This disc shape results in a tough edge and high performance. This is simply not true. Larger flaps are suitable for high-volume, aggressive grinding applications, thanks to their expansive grinding surface. However, there are specialized flap discs for aluminum that are made to avoid these challenges. In the case of a flat sanding sheet, you may have to replace it when a portion of the sanding surface is damaged. The size of the abrasive grain determines the quality of finish. Read on as we explain how to use a flap disc. Some are sharpeners and cutters, while others are polishers and smoothers. Big throws are coming and the warmer spring weather is coming. This is an important step because the selection of abrasive material and grit size will determine the effectiveness of the finishing or grinding you intend to do on the metal. While they are often confused due to some overlapping characteristics, the two different abrasive products are not the same. For additional information on this topic or if you need any other abrasive safety information, please review the Norton Product Safety page, ANSI, OSHA, and all literature provided by the coated abrasive and machine manufacturer. Be sure that you are placing the flap disc at the proper angle when grinding or finishing. Smaller grit sizes indicate coarse grit, while larger ones indicate finer grit. Products containing silica have been used for thousands of years in building. The difference is subtle, but important since they are designed for different uses. Flap disc can work on wood as well as on metal. This also means that you spend less money to get the same result if you were to purchase a grinding and finishing disc. You should strongly consider a flap disc over a grinding wheel if you need a superior finish and greater ease of use during operation. Flaps wear from their outer ends and the sheet carrier cuts back as the abrasive coating is worn away. Grit size is the final variable you have to choose based on your ultimate goal and what youre trying to achieve. National Abrasives, Inc. has a large variety of tools, accessories and supplies to meet your immediate needs and your needs in the future. Since you can grind and finish the weld with the sample flap disc, it saves you a lot of time. Do rotate stock. The type 27 disc has a flat face whereas the type 29 flap disc has a conical shape with flaps angled towards the edges. Learn how to visually inspect and speed check your grinding machines to ensure safe grinding wheel usage. Grinding wheels are great for general sharpening tasks, such as restoring edges on worn-down shovels and garden tools or performing an initial grinding on lawn mower blades, shears, hatches, and axes. Coated abrasive flap wheels are utilized for a wide range of jobs, from grinding to polishing. For instance, grinding wheels have to be discarded even after a small area of abrasive is worn out. You can use a flap disc with an angle grinder to clean old paint, rust, and other materials without damaging the surface underneath. Portable flapwheels were made by bonding radial flaps of abrasive into a hub fitted with a spindle shank. The wheel remains useful even as the flaps erode. Keep reading our flap disc buying guide to learn more about these tools and how to select the right flap disc for your project. Do use a flap wheel at its appropriate angle and recommended working surfaces. We carry a variety of styles and options to fit every application. Great for bevel and prep, a slightly worn down one is incredible for deburring edges and corners. We are often asked the questions, "When is a grinding wheel worn out?" Please read my disclaimer for additional details. What other essential wheels are liked? This makes them even more flexible, thus more suited for producing a smooth finish to curved surfaces. Tip #1: Get comfortable with the discus. Coated abrasive flap discs are mainly utilized in metal fabrication, machining, agriculture, welding, and food industries. AngleGrinder101.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to amazon(.com, .co.uk, .ca etc) and any other website that may be affiliated with Amazon Service LLC Associates Program. Winner Walter Technologies 15W454 FlexSteel Flap Disc Price Est./ Our Rating: $$$ / 4.8/5 Read Our Quick Review View Price 2. Flap discs are also used to remove paint, rust, and corrosion from metal surfaces. A flap disc is a lighter fixture than a grinding wheel. 1. The size of a flap disc is measured by its diameter. Discs with smaller diameters rotate faster, making them suitable for fast, smooth grinding in tight spaces. For aggressive grinding, you need to apply much pressure, whereas fine finishing requires low pressure. Flap disk recycle hack - how to trim and making it last longer or prolong its life. They can be used for finishing metals by quickly removing burrs and producing a smooth finish on the edges. The Type 29 has a beveled edge and is better for high angle grinding, which is normally between 15 and 25 degrees. This article will provide necessary information on this particular disc type, including its uses, guide to choose a disc, and how to use it safely and efficiently. Angle Grinder Flap Disc: How To Choose & How To Use It? [3] These were intended for use with electric drills and were limited to a maximum speed of around 1,000rpm. The most common options are, Cooler operation, minimizing the risk of scorch or heat marks, Reduced vibration and fatigue for a more comfortable experience, Safety is improved