Quick Answer

For removing about 5 mm, carbide scarifiers are faster, but diamond grinding shoes produce a flatter, cleaner surface that needs less follow-up work. Use carbide when you must cut deep and fast, then finish with diamond shoes for the texture you want. For thin coatings and leveling, diamond shoes alone are usually enough.

How the Two Tools Differ

Factor	Carbide scarifier	Diamond grinding shoes
Material removal	Fast, aggressive, 3-10 mm per pass	Light-to-medium, 0.5-2 mm per pass
Surface texture	Rough, grooved	Smooth and flat
Vibration	High	Lower
Follow-up work	Grinding needed afterward	Minimal
Best for	Heavy removal, old coatings	Leveling, thin coatings, prep

When Diamond Shoes Win for 5 mm Work

If your 5 mm target is spread across a large floor, a scarifier will chew through it quickly, but it leaves a rough, uneven texture that still needs a grinding pass. Diamond shoes — especially a coarse trapezoid design like the Single Rhombus Segment Diamond Trapezoid Grinding Disc for Iron Horse (JOY-TP-RH1) — remove material in controlled passes and leave the floor close to final flatness.

When Carbide Is the Right Choice

• Removing thick mastic, epoxy, or rubber coatings.
• Cutting down high spots faster than grinding allows.
• Profiling floors with severe contamination.

Pair the scarifier with diamond shoes afterward to clean the texture and prepare the surface.

How to Run Diamond Shoes for Scarification

1. Use the coarsest diamond shoe in the set (30-40 grit).
2. Keep pressure moderate and speed steady — too much heat glazes segments.
3. Overlap passes by half the disc width.
4. Vacuum continuously so removed material does not get re-pressed into the surface.

Frequently Asked Questions

Q: Can diamond shoes remove 5 mm of concrete?

A: Over multiple passes, yes, but slowly. For that depth, a carbide scarifier followed by diamond shoes is usually faster overall.

Q: Do diamond shoes last longer than carbide teeth?

A>Diamond shoes last much longer on concrete, but carbide removes material faster while it is sharp. Cost per square meter decides which is better on your job.

Q: Will scarifying damage the concrete?

A>Carbide scarifying can chip aggregate and leave stress lines. Diamond grinding is gentler and leaves a sound surface.

Q: What grit shoe should I use after scarifying?

A>Start at 30-50 grit metal to clean the texture, then continue the normal grit sequence.

Conclusion

For 5 mm removal, combine speed and finish: carbide scarifier for depth, then diamond shoes for a flat, clean surface. A coarse diamond trapezoid disc from the Double Rhombus Segment Diamond Trapezoid Grinding Disc (JOY-TP-RH2) family does the finishing pass without leaving grooves. Ask JOY TECH for a scarification-plus-finish tooling kit for your machine.