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Bosch Hd192 Manual

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    							IMPORTANT: IMPORTANT : IMPORTANTE:
    Read Before Using Lire avant usage Leer antes de usar
    For English Version Version françaiseVersión en español
    See page 2 Voir page 12Ver la página 22
    OperatingôbSafety Instructions
    Consignes de fonctionnementôbsécurité
    Instrucciones de funcionamiento y seguridad
    1877BOSCH99 (1877ô42672499)   www.boschtools.com
    Call Toll Free for
    Consumer Information & Service Locations Pour obtenir des informations
    et les adresses de nos centres de service aprèsvente,
    appelez ce numéro gratuit Llame gratis para
    obtener información
    para el consumidor y
    ubicaciones de servicio
    HD192
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    							2
    Work area safety
    Keep work area clean and well lit. Cluttered
    or dark areas invite accidents\b
    \fo  not  operate  power  tools  in  explosive
    atmospheres,  such  as  in  the  presence  of
    flammable  liquids,  gases  or  dust.  Power
    tools  create  sparks  which  may  ignite  the  dust
    or fumes\b
    Keep  children  and  bystanders  away  while
    operating  a  power  tool.  Distractions  can
    cause you to lose control\b
    Electrical safety
    Power  tool  plugs  must  match  the  outlet.
    Never  modify  the  plug  in  any  way.  \fo  not
    u s e   a n y   a d a p t e r   p l u g s   w i t h   e a r t h e d
    (grounded)  power  tools.  Unmodified  plugs
    and matching outlets will reduce risk of electric
    shock\b
    Avoid body contact with earthed or grounded
    surfaces  such  as  pipes,  radiators,  ranges
    and  refrigerators.  There  is  an  increased  risk
    of  electric  shock  if  your  body  is  earthed  or
    grounded\b
    \fo  not  expose  power  tools  to  rain  or  wet
    conditions.  Water  entering  a  power  tool  will
    increase the risk of electric shock\b
    \fo not abuse the cord. Never use the cord
    for carrying, pulling or unplugging the power tool.  Keep  cord  away  from  heat,  oil,  sharp
    edges or moving parts.  Damaged or entangled
    cords increase the risk of electric shock\b
    When  operating  a  power  tool  outdoors,
    use an extension cord suitable for outdoor
    use.  Use  of  a  cord  suitable  for  outdoor  use
    reduces the risk of electric shock\b
    If  operating  a  power  tool  in  a  damp  location is  unavoidable,  use  a  Ground  Fault  Circuit
    Interrupter  (GFCI)  protected  supply.  Use of
    an GFCI reduces the risk of electric shock\b
    Personal safety
    Stay  alert,  watch  what  you  are  doing  and
    u s e   c o m m o n   s e n s e   w h e n   o p e r a t i n g   a power  tool.  \fo  not  use  a  power  tool  while
    you are tired or under the influence of drugs,
    alcohol or medication.  A moment of inattention
    while  operating  power  tools  may  result  in
    serious personal injury\b
    Use  personal  protective  equipment.  Always
    wear  eye  protection.  Protective  equipment
    such as dust mask, nonskid safety shoes, hard
    hat, or hearing protection used for appropriate
    conditions will reduce personal injuries\b
    Prevent  unintentional  starting.  Ensure  the
    s w i t c h   i s   i n   t h e   o f f - p o s i t i o n   b e f o r e
    connecting to power source and / or battery
    p a c k ,   p i c k i n g   u p   o r   c a r r y i n g   t h e   t o o l .
    Carrying  power  tools  with  your  finger  on  the
    switch  or  energizing  power  tools  that  have  the
    switch on invites accidents\b
    Remove any adjusting key or wrench before
    turning  the  power  tool  on.  A  wrench  or  a
    key  left  attached  to  a  rotating  part  of  the
    power tool may result in personal injury\b
    \fo not overreach. Keep proper footing and
    balance  at  all  times.  This  enables  better
    c o n t r o l   o f   t h e   p o w e r   t o o l   i n   u n e x p e c t e d
    situations\b
    \fress properly. \fo not wear loose clothing
    or  jewelry.  Keep  your  hair,  clothing  and
    gloves  away  from  moving  parts.  Loose
    clothes,  jewelry  or  long  hair  can  be  caught  in
    moving parts\b
    If  devices  are  provided  for  the  connection
    of  dust  extraction  and  collection  facilities,
    ensure  these  are  connected  and  properly
    used.  Use  of  dust  collection  can  reduce  dust
    related hazards\b
    Power tool use and care
    \f o   n o t   f o r c e   t h e   p o w e r   t o o l .   U s e   t h e
    correct power tool for your application.  The
    correct  power  tool  will  do  the  job  better  and safer at the rate for which it was designed\b
    \fo not use the power tool if the switch does
    not  turn  it  on  and  off.  Any  power  tool  that
    c a n n o t   b e   c o n t r o l l e d   w i t h   t h e   s w i t c h   i s dangerous and must be repaired\b
    Read  all  safety  warnings  and  all  instructions. 
