Indasa 3" Rhynolock Zirconium Locking Discs, R-Type, 7303Z Series
Product Overview
Indasa Rhynolock 3" Zirconium Locking Discs – 7303Z Series are high‑performance coated abrasive discs engineered for aggressive stock removal, weld burr removal, deburring, edge breaking, and surface leveling. These discs use premium Zirconia Alumina grain designed for high pressure grinding, superior heat resistance, and long life on hard metals.
The discs feature a durable plastic plate + X‑cloth backing that is crease‑ and tear‑resistant, making them ideal for demanding industrial applications. The QuickFix R‑Type (Type III) roll‑on screw attachment allows fast disc changes without tools, improving productivity in high‑volume environments.
Available in P24, P36 and P50 grits, these 3" discs excel on ferrous metals, stainless steel, hard metals, exotic alloys, and composites.
Packaged 25 discs per box.
Features & Benefits
- Zirconia Alumina grain for high pressure grinding and superior heat resistance
- High initial cutting action for rapid stock removal
- Highly resistant backing for crease and tear resistance
- High‑strength resin bond minimizes grit shedding
- QuickFix R‑Type screw attachment for fast, tool‑free disc changes
- Ideal for weld burr removal, heavy grinding, and hard metal applications
Suitable Materials
- Steel and stainless steel
- Hard metals
- High‑nickel alloys
- Titanium
- Exotic alloys
- Metal matrix composites
- Hard composites
- Fiberglass
- Old paint
Recommended Applications
- Weld burr removal
- Weld seam cleanup
- Heavy duty grinding
- Aggressive stock removal
- Deburring and edge breaking
- Surface leveling and blending
- Mold and cavity grinding
- Grinding hard composites and exotic metals
Product Specifications
- Abrasive: Zirconia Alumina
- Backing: Plastic plate + X‑cloth
- Attachment: R‑Type (Type III, Roloc® compatible)
- Size: 3" diameter
- Grits: P24, P36, P50
- Bonding: Modified synthetic resins
- Type: Dry use
- Max RPM: 20,000
- Quantity: 25 discs per box
Comparison With Other Major Brands
Indasa 7303Z Zirconium Locking Discs follow the same industry‑standard construction used by other high‑performance quick‑change grinding discs. The table below compares Indasa Zirconium discs to similar products in terms of grain type, backing, and performance characteristics.
| Brand | Abrasive Grain | Backing | Attachment | Notes |
|---|---|---|---|---|
| Indasa 7303Z | Zirconia Alumina | Plastic plate + X‑cloth | R‑Type QuickFix | High heat resistance; ideal for hard metals |
| Norton R822 / R823 | Zirconia Alumina | Cloth | TR/TS Roloc® | Similar high‑pressure grinding performance |
| Merit Zirconia Mini Grind | Zirconia Alumina | Cloth | Roloc® compatible | Comparable stock removal and durability |
| sia 1353 Standard Zirconia | Zirconia Alumina | Cloth | Roloc® compatible | Strong zirconia performance on stainless and hard metals |
| 3M Roloc® Zirc | Zirconia Alumina | Cloth | Roloc® TR™ | Industry‑standard zirconia grinding discs |
Comparison data is provided for general reference only. Specifications may vary by manufacturer, product batch, or region and should be verified with each brand.
SMSDistributors Expert Notes
The 7303Z Series offers the same aggressive cutting performance as the 2" version, but with a larger 3" footprint for increased coverage and smoother grinding on wider surfaces. Zirconia Alumina grain excels under high pressure, making these discs ideal for stainless steel, titanium, exotic alloys, and hard composites.
The QuickFix R‑Type attachment ensures fast disc changes, improving productivity in automotive, marine, industrial, and fabrication environments. These discs are a reliable alternative to Norton, Merit, sia, and 3M zirconia quick‑change discs.