Home | Products | Coating Products | Flap Disc | 4-1/2″ Flap Disc

4-1/2″ Flap Disc

Luckut flap discs are engineered for aggressive stock removal, blending, deburring, and surface finishing in one step. Made with premium abrasive cloth and strong backing plates, they deliver long life and cool cutting. Available in multiple grain types such as Zirconia (ZA), Ceramic Alumina (CA), and Calcined Aluminum Oxide (AO) to suit various metal grinding applications, including stainless steel, mild steel, and non-ferrous materials.

Size of Disc

|

115*16mm

Dimensions

|

20*21*72

Grit Range

|

40# to 120#

Abrasive Grains

|

Zirconia, Ceramic, Calcined Aluminum Oxide

Get a Quote

Send email

Product Type

T27

T29

Application Method

Angle Grinder / Bench Grinder

Product Forms

Portable Hand Engine

Product Overview

Product Advantages

High-Performance Abrasive Cloth

Uses premium zirconia, ceramic, or calcined AO abrasive flaps, offering self-sharpening action, cooler cutting, and longer service life.

Versatile Grinding & Finishing

Combines aggressive material removal with smooth surface finishing—ideal for one-step blending and polishing tasks.

Strong, Durable Backing

Equipped with fiberglass, plastic, or metal backing plates, the discs stay strong and stable at high speeds, ensuring operator safety and consistency.

Material-Specific Options

Zirconia: Best for stainless steel and carbon steel under heavy pressure

Ceramic: Ideal for hard alloys and extended life applications

Calcined AO: Great for general-purpose light to medium grinding

OEM/Private Label Customization

Support for custom logo printing, grit selection, flap count, and backing colors, helping distributors establish a unique brand presence.

Wide Compatibility

Fits all standard angle grinders. Grit sizes from 40# to 120# cover rough grinding to fine finishing, meeting the needs of fabricators and metalworkers.

Product Parameters

Size Parameters	Cutting Disc Thickness	Flap Disc Thickness	Sharpness	Durability
(3″)75	1.2/1.6	6	★★★★★	★★★★
(4.5″)115*22	1.0/1.2/1.6	6	★★★★★	★★★★★
(5″)125*22	1.0/1.2/1.6/2.3	6	★★★★★	★★★★★
(6″)150*22	1.2/1.6/2.3	6	★★★★★	★★★★★
(7″)180*22	1.6/2.3	6	★★★★	★★★★★
(9″)230*22	2.5/3	6	★★★★	★★★★★
(14″)355*25.4	2.5/3	6	★★★★★	★★★★★
(16″)405*32	3/3.4	6	★★★★	★★★★★

Product Application

Metal Fabrication & Welding

Remove welds, smooth seams, and clean spatter in one operation.

Automotive Repair & Body Shops

Grind, blend, and finish panels or structural parts before coating.

Construction & Steel Structure Plants

Surface prep and finishing of beams, frames, and panels.

Shipbuilding & Heavy Industry

Smooth welds and remove rust or scale from large steel components.

FAQ

What’s the difference between T27 and T29 flap discs?

T27 is flat and best for surface grinding; T29 is angled for edges and contours.

Which grain should I choose?

Zirconia: For stainless/carbon steel and aggressive grinding
Ceramic: For hard alloys and extended durability
Calcined AO: For general-purpose grinding and value markets

Can flap discs replace grinding wheels?

Yes, for many light to medium grinding jobs, flap discs offer better control and a smoother finish in a single step.

Do you offer OEM or private label services?

Yes, we offer custom printing, packaging, flap count, grit options, and backing color for OEM customers worldwide.

Are these discs safe for high-speed grinders?

All flap discs are reinforced and tested to meet ISO9001 safety standards and designed for angle grinders at up to 13,300 RPM (depending on size).

GET IN TOUCH WITH US

Thank you for your interest in pm-papertech! Please fill out the form below and provide as much detail as possible, so we can better assist you.

CONTACT US

Thank you for your interest in pm-papertech! Please fill out the form below and provide as much detail as possible, so we can better assist you.

No. 12, Diamond 5th Road, New Material Industrial Park, Zhengzhou City, Henan Province.

8618239982393

[email protected]

RELATED APPLICATION

Here are our best-selling products. If you want to learn more, you can contact us

Casting

Only when the perfect balance is struck among the grinding wheel, the material, size, structure, strength of the casting, and the cutting machine can the ultimate performance be achieved. Due to our focus in this field, we also consider ourselves experts in cutting and grinding for the heavy industry and casting industry.

Learn More

Railway Engineering

In railway construction, maintenance and repair projects, we offer high-performance and cost-effective cutting and grinding solutions. We provide high-precision, perpendicular, sharp, safe and stable grinding wheel products that are compatible with the power, rotation speed of chain saws and electric saws, as well as the operating scenarios.

Learn More

Energy & Pipelines

Our products are specifically designed for applications such as grinding, polishing, cutting and beveling of stainless steel and alloy steel pipes and plates used in petrochemical, nuclear power and municipal engineering projects. They are sharp, stable, easy to use and safe.

Learn More

RELATED PRODUCTS

6″ Cutting Disc

It is suitable for ferrous metals, Unalloyed or low alloy steels, All kinds of rebar, Box profiles, Solid iron, Ç1040-1050 Steel flats, Steel construction, Welded manufacturing and Weld seam splitting operations. The product, which has aluminum oxide abrasive grains and a hard structure, has the advantage of long life and fast cutting.

16″ Cutting Disc

It is suitable for ferrous metals, Unalloyed or low alloy steels, All kinds of rebar, Box profiles, Solid iron, Ç1040-1050 Steel flats, Steel construction, Welded manufacturing and Weld seam splitting operations. The product, which has aluminum oxide abrasive grains and a hard structure, has the advantage of long life and fast cutting.

7″ Cutting Disc

It is suitable for ferrous metals, Unalloyed or low alloy steels, All kinds of rebar, Box profiles, Solid iron, Ç1040-1050 Steel flats, Steel construction, Welded manufacturing and Weld seam splitting operations. The product, which has aluminum oxide abrasive grains and a hard structure, has the advantage of long life and fast cutting.

4-1/2″ Grinding Wheel

It is suitable for ferrous metals, Unalloyed or low alloy steels, All kinds of rebar, Box profiles, Solid iron, Ç1040-1050 Steel flats, Steel construction, Welded manufacturing and Weld seam splitting operations. The product, which has aluminum oxide abrasive grains and a hard structure, has the advantage of long life and fast cutting.