    Failure  to  follow  the  warnings
    and instructions may result in electric shock, fire and/or serious injury\b
    SAVE ALL WARNINGS AN\f INSTRUCTIONS FOR FUTURE REFERENCE
    The  term  “power  tool”  in  the  warnings  refers  to  your  mainsoperated  (corded)  power  tool  or
    batteryoperated (cordless) power tool\b
    !WARNING
    General Power Tool Safety Warnings
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    							ôf
    \fisconnect the plug from the power source
    and/or the battery pack from the power tool
    before  making  any  adjustments,  changing
    accessories,  or  storing  power  tools.  Such
    preventive  safety  measures  reduce  the  risk  of
    starting the power tool accidentally\b
    Store  idle  power  tools  out  of  the  reach  of
    children and do not allow persons unfamiliar
    with the power tool or these instructions to
    operate  the  power  tool.  Power  tools  are
    dangerous in the hands of untrained users\b
    Maintain power tools. Check for misalignment
    or  binding  of  moving  parts,  breakage  of
    parts  and  any  other  condition  that  may
    affect the power tool’s operation. If damaged,
    have  the  power  tool  repaired  before  use.
    M a n y   a c c i d e n t s   a r e   c a u s e d   b y   p o o r l y
    maintained power tools\b Keep cutting tools sharp and clean. 
    Properly
    maintained  cutting  tools  with  sharp  cutting
    edges are less likely to bind and are easier to
    control\b
    Use  the  power  tool,  accessories  and  tool
    bits etc. in accordance with these instructions,
    taking into account the working conditions
    and  the  work  to  be  performed.  Use  of  the
    power  tool  for  operations  different  from  those
    intended could result in a hazardous situation\b
    Service
    Have your power tool serviced by a qualified
    r e p a i r   p e r s o n   u s i n g   o n l y   i d e n t i c a l
    replacement  parts.  This  will  ensure  that  the
    safety of the power tool is maintained\b
    Wear  ear  protectors  with  impact  drilling.
    Exposure to noise can cause hearing loss\b
    Use  auxiliary  handle(s)  if  supplied  with  the
    tool. Loss of control can cause personal injury\b
    Hold  power  tool  by  insulated  gripping
    surfaces,  when  performing  an  operation
    where  the  cutting  accessory  may  contact
    h i d d e n   w i r i n g   o r   i t s   o w n   c o r d .   C u t t i n g
    accessory  contacting  a  live  wire  may  make
    exposed  metal  parts  of  the  power  tool  live
    and could give the operator an electric shock\b
    Use  clamps  or  another  practical  way  to
    secure  and  support  the  workpiece  to  a
    stable platform.   Holding the work by hand or
    against  your  body  leaves  it  unstable  and  may
    lead to loss of control\b
    \fo  not  drill,  fasten  or  break  into  existing
    walls or other blind areas where electrical
    w i r i n g   m a y   e x i s t . I f   t h i s   s i t u a t i o n   i s
    unavoidable,  disconnect  all  fuses  or  circuit
    breakers feeding this worksite\b
    A l w a y s   w e a r   s a f e t y   g o g g l e s   o r   e y e
    protection  when  using  this  tool.    Use  a
    dust  mask  or  respirator  for  applications
    which generate dust.
    Use  thick  cushioned  gloves  and  limit  the
    e x p o s u r e   t i m e   b y   t a k i n g   f r e q u e n t   r e s t
    periods.  Vibration  caused  by  hammerdrill
    action  may  be  harmful  to  your  hands  and
    arms\b  Secure  the  material  being  drilled.  Never
    h o l d   i t   i n   y o u r   h a n d   o r   a c r o s s   l e g s .
