What Are Metal Bonded Diamond Tools?
Metal bonded diamond tools are used for grinding exposed concrete.
Industrial diamond particles are held inside a metal matrix. As the tool works, the metal bond wears and exposes fresh diamond cutting points.
Typical applications include:
- opening a concrete surface;
- removing high spots;
- leveling minor irregularities;
- controlling scratches;
- exposing aggregate;
- preparing concrete for hybrid and resin polishing;
- refining marks left after coating removal.
Metal bond tools are produced in different grits, bond hardnesses, segment shapes, and machine connections because every floor and grinder setup behaves differently.
Available options can be reviewed under metal bond grinding tools.
Metal Bonded Diamond Tools Are Not the Same as Every Diamond Tool
The phrase “diamond tools” covers several product families.
For concrete floor work, the main groups are:
- PCD coating-removal tools;
- metal bond grinding tools;
- hybrid transition pads;
- resin polishing pads;
- machine-specific diamond pucks and grinding shoes.
Each group performs a different stage.
A common workflow is:
PCD coating removal → metal bond grinding → hybrid transition → resin polishing
A bare concrete floor may begin directly with metal bond tools. A floor covered with epoxy, glue, paint, or mastic may require PCD tooling before normal concrete grinding begins.
PCD Diamond Tools vs. Metal Bond Diamond Tools
PCD coating-removal tools and metal bond tools should not be treated as interchangeable.
PCD tools are used for:
- epoxy removal;
- carpet glue;
- adhesive residue;
- paint;
- mastic;
- waterproof coatings;
- thick or elastic surface materials.
Metal bond tools are used for:
- grinding exposed concrete;
- removing marks left by PCD tooling;
- opening the slab;
- leveling minor high areas;
- controlling the scratch pattern;
- preparing the floor for polishing.
The simplest distinction is:
PCD removes the coating. Metal bond diamonds grind the concrete.
Once the coating has been removed, continuing with aggressive PCD tooling can create unnecessary scratches in the exposed slab.
What Are Diamond Pucks?
“Diamond pucks” is a broad term for compact diamond tools installed under a concrete floor grinder.
A puck may use:
- metal bond;
- hybrid bond;
- resin bond;
- hook-and-loop backing;
- quick-change tabs;
- bolt-on mounting;
- a proprietary machine connection.
The word “puck” describes the tool format more than the exact workflow stage.
Before ordering diamond pucks, confirm:
- Bond type
- Grit
- Grinder model
- Back connection
- Tool diameter
- Required quantity
- Wet or dry operation
A metal bond puck and a resin polishing puck may look similar in size but perform completely different jobs.
How to Choose the Correct Metal Bond
The bond controls how the metal matrix wears and exposes fresh diamond.
A practical general rule is:
- Hard concrete → softer bond
- Medium concrete → medium bond
- Soft or abrasive concrete → harder bond
On hard concrete
A bond that is too hard may retain worn diamond and begin glazing.
The tool may slide over the floor without cutting effectively.
On soft or abrasive concrete
A bond that is too soft may wear rapidly because the floor continually removes the metal matrix.
This can shorten tool life even if the initial cutting speed appears high.
Concrete hardness should not be judged from color or appearance alone.
Better evidence includes:
- previous tool performance;
- a concrete hardness test;
- a controlled test area;
- cutting speed during the first pass;
- segment wear;
- whether the tool begins glazing.
How to Choose the Starting Grit
The starting grit should be based on what the floor still needs.
Coarse metal bond grits
Choose a coarse grit when:
- aggressive slab opening is required;
- deeper PCD scratches remain;
- the floor is rough or uneven;
- high spots need correction;
- the first grinding cut must remove more material.
Medium metal bond grits
Choose a medium grit when:
- the aggressive opening stage is complete;
- the floor needs general grinding;
- the scratch pattern needs refinement;
- the next step will be a finer metal or hybrid tool.
Finer metal bond grits
Choose a finer metal grit when:
- the slab still requires metal-bond cutting;
- deeper scratches are already controlled;
- the floor is approaching the transition stage.
Do not assume that a certain grit is always the correct starting point.
The previous surface condition, concrete hardness, machine weight, segment count, and required next step all affect the choice.
Grit Number and Bond Are Separate Specifications
A tool should not be ordered as “30 grit” without also considering its bond.
Two 30-grit tools may have:
- different bond hardness;
- different segment shapes;
- different diamond concentration;
- different segment counts;
- different machine connections.
They can behave very differently on the same floor.
A complete specification should include:
Machine connection + segment design + grit + bond + quantity
Single-Segment vs. Double-Segment Tools
Segment count affects the pressure applied through each cutting point.
Single-segment tools
Single-segment tools concentrate more pressure into a smaller contact area.
They may be selected when:
- stronger cutting is required;
- the grinder is relatively light;
- the slab needs more aggressive opening;
- production speed is more important than a smoother scratch.
Double-segment tools
Double-segment tools distribute the machine pressure across more contact area.
They may provide:
- smoother machine operation;
- more stable floor contact;
- a more controlled scratch pattern;
- suitable performance on heavier grinder setups.
The correct choice depends on machine weight, tool quantity, concrete condition, and the result required from the current stage.
Segment Shape Also Changes Grinding Behavior
Metal bond tools may use:
- rectangular bars;
- round buttons;
- arrow segments;
- oval segments;
- wing segments;
- split bars;
- trapezoid segments.
