Portable Drills.pdf

Portable Drills         Corded or cordless o Corded drills are now rare – older models or heavy-duty drills Keyed or keyless Jacob’s Chuck o 3/8” or ½” Heavy duty o Slower RPM o Larger bits Hammer drill o Moves in and out while drilling  Not an impact driver o Used with masonry bits Variabl...

Portable Drills         Corded or cordless o Corded drills are now rare – older models or heavy-duty drills Keyed or keyless Jacob’s Chuck o 3/8” or ½” Heavy duty o Slower RPM o Larger bits Hammer drill o Moves in and out while drilling  Not an impact driver o Used with masonry bits Variable speed o Drilling holes on high o Driving screws on low Chucks can be replaced Brushes complete the circuit o Need replacing after a while  When about ¼” left Off-set chuck o Allows to get into corners