    Unstable  support  can  cause  the  drill  bit  to
    bind causing loss of control and injury\b
    Position  the  cord  clear  of  rotating  bit.    \fo
    not  wrap  the  cord  around  your  arm  or
    wrist.    If  you  lose  control  and  have  the  cord
    wrapped  around  your  arm  or  wrist  it  may
    entrap you and cause injury\b
    Position  yourself  to  avoid  being  caught
    between  the  tool  or  side  handle  and  walls
    or  posts.    Should  the  bit  become  bound  or
    jammed  in  the  work,  the  reaction  torque  of
    the tool could crush your hand or leg\b
    I f   t h e   b i t   b e c o m e s   b o u n d   i n   t h e
    w o r k p i e c e ,   r e l e a s e   t h e   t r i g g e r
    i m m e d i a t e l y ,   r e v e r s e   t h e   d i r e c t i o n   o f
    rotation  and  slowly  squeeze  the  trigger  to
    back  out  the  bit.    Be  ready  for  a  strong
    reaction  torque\b    The  drill  body  will  tend  to
    twist in the opposite direction as the drill bit is
    rotating\b
    \fo not grasp the tool or place your hands
    too  close  to  the  spinning  chuck  or  drill bit.  Your hand may be lacerated\b
    When installing a drill bit, insert the shank
    o f   t h e   b i t   w e l l   w i t h i n   t h e   j a w s   o f   t h e
    c h u c k .     I f   t h e   b i t   i s   n o t   i n s e r t e d   d e e p
    enough,  the  grip  of  the  jaws  over  the  bit  is reduced and the loss of control is increased\b
    Safety Rules for Hammer \frills
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    							4
    GFCI  and  personal  protection  devices  like
    electrician’s  rubber  gloves  and  footwear  will
    further enhance your personal safety\b
    \fo  not  use  AC  only  rated  tools  with  a  \fC
    power  supply.  While  the  tool  may  appear  to
    work,  the  electrical  components  of  the  AC
    rated  tool  are  likely  to  fail  and  create  a  hazard
    to the operator\b
    Keep  handles  dry,  clean  and  free  from  oil
    and  grease.  Slippery  hands  cannot  safely
    control the power tool\b
    Use clamps or other practical way to secure
    and  support  the  workpiece  to  a  stable
    platform.   Holding the work by hand or against
    your  body  is  unstable  and  may  lead  to  loss  of control\b
    \fevelop  a  periodic  maintenance  schedule
    for  your  tool.  When  cleaning  a  tool  be
    careful  not  to  disassemble  any  portion  of t h e   t o o l   s i n c e   i n t e r n a l   w i r e s   m a y   b emisplaced or pinched or safety guard return
    s p r i n g s   m a y   b e   i m p r o p e r l y   m o u n t e d . Certain  cleaning  agents  such  as  gasoline,c a r b o n   t e t r a c h l o r i d e ,   a m m o n i a ,   e t c \b   m a ydamage plastic parts\b Risk of injury to user\b The power cord must only
    be serviced by a Bosch Factory Service Center
    or Autho rized Bosch Service Station\b
    Some dust created by power
    sanding,  sawing,  grinding,
    drilling,  and  other  construction  activities
    contains chemicals known to cause cancer,
    birth  defects  or  other  reproductive  harm.
    Some examples of these chemicals are\b
    • Lead from leadbased paints,
    • Crystalline silica from bricks and cement and other masonry products, and
    • Arsenic  and  chromium  from  chemically treated lumber\b
    Y o u r   r i s k   f r o m   t h e s e   e x p o s u r e s   v a r i e s ,
    depending  on  how  often  you  do  this  type  of
    w o r k \b   T o   r e d u c e   y o u r   e x p o s u r e   t o   t h e s e
    chemicals:  work  in  a  well  ventilated  area,  and
    work with approved safety equipment, such as
    those  dust  masks  that  are  specially  designed
    to filter out microscopic particles\b
    Additional Safety Warnings
    !WARNING
    \f o   n o t   u s e   d u l l   o r   d a m a g e d   b i t s   a n d
    accessories.    Dull  or  damaged  bits  have  a
    greater tendency to bind in the workpiece\b
    When removing the bit from the tool avoid
    c o n t a c t   w i t h   s k i n   a n d   u s e   p r o p e r
    protective gloves when grasping the bit or
    accessory.    Accessories  may  be  hot  after
    prolonged use\b C h e c k   t o   s e e   t h a t   k e y s   a n d   a d j u s t i n g
