Bosch 24614 Specifications download pdf (Page 14)

Operating Tips

You will extend the life of your bits and do

neater work if you always put the bit in

contact with the work before pulling the

trigger. During the operation, hold the tool

firmly and exert light, steady pressure. Too

much pressure at low speed will stall the tool.

Too little pressure will keep the bit from

cutting and cause excess friction by sliding

over the surface. This can be damaging to

both tool and bit.

DRIVING WITH VARIABLE SPEED

The technique is to start slowly, increasing

the speed as the screw runs down. Set the

screw snugly by slowing to a stop. Prior to

driving screws, pilot and clearance holes

should be drilled.

Always hold the machine straight on the bolt

to be tightened.

The best method to determine the right

impacting/tightening duration is by means of

a trial. For small screws, the right

impacting/tightening duration can be reached

in less then 0.5 Sec. Therefore, work with

low RPM and switch the machine off

immediately when the screw is tight and the

impacting sound can be heard.

For screwing larger, longer wood screws into

hard material, pre-drilling is the best method.

TIGHTENING TORQUE

(Models 24614 & 24618 only)

The tightening torque depends on the

duration of the impacting/tightening action.

The largest tightening torque is achieved

after approx. 6 to 10 Sec. impacting/

tightening action.

The torque build-up depends on the

following factors:

• Hardness of the bolts/nuts.

• Type of washer (disk washer, spring

washer, seal).

• Hardness of the material to be joined.

• Lubricating effect at the surfaces of the

junction.

This leads to the following application cases:

Hard case: The joining of metal to metal with

a disk washer. The maximum torque is

reached after a relative short impacting/

tightening action.

Medium case: The joining of metal to metal

where spring ring washer, disk spring

washer, stud bolts or bolts/nuts with conical

seats are used.

Soft case: The joining of e.g. metal to wood

or insulation material.

For middle or soft joining cases, the

maximum tightening torque is less as for

hard cases. Therefore, a longer impacting/

tightening action is necessary to arrive at the

maximum tightening torque.

FASTENING WITH SCREWS

This procedure shown in (Fig. 9) will enable

you to fasten materials together with your tool

without stripping, splitting or separating the

material.

First, clamp the pieces together and drill the

first hole 2/3 the diameter 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 fiat 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.

I1=[_1

-14-

FASTENING

WITH SCREWS

(

\ N _ 3

1, Drill2/3diameterand t "

2/3 of screw length for _ _

soft materials, full / ]

length for hard " I

m_terials, t I

2. Drill same

diameter as

screw shank.

Countersink

same diameter

as screw head.

Apply a slight / _: !

even pressure

when driving

screws.

Screw

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 46 47

Comments to this Manuals

No comments