What is the difference between Type 27 and Type 29 discs?
The two main types of flap discs are Type 27 and Type 29. The differences between the Type 27 and Type 29 flap discs are in the angle. The type 27 disc has a flat face whereas the type 29 flap disc has a conical shape with flaps angled towards the edges. The difference is subtle, but important since they are designed for different uses.
What is the difference between T27 vs T29 flap disc?
T27 vs t29 flap disc is a concern,as professional Chinese manufacture for flap disc, we produce both flap wheels for T27 and T29 shapes. There are 2 shapes of flap wheel, one is T27 which is the depressed center and flat surface, the other one is T2 which is also depressing center but conical surface.
What are the different types of flap discs?
Flap discs are available in two shapes: conical or flat-shape. Conical flap disc: Conical flap discs are your best friends when you need to remove a lot of material in a small amount of time.
What is a type 27 grinding disc used for?
The Type 27 is a flat disc and is best used for finishing applications where the angle of use will be from 0 to 15 degrees. You can also do some mild grinding with the Type 27 disc at this low angle, but this is more of a finishing disc when most of the grinding has been completed.
What is a Type 27 angle grinder guard?
Explanation: Type 27 & 28 guards are open on the bottom to allow for side grinding with raised hub/depressed center wheels. When side grinding with the Type 27 or Type 28 wheel, the work piece acts as a portion of the guard, protecting the operator in the event of a wheel breakage.
What are the different types of flap discs?
There are three primary types: aluminum oxide, zirconia alumina and ceramic alumina. The flaps wear away as the grains deplete, which exposes fresh and sharp grains below. When used properly, a flap disc can essentially be used until the cloth is almost completely worn down to the resin.
What distinguishes a Type 27 Grinding Wheel?
Type 11 Wheel – A cup shaped wheel intended for grinding by the face of the wheel used with angle grinders fitted with the appropriate guard. Type 27 Wheel – A saucer/center depressed shaped wheel intended for grinding on the face of the wheel used with angle grinders fitted with the appropriate guard.
What is Type 27 depressed center?
Depressed Center Wheels Diameter Up to 6" These Type 27, Type 28 and Type 29 grinding and/or cut off wheels feature depressed centers, and may also be known as raised hub wheels. The flange/lock nut is recessed within the wheel. Aluminum Oxide abrasive is suitable for cutting and grinding ferrous metals.
How do I choose a flap disc?
Generally, standard-density flap discs are excellent choices for aggressive stock removal and demanding industrial applications. High-density flap discs, on the other hand, are best suited for curved or uneven surfaces, or for blending and finishing rather than heavy stock removal.
What kind of disc do you use to grind concrete?
The grit of the concrete grinding disc Lower numbers such as 9, 15, or 23 depict a disc with coarse grain. Coarser grains go with larger materials. You can also use coarse grains for rapid removal, where the finish is irrelevant. High numbers such as 75, 150, or 180 depict fine grit discs.
What is Type 27 cut-off wheel?
Type 27 Cut-Off and Grinding Wheels Cut-off wheels cut or notch these surfaces. Wheels are used with power tools and industrial machines such as angle grinders or bench grinders. Cup grinding wheels are used in applications such as smoothing welding seams and preparing surfaces for painting.
How do I know what grinding wheel I have?
The type of the wheel is marked as an ISO number and signifies the wheel's shape. For example, ISO Type 52 is a spindle-mounted wheel. The size of the grinding wheel is marked as dimensions in mm. For example, 230 x 3 x 22.2mm....The colours are:50m/s – Blue.60m/s – Yellow.80m/s – Red.100m/s – Green.125m/s – Blue/Yellow.
What are the different types of grinding wheels?
There are three main types of grinding wheels, where various numbers differentiate between wheels with specific properties and uses — type 1 snagging wheels, type 27 grinding wheels and type 28 grinding wheels.
What does Type 29 mean?
A Type 29 flap disc is referred to as a curved disc. It is best used at a 15-25 degree angle. The grinding surface of the curved flap disc, Type 29, has an upward curvature, allowing it to grind at a steeper angle. It is mainly used for grinding of corners and edges.
What is a Type 28 grinding wheel?
from 7.60. A HAT SHAPED GRINDING WHEEL designed to perform at a 10 to 15 degree angle, avoiding the operator fatigue one might experience when grinding with a Type 27. Delivers more abrasive grain to the work surface to ensure maximum material removal. A24R.
What is a flap discs for grinder?
A flap disc is an abrasive product designed for right-angle grinder applications that consists of overlapping abrasive “flaps” glued radially to a backing plate. Flap discs became popular for benefits like fast stock removal and the ability to perform grinding, blending, and finishing in one product.
What is a type 27 flap disc?
A Type 27 flap disc is referred to as a flat disc. It is best used at a 0-15 degree angle. Type 27 is used for grinding the plane and outside corners. In the bucket program we see lots of Type 27 discs used only on the edges so the recommendation is to switch to a Type 29 disc.
What angle is a Type 29 disc used for?
It is best used at a 15-25 degree angle. The grinding surface of the curved flap disc, Type 29, has an upward curvature, allowing it to grind at a steeper angle. It is mainly used for grinding of corners and edges. When speed and cutting ability have higher requirements always recommend the Type 29. What is the difference between ...
