How to Choose and Use a Bench Grinder
Love making sparks fly? So do we. If you’re here for romantic advice, you’re in the wrong place; if you’re here to quench your thirst for knowledge, read on.
Bench grinders are some of the handiest tools you can have at your disposal. From grinding to reshaping to sharpening, they’re workhorses when it comes to caring for and repairing metal implements of all kinds. Sharpening knives, chisels, lawnmower blades, axes, scissors, and more is a breeze with one of these helpful machines in your garage or shop. Here, your friends at WEN have put together some helpful pointers on how to choose and use a bench grinder.
Types of grinders
Grinders are usually broken down into two types: wet/dry sharpeners or grinders, and standard bench grinders and buffers.
Wet/dry sharpeners are usually used for sharpening tools that don’t need a lot of heavy corrective work. They incorporate an onboard water storage tank to cool a fine-grit abrasive stone, and many often include a leather stropping wheel for final honing and burr removal.
Wet/dry sharpeners are great for sharpening kitchen knives, woodworking chisels, scissors, and axes to a razor-sharp finish. They usually run at a slow speed and use a very fine-grit wheel, meaning they don’t take off much material at a time, but offer superior control.
Standard bench grinders, polishers, and buffers
These are the bench grinders you may have seen in your high school shop class, and are the type of grinders we’ll be focusing on for the rest of this article. They usually consist of a central motor housing, a sturdy cast-iron or cast-aluminum base, and grinding or buffing wheels on each side of the motor housing.
The WEN BG4282 bench grinder being used to sharpen a wood chisel.
Bench grinders usually incorporate a series of tool rests, as well as wheel guards and eye guards, to offer better control and help guard against sparks and flying debris. They usually come with aluminum-oxide or other abrasive grinding wheels, and are used for heavy material correction and removal. Usually, they include a low-grit (often 30. 40 grit) and a medium-grit (often 60. 80 grit) wheel. Replacement wheels and other accessories, such as wire wheels, are readily available.
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Buffers and polishers usually eschew guards and tool rests in favor of an open design, which offers excellent access to their woven-fabric wheels. These machines are great for finishing, buffing, and polishing metals, plastics, and some woods, and usually require their wheels to be charged with buffing compound before use.
How to choose a bench grinder
When choosing a bench grinder, make sure to take a few factors into consideration.
Bench grinders are usually measured by the diameter of their wheels. For example, a 6-inch bench grinder uses 6-inch-diameter wheels; an 8-inch bench grinder uses 8-inch-diameter wheels.
Generally speaking, 8-inch bench grinders are larger, heavier, and often both more expensive and more powerful than their 6-inch counterparts. They usually offer more working area and a stronger motor, and are best suited for heavy-duty or professional jobs.
6-inch grinders are versatile, compact, portable machines that are great for most general-purpose tasks around the house, but they may not hold up to the demands of a production environment. However, they’re usually less expensive than their 8-inch cousins, and take up very little room on your workbench.
Bench grinders’ motors are measured in amps. the amount of current they’re rated to handle in operation. Generally, more amperage equates to more power to handle heavy-duty grinding tasks.
Choose a bench grinder with an induction motor. they run cooler, quieter, and much longer than other motor types.
Most bench grinders run between 3450. 3600 RPM, but slow-speed models are also available. These units offer maximum precision and control, and because they run at a slower speed (usually around 1725. 1800 RPM), they tend to cause less heat buildup in the workpiece being sharpened. This helps with longer edge retention and longer life for cutting implements.
The WEN BG4286 3-amp 8-inch slow speed bench grinder runs at 1725 RPM, offering maximum control and minimum heat buildup.
Variable-speed models, such as the WEN BG4280 and BG625V, are also available. These models use electronic controls to precisely dial in the motor speed so that it’s perfectly tuned for the task at hand. However, this precision and versatility means that a variable-speed model will usually command a higher price than an equivalent single-speed model.
The WEN BG625V 6-inch variable-speed bench grinder is great for sharpening lawnmower blades, knives, chisels, scissors, and more.
Other features to keep an eye out for include:
- Adjustable eye guards and spark deflectors. As the grinding wheel wears down, adjustable spark deflectors and eye guards help you stay safe and get the most life out of your grinding wheels.
- Integrated drill bit guides built into the tool rests, or available as separate attachments. These make sharpening drill bits much easier than trying to freehand it.
