Norton Gemini R766 ZA Flap Disc, 4.5" x 7/8", Plastic Hub, Flat T27, Zirconia Alumina
Product Overview
Norton Gemini R766 ZA Flap Disc, 4.5" x 7/8", Plastic Hub, Type 27 (Flat) features alternating zirconia alumina and aluminum oxide flaps for higher performance than aluminum oxide alone while maintaining an economical price point. This blend delivers aggressive cutting action, improved life, and smoother operation across a wide range of metals.
The Type 27 flat design is ideal for grinding at a 0°–15° angle on flat surfaces, making it perfect for blending, smoothing, and controlled stock removal. The plastic hub provides improved conformability and lighter weight for smoother operation.
Available in 36, 40, 60, 80, and 120 grits to support everything from heavy stock removal to final finishing. Sold 10 discs per box.
Note, plastic color will be blue or green depending on production run.
Features & Benefits
- Alternating zirconia alumina and aluminum oxide flaps deliver higher performance than aluminum oxide alone
- Type 27 (Flat) design for blending and finishing on flat surfaces at 0°–15°
- Plastic hub provides improved conformability and lighter weight for smoother operation
- Excellent choice for coarse grit blending, deburring, and stock removal
- Suitable for soft metals, stainless steel, carbon steel, cast iron, super alloys, and titanium
Grit Selection Guide
- 36 grit (Extra Coarse): Heavy stock removal, beveling, edge chamfering
- 40 grit (Coarse): Stock removal, weld cleanup, aggressive deburring
- 60 grit (Medium): Controlled stock removal, blending, refining grind marks
- 80 grit (Medium): Light blending, cleaning, smoothing surfaces
- 120 grit (Fine): Final finishing and surface preparation before coating
Why Choose Flap Discs?
Flap discs replace both grinding wheels and fiber discs, offering versatility from heavy stock removal to fine blending with a single tool.
Flap Discs vs. Grinding Wheels
- Faster stock removal
- Smoother finish with less gouging
- Cooler cutting, reduced glazing
- Lighter weight and easier control
- Lower vibration and operator fatigue
- Reduced noise
Flap Discs vs. Fiber Discs
- Up to 20× longer life
- Fewer disc changes and lower labor cost
- More consistent finish
- No backup pad required
- No curling or storage issues
- Reduced loading
- Use flap discs one grit coarser than fiber discs (except 36 grit)
Specifications
- Abrasive: Zirconia Alumina / Aluminum Oxide (alternating)
- Abrasive Type: Coated
- Backing Material: X‑weight Cotton
- Color: Blue or Green
- Diameter: 4.5"
- Arbor Hole: 7/8"
- Wheel Type: Type 27 (Flat)
- Hub Type: Plastic
- Grits: 36, 40, 60, 80, 120
- Max Operating Speed: 13,300 RPM
- Series: R766
- Sub‑Brand: Gemini
- Tier: Good
- Quantity: 10 discs per box
Recommended Applications
- Blending
- Deburring
- Rust removal
- Stock removal
- Surface preparation
Suitable Materials
- 300 Series Stainless Steel
- 400 Series Stainless Steel
- Carbon Steels (hard & soft)
- Cast Iron
- Super Alloys
- Titanium
SMSDistributors Expert Notes
The Norton Gemini R766 flap disc is a strong performer for shops needing a balance of cost and durability. The alternating zirconia alumina/aluminum oxide flaps provide better cutting action and longer life than aluminum oxide alone, making these discs ideal for mixed‑metal fabrication, weld cleanup, and general shop grinding.
With grit options from 36 through 120, the R766 series covers everything from aggressive grinding to final finishing.
About SMSDistributors
SMSDistributors.com is an authorized distributor of Norton Abrasives, supplying professional‑grade grinding, cutting, and finishing products for automotive, marine, metal fabrication, woodworking, and industrial applications.
Category: Flap Discs, Norton Gemini R766 Series