What is the drawback of a type 1 disc?
The number one drawback to this disc is the exposed mounting hardware that does not allow a flush cut but allows cutting all the way down to the mounting hardware. The Type 1 will give the maximum number of cuts and is usually the cheapest to buy.
What is the difference between a T27 and a T29 flap disc?
Most people use the T27 type of flap disc to polishing/finishing and blending. The grinding surface of the flat surface (T27) is smooth and is mainly used for grinding flat surfaces and external corners.
Which is better T27 or T29?
It is the best T27 and T29 flap disc. The ground surface of the curved flap disc (T29) has an upward curvature, which gives the T29 flap disc a better cutting ability on a flat surface. When working, the angle between the T29 grinding wheel and the grinding surface is 15 ° to 25 °. It is mainly used for contour and edge grinding.
Flap Discs: The Basics
The flap disc is a very special type of abrasive wheel that is used with both angle grinders and die grinders. These consist of a backing plate to which overlapping pieces of material with abrasives are attached. It kind of looks like overlapping pieces of sandpaper attached to a circular disk with a hole in the middle.
T27 vs. T29 Flap Disc: Which One Should You Use?
If you are working on a flat surface, blending surfaces, and smoothing out a finish, then a T27 is the way to go.
Summary
Now that you know what the differences between T27 and T29 flap discs are, you can make an informed choice between them.
What is a T29 flap disc?
The flap disc generally have two shapes, which includes curved and flat. The flat type is also called T27 type, and the curved type generally refers to T29 type. Flat (T27) has smooth grinding surface and is mainly used to grind the plane and the outside corners. The angle between the flat flap disc and the grinding work-piece during work can be grinded and polished at one time, reducing the work flow. The grinding surface of the curved flap disc (T29) has an upward curvature, which gives the T29 flap disc a better cutting ability in the plane. When working, the T29 grinding wheel has an angle of 15° to 25° with the grinding surface. It is mainly used for grinding of contours and edges. When the speed and cutting ability have higher requirements, the T29 type flap disc is undoubtedly the best choice.
What are flap discs used for?
Therefore, ceramic alumina flap discs are mainly used for the grinding of stainless steel, aluminum and other hard metals. Zirconia alumina itself is a poly crystalline crystal with fast cutting speed, self-sharpening, strong ability to withstand high pressure and high temperature. Therefore, zirconia alumina flap disc has strong cutting ability and long service life. Alumina: mono crystalline crystals, the cutting ability begins to decline at the beginning of grinding and the abrasive grain are not easily broken so that the alumina flap disc are suitable for the processing of common metals.
What is a Flap Disc for Angle Grinder?
A flap disc is an abrasive disc made of small sheets of overlapping sandpapers arranged in a circular shape. The layered overlapping segments or “flaps” have small grains of abrasives such as aluminum oxide. These abrasive grains are attached to a backing cloth which is normally made from polyester, cotton, or blended material.
Types of Flap Discs
Before you buy the discs, you should know about the different types of flap discs. The two main types of flap discs are Type 27 and Type 29.
How to Use a Flap Disc?
As I explained earlier you can use a single flap disc to remove material (grinding) and finish it (sanding) by varying the pressure applied on the workpiece. A flap disc is perhaps the only sanding device with which you can achieve higher grades of finish with lower grit wheels.
What is a flap disc?
Flap discs are made from multiple overlapping pieces of abrasives or ‘flaps,’ which is how they got their name. Flap discs are designed for right angle grinder applications ranging from heavy stock removal to surface blending and smooth finishing.
What is the difference between a conical and flat flap disc?
As a result, these discs offer a greater surface area for stock removal on horizontal surfaces. Flat flap disc: While conical discs are great for rapid stock removal, flat flap discs are best for blending and superior finishing. They are mostly used on flat surfaces.
What grit to use for flap discs?
In order to get the maximum benefits out of flap discs, it’s important to choose the right abrasive grit material for your specific job needs. Let’s look at the most commonly used abrasive grit types: Ceramic Alumina: This material is great for stainless steel or alloy metals application.
What is the best material for flap discs?
Flap Disc Material. The backing plate material is also an important variable to consider when choosing flap discs for your application. Fiberglass, plastic and metal are the most popular backing plate materials: Fiberglass: Being strong, durable, lightweight and safe, fiberglass is the most popular material choice.
What is a conical flap disc?
Conical flap disc: Conical flap discs are your best friends when you need to remove a lot of material in a small amount of time. They can be used for edge-working as well as on contoured applications. The flaps in a conical flap disc are angled.
Why use flap discs over grinding wheels?
When performing a job, many operators prefer flap discs over grinding wheels due to lower vibration and noise levels. Plus, they offer cooler cutting with minimal scratching. For instance, grinding wheels have to be discarded even after a small area of abrasive is worn out.
What type of discs do you need for concrete?
Flap discs for concrete: You’ll need silicon carbide or diamond flap discs for aggressive stock removal on concrete. Silicon carbide and diamond are some of the hardest materials in the world. Using these discs will allow you to work on concrete surfaces without the need for high pressure.