- Angle-adjustable tool rests. Different tools require different cutting angles; adjustable tool rests make this much easier.
- Onboard worklights. These help you see what you’re doing even when hunched over the grinder.
- Onboard quenching trays. As alluded to above, when grinding, heat buildup is the enemy. These trays hold water or oil to help keep your workpiece cool.
- Cast-iron bases and mounting holes. At the very least, your grinder should be bolted to its mounting surface to prevent it from wandering around, but a heavy cast-iron base will help further stabilize it and reduce vibration.
How to use a bench grinder
Always make sure to read your owner’s manual completely and follow its instructions. Below are some general tips.
- Take proper safety precautions. Wear personal protective equipment. ANSI Z87.1-approved safety glasses, ear protection, respiratory protection, etc. Do not wear gloves, ties, jewelry, or loose clothing, and make sure to tie back long hair. Keep other people and animals away from the grinder.
- Stand to the side of the tool. It helps prevent the sparks created (and there will be plenty!) from landing on your clothes.
- Bolt the bench grinder down securely, whether to a workbench or bench grinder stand.
- Use pliers or clamps to hold small workpieces.
- Choose the correct grinding wheel for your application. Coarse (low-grit) grinding wheels will remove material faster but cause more heat buildup and leave a lower-quality finish. Fine (high-grit) wheels will remove material more slowly, but leave a better edge. Wire wheels are great for removing buildup, smoothing welds, deburring, and removing rust.
- After turning the bench grinder on, let it reach full speed before trying to sharpen anything.
- Keep control of your workpiece. Hold it securely against the grinding wheel, letting the tool do the work. Move the workpiece slowly back and forth to keep an even grind.
- Only grind on the face of the grinding wheel. Never grind on the side of the wheel.
- Keep the workpiece cool. If you don’t have a quenching tray, or the workpiece is too big to fit in a quenching tray, give it a break from time to time.
One other tip. if you’re sharpening an existing edge, consider marking it with a permanent marker. That way, while keeping a consistent angle, you can see which parts have already been ground and which have not. marked sections will need more attention.
Thanks for reading! We hope this has been a helpful guide on your journey to choosing a bench grinder. If you have any questions about WEN bench grinders or wet/dry sharpeners, or need help deciding which one is right for you, please give us a call at 1-847-429-9263 (M – F, 8 – 5 CST), or drop us a message here to talk to our friendly and knowledgeable technical support team.
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Bench grinder is a bench type of electric grinding machine. Bench grinder usually has two grinding wheels and tool rests, used in grinding, polishing, milling and sharpening for tools, drill bits, metal parts, stone, chisels, etc. Compared with pedestal grinder, bench grinder has a small size and more portable, can be placed on table.
Like hand-held grinder (such as angle grinder and die grinder), bench grinder is standard equipment in metalworking and machining workshops.
Main Structure of Bench Grinder
Grinding is usually done on the tool rest. During operation, grinding wheel may instantly grab the workpiece and pull it out of operator’s hand or pull hand to the wheel. Tool rest can avoid this sudden slippage and make the grinding operation more stable.
According to the bonding and grade of grinding wheel, it can be used for sharpening cutting tools, such as cutter bits, drill bits, chisels, etc. In addition, it can be used in rough machining for metal before welding or assembly.
Buffing wheel for bench grinder is used to sharpen blades and buffing wood piece after waxing.
The wire wheel or buffing wheel can be interchanged with the grinding wheel to clean or polish workpiece. To a certain extent, some buffing machines (buffers) have the same concepts and functions as bench grinders. The difference is that the former has a longer shell and uses a buffing wheel instead of a grinding wheel.
Features of Bench Grinder
Grinding wheels have different performances for grinding and sharpening of different materials. They can also be used at a specific speed or variable speed. For example, straight wheels can be used on any type of surface and can sharpen chisels or other tools. Conical wheels are more suitable for more delicate projects, disc wheels are suitable for sharpening saw blades. If it requires a large grinding capacity, diamond grinding wheels are more ideal.
When you buy a bench grinder, the grinding wheel size is one of the most important factors. Usually, a 6 inch bench grinder is sufficient for most DIY tasks, but these grinding machines may have lower power. For example, if you need to grind workpiece in industrial/commercial use, select a bench grinder with a wheel size of 8 inch or 10 inch.
