When a concrete slab has to be roughened fast - blistered surface broken off, an old coating taken down to sound substrate, or a smooth trowelled floor opened up so a repair mortar or overlay will actually bond - a scarifier fitted with 5-point carbide bits is the tool that does it in one pass instead of five. This is the EDCO 18810 5-point tungsten carbide bit assembly for CD-5 and CD-3 Crete-Planer scarifiers. Each bit penetrates up to 1/4 inch per pass and leaves the aggressive, open texture that bonding agents and self-levelers need.
Concrete contractors, facility maintenance crews and restoration teams buy these as wear parts. Carbide points are consumable: they dull, they chip, and a drum running mixed worn and fresh cutters chatters, cuts unevenly and beats up the drum shaft. Keeping a stock of assemblies on the truck is what keeps a scarifier cutting at rated depth instead of skating across the floor.
Built for
- EDCO CD-5 and CD-3 Crete-Planer scarifiers
- Aggressive removal where a grinder is too slow or too shallow
- Crews who need a bonding profile, not a polished finish
- Replacing dull, chipped or missing cutters on an existing drum
Use cases
- Breaking up blistered or spalling concrete - the 5-point tip bites into delaminated surface and knocks it off down to sound material.
- Removing floor coatings - epoxy, urethane, thick paint and elastomeric membranes that load up a diamond cup wheel.
- Creating a bonding profile - the rough texture left behind is what a repair mortar, overlay or new coating keys into. A slick surface is the most common cause of a failed overlay.
- General surface removal and leveling - taking down high spots, ridges and trowel marks before a floor goes down.
- Traction grooving on ramps, loading docks and wash-down areas.
Specifications
- Cutter type: 5-point tungsten carbide bit assembly
- Cut depth: up to 1/4 inch per pass
- Texture left: rough, open, suited to bonding
- Fits: EDCO CD-5 and CD-3 scarifier drums
- Quantity: this is for ONE 5-point carbide assembly bit, part 18810
Frequently asked questions
Is this one bit or a full drum set?
It is one 5-point carbide assembly bit. A scarifier drum holds many cutters, so count the positions on your drum and order the quantity you need. Most crews replace a full row or the whole drum at once so every cutter wears evenly.
What is the difference between a 5-point carbide bit and a diamond grinding wheel?
Carbide cutters chip and fracture the surface, removing material fast and leaving a rough profile. Diamond tooling abrades the surface, removing less per pass and leaving a smoother finish. Use carbide when you need depth and a bonding profile, diamond when you need a flat or polished result.
Can I mix new bits with worn ones on the same drum?
It is not recommended. Mismatched cutter heights make the drum cut unevenly, cause vibration and chatter, and put extra load on the drum shaft and bearings. Replace cutters as a set.
Will 5-point carbide bits remove epoxy coatings?
Yes. Carbide handles thick coatings and elastomeric membranes that tend to load and glaze diamond tooling. For very thin coatings on a floor that must stay flat, diamond tooling is usually the better choice.
Does this fit a CD-3 as well as a CD-5?
Yes, EDCO lists the 18810 5-point carbide bit for both the CD-5 and the CD-3 Crete-Planer scarifiers.
Discount Cleaning Products is an authorized dealer for this line, with US-based support staff who work with these machines every day. If you are not certain this is the right part or size for your equipment, contact us before you order and we will confirm compatibility against your model number.
