed, you are able to keep the bit from “wander ng”i. You can increase the speed as the bit “bites” into the work by squeezing the trigger.

DRIVING WITH VARIABLE SPEED

Variable speed drills will double as a power screwdriver by using a screwdriver bit in the drill mode. The technique is to start slowly, increasing the speed as the screw runs down. Set the screw snug yl by slowing to a stop. Prior to driving screws, pilot and clearance holes should be drilled.

FASTENING WITH SCREWS

This procedure shown in (Fig. 10) will enable you to fasten ma terials together with your Cordless Drill/Screwdriver without stripping, splitting or separating the material.

Screw drills are available for screw sizes No. 6, 8, 10 and 12.

DRILL BITS

Always inspect drill bits for excessive wear. Use only bits that are sharp and in good condition.

TWIST BITS: Available with straight and reduced shanks for wood and light duty metal drilling. High speed bits cut faster and last longer on hard ma erialst.

CARBIDE TIPPED BITS: Used for drilling stone, con crete, plaster, cement and other unusually hard nonmetals. Use continuous heavy feed pres sure when employing carbide tip bits.

DRILLING WOOD

Be certain workpiece is clamped or anchored firm yl. Always apply pressure in a straight line with the drill bit. Maintain enough pressure to keep the drill “biting”.

When drilling holes in wood, twist bits can be used. Twist bits may overheat unless pulled out frequently to clear chips from flutes.

FASTENING

WITH SCREWS

1.  Drill 2/3 diameter and 2/3 of screw length for soft materials, full length for hard materials.

Screw

Apply a slight even pressure when driving screws.

2.  Drill same diameter as screw shank.

3.  Countersink same diameter as screw head.

Adjustable

Screw

Drill

Use a “back-up” block of wood for work that is likely to splinter, such as thin materials.

You will drill a cleaner hole if you ease up on the pressure just before the bit breaks through the wood. Then complete the hole from the back side.

DRILLING METAL

There are two rules for drilling hard materials. First, the harder the material, the greater the pres sure you need to apply to the tool. Second, the harder the material, the slower the speed. Here are a couple of tips for drilling in metal. Lubri cate the tip of the bit occasionally with

FIG. 10

First, clamp the pieces together and drill the first hole 2/3 the diam eter of the screw. If the material is soft, drill only 2/3 the proper length. If it is hard, drill the entire length.

Second, unclamp the pieces and drill the second hole the same diameter as the screw shank in the first or top piece of wood.

Third, if flat head screw is used, countersink the hole to make the screw flush with the surface. Then, simply apply even pressure when driving the screw. The screw shank clearance hole in the first piece allows the screw head to pull the pieces tightly together.

The adjustable screw drill accessory will do all of these oper ations quickly and easily.

cutting oil except when drilling soft metals such as alu minum, cop per or cast iron. If the hole to be drilled is fairly large, drill a smaller hole first, then enlarge to the required size, it’s often faster in the long run. Main tain enough pressure to assure that the bit does not just spin in the hole. This will dull the bit and greatly shorten its life.

RUNNING NUTS AND BOLTS

Variable speed control must be used with caution for driving nuts and bolts with socket set attach ments. The technique is to start slowly, increasing speed as the nut or bolt runs down. Set the nut or bolt snugly by slowing the drill to a stop. If this procedure is not followed, the tool will have a tendency to torque or twist in your hands when the nut or bolt seats.

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Contents Read Before Using Leer antes de usarSee Ver la páginaGeneral Power Tool Safety Warnings Work area safetyElectrical safety Personal safetySafety Rules for Cordless Drill/Drivers Battery tool use and careService Additional Safety Warnings Symbols Name Designation/ExplanationSymbols Functional Description and Specifications Cordless Drill/DriverRubberized Grip Battery Release Tabs Maximum CapacitiesAssembly Variable Speed Controlled Trigger Switch Operating InstructionsProtection Against Deep Discharging BrakeOperating Tips Drilling with Variable Speed Driving with Variable SpeedFastening with Screws Drill BitsMaintenance CleaningSécurité du lieu de travail Sécurité électriqueConsignes de sécurité pour perceuses/tournevis sans cordon Utilisation et entretien des outils ÉlectroportatifsUtilisation et entretien des outils à piles EntretienAvertissements supplémentaires concernant la sécurité Le plomb provenant des peintures à base de plombSymboles Symbole Nom Désignation/ExplicationSymboles suite Description fonctionnelle et spécifications Perceuse/visseuse sans filPS22 Tension nominale Assemblage Consignes de fonctionnement Changement DE Vitesses Embrayage ReglableÉclairage D’APPOINT Intégré Témoins Détat DE Charge DES PilesPerçage À Vitesse Variable Enfoncement À Vitesse VariableFixation À L’AIDE DE VIS ForetsEntretien Cordons de rallongeNettoyage Seguridad del área de trabajo Seguridad eléctricaUso y cuidado de las herramientas Mecánicas Uso y cuidado de las herramientas Alimentadas por baterías Servicio de ajustes y reparacionesAdvertencias de seguridad adicionales Símbolos Símbolo Nombre Designación/explicaciónSímbolos continuación Descripción funcional y especificaciones Taladro/destornillador sin cordónCambiador DE Engranajes Clip DE Cinturón Y Ensamblaje Instrucciones de funcionamiento Interruptor Gatillo DE Velocidad Variable ControladaFreno Palanca DE AVANCE/INVERSIÓN Y Cierre DEL GatilloConsejos de funcionamiento Sujecion CON Tornillos Brocas Para TaladroTaladrado DE Madera Taladrado DE MetalMantenimiento Cordónes de extensiónServicio Limpieza2610031969 09-132610031969 09-13.qxp 10/3/13 1050 AM Remarques Notas 2610031969