Quick Answer

Grinding shoes attach to planetary floor grinders through a driver plate, and the interface depends on the machine brand: Husqvarna uses Redi-Lock metal-backed segments, HTC uses a 25 mm pin/clip shoe or adapter plate, while Lavina, Scanmaskin and Klindex share the universal three-pin (3-head) driver plate pattern. JOY TECH manufactures grinding shoes and PCD tooling for all of these interfaces, so contractors can match OEM-style mounting without changing machines.

Planetary Machine Interfaces Explained

Machine brand	Interface / mounting	Typical tooling
Husqvarna PG series	Redi-Lock metal-backed segments	Redi-Lock grinding shoes, PCD segments
HTC 650 / 950	HTC shoe with adapter plate (25 mm pin)	HTC-style trapezoid shoes, PCD coating removers
Lavina G series	Universal 3-head driver plate	Trapezoid shoes (TP), PCD tooling
Scanmaskin 32 / 38	Universal 3-head driver plate	Trapezoid shoes, resin pads via adapter
Klindex EXP series	Universal 3-head driver plate	Trapezoid shoes, diamond discs

Husqvarna and Redi-Lock Tooling

Husqvarna planetary grinders use the Redi-Lock system: metal-backed diamond segments click into the driver head without screws. If you own a PG 280, 400 or 680, buy Redi-Lock-compatible grinding shoes or PCD segments. Many Chinese factories, including JOY TECH, make Redi-Lock tooling to OEM tolerances, which keeps per-segment cost well below Husqvarna-branded consumables.

HTC, Scanmaskin and the Adapter Plate

HTC grinders traditionally use their own trapezoid shoe with a clip or pin mounting, and Scanmaskin machines accept the same universal plates. Instead of owning separate tooling for every machine, contractors standardize on the universal three-head plate and run triple-round-segment trapezoid grinding discs (JOY-TP-R3) on Lavina, Scanmaskin and Klindex heads. For HTC machines, adapter plates convert the HTC head to accept universal trapezoid shoes.

Lavina and Klindex Universal 3-Head Machines

Lavina (G20/G25/G32) and Klindex (EXP) use the same universal three-pin driver pattern, so tooling is interchangeable between these brands. This is the widest compatibility group in the industry: one set of trapezoid shoes fits most Lavina, Scanmaskin, Klindex, Edco and many generic planetary machines. Single-rhombus trapezoid shoes (JOY-TP-RH1) work on the same plate pattern and suit Iron Horse machines too.

How to Check Your Machine's Mounting

• Count the pins: three pins arranged in a triangle = universal 3-head plate; two curved slots = HTC; click-in segments = Redi-Lock.
• Measure the plate diameter: 250 mm, 280 mm and 330 mm plates accept different shoe sizes.
• Check the bolt spacing: universal plates use M8 or M10 bolts with fixed spacing; never force a shoe that does not align.
• Ask the factory: send a photo of your driver plate to the supplier and confirm the interface before ordering.

Segment Types by Job

• PCD segments — for epoxy, mastic and coating removal on all planetary machines (Werkmaster PCD tooling fits universal plates).
• Metal bond (coarse) — grinding and leveling 30 grit and below.
• Hybrid / resin bond — transition from grinding to polishing.
• Resin pads — final polishing steps 100 grit and above, usually via a resin pad adapter.

Frequently Asked Questions

Q: Are Husqvarna grinding shoes compatible with Lavina machines?

A: No. Husqvarna uses the Redi-Lock click-in system while Lavina uses the universal 3-head bolt-on plate. Use a Redi-Lock-to-universal adapter or buy tooling per interface.

Q: Can I use HTC shoes on a Scanmaskin grinder?

A: Not directly. HTC shoes use the HTC pin/clip interface. Use an adapter plate that converts the HTC head to the universal pattern, then run trapezoid shoes.

Q: What is the most universal grinding shoe interface?

A: The universal 3-head (three-pin) plate. It fits Lavina, Scanmaskin, Klindex, Edco and most generic planetary grinders, giving contractors one tooling set across multiple machines.

Q: Do Redi-Lock segments work on HTC machines?

A: Only with a Redi-Lock driver adapter. Otherwise HTC heads require HTC-style shoes or a universal adapter plate.

Conclusion

Matching grinding shoes to your planetary machine comes down to one question: what driver plate does the head use? Standardize on the universal 3-head interface where possible, keep PCD segments for coating jobs, and buy OEM-quality tooling from a factory that can supply all interfaces — like JOY TECH's double-S trapezoid discs. Send us a photo of your driver plate and we will confirm the right shoe before you order.