Surface Preparation

Keystone offers multiple surface preparation tools that can be adapted to existing equipment or custom designed to meet any need.


Aftermarket Drum Manufacturing - Keystone can manufacture complete drums for existing equipment for rumble strips, pavement markings removal, crack seal and bridge epoxy removal and slurry and micro surfacing surface preparation.

Bridge Epoxy, Crack Seal, Slurry Seal and Micro Surfacing Removal - Keystone developed Flat Tooth Technology for when any spacing, including micro milling, is too large. The Flat Tooth System cuts 100% of the pavement's surface and is ideal for removing bridge epoxy, crack seal, slurry seal and micro surfacing.

Bump Grinding and IRI Improvement - Keystone manufactures drums for existing equipment and complete skid steer attachments for shaving bumps and other rough areas on pavement to increase IRI numbers. Keystone's Flatliner skid steer attachment is perfect for correcting new pavements and is an ideal maintenance tool for aging pavements.

Micro Milling and Fine Milling

Micro Milling and Fine Milling - Keystone can design and manufacture to meet any micro milling or fine milling specification. Keystone offers a large variety of block systems including the Wedge Lock System which is the only Quick-Change system to give contractors the ability to standard mill and micro mill with the same drum.

Line Removal - Keystone developed Flat Tooth Technology for when any spacing, including micro milling, is too large. The Flat Tooth System cuts 100% of the asphalt’s surface and is ideal for bump grinding, line and coatings removal.

Rumble Strip Grinding - Keystone manufactures replacement drums for all makes and models of rumble strip machines.

Slurry Seal and Micro Surfacing Removal - Keystone developed Flat Tooth Technology for when any spacing, including micro milling, is too large. The Flat Tooth System cuts 100% of the asphalt’s surface and is ideal for bump grinding, line and coatings removal.

Custom Lacing - For anything that may fall in between. Please contact Keystone direct to discuss your specific need.


Block and Tooling Systems

Wedge Lock Quick-Change System

  • Interchangeable blocks for different cutting applications transform a standard milling drum into a micro-mill drum, simply change the holders to achieve a 7.5mm/.3” and even a 5mm/.2” surface pattern
  • Replaceable blocks are positioned on the wear side of the flighting which protects the flighting against wear
  • No threaded parts are welded to the drum providing a longer lasting drum
  • Continuous wrap design provides superior strength
  • Wedge Lock Systems with over 18,000 hours are still in use today
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SS Quick-Change System

  • Interchangeable bits for different grinding applications
  • 100% surface coverage with Keystone's Flat Tooth bit elimiates the need for multiple passes during pavement marking removal
  • Increase production by 3 times when compared to diamond blades and flail teeth
  • Minimize surface damage during the removal process with far less damage seen by the Flat Tooth System than by water blasting equipment and traditional grinding products
  • Completely machined bit and block ensures a uniform surface unlike a milled or diamond ground surface pattern
  • Carbide and diamond bit options available
  • Replacement drums available for all pavement marking removal machines
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RS Quick-Change System
  • Interchangeable bits for different grinding applications
  • 100% surface coverage with Keystone's flat tooth bit eliminates the need for multiple passes during pavment marking removal
  • Increase production by 3 times when compared to diamond blades and flail teeth
  • Minimize surface damage during the removal process
  • Completely machined bit and block ensures a uniform surface
  • Carbide and diamond bit options available
  • Replacement drums available for all pavement marking removal machines
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Rumble Strip Quick-Change System
  • Decrease downtime and eliminate in-field welding
  • Increase production while leaving a smoother and cleaner surface pattern
  • Utilizes Keystone's proven attack angles, decreasing bit consumption
  • Replace inserts easily, unscrew insert with standard tools, no special tools required
  • Taper locking system insures consistent insert locking depth, providing a consistently smooth surface pattern
  • Diamond and carbide bit options available
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Surface Preparation Attachments

Flatliner - Slurry Seal and Micro Surfacing Surface Preparation

Ideal For:

  • Maintenance Work/Bump Grinding
  • Ride Quality/IRI Improvement
  • Pavement Marking Removal
  • Coatings Removal

Skid steer attachment designed to smooth pavement roughness by shaving high spots and other irregularities in a cost effective manner. The Flatliner uses Flat Tooth Technology, a machined and precise holder system to insure a smooth and uniform surface, setting a new industry standard.

