SDS Drive System
NOTE: Only use accessories with SDS or SDS Plus shanks.
1.Unplug the tool.
2.Lightly grease the bit or chisel shank.
3.Insert the bit or chisel into the nose of the tool.
4.Rotate bit slowly until it aligns with the locking mechanism.
5.Push bit into tool until it locks.
6.Check that the bit is locked properly; it should be possible to pull the bit back and forth slightly (about 1/4”).
7.To remove bits and chisels, pull bit holder toward the rear of tool and remove bit.
NOTE: Use caution when handling hot bits and chisels.
6. Use only enough pressure to hold the tool in |
place, engage the hammering mechanism, |
and prevent the tip of the chisel from wander- |
ing. This tool has been designed to achieve top |
performance with only moderate pressure. Let |
the tool do the work. |
NOTE: To engage the hammering mechanism, |
maintain pressure on the bit/chisel. When pres- |
sure is released, hammering stops. |
7. To stop the tool, release the trigger. Make sure |
Power and Service Indicators
When the tool is plugged in, the Power Indicator will light. Unplug the tool before changing accessories or making adjustments.
When the tool is in need of service (for example, brushes need to be changed), the Service Indica- tor will light. Stop using the tool and return it to the nearest MILWAUKEE service facility for repairs.
Operating and Operator Force
OPERATION
the tool comes to a complete stop before laying |
the tool down. |
Position the tool, grasp the handles firmly and pull the trigger. Always hold the tool securely using both
WARNING To reduce the risk of injury, always unplug tool before attaching or remov- ing accessories or making adjustments. Use only specifically recommended accessories. Others may be hazardous. Keep hands away from the bit and all moving parts.
2. For hammering only, Fig. 3 turn the selector lever
to display the hammer symbol. (See "Selecting Hammering Speed")
Chiseling
When chiseling or chipping, hold the tool at an angle to the work area. For best performance, work from a corner or close the edge of the work and break off a small area at a time.
Drilling
handles to maintain control.
These hammers feature the
WARNING To reduce the risk of injury, wear safety goggles or glasses with side shields.
Electronic Feedback Control Circuit
These hammers have an Electronic Feedback Control Circuit (EFCC) which helps improve the operation and life of the tool. It allows the tool to maintain constant speed and torque between no- load and load conditions.
3. To freely rotate the bit Fig. 4 to the desired angle for chiseling only, turn the selector lever to display
the 0 symbol.
When drilling deep holes, the speed may begin to drop off. Pull the bit partially out of the hole while the tool is running to help clear dust.
NOTE: Do not use water to settle the dust since it will clog the bit flutes and tend to make the bit bind in the hole.
If a bit binds:
If the bit should bind, a built in, nonadjustable slip clutch prevents the bit from turning when the tool is held or braced securely. If this occurs
Excessive operator force compresses the handle too far and reduces the vibration dampening. Users will be able to feel the difference and should adjust the force to the handle accordingly.
A smooth, even flow of dust indicates the proper drilling rate. If the speed begins to drop off when drilling large or deep holes, pull the bit partially out of the hole while the tool is running to help clear dust. Do not use water to settle the dust since it will clog the bit flutes and tend to make the bit bind in the hole. If the bit should bind, a
Soft Start
The
WARNING To reduce the risk of injury, when using chisels or other
Selecting Mode |
|
1. For hammering with | Fig. 2 |
rotation, turn the selec- | |
tor lever to display the |
|
hammer and twist drill |
|
symbols. (Not available |
|
on Cat. No. |
|
Selecting Hammering Speed
1.To increase the Hammering speed (2840 blows per second), move the hammer speed control se- lector to the large hammer. Use the high hammer speed for harder materials, such as concrete.
2.To decrease the Hammering speed (2200 blows per second), move the hammer speed control selector to the small hammer. Use the low ham- mer speed for softer materials, such as brick.
Starting and Stopping
1.Insert the accessory
2.Select the mode and hammering speed.
3.Position the tool on the workpiece.
4.Grasp both handles firmly (trigger handle and either the spade handle or straight handle).
5.To start the tool, grasp the handles firmly and pull the trigger. Always hold the tool securely using two handles and maintain control.
1.Turn off and unplug the tool.
2.Free the bit from the workpiece.
3.Clear debris from the hole.
4.Begin drilling again.
If a hammer iron gets stuck:
1.Unplug the tool.
2.Pull out bit lock and rotate it 180°.
3.Pull the tool off of the stuck accessory.
4.Remove the accessory from the workpiece.
Locking Trigger (Cat. No. 5446-21 only)
1.To lock on the trigger, pull the trigger and press the lock button. Release the trigger.
2.To unlock the trigger, pull and release the trig- ger.
Do not let the bit spin in the hole without cutting. Do not attempt to drill through steel reinforcing rods. Both actions will damage the carbide.
Cold Hammering
If the hammer is stored for a long period of time or at cold temperatures, the lubrication may become stiff and the tool may not hammer initially or the hammering may be weak. If this happens:
1.Insert a chisel into the tool.
2.Pull the trigger and apply the chisel against a scrap piece of concrete.
3.Turn the tool On and Off every few seconds. After 15 seconds to 2 minutes, the tool will start hammering normally. The colder the hammer is, the longer it will take to warm up.
6 | 7 |
