Milwaukee 1680-21, 1680-20 manual Operation

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OPERATION

Bracing for reverse rotation

Fig. 8

WARNING To reduce the risk of injury, wear safety goggles or glasses with side shields.

WARNING To reduce the risk of per- sonal injury when drilling, hold the tool by isu- lated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or its own cord. Contact with a "live" wire will make exposed metal parts of the tool "live" and shock the operator

WARNING To reduce the risk of injury, hold or brace securely. Always be prepared for bit binding and drill reaction.

Keep selfeed bits aligned with the work surface so bits go in straight (see "Drilling").

Avoid drilling warped, wet, knotty, and/or pitchy material if possible.

Avoid drilling in material that you suspect contains hidden nails or other things that may cause the bit to bind.

The direction of reaction is always opposite of the direction of bit rotation. Reaction is even more likely to occur when enlarging already existing holes and at the point when the bit breaks through the other side of the material.

If the bit does bind:

1.Release the trigger immediately.

2.Reverse the motor.

3.Remove the bit from the work and start again.

4.Do not pull the trigger on and off to attempt to start a stalled bit. This will damage the drill.

Fig. 6

C

B

A

Fig. 7

D

 

Reversing

A reversing switch is located opposite the trigger switch for removal of bits from holes. Permit the motor to come to a complete stop before reversing. Reversing the tool with the gears in motion may cause severe damage. When removing selfeed bits from partially drilled holes, flick the trigger switch when the tool is in reverse to free the threaded pilot screw. When the threads are loose, lift the bit from the workpiece with the motor stopped.

Clutch

The Super Hawghas a clutch that is active when the tool is running in low speed only. The clutch disengages the bit from the geartrain to protect

Bracing for forward rotation

When drilling in forward, the bit will rotate in a clockwise direction. If the bit binds in the hole, the bit will come to a sudden stop and drill will suddenly react in a counterclockwise direction.

B

A

WARNING To reduce the risk of injury, keep hands and cord away from the bit and all moving parts.

the tool. When a high load is encountered, the clutch will slip and a ratcheting sound will be heard. Release the trigger switch when the clutch begins to slip (see "Bit Binding"). Continuous use of the tool when the clutch is slipping will reduce the life of the mechanism.

Bit binding

If the bit binds, the drill will suddenly react in the opposite direction of the rotation of the bit. Figure 3 shows the path of reaction, (B) if the drill bit binds while being driven in forward (A). Reduce the chances of a sudden reaction by following the instructions listed below. Prepare for a sudden reaction by holding or bracing securely.

Fig. 3

B

A

To reduce the chance of bit binding:

Use sharp bits. Sharp bits are less likely to bind when drilling.

Use the proper bit for the job. There are many types of bits designed for specific purposes.

Use the proper speed for the size bit. Larger bits should be run at the lower speed (see "Speci- fications"). Driving larger bits at high speeds will increase the chance of the bit binding and increase the chance of reaction.

There are two ways to properly brace the Super Hawgfor forward rotation (Fig. 4 & 5).

A.Forward (clockwise) rotation

B.Reaction

C.Brace drill with side handle here

D.Brace drill with gearcase here

If the bit binds, the side handle or the gearcase braced against the stud will hold the drill in position.

Fig. 4

C

B

A

Fig. 5

D

A

B

When drilling in reverse, the bit will rotate in a counterclockwise direction. If the bit binds in the hole, the bit will come to a sudden stop and the drill will suddenly react in a clockwise direction.

There are two ways to properly brace the Super Hawgfor reverse rotation (Fig. 6 & 7).

A.Reverse (counterclockwise) rotation

B.Reaction

C.Brace drill with side handle here

D.Brace drill with motor gearcase here

If the bit binds, the side handle or the gearcase braced against the stud will hold the drill in position.

Shifting Speeds

WARNING To reduce the risk of injury and damage to the tool, shift speeds only when the drill is at a stop. The shift knob is located near the chuck and should not be shifted while the chuck is moving.

Use the shift knob to select High or Low speed (Fig. 8). High speed (1750 RPM) is the low torque setting. Low speed (450 RPM) is the high torque setting. See the "Specifications" section for bit capacity limits under high and low speeds.

Always turn off the switch and shift speeds while the tool is stopped. Never shift the drill while it is moving or when it is under load.

NOTE: The clutch is active in low speed only.

Starting, Stopping and Controlling Speed

1.To start the tool, pull trigger switch.

2.To stop the tool, release the trigger switch.

Drilling

WARNING To reduce the risk of explo- sion, electric shock and property damage, always check the work area for hidden pipes and wires before drilling.

1.Before drilling, be sure the workpiece is clamped securely. A poorly secured piece of material may result in personal injury or inaccurate drilling. Use backing material to prevent damage to the workpiece during breakthrough. When drilling in light gauge metal or wood, use a wooden block to back up the material to prevent damage to the workpiece.

2.When starting a hole, place the drill bit on the work surface and apply firm pressure.

To start a selfeed bit, run the threaded feed screw into the work by flicking the trigger switch, permitting the bit to coast until the teeth contact the work surface. Align the bit properly before proceeding. This will reduce cocking and jam- ming when starting.

When drilling in metal, mark the center of the hole to be drilled with a center punch to give the bit a start and to prevent it from "walking." Lubricate the drill bit with cutting oil when drilling iron or steel. Use a coolant when drilling nonferrous metals such as copper, brass or aluminum.

6

7

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Contents Operators Manual General Power Tool Safety Warnings Specific Safety RulesSymbology Work Area SafetyGrounding Extension Cords Assembly Operation Limited Warranty USA and Canada Accessories MaintenanceLimited Warranty MEXICO, Central America and Caribbean Sécurité DU Lieu DE Travail Sécurité ÉlectriqueSécurité Individuelle Utilisation ET Entretien DE L’OUTIL ÉlectriqueMise a LA Terre Cordons DE RallongeSpécifications Montage DE L’OUTILManiement Accesoires Seguridad EN EL Área DE Trabajo Seguridad EléctricaUSO Y Cuidado DE LAS Herramientas Eléctricas Seguridad PersonalMantenimiento Reglas Especificas DE SeguridadSimbología Descripcion FuncionalEnsamblaje DE LA Herramienta EspecificacionesOperacion Para reducir la posibilidad de atoramiento de la broca Si la broca se atoraApoyo para rotación en dirección de avance Cambio de velocidadesAccesorios Garantía Limitada E.U.A. Y CanadáCall 1-800-SAWDUST Fax 800.729.3878West Lisbon Road Brookfield, Wisconsin, U.S.A

1680-21, 1680-20 specifications

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