Tips for Using a Bench Grinder
No matter what bench grinding machine, as the grit gradually peels off, grinding surface will be worn, and fine chips may block the grinding wheel. For this, it is necessary to regularly use a dresser or other tools to dress the grinding surface so that grinding wheel can obtain a fresh edge. When dressing, first adjust the tool rest to make it forms a 90° angle with the grinding wheel. Then place the dresser flat on wheel stand, making the working end parallel to wheel surface. Move the dresser along the grinding wheel to make grinding surface smooth.
Bench grinder needs to check all parts regularly to ensure that they are functioning properly. If it is founds that the grinding wheel is chipped, cracked or shaken, it should be replaced. Otherwise, there will be great security risks. Stop the bench grinder, unplug the power plug, and then remove the protective guard to replace grinding wheel.
We provide best bench grinder for sale, competitive price. Grinding wheel diameter 5 inch/6 inch/8 inch/10 inch and 12 inch for selection. Heavy duty bench grinder is available. You can use bench grinder with belt sander or polisher in industrial/commercial/home/woodworking applications.
Purchase the Best-Selling and Best Bench Grinders Online with Great Offers
A bench grinder is referred to as a grinding machine that is designed as a benchtop power tool. These types of grinding machines are used in various industrial applications. over, it can be fixed on the ground or can also be mounted on a pedestal. It is used for tasks like sharpening the tools used for cutting such as gouges, chisels, etc. In addition, before the process of welding, this machine is also used to shape the metals in a rough manner. Bench grinder machine belongs to a huge family of power tools, and these power tools are very useful for industrial or commercial operations. We, at Moglix, offer high-end, economical, as well as durable bench grinder machines from various top brands such as Stanley, Bosch, and various other well-known brands at the same time.
Different Types of Top-Notch Bench Grinders Online to Choose From
Automotive Bench Grinder: The automotive bench grinder machines are majorly used for different types of metal equipment and a complete range of various other types of tools used for cutting or other purposes at the same time. over, this type of bench grinder machine is very popular and demanded in multiple industrial as well as commercial applications.
Woodworking Bench Grinder: The woodworking bench grinder machine comes in use for the purpose of sharpening the hand tools used in various types of industries as well as in levelling the cutting edges. over, it is also used for the purpose of grinding or sanding the wood at the same time.
Portable Bench Grinder: These portable bench grinder machines are light in weight as well as easy to use and move from one place to another effortlessly. over, these bench grinders are smaller in size compared to a proper full-size bench grinder machine. In addition, you can get these types of bench grinders online at Moglix.
Important Tips Before Buying Bench Grinder Machines Online
Power Consumption: You should always check the power consumption of the bench grinder while buying or planning to buy it. over, these bench grinders are available in different models from different brands which provide a huge range in this category along with dissimilar power consumption options online at Moglix.
Brand: A good brand, mostly makes you satisfied and happy once you buy a product from them as they provide good quality products to their customers and that too with warranties, differently depending upon the types and models available. Therefore, you should always go for a good brand, especially when it comes to buying a commercial power tool such as a bench grinder.
Warranty: Warranty is one of the most essential factors one should look up to when purchasing or planning to buy an electronic or power tool online or offline at the same time. over, the brands that are well-known as well as popular, provide good warranties with their products. In addition, a warranty helps in getting the problem fixed by the brand without any costs, until and unless the warranty period is over.
Top Brands to Shop for Bench Grinder Machines Online
Stanley Bench Grinders : Stanley is a brand that was started in the year 1843 and then this brand started working hard to make its name popular and place the company at one of the top positions in the field of power tools industries. This brand has various offerings when it comes to the category of power tools such as bench grinders, wood grinders, etc. over, you can buy products from this brand online at Moglix with great offers and deals.
Bosch Bench Grinders : Bosch is a brand that is known for its quality products and after-sales services. Bosch has a huge number of products from different categories for customers to buy. You can get these top-notch and best-selling products from Bosch easily online at Moglix’s website along with great offers and deals.
KPT Bench Grinders : KPT offers quality as well as affordability at the same time. This brand is one of the top-selling brands online at Moglix, in the category of power tools. over, you can get a huge product line up of different types of power tools from this brand, such as bench grinder machines, wood cutting machines, etc.
DIY Engineers Bench Grinders : DIY Engineers is one of the top-rated and best-selling brands in the category of power tools online at Moglix. It offers products such as bench grinders and many other power tools at the same time. over, you can trust this brand for its quality and services as it has a huge number of trusted and reliable dealers as well as distributors throughout the nation.
