Bosch 1644-24 Specifications download pdf (Page 7)

STROKE LENGTH/LOCK-OFF SWITCH

Your tool is equipped with a dual stroke-

length / lock-off switch located on the top of

the saw. This lever is designed for choosing

the stroke length and for locking the trigger in

the "OFF" position to help prevent accidental

starts and accidental battery discharge. The

tool should be at a complete stop before

changing stroke lengths. For the 3/4" (19 mm)

stroke, move the switch to the far left. For the

1-1/4" (32 mm) stroke, move the switch to the

far right. To activate the trigger lock, move the

switch to the center position (Fig 2).

The 1-1/4" (32 mm) stroke is useful for fast,

aggressive cutting, especially in wood.

The 3/4" (19 mm) stroke offers a wide

variety of benefits:

• Reduced vibration of workpiece when

cutting thin or fragile workpiece materials,

such as sheet metal, thin plywood, or

plaster-and-lath walls.

• Reduced depth-of-cut and blade projection

beyond the far edge of the workpiece, such

as when cutting into a wall or when cutting

a pipe that runs along a wall.

• Easier pocket/plunge cutting.

• Precise starts of cuts.

• Increased pulling power (like a drill has

more torque in low gear).*

• Less heat from lower blade travel speed,

thus longer blade life.*

*These characteristics are especially

beneficial when cutting metal.

BRAKE

When the trigger switch is released it

activates the brake to stop the saw quickly.

This is especially useful when making

repetitive cuts.

VARIABLE SPEED CONTROLLED

TRIGGER SWITCH

Your tool is equipped with a variable speed

controlled trigger switch. The tool can be

turned "ON" or "OFF" by squeezing or

releasing the trigger. The blade plunger

stroke rate can be adjusted from the

minimum to maximum nameplate stroke rate

by the pressure you apply to the trigger.

Apply more pressure to increase the speed

and release pressure to decrease speed.

Higher speed settings are generally used for

fast cutting or when softer cutting materials

such as wood, composite materials, and

plastics. Slower speed settings are generally

used when precision is required or when

cutting harder materials. Materials typically

cut using slower speeds include sheet metal,

conduit, and pipe.

-7-

Operating Instructions

Preparing the Saw

FIG. 2

BLADE SELECTION

No one blade can be efficient on all cutting

jobs. Different materials require specially

designed blades. Since your reciprocating

saw can cut so many materials, many types

of BOSCH blades are available. Be sure to

use the proper blade to insure proper cutting

performance.

BM 2610917685 9-02 9/23/02 11:35 AM Page 7

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