because there are no pieces that break or fly off. Speak With An Abrasive Specialist, , we are a leading and trusted provider of specialty abrasive products, including, Drum Sander Replacement Conveyor Feed Belts, Surface Conditioning (Non Woven Polishing), Types Of Belt Sanders: How To Choose The Right One, What Is Sandpaper Made Of & How Is It Made. The flexibility of a flapwheel is an advantage for smoothing curved work and avoids the production of facets, as was a problem for rigid disks. Do wear personal safety gear when working with power tools like angle grinders. Do NOT use expired discs. These files do not contain any sensitive information. WARNING: Never remove a worn cup wheel from its proper grinder and use it on an inline grinder or any other machine. The material removal rate could be more than what you expect and could create holes in thin sheets. You may contact the Saint-Gobain Product Safety Department at (508) 795-2317, fax: (508) 795-5120, or contact your Saint-Gobain Abrasives representative with any safety related questions. These disc types work at different angles and provide various performance features. Grit sizes of 24-60 are used for grinding and heavy stock removal, while 80-120 are used for jobs like blending and finishing. As an Amazon Associate I earn from qualifying purchases. Due to their conical shape, Type 29 flap wheels are often used on aggressive stock removal or reaching irregular shapes. Do store abrasive flap wheels in their container box at a humidity of 40-50% and a temperature of 60-80oF (15-29oC). The differences between the Type 27 and Type 29 flap discs are in the angle. You should generally begin with a coarser grit size to remove stock and shape your workpiece, then use the finer grit size in the finishing step (like blending and repairs). Tip #5: Have your athletes toss the discus up in the air a few feet and catch it. Because of these advantages, the popularity of flap discs has soared in the last several years. For example, a DeWalt Type 27 flap disc should be used only at an angle of 0-15 degrees. In order to get the maximum benefits out of flap discs, its important to choose the right abrasive grit material for your specific job needs. Different types of grinding wheels are available, and each type serves a different purpose. Your choice here will be based on the type of work you want to do with the disc. are designed with dense overlapping abrasive material called flaps, these flaps not only shape any metal but also provide good finishing. Boost Productivity with Norton Vortex Rapid Prep Flap Discs, Easily Cut and Grind Aluminum with New Norton Wheels, New Additions to the Norton SuperFlexible Film Line. During grinding the highest point of the flaps touch the workpiece. This week was the first week of outdoor track practice here in New England and other parts of the United States and typically when all the discus questions start to be emailed to me! Mud flaps protect your car in several ways. 2023 Red Label Abrasives. Always carefully examine the flap disc for damage or defects, and destroy and discard if damaged. Grinding and cutting discs have expiration dates. Benefits: Lightweight design reduces operator fatigue | East to use - very little surface pressure required | Cool cutting permits light contouring and prevents burning | Longer life: Withstands wear up to 10 to 15 times longer than conventional fibre discs due to overlapping flap construction | Aggressive removal of metal. Unlike the simpler flat disks, made from a circular flat sheet of a coated abrasive, a flapwheel is made of multiple overlapping small pieces or 'flaps', bonded to a central hub. Also Read: Flap Disc vs Sanding Disc On one side, there are coated abrasive grains (the same grains used in bonded abrasive cutting/grinding discs) to grind or shape surfaces during material fabrication or when bending or polishing a weld. This not only reduces swirl marks but also prevents repetitive damage to the surface, which is common with flat sanders such as palm sander. Never attach the flap disc when your angle grinder is plugged in. (508) 795-2317 or Fax. If you want to complete the work faster, it is better to stick to a proper angle and use a coarser grit flap disc which will take away more material. Before storing the machine or transporting it to another location, always remove the disc and store it as recommended. June 27, 2023 Browse our large selection of brand-name flap discs, including Walter Abrasives flap discs, along with angle and bench grinder tools and accessories. While the first abrasive flap discs forhigh-speed angle grinders were developed towards the end of the 1970s and were somewhat basic, todays versions offer an array of diversity. Grinding wheels can play an important role in your project, particularly during material removal, but when youre working with metal and need a tool that can achieve results during each stage of the project, flap discs may be your best and most efficient option. WARNING: Always use proper mounting procedures when using this type of product. A flapwheel and the related flap disk is an abrasive disk, used for metal finishing. This process continuous and enables you to grind without losing the quality of cutting and also extends the life of the disc. More specifically brand new throwers (or throwers who haven't picked up the discus in 9 months) emailing me after their first few days of practice complaining that the discus is not releasing out of their hand the right way. Norton has