Bosch 2608594562 Multi Material Threaded Hole Saw, 20 x 40 mm

Bosch 2608594562 Multi Material Threaded Hole Saw, 20 x 40 mm

The Bosch 2608594562 is a 20 mm multi material threaded hole saw with a 40 mm working length, built with bi-metal Vario teeth for cutting clean 20 mm holes in steel, drywall, softwood and plastics. It fits rotary drill/drivers and impact drill/drivers via its threaded connection, and is supplied as a single piece (EAN 6949509252753).

One saw, four material groups. Instead of switching between a metal hole saw, a wood bit and a drywall cutter, you fit one accessory and keep working through mixed substrates — a stud wall with a steel track behind it, a plastic conduit box, a softwood batten. The Vario tooth pattern varies the pitch along the crown, which reduces snagging and vibration when the material changes mid-cut and helps the saw stay stable at breakthrough instead of grabbing.

Why 20 mm?

A 20 mm bore is the everyday size for cable runs, 20 mm conduit, small pipework, cable glands, wall plugs and control-panel entries. If you regularly drill service holes on site or in the workshop, this is the diameter you reach for most.

Key features

• Bi-metal construction — a high-speed steel cutting edge welded to a tougher backing body, so the teeth hold an edge in steel while the body resists cracking under impact. This is the reason a bi-metal hole saw outlasts a plain carbon-steel one in mixed materials.
• Vario tooth geometry — variable tooth pitch for smoother, lower-vibration cutting across different material densities.
• Threaded mount — screws directly onto a compatible threaded hole saw arbor for quick changeovers.
• Multi material rated — specified by Bosch for steel, drywall, softwood and plastics.
• Machine compatibility — works with rotary drill/drivers and impact drill/drivers, corded or cordless.

Typical applications

• Drilling 20 mm cable and conduit holes through drywall and plasterboard partitions
• Cutting service holes in steel sheet, studwork track and light metal enclosures
• Boring through softwood joists, battens and studs
• Making clean openings in plastic trunking, ducting and back boxes
• Electrical first fix, plumbing, HVAC installation, kitchen and bathroom fit-out, general maintenance

How to get the best results

Run at a low to moderate speed — hole saws cut by shearing, not by heat, and over-speeding is the fastest way to blue the teeth. Use light, steady pressure and let the pilot drill establish the centre before the crown engages. In metal, add cutting fluid and clear the swarf; in drywall and wood, back the pressure off at breakthrough so the saw doesn't snatch. Eject the slug through the side slot as soon as the cut is complete.

What's in the box

1 x Bosch Multi Material Threaded Hole Saw, 20 x 40 mm. (Supplied as the hole saw only — a threaded arbor and pilot drill are not listed as included.)

3. Specifications

4. FAQ

What size hole does the Bosch 2608594562 cut? The Bosch 2608594562 cuts a 20 mm diameter hole. Its working length is 40 mm.

What materials can the Bosch 2608594562 cut? It is rated for steel, drywall, softwood and plastics. The bi-metal teeth handle metal, while the Vario pitch keeps the cut smooth in softer boards and timber.

What drill do I need for the Bosch 2608594562? It is designed for rotary drill/drivers and impact drill/drivers. Use a low to moderate speed setting; hammer action should be switched off.

Does the Bosch 2608594562 include an arbor? No. The pack contains one hole saw. It has a threaded mount, so you fit it to a compatible threaded hole saw arbor with a pilot drill.

What is a Vario tooth design? Vario means the tooth pitch varies around the crown rather than staying constant. Varying the pitch breaks up the harmonic vibration that causes chatter, so the saw runs smoother and is less likely to snag when it passes from one material into another.

What is the difference between a bi-metal and a standard hole saw? A bi-metal hole saw welds a high-speed steel cutting edge to a flexible alloy body. The HSS edge stays sharp in steel; the softer body flexes instead of shattering. A single-material carbon steel hole saw is cheaper but dulls quickly in metal.

Can I use the Bosch 2608594562 on tiles, masonry or brick? No. It is specified for steel, drywall, softwood and plastics. Masonry, tile and concrete need a carbide or diamond-tipped hole saw instead.