We offer a huge number of other top and known brands at the same time, in the category of bench grinders, such as Hanbon, Krost, Mastech, and so many other brands as well.
Moglix Offers the Best-in-Class and High-Quality Bench Grinders Online at Minimal Prices
Stop searching for a perfect bench grinder machine here and there, because Moglix is here for you offering all the top-notch brands and high-quality products to you at your doorstep. In addition, Moglix is one of the best e-commerce websites in India and has a lot to offer when it comes to the power tools category, such as bench grinder machines, wood cutting machines, and many other power tools used in various industrial as well as commercial applications. over, you also get great discounts on bulk orders while ordering online with Moglix.
Top Selling Bench Grinders Price List in India
|Ingco 150W Aluminium Bench Grinder, BG61502||₹2,399||40% off|
|Ingco 350W Aluminium Bench Grinder, BG83502||₹4,499||42% off|
|Bosch 600W Professional Bench Grinder, GBG 60-20||₹14,757||35% off|
|Bosch 350W Bench Grinder, GBG 35-15||₹9,634||32% off|
|Makita GB801 550W 20.5 kg Bench Grinder||₹16,199||22% off|
|Wokin 150W Heavy Duty Aluminum Bench Grinder, 789006||₹2,931||15% off|
|Makita 8 Inch Bench Grinder, GB801, 550W||₹16,199||22% off|
|Hanbon 141003 150W Green Professional Bench Grinder||₹4,354||57% off|
|Hanbon 141004 200W Green Professional Bench Grinder||₹5,261||57% off|
|DCA ASE150 250W 2840rpm Bench Grinder||₹5,719||30% off|
A bench grinder is probably not a tool you’ll use every day. However, if it’s available and set up correctly, you’ll be surprised how often it comes in handy for everything from sharpening tools to rounding over thread ends on a cutoff bolt. We’ve assembled these tips to help you get the most out of your grinder.
Keep a Container of Water Handy
Most chisels and other cutting tools are made of tempered steel. If the steel gets too hot and turns bluish black, it’s overheated and won’t hold an edge very long. To avoid ruining the edge of a tool by overheating, keep water nearby to cool the tool. A good technique is to move the tool once across the bench grinder for no more than a few seconds. Then dip it in the water. If the steel edge does overheat and turns color, grind the edge back to good steel and start over.
Grind Small Objects Safely
Hold small objects with locking pliers. This keeps your fingers a safe distance from the grinding wheel and protects them against burns from the hot metal. It also gives you better control over the grinding process.
Make Tool Sharpening Guides
Here’s a better way to hold tools securely while you’re grinding them—and take the guesswork out of creating the right bevel angle. It’s a short piece of 2×4 with an angled end and a 1-1/4-in. hole for a clamp. I made one for sharpening chisels and plane blades, and a few more with different angles for wood-turning tools. Large labels with the tool’s name tell you which blocks are for which tools. For a Delta grinder with a 6-in.-diameter wheel, a 5-1/2-in.-long piece of 2×4 aligns the tool to the wheel just right. For other bench grinders, you may need to adjust this length. Note: The angle you cut on the block is not the same as the tool’s bevel angle. But let’s skip the math. To determine the block angle, turn off the grinder and hold the tool’s bevel flush against the wheel. The angle of the tool shaft to the workbench is the angle to cut on the 2×4. Our thanks to Ray Caputo for this sharp accessory.
How to Make a Bench Grinder at Home
Consider a Low-Speed Grinder for Sharpening
Unless they’re variable speed, most bench grinders run at about 3,450 rpm. If you’re careful and keep the wheel dressed (more on that in another tip), these high-speed grinders work fine. But for sharpening garden and other tools, a low-speed grinder running at 1,750 rpm is a better choice. The lower speed reduces the chance you’ll overheat the edge of your tool. Another advantage of a low-speed grinder (100 to 150) is that this type typically includes friable white grinder wheels, which do a better job of sharpening than the gray grinder wheels usually included with high-speed grinders. See how to use an angle grinder.
