Milwaukee MX4 Rotary Hammer Bits Accessory Reviews

Milwaukee MX4 Rotary Hammer Drill Bits


Milwaukee MX4 Bits Even Tackle Rebar

Milwaukee released its MX4 Rotary Hammer Bits that come in both SDS-Plus and SDS-Max formats. These bits feature a 4-cutter solid carbide head to drill through the toughest, rebar-reinforced concrete.

10-Second Summary

  • Milwaukee MX4 Rotary Hammer Bits have a 4-cutter solid carbide head
  • Delivers up to 5x longer life in concrete with rebar
  • Designed with rebar guards and sharp centering tips
  • Design prevents lock-up in rebar
  • Variable flumes remove dust faster while reducing heat
  • Wear mark indicator shows you when bit no longer meets ANSI requirements
  • Available in diameters from 5/32″ up to 1-1/4″ in SDS-Plus, and 3/8″ to 2″ for SDS-Max
  • Price: $13.99 – $48.99

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Concrete Meets Its Match…Again

Milwaukee MX4 Rotary Hammer Bits

Milwaukee tells us that the MX4 bits have the goods to last 5x longer in concrete with rebar. Milwaukee tweaked the design to feature a solid carbide 4-cutter head with a rebar guard. The bits also have sharp centering tips that give you exact spot drilling in both concrete and metal decking.

This head design helps prevent lock-up in rebar, reducing downtime.

Further, the MX4 bits feature variable flutes that remove dust faster while reducing heat. We’ve seen this feature work very effectively in some of the best drill bits we’ve used. Milwaukee claims it also helps extend your rotary hammer’s battery charge by up to 20%.

The Milwaukee MX4 bits meet ANSI requirements and feature a wear mark indicator to show when that is no longer the case.

Milwaukee MX4 Rotary Hammer Bits
Here’s Johnny!

The Milwaukee MX4 4-Cutter rotary hammer drill bits come in both SDS-Plus and SDS-Max “flavors”. The SDS-Plus models range in diameters from 5/32″ to 1-1/4″. The SDS-Max models range between 3/8″ to 2″. You can pick up these bits for anywhere between $13.99 to $48.99.

Milwaukee MX4 Rotary Hammer Drill Bits

  • 48-20-7351 – SDS-Plus 4CT MX4 3/8 x 4 x 6 in.: $13.99
  • 48-20-7200 – SDS-Plus 4CT MX4 5/8 x 6 x 8 in.: $25.99
  • 48-20-3932 – SDS-Max 4CT MX4 3/4 x 18 x 21 in.: $48.99
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