Bosch Expert for Multi Material 305 × 30, 96T

Every figure below is a manufacturer specification read off the listing itself. The judgments are ours.

What the specification says

Ø 305 × 30 × 2.4 mm (12 × 1.18 × 0.09 in), 96 teeth, part number 2608642529. Bosch names non-ferrous metals, aluminum, plastics and wood, and points at window fabrication as the intended setting.

Bore before diameter

The diameter decides whether the blade clears the guard; the bore decides whether it goes onto the shaft at all. Thirty millimeters is the European standard, and reducer rings step a large bore down onto a smaller shaft — never the other way round. A ring that is a loose fit lets the blade run slightly off center, which shows up as vibration and a cut that wanders rather than as an obvious fault.

Read both figures off the machine rather than off the blade you are replacing, which may itself have been the wrong one.

Ninety-six teeth is a profile blade

A very high tooth count on a large blade means a very small bite per tooth. That is what a thin-walled aluminum extrusion needs: take too much and the tooth catches the wall and tears it. On solid timber the same blade would have nowhere to put the waste and would burn, which is why this is a specialist purchase rather than an upgrade.