Segment shape can affect:
- contact area;
- cutting aggression;
- debris movement;
- machine stability;
- scratch pattern;
- performance on coating residue or exposed concrete.
However, segment shape alone does not confirm the correct application.
Grit, bond, machine pressure, and concrete hardness remain equally important.
Machine Fitment Must Be Confirmed
Metal bonded diamond tools are produced for many machine systems, including Lavina, Husqvarna, HTC, Scanmaskin, SASE, WerkMaster, CPS, Terrco, and other floor grinders.
A tool may have the correct grit and bond but still be unusable if its back connection does not fit the grinder.
Before ordering, confirm:
- complete machine model;
- existing grinding plate;
- back connection of the current tool;
- mounting-hole pattern;
- required quantity;
- tool height;
- rotation direction, when relevant.
Contractors can use the Shop by Machine page to identify the correct machine-specific tooling family.
Lavina Diamond Tooling
Lavina grinders commonly use QuickChange-style tooling for coating removal, metal grinding, transition, and polishing.
Contractors searching for Lavina diamonds may need:
- Lavina PCD tools;
- Lavina metal bond segments;
- hybrid transition pads;
- resin polishing tools;
- adapter plates.
The Lavina grinder tooling page groups these tools by workflow stage.
Do not assume every Lavina-style tool fits every grinder generation without checking the machine model, plate, tool connection, required quantity, tool height, and rotation direction.
How Metal Bond Tooling Fits Into Polished Concrete
Metal bonded diamond tools complete the early cutting and scratch-refinement stages of a polished-concrete process.
Their role is to create a flat and consistent concrete surface before the operator moves into transition and polishing tools.
A practical workflow may be:
Step 1: Remove coatings when required
Use suitable PCD tooling when epoxy, glue, paint, mastic, or another coating is blocking the concrete.
Step 2: Open and grind the concrete
Use metal bond tools selected according to concrete hardness, surface condition, and the required starting grit.
Step 3: Refine the metal scratch
Continue through the required metal grits until deep random scratches and uneven areas are controlled.
Step 4: Use hybrid transition pads
Move into hybrid transition pads when structural grinding is complete but the remaining metal scratch is still too visible for direct resin polishing.
Hybrid tools refine the metal scratch and create a controlled transition into later polishing stages.
Step 5: Begin resin polishing
Use resin polishing pads after the floor has been prepared evenly and no longer requires aggressive correction.
Resin polishing develops clarity and gloss, but scratches left by earlier grinding stages can become more visible as the floor gains reflection.
Concrete Polishing Pads for a Floor Buffer
Large-diameter polishing pads for floor buffers belong to later polishing or maintenance stages.
They may be used for:
- finish refinement;
- light honing;
- periodic re-polishing;
- floor maintenance;
- improving the appearance of an existing polished floor.
They should not be expected to replace:
- coating removal;
- slab opening;
- high-spot correction;
- deep metal-scratch removal;
- unfinished transition work.
A floor-buffer pad, metal grinding puck, and machine-specific resin tool may all contain diamond abrasive, but they are designed for different equipment and working pressure.
Common Metal Bond Tooling Mistakes
Choosing the tool by grit alone
Grit does not identify bond, fitment, or segment structure.
Ordering by machine brand only
A machine brand does not confirm the exact model, holder, or connection.
Starting with metal tools on thick elastic coatings
A PCD or dedicated coating-removal tool may be required first.
Moving into hybrid pads too early
Hybrid tools refine scratches but should not be expected to flatten unfinished concrete.
Moving into resin before controlling the metal scratch
The floor may gain gloss while deeper lines remain visible.
Assuming every diamond puck performs the same job
Metal, hybrid, and resin pucks belong to different workflow stages.
Ignoring tool height
All tools installed under one grinding head should contact the floor evenly.
Mixed heights can create vibration, inconsistent pressure, and irregular scratch patterns.
Metal Bond Diamond Tool Selection Checklist
Before ordering, provide:
- Grinder brand and complete model
- Photograph of the machine plate
- Front and back photographs of the existing tool
- Concrete hardness or previous tool performance
- Current floor condition
- Coating type, if present
- Required grit
- Required bond
- Segment shape and count
- Wet or dry operation
- Required tool quantity
- Planned next workflow stage
Are Metal Bonded Diamond Tools Used for Polishing?
Metal bond tools are used primarily for concrete grinding and early scratch refinement.
They prepare the floor for polishing, but final clarity and gloss are normally developed with hybrid and resin tools.
Can PCD Tools Replace Metal Bond Grinding Tools?
No.
PCD tools are primarily used to remove coatings and surface materials.
Metal bond tools are used afterward to grind and refine the exposed concrete.
Can the Same Metal Bond Tool Be Used on Every Concrete Floor?
No.
Tool performance depends on:
- concrete hardness;
- abrasiveness;
- machine weight;
- working speed;
- segment count;
- wet or dry operation;
- starting grit;
- bond selection.
Complete a controlled test area when floor hardness or tool behavior is unclear.
Final Recommendation
Choose metal bonded diamond tools in this order:
- Confirm the grinder and tool connection
- Identify whether the floor is coated or exposed concrete
- Evaluate concrete hardness
- Choose the correct bond
- Select the starting grit
- Select segment shape and count
- Complete a test area
- Move forward only after the previous scratch has been controlled
When the machine fitment, concrete hardness, grit, bond, or workflow stage is unclear, send the grinder model, plate photographs, existing-tool photographs, and floor condition through Contact Us before ordering.