Operating Tips; Tools And Accessories - Kress 550 HMSL Original Bedienungsanleitung

20 English
The dust protection cap 2 largely prevents the
penetration of drilling dust during operation. When
inserting the tool, take care that the dust protec-
EN
tion cap 2 is not damaged.
A damaged dust protection cap should be changed
immediately. It is recommend to have this carried
out by an after-sales service.
The tool holder retains the drill bit or chiselling tool
in a SDS-plus holder without additional equipment.
Inserting the tool
Clean and grease the tool shaft slightly.
Retract the unlocking sleeve I.
Insert the tool into the tool holder by turning it until
it snaps into place. 1
Release the unlocking sleeve I.
Check the interlock by pulling the tool.
-NOTE-
In devices with SDS-plus automatic interlocking,
the unlocking sleeve must not be retracted when
inserting the tool.
Manual SDS-plus interlock
SDS-plus automatic interlock
Removing the tool
Pull the unlocking sleeve I backwards and remove
the tool.

Operating tips

Use auxiliary handles supplied with
the tool.
Loss of control can cause personal
injury.
Always match the speed setting to the material
concerned and the diameter of the drill bit.
Hammer drilling - Chiselling
Wear protective glasses and hearing
protection.
Do not apply too much pressure. The performance
is not increased by doing so.
The most effective method for chiselling is to break
out only small pieces of material.
BH-EN / 1011
Drilling in tiles
Start drilling slowly on the tile. Only
after the tile is drilled through, switch
to hammer drilling.
This prevents the tile from cracking.
Drilling with diamond drill bits
Set the operation mode switch II to drilling.
-NOTE-
Switch the hammer action off when drilling with a
diamond drill bit.
Screws
The screw adapter 6 (accessory) can hold screw
bits.
Commercially available bits with a hexagonal di-
mension of 6.3 mm or 1/4" (DIN 3126, Form C) can
be used. The screw-bits are held in the adapter
with a spring ring. Therefore, use only bits with a
notch.
Set the operation mode switch II to drilling.

5. Tools and accessories

For metal, use only flawless, sharpened drills; for
stone and concrete, only rock drills with hard metal
inserts.
Sharpening the chisels
Good results are only achieved with sharp chisels,
therefore sharpen the chiselling tools in due time.
This prolongs the service life of the tools and en-
sures good working performance.
Sharpen chiselling tools with grinding wheels (e.g.
ceramic bonded corundum wheel) with a steady
supply of water. Standard values for this are shown
in the illustrated instructions. Take care that no an-
nealing colouration appears on the cutting edges,
otherwise the hardness of the chiselling tools will
be impaired.
Use keyless drill chuck
Drill bits with a cylindrical shaft are used for drilling
in metal, wood and plastic. A keyless drill chuck
(max. 13 mm clamping diameter) is available for
this purpose.
-NOTE-
The keyless chuck is not suited for hammer drill-
ing and chiselling.
Tools and accessories