A profile studio view layout displaying the smooth side configuration of the single Bosch SDS-max demolition bit resting horizontally against a solid white background, showcasing its monolithic forged steel construction from the slotted shank connection base to its straight flat chisel head.
A technical product diagram of the Bosch R-Tec flat chisel bit with directional callout lines and an official SDS-max logo, highlighting engineering details such as the Viper teeth that create additional fractures, self-sharpening grooves to extend bit life, and an innovative reflection element that increases material removal by up to 15 percent.
A material compatibility infographic graphic featuring a dark blue header banner that reads Best for, with individual illustrated quadrants showcasing Masonry stone, clay Brick, concrete Block, and aggregate Concrete.
A utility contractor wearing a yellow hard hat, safety glasses, high-visibility vest, and a protective respirator mask uses an SDS-max rotary hammer drill equipped with a bull point chisel bit to punch a clean fault line into a vertical concrete structural wall, supported by an adjacent blue HEPA-ready dust extractor vacuum system.
A heavy-duty blue Bosch SDS-max demolition hammer drill equipped with a dust collection shroud and a bull point bit rests balanced on a gray industrial structure layout, positioned directly above an inline blue HEPA-ready dust extractor vacuum unit within an active commercial jobsite interior.
A profile studio view layout displaying the smooth side configuration of the single Bosch SDS-max demolition bit resting horizontally against a solid white background, showcasing its monolithic forged steel construction from the slotted shank connection base to its straight flat chisel head.
A straight, horizontal studio product shot of the Bosch SDS-max R-Tec flat chisel bit against a crisp white background, highlighting its long solid metal body shaft, integrated reflection collar ring, slotted mounting shank, and precision-ground flat cutting face with longitudinal grooves.
A technical product diagram of the Bosch R-Tec flat chisel bit with directional callout lines and an official SDS-max logo, highlighting engineering details such as the Viper teeth that create additional fractures, self-sharpening grooves to extend bit life, and an innovative reflection element that increases material removal by up to 15 percent.
A material compatibility infographic graphic featuring a dark blue header banner that reads Best for, with individual illustrated quadrants showcasing Masonry stone, clay Brick, concrete Block, and aggregate Concrete.
A utility contractor wearing a yellow hard hat, safety glasses, high-visibility vest, and a protective respirator mask uses an SDS-max rotary hammer drill equipped with a bull point chisel bit to punch a clean fault line into a vertical concrete structural wall, supported by an adjacent blue HEPA-ready dust extractor vacuum system.
A heavy-duty blue Bosch SDS-max demolition hammer drill equipped with a dust collection shroud and a bull point bit rests balanced on a gray industrial structure layout, positioned directly above an inline blue HEPA-ready dust extractor vacuum unit within an active commercial jobsite interior.
BOSCH

Bosch Demolition Flat Chisels SDS Max 1 Inch R-Tec Steel Bits (16 Overall Length Reflection Element Energy Diverting Concrete Masonry Chipping)

In stock
SKU: HS1903
$14.40 USD

Style
Description

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Bosch SDS-max® R-Tec 1" x 16" Self-Sharpening Flat Demolition Chisel Bits

The Bosch SDS-max® R-Tec 16-inch flat demolition chisel bits fracture cured commercial concrete slabs, masonry brick facades, foundation footings, and mortar beds. Engineered with patented R-Tec energy-diverting reflection technology, these professional chipping accessories redirect kinetic rebound shock straight back into the work substrate to produce 15% faster material removal rates compared to standard flat chisels. Outfitted with an active self-sharpening 1-inch cutting head embedded with lateral breakout wedges that eliminate regrinding downtime, an Italian drop-forged alloy steel body that dampens vibration feedback, and a universal slotted SDS-max drive shank, they equip commercial concrete contractors, demolition crews, and masonry trades with relentless cutting throughput across combination rotary hammers and chipping breakers.

Best Used For:

  • Commercial Concrete Slab and Trench Chipping: Chipping utility troughs, breaking conduit paths, and leveling cured concrete floor slabs around embedded rebar without bit sticking.
  • Foundation and Footing Surface Preparation: Removing spalled concrete, taking down concrete formwork seams, and trimming high spots on foundation walls.
  • Masonry Brick and Mortar Bed Demolition: Slicing through structural CMU cinder blocks, clay brick facings, and hard mortar joints during interior and exterior structural remodeling.

Key Performance & Safety Features

  • 15% Greater Material Removal: Innovative R-Tec reflection element redirects rebound shock waves forward into the workpiece to accelerate aggregate breakdown.
  • Self-Sharpening Head Profile: Flat blade architecture utilizes integrated breakout wedges to maintain a crisp cutting edge under severe friction, eliminating manual sharpening stops.
  • Vibration-Dampening Ergonomics: Disperses punishing percussive feedback directly into the masonry substrate, substantially reducing hand-arm vibration strain for the operator.
  • Universal SDS-Max Fitment: Precision-machined slotted shank fits all standard SDS-max rotary hammers and demolition breakers, including Hilti TE-Y and TE-FY chuck systems.
  • Monolithic One-Piece Construction: European drop-forged alloy steel core eliminates welded joints or weak points, providing direct kinetic energy transmission to the cutting edge.
  • Anti-Jamming Breakout Wedges: Lateral head ribs induce rapid fracture propagation in dense concrete, preventing the flat blade from wedging in deep slots.

What's Included

  • (1) Bosch SDS-max® R-Tec 1 In. x 16 In. Flat Chisel Bit in User-Selected Model Specification:
    • HS1903: 1" Width x 16" Overall Length SDS-max R-Tec Flat Chisel Bit with Reflection Element
    • HS1935: 1" Width x 16" Overall Length SDS-max R-Tec Self-Sharpening Flat Chisel Bit with Breakout Wedges

Technical Specifications

Manufacturer Brand Bosch Power Tools
Product Line Association R-Tec High-Performance Demolition Steel Series
Selectable Model Numbers HS1903, HS1935
Tool Accessory Classification SDS-max Flat Demolition Chisel Bit
Chisel Blade Width 1.000 Inches (25.40 mm Blade Width)
Overall Tool Length 16.000 Inches (406.40 mm Total Length)
Tool Shank Interface Standard SDS-max® Slotted Universal Drive (Fits Hilti TE-Y / TE-FY)
Bit Technology Type R-Tec Kinetic Energy Reflection Technology
Material Removal Efficiency 15% Faster Material Removal vs Conventional Flat Chisels
Blade Edge Maintenance Active Self-Sharpening Geometry with Breakout Wedges
Core Metallurgy Composition Proprietary Heat-Treated Drop-Forged Alloy Tool Steel
Operational Mode Setting Hammer-Only / Chipping Mode (Disengage Rotation)
Country of Origin Italy
Power Tool Compatibility Corded & Cordless SDS-max Rotary Hammers & Breakers
Measurement Standard Fractional Imperial (SAE) Standard Dimensions
Suitable for material type Cured Concrete, Brick Facades, Mortar Beds, & CMU Block

Pro-Tip: Maintain a 45-degree angle of attack when chipping concrete edges; this orientation allows the R-Tec reflection collar and lateral breakout wedges to shear off slabs along natural stress lines without burying the chisel face into the substrate.