Milwaukee SHOCKWAVE Impact Bit PH3, 25 mm, 4932500354

Milwaukee SHOCKWAVE Impact Bit PH3, 25 mm, 4932500354

Milwaukee 4932500354 is an impact bit from the SHOCKWAVE Impact Duty range in PH3, 25 mm long. The fitting is a 1/4" hex and the pack contains 3 pieces per pack.

The PH3 recess

PH3 is the large cross-head size. It appears on bigger timber and sheet-metal screws, where PH2 already slips in the recess. If a PH2 bit cams out and chews the head, the usual reason is that the screw wants PH3.

What SHOCK ZONE is

An impact driver does not deliver torque smoothly - it delivers it in blows, hundreds of times a minute. Each blow is an abrupt spike in load, and that is what breaks ordinary bits: the energy reaches the tip and snaps it off.

SHOCK ZONE is a section of the shank with a reduced diameter, designed to twist elastically. It absorbs the blow and returns it like a spring, instead of passing it to the tip. Together with a special heat treatment it gives the bit a property that sounds contradictory for hardened steel: it flexes rather than breaks.

The 25 mm length

25 mm is the short "insert" standard. The bit goes into a magnetic holder or straight into the impact driver's chuck. The advantage of the short length is stability: the shorter the bit, the less runout at the tip and the more accurately it seats in the recess.

Making them last

Most bits do not wear out - they break from bad technique. Three rules cover almost everything: hold the machine square to the screw axis - angled load concentrates in one corner of the tip; release the trigger the moment the head seats - every further blow only fatigues the bit; and never work a chewed-out recess - there the bit spins in the void, heats up and wears out in minutes.

Technical specifications

Questions and Answers