Quick Answer

The grinding disc that fits your floor grinder is determined by three things: the tool holder system (Redi-Lock, bolt-on, HTC, WerkMaster, etc.), the tool shape (trapezoid, puck, round), and the bolt pattern or hole size. Match those three and the disc fits—regardless of who made it. JOY TECH makes discs compatible with Husqvarna, HTC, WerkMaster, Scanmaskin, Lavina, and Klindex machines.

The Three Compatibility Questions

1. What holder does your machine use? Redi-Lock, bolt-on, HTC socket, WerkMaster keyhole, Lavina magnetic, or Klindex wedge? This is the single most important question.
2. What shape does the holder take? Trapezoid shoes (most common), round pucks, or square blocks?
3. How many tools per plate? Most 250-580 mm grinders use 3 or 6 tools per rotating plate. This affects balance, not compatibility.

Matching Common Brands

Machine brand	Holder system	JOY TECH equivalent
Husqvarna	Redi-Lock	Husqvarna Redi-Lock PCD discs
HTC	HTC socket / bolt	Custom adapter available
WerkMaster	WerkMaster keyhole	WerkMaster PCD tooling
Scanmaskin	Redi-Lock compatible	Redi-Lock discs
Lavina / Edco	Bolt-on or magnetic	Custom bolt pattern
Klindex	Klindex wedge	Custom adapter

Explore the full range in our concrete grinding discs category.

How to Order Compatible Tooling

Send us three pieces of information:

• Machine make and model (e.g., Husqvarna PG 820)
• A photo of your current tool or adapter plate
• The work you will do (coating removal, light grinding, polishing prep)

We will confirm the exact adapter and recommend bond hardness for your local concrete.

Common Compatibility Mistakes

• Assuming "Redi-Lock" is universal. It is nearly universal, but some Chinese clones have slight dovetail differences.
• Mixing shapes. A trapezoid shoe will not fit a puck holder, no matter how similar the carbide looks.
• Ignoring the bolt pattern. Bolt-on discs from different brands look similar but the hole spacing differs.

Frequently Asked Questions

Q: Can I use aftermarket tools on my expensive grinder?

A: Yes, as long as the holder matches. Aftermarket discs from a reputable factory are typically 40-60% cheaper than OEM and work identically.

Q: How do I know if my Redi-Lock seat is worn?

If tools rattle or move sideways under load, the seat is worn. Replace the adapter plate rather than continuing to grind with loose tools.

Q: Do you ship to my country?

Yes, we export to 50+ countries. contact JOY TECH with your port and we will quote door-to-door or FOB Xiamen.

Conclusion

Grinder compatibility is a holder problem, not a brand problem. Once you know your holder system, a good factory can supply equivalent tooling at OEM-level performance. contact JOY TECH with your machine model and we will confirm the exact fit.