MasterForce 241-0415 Manual del operador descargar pdf (Pagina 13)

Page 12

OPERATION

INSTALLING AND REMOVING

SOCKET (FIG. 5)

1. Lock the trigger switch by placing

the direction-of-rotation Selector in

the OFF (center) position.

2. To install a 1/2" socket, simply push

it completely onto the output drive.

To remove, pull it off the output drive.

FIG. 5

WARNING:

Only use sockets

designed for impact wrenches. Sockets

not designed for impact wrenches could

break and result in user injury. Inspect

sockets prior to use to ensure that they

have no cracks or other visible damage.

TIGHTENING AND

LOOSENING BOLTS

A hex socket matching the bolt or nut must

ﬁrst be selected. Then mount the socket

on the output drive, and grip the nut to be

tightened with the hex socket. Hold the

wrench in line with the bolt; press the trigger

switch to impact the nut for several seconds.

If the nut is only loosely ﬁtted to the bolt, the

bolt may turn with nut, therefore mistaking

proper tightening. In this case, stop impact

on the nut and hold the bolt head with a

wrench before restarting impact, or

manually tighten the bolt and nut to

prevent them slipping.

TIGHTENING TORQUE

The tightening torque depends on the

duration of the impacting/tightening action.

The greatest tightening torque is achieved

after approximately 3-5 seconds of

impacting /tightening action.

The torque build-up depends on the

following factors:

1. Hardness of the bolts/nuts.

2. Type of washer (disk washer, spring

washer, seal).

3. Hardness of the material to be joined.

4. Lubricating effect at the surface of the

junction.

For example:

A relatively short interval of impacting/

tightening action is required when joining

metal to metal with a disk washer.

A moderate interval of impacting/tightening

action is required when joining metal to

metal where a spring-ring washer,

disk-spring washer, stud bolt, or bolt/ nut

with conical seats are used.

A longer interval of impacting/ tightening

action is necessary to arrive at the

maximum tightening torque when joining

metal to wood or insulation material.

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