Bosch EXPERT for Aluminium Circular Saw Blade 165 x 30 mm, 52T, 2608644096

Bosch EXPERT for Aluminium Circular Saw Blade 165 x 30 mm, 52 Teeth, 2608644096

Bosch EXPERT for Aluminium (article number 2 608 644 096) is a carbide-tipped circular saw blade for cutting aluminium and non-ferrous metals, measuring 165 mm in diameter with a 30 mm bore and 52 teeth. The kerf is 2.6 mm over a 1.6 mm plate, and maximum speed reaches 11,500 rpm.

Why aluminium needs its own blade

Aluminium is soft but sticky - as it is cut, the chip welds itself to the cutting edge instead of clearing. A wood blade taken to an aluminium section clogs within minutes, starts to vibrate and, in the worst case, grabs the workpiece and throws it. An aluminium blade answers that with three separate measures: tooth geometry, a negative hook angle and a coating.

Negative -5° hook angle

The hook angle on this blade is -5°, meaning the tooth leans back against the direction of rotation. With a positive hook the tooth digs in and self-feeds - desirable in timber, but in soft metal it leads to grabbing and pulling the workpiece off its support. A negative hook forces the blade to scrape in a controlled way rather than pull. The relief angle is 15°.

HLTCG geometry

The tooth form is HLTCG - a trapezoidal tooth followed by a flat one. The trapezoidal tooth goes first and cuts the groove, and the flat tooth behind it squares it out to full width. Splitting the work between two teeth reduces the load on each, and it is why the cut in aluminium comes out almost burr-free - the same geometry, for the same reason, is used on laminate and composite panels.

Coating and anti-vibration slots

The plate carries a protective coating serving two purposes: it prevents corrosion and reduces friction against the walls of the kerf, which directly reduces aluminium build-up. The body is also cut with anti-vibration slots - at 11,500 rpm in soft material, vibration is the main source of both a rough edge and noise.

Microteq carbide

The tips are fine-grain Microteq carbide, produced in-house by Bosch. Fine grain allows a sharper cutting edge that holds for longer; with non-ferrous metals that matters directly, because a blunt tooth stops cutting and begins mashing and welding the chip instead.

Working with the blade

The section must be firmly clamped - an unsupported workpiece is dangerous when cutting aluminium. Use a cutting lubricant for aluminium (wax or a dedicated paste): it reduces chip adhesion more than any other single measure. Feed steadily and do not force. Wear eye protection - aluminium swarf is sharp, light and travels far. Confirm your machine's speed does not exceed 11,500 rpm and that the 30 mm bore matches its arbor.

Technical specifications

Questions and Answers