been delivering abrasive solutions to our customers for 130 years and counting. Although not as aggressive as a grinding wheel, the flap disc can remove a lot of material than one would imagine. If you are a woodworker or hobbyist who occasionally delves into grinding or finishing materials, then you might consider a cheaper version such as aluminum oxide. If you have any questions, our team can guide you to the right tool for your specific job. The flap disc and flap wheel have a cooling tendency so grinding produces less heat. It's not going to fly far the first week of practice. Too little pressure is placed on the flap disc and it will take longer for it to achieve the desired results. Do little kids first learning how to throw a football correctly with a spiral try throwing 50 yard Hail Mary passes to their dads in the backyard? For common grinding, use abrasives with lower grit numbers. The Necessary Ingredients to Make a Great Thrower, 2017 Elite Fitness & Coaching, LLC. Type 27 flap discs should be used at 0-15 angle and Type 29 flap discs should be used at 15-25 angle to the workpiece. It also gets them used to the feel of having the discus "stick" to their hand as they pull it back and move it forward. A flap disc offers a similar metal removal rate as standard cutting wheels, but they might have a slow cut rate and wear out quickly. Week 5 - Thrower Preseason Strength Training Made Easy! For aggressive grinding, you need to apply much pressure, whereas fine finishing requires low pressure. You should also use a T29 conical disc at a 15-degree angle for general grinding purposes or a T27 flat disc for cleaning the surface or making a smooth finish with light and even pressure. FYI THESE ARE ALL VERY COMMON PROBLEMS WITH NEW DISCUS THROWERS! Flap wheels are used for different metalworking applications including fabrication, deburring, cleaning, polishing, and finishing. Each flap on the disc touches the workpiece surface at a different angle. This paper presents the brake pad wear prediction of a disc brake assembly. Maybe youve been usinggrinding wheels all this time and have overlooked the benefits of a flap disc. We are often asked the questions, "When is a grinding wheel worn out?" The answer depends on the grinding wheel and the application. Aluminum oxide is the cheapest of the three. These products are commonly used on portable electric and pneumatic angle grinders instead of grinding wheels and coated abrasive discs. The two main types of flap discs are Type 27 and Type 29. Bosch and Miele are two entirely different tiers, Great article, clear on the steps to replace the damaged drywall. These flaps are glued onto a backing plate made of plastic or fiberglass. This is where the flap disc gets its name. That means you can use a 40grit disc and with delicate touches, you can achieve the finish of 60-grade sandpaper. See the disclosure page for more details. It also teaches finger placement, the force against their fingers, and how to spin the discus. As you continue to do the machining, the abrasive grains here will get depleted and the fresh abrasives of the flap behind them will be exposed. Do match the discs size with your angle grinder or sander. Dont create a hazard. The more delicate the job is, the higher you should go with your grit size. When performing a job, many operators prefer flap discs over grinding wheels due to lower vibration and noise levels. They are basically shrapnel grenades on an unknown length fuse. Flap discs are versatile: they can grind, blend and finish. A flapwheel and the related flap disk is an abrasive disk, used for metal finishing. If you have a lot of discus throwers and only one throwing circle, the athletes waiting around the cage for their turn can all do this instead of just standing there talking. Remember, conical shaped flap discs are great for stock removal and flat flap discs are best for finishing. 2017 Elite Fitness & Coaching, LLC. https://en.wikipedia.org/w/index.php?title=Flapwheel&oldid=1092665091, Creative Commons Attribution-ShareAlike License 4.0. Tip #2: Stop trying to throw too far too soon. Do contact your abrasive manufacturer if you have any safety questions. Flap wheels are available in different grits, diameters, and sizes. Ability to change the pressure as required to provide a coarser or smoother finish. Dont use loose clothing or accessories that can get stuck onto the moving disc of your angle grinder. Place the lower adapting nut with the raised center facing away from the grinder; Install the flap disc with its arbor hole centered over the raised flange and the abrasive flap disc facing away from the grinder; Thread the top of the adapting nut onto the spindle. Apart from concrete, these discs can also be used on stone, marble, granite, and ceramic. There are several other benefits of using flap disc and flap wheels: Sign up to get the latest on sales, new releases and more . However the timing couldn't be more perfect for the blog post today. For those absolutely stupid things that you see people bring, roll, or. - July 22, 2013 6 Flap discs are one of the most versatile grinder accessories in metal working. Reddit, Inc. 2023. This improves productivity. Weld Blending Grinding Deburring Deflashing Stock Removal Surface Finishing Edge Chamfering Saber Tooth Tip #3: Get everyone out of the circles and start doing release drills. 