    w r e n c h e s   a r e   r e m o v e d   f r o m   t h e   d r i l l
    before  switching  the  tool  "ON".    Keys  or
    w r e n c h e s   c a n   f l y   a w a y   a t   h i g h   v e l o c i t y
    striking you or a bystander\b
    \fo  not  run  the  drill  while  carrying  it  at
    your  side.    A  spinning  drill  bit  could  become
    entangled with clothing and injury may result\b
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    							5
    IMPORTANT\bSome  of  the  following  symbols  may  be  used  on  your  tool\b    Please  study  them
    and  learn  their  meaning\b    Proper  interpretation  of  these  symbols  will  allow  you  to  operate  the
    tool better and safer\b
    Symbol Name \fesignation/Explanation
    V VoltsVoltage (potential)
    A AmperesCurrent
    Hz Hertz Frequency (cycles per second)
    W WattPower
    kg Kilograms Weight
    min Minutes Time
    s SecondsTime
    DiameterSize of drill bits, grinding wheels,  etc\b 
    n0No load speedRotational speed, at no load
    n Rated speed Maximum attainable speed 
    \b\b\b/min Revolutions or reciprocation  Revolutions, strokes, surface speed, 
    per minuteorbits etc\b per minute
    0 Off position Zero speed, zero torque\b\b\b
    1, \f, 3, \b\b\b Selector settings Speed, torque or position settings\b
    I, II, III,Higher number means greater speed
    Infinitely variable selector with off Speed is increasing from 0 setting
    ArrowAction in the direction of arrow
    Alternating currentType or a characteristic of current
    Direct currentType or a characteristic of current
    Alternating or direct currentType or a characteristic of current
    Class II construction Designates Double Insulated 
    Construction tools\b
    Earthing terminalGrounding terminal
    Warning symbol Alerts user to warning messages
    Liion RBRC sealDesignates Liion battery recycling
    program
    NiCad RBRC seal Designates NiCad battery recycling
    program
    Read manual symbol Alerts user to read manual
    Wear eye protection symbolAlerts user to wear eye protection
    Symbols
    0
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    							6
    This symbol designates that this tool is listed by Underwriters Laboratories\bThis symbol designates that this tool is listed by the Canadian Standards
    Association\b
    This symbol designates that this tool is listed by the Canadian Standards
    Association, to United States and Canadian Standards\b
    This symbol designates that this tool complies to NOM Mexican Standards\b
    This symbol designates that this tool is listed by the Intertek Testing
    Services, to United States and Canadian Standards\b
    Symbols (continued)
    IMPORTANT\b Some  of  the  following  symbols  may  be  used  on  your  tool\b    Please  study  them
    and  learn  their  meaning\b    Proper  interpretation  of  these  symbols  will  allow  you  to  operate  the
    tool better and safer\b
    This symbol designates that this tool is recognized by Underwriters Laboratories\b
    This symbol designates that this tool is listed by Underwriters Laboratories,
    to United States and Canadian Standards\b
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    							7
    Functional Description and Specifications
    D i s c o n n e c t   t h e   p l u g   f r o m   t h e   p o w e r   s o u r c e   b e f o r e   m a k i n g   a n y
    assembly,  adjustments  or  changing  accessories\b  Such  preventive  safety
    measures reduce the risk of starting the tool ac\3cidentally\b!WARNING
    NOTE\b For tool specifications refer to the nameplate on your tool\b
    REVERSING
    SWITCH LEVER
    VENTILATION
    OPENINGS
    GEAR SELECTION DIAL
    CHUCK VARIABLE SPEED
    CONTROLLED TRIGGER SWITCH
    AUXILIARYHANDLE
    FIG. 1
    CHUCK KEY &
    STORAGE AREA
    Model number HD19\f
    No load speed 1 n
    0 01,150/min
    No load speed \f n
    0 03,000/min
    Impact rate 1 019,550 BPM
    Impact rate \f 051,000 BPMMaximum capacities
    Chuck capacity 1/\f
    Material 1 low \f high
    Concrete 3/4 3/8
    Aluminum 5/8 3/8
    Steel 1/\f 1/4
    Wood 11/\f NA
    DRILLôbHAMMER DRILL
    SELECTION SWITCH
    Hammer \frill
    DEPTH
    GAUGE
    HAND GRIP
    RUBBERIZED GRIP
    CORD
