Indasa 3" Rhynolock Aluminum Oxide Locking Discs, R-Type, 7303 Series
Product Overview
Indasa Rhynolock 3" Aluminum Oxide Locking Discs – 7303 Series are high‑performance coated abrasive discs engineered for general purpose grinding, heavy stock removal, deburring, edge breaking, and surface leveling. These discs use premium Aluminum Oxide grain bonded with high‑strength synthetic resins for aggressive cutting action and long service life.
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 grits from P24 to P80, these 3" discs are suited for use on ferrous metals, non‑ferrous metals, plastics, composites, and old paint.
Features & Benefits
- Premium Aluminum Oxide grain for high initial cut and 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
- Consistent grinding performance across metals, plastics, composites, and painted surfaces
- Ideal for aggressive grinding, leveling, and heavy sanding
Suitable Materials
- Steel and stainless steel
- Non‑ferrous metals (e.g. aluminum, copper, brass)
- Hard metals
- Plastics and composites
- Old paint
Recommended Applications
- General purpose grinding
- Heavy duty sanding
- Aggressive stock removal
- Deburring and edge breaking
- Surface leveling and preparation
- Mold and cavity grinding
- Metal burrs and weld seams
Product Specifications
- Abrasive: Aluminum Oxide
- Backing: Plastic plate + X‑cloth
- Attachment: R‑Type (Type III, Roloc® compatible)
- Size: 3" diameter
- Grits: P24, P36, P50, P60, P80
- Bonding: Modified synthetic resins
- Type: Dry use
- Max RPM: 20,000
- Quantity: 25 discs per box
Comparison With Other Major Brands
Indasa 7303 Aluminum Oxide Locking Discs follow the same industry‑standard construction used by other leading manufacturers. The table below shows how they align with other coated abrasive quick‑change discs in terms of construction, grit system, and attachment compatibility.
| Brand | Construction | Grit Range | Attachment | Notes |
|---|---|---|---|---|
| Indasa (7303 Series) | Aluminum oxide coated abrasive on X‑cloth | P24–P80 | R‑Type QuickFix (Roloc® compatible) | High initial cut; crease‑resistant backing |
| Norton R822 / R820 | Aluminum oxide or zirconia alumina on cloth | P24–P120 | TR/TS Roloc® compatible | Similar grinding and stock removal performance |
| Merit Mini Grind | Aluminum oxide on cloth | P24–P80 | Roloc® compatible | Comparable deburring and edge‑breaking capability |
| sia 2925 sialox | Aluminum oxide on cloth | P36–P120 | Roloc® compatible | Similar heavy‑duty grinding and leveling |
| 3M Roloc® A/O | Aluminum oxide coated abrasive | P24–P80 | Roloc® TR™ | Industry‑standard coated abrasive quick‑change discs |
SMSDistributors Expert Notes
The 7303 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. The combination of X‑cloth backing, resin bonding, and premium A/O grain provides excellent durability and predictable grinding performance.
These discs are a reliable alternative to Norton, Merit, sia, and 3M coated abrasive quick‑change discs, offering full compatibility and consistent results across a wide range of materials.
About Us
SMSDistributors.com is an authorized distributor of Indasa Abrasives, supplying professional‑grade grinding, sanding, and finishing products for automotive, marine, metal fabrication, woodworking, and industrial applications. We provide accurate technical data, fast shipping, and expert support to help customers choose the right abrasive for every job.
Category
Category: Grinding Discs, Aluminum Oxide Locking Discs, Indasa 7303 Series