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Milwaukee® 48-20-3970 4-Cutter Rotary Hammer Drill Bit, 1-1/4 in Drill Bit, 45/64 in SDS Max® Shank, 10 in D Cutting, Carbide Cutting Edge, 15 in OAL

48-20-3970 MFG #: 48-20-3970
$128.62 / EA
  • Applicable Materials: Block, Brick, Concrete and Reinforced Concrete
  • Color: Silver
  • Country of Origin: DE
  • Cutting Depth: 10 in
  • Cutting Direction: Right Hand
  • Cutting Edge Material: Carbide
  • Drill Bit Size: 1-1/4 in
  • Finish: Uncoated
  • Flute Length: 10 in
  • Manufacturer Name: Milwaukee Tool
  • Material: High Carbon Steel
  • Overall Length: 15 in
  • Point Type: Centering
  • Shank Size: 45/64 in
  • Shank Type: SDS Max®
  • Type: 4-Cutter
Milwaukee® SDS-Max drill bits provide faster drilling speeds, increased life, and more cordless efficiency. Breaker point pulverize the material leading to up to 20% faster drilling speeds. Rebar guards protect the bit when hitting hard aggregate and rebar leading to longer life. Variable flutes remove the dust out of the hole more efficiently resulting in up to 15% more holes per battery charge. Wide flute entrances lead to faster drilling speeds, while reinforced flutes prevent bit breakage, rendering increased durability in tough concrete applications. The centering tip allows for exact spot drilling. All SDS-Max drill bits meet the ANSI specification for drilling holes for anchor applications and include wear mark indicator when signifying when the bit no longer meets the ANSI spec.
  • Application
  • Item Features
  • Standards
For fast bit changes and efficient power transfer from the hammer to the bit, use only in SDS MAX® drive hammers
  • Breaker points for up to 20% faster drilling speeds
  • Rebar guards for increased DuraGuard in hard aggregate and rebar
  • Variable flutes for up to 15% more holes per battery charge
  • Reinforced flutes to avoid bit breakage
  • Wide flute entrance for increased faster dust removal
  • Wear mark indicators to indicate end of life
  • Centering tip of exact spot drilling
  • Highest quality carbide maximizes material pulverization
  • The optimized flutes provide fastest debris extraction speeding up drill rates
  • Feature a 4-cutter 4 x 90 deg tip geometry to avoid lock up in rebar and patented rebar chamfers for increased durability
ANSI Specified|ARRA Compliant|Buy American Act Compliant|CSA Approved