    PROTECTOR
    COLLAR MOUNT
    LOCKING TEETH
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    							8
    Assembly
    \fisconnect  the  plug  from
    the  power  source  before
    m a k i n g   a n y   a s s e m b l y ,   a d j u s t m e n t s   o r
    changing  accessories. Such  preventive
    safety measures reduce the risk of starting the
    tool accidentally\b
    INS\fRTING BIT
    For  small  bits,  open  jaws  enough  to  insert  the
    bit  up  to  the  flutes\b  For  large  bits,  insert  the  bit
    as  far  as  it  will  go\b  Center  the  bit  as  you  close
    t h e   j a w s   b y   h a n d \b   T h i s   p o s i t i o n s   t h e   b i t
    properly,  giving  maximum  contact  between  the
    chuck jaws and the bit shank\b
    To  tighten  chuck,  insert  key  into  each  of  the
    three  key  holes  in  succession  and  tighten clockwise firmly\b The chuck can be released by
    using one hole only (Fig\b \f)\b!WARNING
    FIG. 2Counter
    ClockwiseClockwise
    AUxILIARy HAN\fLE
    The  tool  must  be  supported  with  the  auxiliary
    handle, which can be swiveled and locked into
    1\f positions 360˚ around the collar mount\b
    To  reposition  and/or  swivel  the  handle,  rotate
    lower  portion  of  hand  grip  counterclockwise,
    push  handle  forward  until  it  disengages  from
    locking  teeth  in  the  collar  mount,  move  handle
    to the desired position and push handle inward
    until  it  engages  into  desired  position,  then
    securely tighten hand grip clockwise (Fig\b 3)\b
    \fEPTH GAUGE
    Your  drilling  depth  can  be  preset  and/or
    repeated by using the depth gauge\b
    Setting  depth:  After  the  auxiliary  handle  is
    installed,  make  sure  the  accessory  has  been
    fully  inserted  into  the  chuck  before  setting  the
    depth gauge (Fig\b 3)\b 
    To  adjust  depth,  rotate  lower  portion  of  hand
    grip  counterclockwise  to  loosen  depth  gauge, slide  depth  gauge  to  desired  position  and
    securely tighten hand grip clockwise (Fig\b 3)\b
    HAND GRIP
    FIG. ôf
    Counter
    ClockwiseClockwise
    Operating Instructions
    VARIAbLE SPEE\f CONTROLLE\f TRIGGER SWITCH
    Your tool is equipped with a variable speed trigger
    switch\b  The tool can be turned ON or OFF by
    squeezing  or  releasing  the  trigger\b    The  speed can  be  adjusted  from  the  minimum  to  maximum
    nameplate RPM by the pressure you apply to the
    trigger\b    Apply  more  pressure  to  increase  the speed  and  release  pressure  to  decrease  speed
    (Fig\b 1)\b
    LOCKING
    TEETH
    COLLAR MOUNT
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    							9
    REVERSING SWITCH LEVER
    This  tool  is  equipped  with  a  rotating  brush
    reversing system\b This results in longer tool life
    while maximizing power in both forward and re 
    verse  directions\b  The  reverse  switch  can  be
    oper ated from either the right or left side of the
    tool\b FOR  FORWARD  ROTATION:  slide  switch  to
    arrow marked forward (Fig\b 4)\b
    FOR  REVERSE  RO TATION:  slide  the  slide
    switch  to  arrow  marked  re verse\b  NOTE:  Tool
    will not operate in middle position (Fig\b 5)\b
    REVERSING
    SWITCHLEVER
    FIG. 4FIG. 5
    REVERSING SWITCHLEVER
    \fRILL/HAMMER \fRILL SELECTION SWITCH
    The selector switch allows the tool to be set for
    various  drilling/hammer  drilling  applications\b
    M o v e   t h e   s e l e c t o r   s w i t c h   r i g h t   o r   l e f t
    depending on the below applications (Fig\b 1)\b
    \f o   n o t   o p e r a t e   t h e
    selection  switch  until  the
    tool come to a complete stop. Shifting during
    rotation of the chuck can cause damage to the
    tool\b Drill  only  action:    For  drilling  in
    woods,  metals,  plastics  or  other
    non concrete materials\b
    D r i l l   w i t h   h a m m e r   a c t i o n :     F o r
    drilling  in 
    masonry,  asphalt,  tile  or
    other similar hard materials\b!CAUTION
    GEAR SELECTION \fIAL
    Gear  selection:    The  proper  gear  selection  is
    d i r e c t l y   r e l a t e d   t o   t h e   s p e e d   a n d   t o r q u e
    required for various jobs\b  The following should
