Question 1

What is the Milwaukee 48-20-3954 SDS Max MX4 Drill Bit designed for?

Accepted Answer

The Milwaukee 48-20-3954 is designed for demanding drilling in concrete, including reinforced concrete with rebar, hard aggregate, and masonry applications. Its SDS Max shank makes it compatible with SDS Max rotary hammers, while the 1-inch diameter and 17-inch cutting depth support deep concrete drilling work.

Question 2

How does the 4-cutter design perform when drilling through rebar?

Accepted Answer

The 4-cutter geometry is designed to help prevent the bit from locking up when it encounters rebar. Combined with integrated rebar guards, the design provides increased durability in reinforced concrete and hard aggregate applications while helping reduce interruptions caused by rebar contact.

Question 3

What is the purpose of the solid head carbide construction?

Accepted Answer

The solid head carbide construction is engineered for demanding drilling conditions in concrete with rebar. Milwaukee states that the design can deliver up to 5 times longer life in concrete with rebar compared with its specified reference, making it suited to repeated professional drilling applications.

Question 4

Can this bit be used for accurate spot drilling?

Accepted Answer

Yes. The Milwaukee 48-20-3954 features a sharp centering tip designed for exact spot drilling in concrete and metal decking. This helps users establish the intended drilling location more accurately before progressing into the material.

Question 5

How does the wear mark indicator help with bit maintenance?

Accepted Answer

The wear mark indicator provides a visual reference for monitoring the condition of the drill bit. It helps identify when the bit has reached the point where it no longer meets ANSI diameter requirements, allowing users to recognize when replacement is necessary for applications requiring compliant hole dimensions.

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