A studio photograph of three silver Bosch 4-inch standard turbo rim diamond blades stacked vertically, showing the segmented diamond rim, cooling holes, and the Bosch logo on the center of the steel core.
A studio photograph of the Bosch DB442SB3 3-piece value pack in its original blue and white retail packaging, featuring three 4-inch turbo rim diamond blades and graphic icons for masonry, concrete, and stone applications.
A studio photograph of three silver Bosch 4-inch standard turbo rim diamond blades stacked vertically, showing the segmented diamond rim, cooling holes, and the Bosch logo on the center of the steel core.
A studio photograph of the Bosch DB442SB3 3-piece value pack in its original blue and white retail packaging, featuring three 4-inch turbo rim diamond blades and graphic icons for masonry, concrete, and stone applications.
BOSCH

Bosch Diamond Blade Set DB442SB3 4 In 7/8 Arbor (Turbo Continuous Rim Alloy Steel Core 3 Pack 5/8 Bushing Concrete Masonry Stone Cutter)

In stock
SKU: DB442SB3
$19.79 USD

Description

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Industrial-Grade 4 Inch Turbo Continuous Rim Diamond Saw Blade 3-Pack

The Bosch DB442SB3 4-Inch Standard Turbo Rim Diamond Blade Set functions as a high-density masonry cutting disc system engineered to yield smooth, chip-free cuts through concrete, brick, stone slabs, and cinder block. Formulated with industrial-grade diamond particles embedded in an optimized metallic bond matrix, each blade features a 7/8-inch round arbor with an included 5/8-inch steel bushing for small angle grinders. Featuring a continuous turbo rim design for continuous contact and a reinforced alloy steel core equipped with thermal cooling holes, this 3-pack maintains a 1.0-inch maximum cutting depth during dry or wet grinding operations without thermal plate distortion.

Best Used For:

  • Decorative Stone & Tile Trimming: Executing clean, chip-free edge cuts on granite, marble, paver stones, and natural stone slabs.
  • Concrete & Masonry Joint Scoring: Cutting straight expansion joint channels in concrete slabs, mortar beds, and brickwork prior to repointing.
  • Cinder Block & Brick Modification: Slicing structural clay bricks, concrete masonry units (CMU), and wall blocks during interior or exterior masonry repair.

Key Performance & Safety Features

  • Continuous Turbo Rim Profile: Segmented tooth geometry maintains constant edge contact to eliminate material chipping and ensure smooth finishes.
  • Industrial Synthetic Diamond Matrix: Formulated with larger diamond grit uniformly spaced within a metal bond for fast material removal and extended wear.
  • Heat-Dissipating Core Cooling Holes: Alloy steel body integrates engineered ventilation ports to vent thermal friction and prevent core warping.
  • Universal Dual-Arbor Configuration: Features a standard 7/8-inch arbor with included 5/8-inch reduction bushings to fit corded and cordless 4-inch angle grinders.
  • Reinforced Alloy Steel Plate: Rigidity-enhanced center core stabilizes rotational tracking to reduce lateral blade chatter under heavy feed pressure.

What's Included

  • (3) Bosch DB442SB3 4-Inch Standard Turbo Rim Diamond Saw Blades
  • (3) 7/8-Inch to 5/8-Inch Arbor Adapter Bushings

Technical Specifications

Brand Name Bosch Tools
Model Number SKU DB442SB3
Tool Classification Turbo Continuous Rim Diamond Blade
Blade Outer Diameter 4.00 in.
Arbor Hole Specification 0.875 in. (7/8 in.) with 0.625 in. (5/8 in.) Bushing
Maximum Cutting Depth 1.00 in.
Rim Style Profile Turbo Continuous Rim
Cutting Method Application Dry / Wet Cutting Universal
Core Body Metallurgy Heat-Treated Reinforced Alloy Steel Core
Cutting Edge Composition Industrial Synthetic Diamond Grit Matrix
Master Pack Quantity 3 Blades
Total Item Weight 0.64 lbs. (292 g)
Primary Machine Compatibility 4-Inch Corded and Cordless Angle Grinders
Target Material Substrates Concrete, Red Clay Brick, Stone Slabs, Masonry Block, Mortar

Pro-Tip: When dry cutting dense materials like granite or poured concrete slabs with these turbo rim blades, avoid forcing the angle grinder into the cut. Every 15 to 20 seconds, pull the blade slightly out of the kerf while keeping the grinder running at full speed to allow airflow through the cooling holes to discharge heat and prevent premature diamond matrix glazing.