How do I choose the right bond hardness for diamond tooling?

Use soft bonds on hard, dense concrete (high PSI) and hard bonds on soft or porous concrete. For most commercial floors, a medium bond is the safest starting point. Call us at (802) 489-0828 and we'll spec the right bond for your specific floor condition and machine.

Are these diamond tools compatible with my grinder?

US Abrasives stocks tooling compatible with all major grinder brands including Klindex, Lavina, Husqvarna, Superabrasive, STI Prep/Master, HTC, Blastrac, Diamatic, and Onyx. Tell us your machine model and we'll confirm fit before you order.

How fast does my order ship?

In-stock orders placed before 2 PM CST ship same day Monday through Friday via FedEx or UPS Ground. Most U.S. deliveries arrive within 2–5 business days. Expedited shipping is available — call (802) 489-0828 for a quote.

What diamond grit should I start with on a concrete floor?

For most concrete grinding and prep work, start with 16–30 grit metal bond diamonds to open the floor and remove coatings or adhesive. Then progress through 40–60 grit, transition to resin bonds at 100–200 grit for honing, and finish with 400–3000 grit resin pads for polishing. Your starting grit depends on floor hardness and what you're removing.

What tools remove epoxy coatings or glue from concrete?

PCD (polycrystalline diamond) scrapers and hard-bond diamond cup wheels are most effective for removing thick epoxy coatings and adhesive residue from concrete. For thinner coatings, soft-bond metal diamonds work well. We can spec the right tool for your coating type and thickness.

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ASL USA

ASL 550-T7 Floor Grinding Machine

Q: Do you offer volume or quantity discounts?

Yes. Volume pricing is available on orders of 10 or more pieces of the same item. Call (802) 489-0828 or email info@fast-prep.com to discuss pricing for your crew or job.

$6,954.99 USD

Sale Sold out

Shipping calculated at checkout.

Product variants

Quantity

✓ Ships M–F via FedEx & UPS · ✓ Same-day shipping on orders before 2 PM · ✓ Expert support: (802) 489-0828

Financing Opportunities Available

The aluminum alloy gearbox and planetary gear driver are capable of reaching a remarkable flat grind to produce smooth surfaces as well as a powerful repairing scratches function. There is a folding handle and split body design for a more convenient way to carry and transport the machine. The automatic leveling system has excellent flexibility to evenly touch the floor and perfectly balance the machine. Through the integrated system of the suction port, the machine grind and polish wet or dry. There are three different models available for this 21 inch grinder.

Description

MODEL	A	B	C
VOLTAGE	380-440v \| 3 Phase	220-240V \| 1 or 3 Phase	380-440V \| 3 Phase
CURRENT	13A	17A	13A
MOTOR	5.5 HP (4 KW)	7.5 HP (5.5 KW)	7.5 HP (5.5 KW)
INVERTER	5 HP (3.7 KW)	10 HP (7.5 KW)	10 HP (7.5 KW)
FREQUENCY	50/60 HZ	50/60 HZ	50/60 HZ
DISK SPEED	300-1600 RPM	300-1200 RPM	300-1200 RPM
GRINDING WIDTH	21 in (550 mm)	21 in (550 mm)	21 in (550 mm)
DISK DIAMETER	9 in X 3 (230 mm x 3)	9 in X 3 (230 mm x 3)	9 in X 3 (230 mm x 3)
WATER TANK	8 Gallons (30 L)	8 Gallons (30 L)	8 Gallons (30 L)
WEIGHT	320 lbs (145 kg)	342 lbs (155 kg)	342 lbs (155 kg)
DIMENSION	38" x 22" x 33" (970 x 550 x 850 mm)	38" x 22" x 33" (970 x 550 x 850 mm)	38" x 22" x 33" (970 x 550 x 850 mm)

Technical Specs

Grinder Compatibility

Shipping & Freight

Standard orders: Most in-stock items ship M–F via FedEx or UPS Ground. Orders placed before 2:00 PM CST typically ship same day.

Freight shipments: Heavy equipment and large orders ship LTL. Our team will contact you to coordinate delivery.

Expedited shipping: Next-day and 2-day air available on request. Call (802) 489-0828 for a quote.

Returns: Unused items may be returned within 30 days in original packaging. Custom or special-order tooling is non-returnable. Contact info@fast-prep.com to initiate.

Frequently Asked Questions

How do I choose the right bond hardness?
Use soft bonds on hard concrete (high PSI/dense) and hard bonds on soft concrete. For most commercial floors, Medium is the safest starting point. Call us at (802) 489-0828 and we'll spec the right bond for your floor condition.

Are your plates compatible with my machine?
We stock tooling for Klindex, Lavina, Husqvarna, Superabrasive, and most other planetary grinders. Tell us your machine model and we'll confirm fit before you order.

Do you offer quantity discounts?
Yes. Volume pricing is available on orders of 10+ pieces of the same item. Call (802) 489-0828 or email info@fast-prep.com to discuss.

How quickly will my order arrive?
In-stock orders placed before 2 PM CST ship same day M–F. Most U.S. deliveries arrive within 2–5 business days via FedEx or UPS Ground.