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. I know I would rather TEACH good habits rather than CORRECT bad habits! What Flap Discs are Best for Aluminum Grinding? There are 3 main types of flap discs flat discs, conical discs, and compressed-shaped discs. Then place its raised center facing away from the grinder with the same direction as the lower adapting nut; Locate, then press and hold the spindle lock. Inspect flap discs for any signs of damage prior to using. Flap discs are made from multiple overlapping pieces of abrasives or flaps, which is how they got their name. Don't Choke at the Big Meets! This teaches them to release the discus off the first finger with some spin. removing stock on hard materials like concrete. For more information, please see our We care to deliver right choices that matter to your market and application We use cookies in order to improve site performance, offer you a better browsing experience and enable you to easily share content. Tip #4: Get your athletes to bowl the discus back and forth to each . Because of this increased popularity, it is good to have a refresher on flap disc safety, focusing on the three areas where most problems may arise. If possible, store your flap disc in its original container. Thank, This article offers valuable insights for those seeking professional assistance in dealing, Good article! This is perhaps one of the most common uses of these discs. They can be used for finishing metals by quickly removing burrs and producing a smooth finish on the edges. They do some of the same jobs as grinding wheels, which you may be more familiar with. They offer exceptional versatility, maneuverability and lower vibration and noise levels than grinding wheels. Dont limit flap disc to the common metals. Do unplug the angle grinder from its power supply (electricity/battery) before. However, if you need to remove a lot of stock it is better to start with a coarse grain disc. Flap discs are designed for right angle grinder applications ranging from heavy stock removal to surface blending and smooth finishing. Get into a big open area and simply pull the discus back nice and flat and release it 10 feet in front of you. It is better for more delicate tasks, such as finishing and blending. Learn how to visually inspect and speed check your grinding machines to ensure safe grinding wheel usage. Overall, flap discs are quite handy and useful in finishing metal and grinding metal, wood, and other hard materials. For Types 5 & 7 recessed wheels factors such as wheel grit size, application and experience will provide the user with the best answer. , but they might have a slow cut rate and wear out quickly. Dont use a flap disc if you have not reviewed all of the safety materials and have not been properly trained in the use of the tool and flap disc. If you are a professional who will use the flap discs regularly, then you probably want to invest in the more expensive versions. The result is a disc that is more versatile compared to the standard aluminum oxide, but it is more heat-resistant, durable, and has self-sharpening grains so that it does not wear out nearly as quickly. That video is below! Remember, each variable can impact the amount of disc area available to work on your job. ANSI B7.7 Safety Requirements for Abrading Materials with Coated Abrasive Systems very clearly states that If the machine is designed and equipped with guards, it shall not be operated without the guards properly installed and in place.Flap discs are designed for use on angle grinders, which come equipped with guards. They provide reliable grinding action, while also allowing for more delicate blending and finishing work. Most flap discs on the market have a width of 25mm, while some large-scaled ones have a width of 30mm. For grinding, apply heavy pressure and for finishing, apply light pressure. This webpage contains affiliate links to products and services. But if you are a professional or are doing long-term work, then investing in a ceramic alumina flap disc is probably the best choice. Since flap discs don't gouge the workpiece as fast as grinding wheels do, a less-skilled operator can use them more efficiently without damaging the work piece, Questions? If so, be sure to check out the other articles on our website. When the disc is returned to you, it'll be ever closer to being broken in. Besides, you should follow safety cautions and remember to use the wheel that is properly matched with your angle grinder to ensure its performance and safety. Reddit inc. required us to consult the users on how to move the community forward, they overwhelmingly voted to have the sub close. For flattening wood, I strongly recommend you use a belt sander or a drum sander. What grit for removing mill scale? WARNING: Maintain a safe distance to prevent accidental contact with the back of the cup or the mounting flange during grinding. Learn about their proper use and see how you can make them a part of your preventative safety plan. It made short work of the light loose rust, but would Portable cup wheels must be discarded when the machines guard prevents proper grinding. The flap disc, specifically 3m cubitrons, are incredibly good at removing lots of material fast. This cloth is divided into smaller strips and placed overlapped to add more stability and support to the disc. It was outside, but in SW Arizona, that just means it has developed a small amount of protective rust over the mill scale. 