Fig. 5
3.Insert the adapter into the nose of the tool (see “Installing Bits and Chisels”. Set the action selec- tor to the hammering-with-rotation setting.
4.Press the center pin firmly against your center mark, hold the tool firmly and pull the trigger (Fig. 6). NOTE: If a center
pin and guide plate are not available, use a template or notched board to start the hole (Fig. 7).
5.After drilling to about the depth of the core bit teeth, remove the center pin and guide plate from the core bit. Resume drilling.
6.To change the core bit, hold the tool
upwards, pointing it away from your body, and run the tool allowing rota- tion and impacting for about five sec- onds to loosen the core bit from the adapter shank. NOTE: To make deeper holes, re- move the core bit, break and remove the core. Resume drilling. When drill- ing long or deep
holes, after each inch of penetration pull the bit partially out of the hole while the tool is running, to help clear dust from the bit flutes. Dust can clog the bit flutes and can make the bit bind in the hole. If this occurs, stop the tool, free the bit and begin again.
Drilling Large Diameter Holes with Core Bits When drilling holes with large diameter core bits, dust may build up in the cut and can cause the tool to stall, bind, or cut slowly. By creating an opening for the dust to escape, drilling time, bit stress, and tool stress can be reduced.
1.Start the cut as normal.
2.Once the bit is firmly established in the cut (about 1/4" deep), remove the bit from the cut (Fig. 8).
3.Remove the bit from Fig. 8 the tool.
4.Install a standard flut- ed bit, approximately
7/8" in diameter, onto the tool.
5. Drill a perpendicular hole through the kerf of the large hole (Fig. 9).
•Depending on the location of the work, the hole should ei- ther break through the other side of the hole/floor or extend 4"-5" past the end of the workpiece (such as into the dirt below a concrete slab).
•If dust builds up in the hole, vacuum it out and continue drilling.
•If drilling through a wall, the hole for dust should be drilled on the lowest part of the large hole kerf (Fig.
9) as the dust will fall there when drilling and can be evacu- ated more easily.
6. Reinstall the core bit Dust and debris will fall
and continue drilling | through the hole. |
(Fig. 10 & 11). Dust Top view |
and debris will fall | | |
through the hole and | | |
Fig. 11 |
optimize the cutting | | |
| |
ability of the bit.
7.For core bits, once the maximum core bit
depth is drilled, the Side view core must be broken of slab and removed.
•Install a chisel bit.
•Place the chisel into the hole kerf (Fig. 12).
•Chisel down into the
kerf at several points until the core is loose or broken.
•Remove the core and vacuum/remove any remaining dust and debris.
•Install the core bit and continue the cut.
NOTE: If unable to drill a hole in the kerf, pull back on the bit with the ham- mer running (Fig. 13). This will remove some of the dust and debris from the cut. Repeat this for every inch of drilling. If necessary, vacuum
dust and debris from the cut and surrounding area.
Chiseling and Chipping
These MILWAUKEE Hammers may be used for chipping and chiseling.
When chiseling, hold the tool at an angle to the workpiece. Work from a corner or close to the edge of the workpiece, breaking off one small area at a time rather than attempting too large an area.
A variety of accessories are available.
Bushing Tools-Used to surface
concrete.
Mortar Cutting Chisels (Seam Tools)-For removing old mortar for tuck pointing or caulking.
Bull Points-For demolition work and starting holes in concrete slabs.
Flat Chisels-For edging, chipping or channeling.
Scaling Chisels-For removing weld spatter or scale and cutting straight lines.
Slotting Chisel-For slotting and cutting between drilled holes in concrete and masonry.
MAINTENANCE
WARNING To reduce the risk of injury, always unplug your tool before performing any maintenance. Never disassemble the tool or try to do any rewiring on the tool’s electrical system. Contact a MILWAUKEE service facility for ALL repairs.
Maintaining Tools
Keep your tool in good repair by adopting a regular maintenance program. Before use, examine the gen- eral condition of your tool. Inspect guards, switches, tool cord set and extension cord for damage. Check for loose screws, misalignment, binding of moving parts, improper mounting, broken parts and any other condition that may affect its safe operation. If abnormal noise or vibration occurs, turn the tool off immediately and have the problem corrected before further use. Do not use a damaged tool. Tag damaged tools “DO NOT USE” until repaired (see “Repairs”). Under normal conditions, relubrication is not neces- sary until the motor brushes need to be replaced. After six months to one year, depending on use, return your tool to the nearest MILWAUKEE service facility for the following:
•Lubrication
•Brush inspection and replacement
•Mechanical inspection and cleaning (gears, spindles, bearings, housing, etc.)
•Electrical inspection (switch, cord, armature, etc.)
•Testing to assure proper mechanical and electrical operation
Maintaining Hammer Chisels
Through normal use, the shank of the chisel can "mushroom" over and cause the chisel to become stuck inside the hammer. To prevent this from hap- pening, periodically remove the chisel from the tool and inspect the shank. If the shank starts to "mush- room", have the chisel refurbished or replaced.
Brush Replacement
These MILWAUKEE hammers are will automatically shut off when the brushes need to be replaced. Re- turn your tool to the nearest MILWAUKEE service facility for repairs.
Service Indicator Light
These MILWAUKEE Hammers feature a service indicator light. When the red light turns on, the tool is in need of servicing. Return your tool to the nearest MILWAUKEE service facility for service.
NOTE: When the service light comes on, the tool will continue to run for a few hours and then the motor will shut off.
WARNING To reduce the risk of injury, electric shock and damage to the tool, never immerse your tool in liquid or allow a liquid to flow inside the tool.
Cleaning
Clean dust and debris from vents. Keep the tool handles clean, dry and free of oil or grease. Use only mild soap and a damp cloth to clean your tool since certain cleaning agents and solvents are harmful to plastics and other insulated parts. Some of these include: gasoline, turpentine, lacquer thinner, paint thinner, chlorinated cleaning solvents, ammonia and household detergents containing ammonia. Never use flammable or combustible solvents around tools.
Repairs
If your tool is damaged, return the entire tool to the nearest service center.
ACCESSORIES
WARNING To reduce the risk of injury, always unplug the tool before attaching or removing accessories. Use only specifically recommended accessories. Others may be hazardous.
For a complete listing of accessories refer to your MILWAUKEE Electric Tool catalog or go on-line to www.milwaukeetool.com. To obtain a catalog, contact your local distributor or a service center.
Thick Wall Carbide-Tipped Core Bits
Core Body with Guide Plate and Centering Pin
Cat. No. | Diameter | Drilling Depth |
48-20-5125 | 1-1/2" | 4-1/16" |
48-20-5130 | 1-3/4" | 4-1/16" |
48-20-5135 | 2" | 4-1/16" |
48-20-5140 | 2-1/2" | 4-1/16" |
48-20-5145 | 3" | 4-1/16" |
48-20-5150 | 3-1/2" | 4-1/16" |
48-20-5155 | 4" | 4-1/16" |
48-20-5160 | 5" | 4-1/16" |
48-20-5165 | 6" | 4-1/16" |
NOTE: Use MILWAUKEE core bits Cat. No. 48-20- 5125 through 48-20-5165. Do not use LHS (Large Hole System) Components with rotary hammers 5340-20 and 5342-20. The bits could fail, breaking apart at the threaded stud and causing injury and property damage.