    be adhered to when selecting the proper gear:
    Speed  1  =    low  speed  with  high
    torque Speed  \f  =    high  speed  with  low
    torque
    Changing  gears:  Change  gear  position  only
    with  the  motor  at  a  complete  standstill\b    To
    change  gears  rotate  the  gear  selection  dial\b    If
    you have difficulties changing from one gear to
    the  other,  turn  the  chuck  by  hand  until  the
    gears engage (Fig\b 1)\b
    CHUCK K\fY & STOR\bG\f \bR\f\b
    Your  tool  is  equipped  with  a  chuck  key  that  is conveniently  located  on  the  cord  protector where it is always handy and unlikely to get lost
    or misplaced\b
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    							You  will  extend  the  life  of  your  bits  and  do
    n e a t e r   w o r k   i f   y o u   a l w a y s   p u t   t h e   b i t   i n
    c o n t a c t   w i t h   t h e   w o r k   b e f o r e   p u l l i n g   t h e
    trigger\b  During  the  oper a tion,  hold  the  tool
    firmly  and  exert  light,  steady  pressure\b  Too
    much pressure at low speed will stall the tool\b
    T o o   l i t t l e   p r e s s u r e   w i l l   k e e p   t h e   b i t   f r o m
    cutting  and  cause  excess  friction  by  sliding
    over  the  surface\b  This  can  be  damaging  to
    both tool and bit\b
    \fRILLING WITH VARIAb\ELE SPEE\f
    The  trigger  controlled  variable  speed  feature
    will  eliminate  the  need  for  center  punches  in
    hard  materials\b  The  variable  speed  trigger
    allows  you  to  slowly  increase  RPM\b  By  using
    a  slow  starting  speed,  you  are  able  to  keep
    the  bit  from  “wander ing”\b  You  can  increase
    the  speed  as  the  bit  “bites”  into  the  work  by
    squeezing the trigger\b
    \fRILL bITS
    Always inspect drill bits for excessive wear\b Use
    only bits that are sharp and in good condition\b
    T W I S T   B I T S :   A v a i l a b l e   w i t h   s t r a i g h t   a n d
    reduced  shanks  for  wood  and  light  duty  metal
    drilling\b  High  speed  bits  cut  faster  and  last
    longer on hard ma terials\b
    CARBIDE  TIPPED  BITS:  Used  for  drilling
    stone,  con crete,  plaster,  cement  and  other
    unusually  hard  nonmetals\b  Use  continuous
    heavy  feed  pres sure  when  employing  carbide
    tip bits\b
    \fRILLING WOO\f
    Be  certain  workpiece  is  clamped  or  anchored
    firm ly\b  Always  apply  pressure  in  a  straight  line with  the  drill  bit\b  Maintain  enough  pressure  to
    keep the drill “biting”\b
    When  drilling  holes  in  wood,  twist  bits  can  be
    used\b Twist bits may overheat unless pulled out
    frequently to clear chips from flutes\b
    Use  a  “backup”  block  of  wood  for  work  that  is
    likely to splinter, such as thin materials\b
    You  will  drill  a  cleaner  hole  if  you  ease  up  on
    the  pressure  just  before  the  bit  breaks  through
    the  wood\b  Then  complete  the  hole  from  the
    back side\b
    \fRILLING METAL
    There  are  two  rules  for  drilling  hard  materials\b
    First,  the  harder  the  material,  the  greater  the
    pres sure you need to apply to the tool\b Second,
    the  harder  the  material,  the  slower  the  speed\b
    Here  are  a  couple  of  tips  for  drilling  in  metal\b
    Lubri cate  the  tip  of  the  bit  occasionally  with
    cutting oil except when drilling soft metals such
    as alu minum, cop per or cast iron\b If the hole to
    be drilled is fairly large, drill a smaller hole first,
    then  enlarge  to  the  required  size,  it’s  often
    f a s t e r   i n   t h e   l o n g   r u n \b   M a i n  t a i n   e n o u g h
    pressure  to  assure  that  the  bit  does  not  just
    spin in the hole\b This will dull the bit and greatly
    shorten its life\b
    \fRILLING MASONRy
    Use carbidetipped masonry bit for cinder block,
    mortar,  common  brick,  soft  stone  and  other
    materials\b  The  amount  of  pressure  to  be  used
    is  dependent  upon  the  type  of  material  being
    drilled\b  Soft  materials  require  less  pressure
    while the hard materials need more pressure to
    prevent the drill bit from spinning\b
    10
    Operating Tips
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