  • Precise Depth Control
  • Variable Cutting Widths: 2" to 49"
  • 100% Surface Coverage
  • Precisely levels bumps and other irregularities, acts as a profilograph and bump grinder in one
  • Utilizes Keystone Engineering's patented Flat Tooth Cutting Techonology
  • 100% surface coverage, unlike diamond blades and other traditional carbide conical bits and flail cutters
  • Minimal surface damage seen when comparing to traditional carbide bits and water blasting equipment
  • No water required
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Flatliner Line Remover - Pavement Marking Removal Attachment
  • Optional self-contained vacuum system
  • 100% surface coverage to eliminate the need for multiple passes during pavement marking removal
  • Shaves the pavement’s surface instead of impacting the surface like traditional carbide conical bits that are used in asphalt milling machines
  • Minimized surface damage during pavement marking removal. Far less damage seen by the Flat tooth System than by water blasting equipment and traditional asphalt grinding products
  • Leaves a level and smooth surface unlike a milled surface or a diamond ground surface
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View Flatliner Product Card

Flatliner - Crack Seal Removal Attachment

Ideal For:

  • Maintenance Work/Bump Grinding
  • Ride Quality/IRI Improvement
  • Pavement Marking Removal
  • Coatings Removal

Skid steer attachment designed to smooth pavement roughness by shaving high spots and other irregularities in a cost effective manner. The Flatliner uses Flat Tooth Technology, a machined and precise holder system to insure a smooth and uniform surface, setting a new industry standard.

  • Precise Depth Control
  • Variable Cutting Widths: 2" to 49"
  • 100% Surface Coverage
  • Precisely levels bumps and other irregularities, acts as a profilograph and bump grinder in one
  • Utilizes Keystone Engineering's patented Flat Tooth Cutting Techonology
  • 100% surface coverage, unlike diamond blades and other traditional carbide conical bits and flail cutters
  • Minimal surface damage seen when comparing to traditional carbide bits and water blasting equipment
  • No water required
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View Flatliner Product Card

PCD - Polycrystalline Diamond Bits - Keystone has a large selection of PCD bits in stock. Please call Keystone direct to discuss the best bit for your milling application. 317-271-6192

D-540 PCD Bit - Polycrystalline Diamond Bits

Keystone Engineering's D-540 PCD tool can easily be adapted to any quick-change grinding system.

  • Improve productivity by extending tool life by 40x
  • Reduce fuel consumption by increasing cutting efficiency
  • Reduce overall maintenance cost of the machine by significantly reducing vibration
  • Carbide bolster extends the life of the diamond
  • Creates a smoother and more uniform surface pattern
  • Improve emplyee work environment by requiring fewer tool changes and minimizing machine vibration
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Carbide Bits - Keystone has a large selection of carbide bits in stock. Please call Keystone direct to discuss the best bit for your milling application. 317-271-6192

KEM-6 - Carbide Milling Bit

Bit Designed for Medium to High Horsepower Milling Machines

  • Patented non-rotating washer used to prevent block/holder face wear
  • Universal cutting bit that can be used on all OEM drum systems
  • Extended retainer for even block/holder wear
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KEM-7 - Carbide Milling Bit

Bit Designed for Medium to High Horsepower Milling Machines

  • Patented non-rotating washer used to prevent block/holder face wear
  • Universal cutting bit that can be used on all OEM drum systems
  • Extended retainer for even block/holder wear
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Custom Equipment Design and Manufacturing - Keystone can design and manufacture equipment to meet your specific needs. Please call Keystone direct to discuss custom design and manufacturing. 317-271-6192