Bosch Optiline Wood Circular Saw Blade 216 x 30 mm, 48T, 2608640641

Bosch Optiline Wood Circular Saw Blade 216 x 30 mm, 48 Teeth, 2608640641

Bosch Optiline Wood (article number 2 608 640 641) is a carbide-tipped circular saw blade for wood, 216 mm in diameter with a 30 mm bore and 48 teeth. The kerf is 2.8 mm and maximum speed is 7,000 rpm. The blade is intended for mitre saws and table saws.

216 mm - the compact mitre saw size

216 mm with a 30 mm bore is the standard on compact mitre saws. The blade gives enough width of cut for skirting, mouldings and joinery, and the lower maximum speed reflects the larger diameter: at the same rpm, a bigger blade has a considerably higher rim speed.

48 teeth - for a clean cut

At 216 mm, 48 teeth falls in the range for a clean crosscut. Blades with fewer teeth cut faster but leave a coarser edge and suit rough breakdown work; blades with more give an even smoother cut but heat up in thicker material. Forty-eight is the balance at which one blade does both jobs decently.

Geometry and carbide

The teeth use an alternate top bevel (ATB): each successive tooth is ground the opposite way and severs the fibres from the side rather than pushing them forward. That is what protects the underside of the workpiece from splintering. Speed is limited to 7,000 rpm - lower because of the larger diameter, at which rim speed rises quickly. The tips are tungsten carbide, which holds a keen edge many times longer than hardened steel and tolerates higher temperatures without softening.

Materials

The blade cuts softwood and hardwood as well as boards - chipboard, plywood, MDF and laminated panels. On laminate, backing under the workpiece matters especially, because the surface chips far more readily than solid timber.

Mounting and speed

Confirm your machine's arbor is 30 mm - any other size needs a reducing ring, not a blade forced onto the spindle. Machine speed must not exceed 7,000 rpm. Match the direction of rotation to the arrow on the blade as well - fitted backwards, a blade does not cut but crushes and overheats.

Getting a clean cut

Use backing under the workpiece: a sacrificial board or a zero-clearance insert. With nothing supporting the fibres below, they tear free no matter how sharp the blade. Feed steadily - too slow and the teeth heat up and burn the cut, too fast and the tips are overloaded. Remove resin with a dedicated cleaner or degreaser, never with an abrasive, which damages the coating and dulls the cutting edge.

Technical specifications

Questions and Answers