6K votes, 403 comments. Zirconia alumina is a blend of the other two. Flap discs, also known colloquially as flapper wheels, have a design suited for right-angle grinder applications. Do store abrasive flap discs at the recommended 40-50% relative humidity and 60-80 F (15 to 29 C). Are you exploring flap discs to use for your next project? Norton has been delivering abrasive solutions to our customers for 130 years and counting. Flap discs with higher density last longer, but a normal density disc wear out with aggressive grinding. When you are finishing the material, you can switch to a finer grit to complete the job. You can also select the size of the flap discs which range from two to seven inches in diameter. Cartilage has several functions in the human body: Reduces friction and acts as a cushion between joints and helps support our. Tip #2: Stop trying to throw too far too soon. For example, a DeWalt Type 27 flap disc should be used only at an angle of 0-15 degrees. Flap discs are primarily used for metalworking for grinding, blending, clean up welds, chamfering, etc. For example, a 115mm wheel should be used with a 4.5-inch angle grinder. Flap wheels are also one of the most useful tools for metal fabrication. Did you find this article useful? Do you have to remove stock aggressively, or is smooth finishing your goal? A higher the grit number means finer abrasive grains and hence smoother finish. So, what is an angle grinder flap disc, and how can you choose a disc that is appropriate for your work? A flap disc is an abrasive product used to contour and shape metal. In the metal fabrication industry, flap discs and flap wheels are utilized for cleaning, shaping, deburring, polishing, and finishing jobs. *This post may have affiliate links, which means I may receive commissions if you choose to purchase through links I provide (at no extra cost to you). If you grind at an angle too steep, it may use up the edge of the disc rather quickly and cause it to wear out at an accelerated rate. When it comes to purchasing flap discs, you have plenty of options. Save my name, email, and website in this browser for the next time I comment. You may also contact the Saint-Gobain Product Safety Department at Tel. When used properly, a flap disc can essentially be used until the cloth is almost completely worn down to the back plate. Week 1 and 2 - Thrower Preseason Strength Training Made Easy! On April 30 2007 GOING, GOING, GONE! For example, a 20 grit flap disc can be used for rust removal on old steel furniture but is not efficient when working on fine polishing. Flap discs are the recommended choice when youre working with metal, especially when you intend to make right angle cuts. They do some of the same jobs as grinding wheels, which you may be more familiar with. Tip #6: Developing trust with the discus. Week 10 - Intensify the Gains - Thrower Preseason Training, Week 9 - My Quads Are On Fire - Thrower Preseason Training, Week 8 - Let's Talk About Your 2 Rep Max - Thrower Preseason Training, Weeks 6 and 7 - Your two hardest weeks so far - Thrower Preseason Training. What grit for finishing? When I'm blending welds I'll start with one of those to remove bulk material, then switch to the regular backer and sanding disc to clean things up . : r/Justrolledintotheshop. However, there are some important differences. You can cut hard materials like stainless steel, titanium, and cobalt with some type of flap wheels (like a Dark-Fire one). This will allow the flap disc to take off the paint while not digging into the surface too much. There are different kinds of flap disc. These abrasive grains are attached to a backing cloth which is normally made from polyester, cotton, or blended material. a 60 grit flap disc will usually leave a finish similar to an 80 grit fibre disc) - saving you time and finishing steps! The extra lifetime this gave to the disk allowed their use for stock removal and metal shaping, not just finishing and polishing. This area depends on the quantity of flaps on a disc, their angle relative to the center of the disc and how far they are spaced. Flap discs with higher density last longer, but a normal density disc wear out with aggressive grinding. Although theyve long been used with high-speed angle grinders, advances in both design and materials have brought flap discs to the point where they can carry out grinding, blending, and finishing jobs much more quickly and with less noise than grinding wheels- layered flaps constantly expose new grain and act as a cushion, resulting in less noise and vibration. Or do you want a grind thats somewhere in between? The main advantage is that it grinds with less effort compared to all other types. The cloth is cut into smaller sections or flaps and layered across the disc. The DIY industry continues to grow in America, with experts estimating that it is now worth $74 billion. Advertisement. Yesterday I found myself cleaning up a bit of square tube in preparation for welding and later paint. This might not happen until the second week of practice but THAT IS OK! Most athletes who did shot put during the winter season will pick this up very quickly as the shot and discus power position are almost identical. In addition to these three areas, it is important to follow the basic dos and donts for flap discs to ensure they are used properly and safely. Dont exceed the maximum RPM marked on the flap disc. This step is self-explanatory. It always pays to use the right tools for the job. Do not fit worn out discs on a smaller machine. This is a major cause of wheel/segment breakage.
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when is a flap disc worn out