Dress Wheels Frequently
Wheel dressing squares the face of the wheel, but more important, it exposes new grit for more efficient cutting. As a wheel is used, the spaces between the cutting grit can become clogged, and the grit itself dulled. A wheel in this condition can cause overheating and slows material removal. A wheel dresser like the one shown here (15 to 30) has a bar with diamond grit impregnated in it. Holding the bar against the spinning wheel cuts away the surface to expose new grit, squares the face of the wheel and rounds the wheel. To use a dressing tool like this, start the bench grinder and wait for it to reach full speed. Then press the diamond wheel dresser against the spinning wheel, holding it perpendicular to the face of the wheel. Be sure to wear a good-quality dust mask. The fine aluminum oxide dust is very bad for your lungs. Draw a pencil line on the wheel before you start to help you gauge when you’ve removed enough material from the wheel. Dress the wheel just until the pencil line disappears.
Watch for the Sparks to Come Over the Top
When you’re sharpening a chisel or other tool, you can tell when the edge is getting sharp by watching the sparks. When the edge is blunt, the sparks are deflected downward. But as the edge gets sharper, the sparks roll over the tool and cascade down the surface facing you. When you see this start to happen, be careful about grinding much more because a thin edge is very vulnerable to overheating.
Make an Angle Gauge
Chisels and other cutting tools work best if their edges are ground at the correct angle. You can search online to find the optimal angle for whatever tool you’re sharpening. Most wood chisels should be ground to about a 25-degree angle with a secondary micro-bevel angle of 30 degrees on the tip of the blade. An angle gauge allows you to set the tool rest at the desired angle. You can make an angle gauge from a thin piece of cardboard using an inexpensive protractor. 1. MARK THE ANGLE ON CARDBOARD Align the center mark on the protractor with the top edge of the cardboard. Then turn the protractor until the desired angle is also aligned with the top edge. Draw a line along the protractor to mark the angle. Don’t forget to label the angle. Cut along the line to create the gauge. 2. ADJUST THE TOOL REST Set the cardboard on the tool rest and adjust the angle of the tool rest until the wheel contacts the center of the angled portion of the cardboard gauge.
Upgrade the Tool Rest
Inexpensive bench grinders have tool rests that are finicky and difficult to adjust. If you do a lot of tool sharpening or simply want a bench grinder tool rest that’s easier to adjust, consider adding a stand-alone tool rest. There are several variations, some made for specific tasks like sharpening lathe turning tools. This Veritas model has two adjustments for positioning and aligning the tool rest, and levers for easy tightening. You can also buy an attachment that holds chisels or plane irons.
Make Your Grinder Portable
Even the most nicely organized home workshops don’t have enough bench space to devote a section to a bench grinder. A good solution is to mount your grinder to a board or small stand so you can clamp it to the bench when you need it, and store on the shelf when you don’t. The compartment on this grinder stand is a good spot to keep your dressing tool and safety glasses so they’re handy when you need them. For a fancier version, build a little drawer to fit the space under the grinder. The stand is built from two 12 x 16-in. pieces of 3/4-in. plywood separated by two 4 x 12-in. uprights. We used two 5/16-in. bolts with washers and nuts to attach the grinder, leaving enough space in front of the grinder to mount a stand-alone tool rest.
Easy-to-Clamp Mobile Base
Shazam! Fasten your bench-top tools to your workbench in seconds. Bolt 3/4-in. plywood bases on the tools and then glue and screw a wood strip along the front edge to fit into a woodworking vise. Crank this strip into a vise to lock the tool into place. If you don’t have a vise, drill a couple of clearance holes along the face of the wood strip on the base and drive screws through the strip into the edge of your workbench. Then just unscrew to remove the tool.
Set Up a Polishing Station
A bench grinder fitted with a wire wheel on one side and a cotton buffing wheel on the other side, or buffing wheels on both sides, makes a great cleaning and polishing tool. You’ll also need a set of polishing compound sticks (14). Polishing compound sticks are color coded to indicate the grit, from coarse to very fine. To use the polishing wheel, hold the stick against the buffing wheel as it spins to transfer some polishing compound to the wheel. Then hold the object lightly against the wheel and let the compound polish the surface.
Sharpen Your Lawn Mower Blade
Sharpening your lawn mower blade is easy with a bench grinder. Grind the tapered cutting edges with a grinder only if you see nicks in the blade. Follow the factory angle of the cutting edge. The grinder will remove nicks in the blade much faster than you can file them.
Not All Grinding Wheels are the Same
You can use two kinds of aluminum-oxide wheels to sharpen your chisels; one is blue-gray and the other white. We used the darker-color wheel, which is harder and will keep its shape longer. The drawback, however, is that it grinds hotter than the softer, white wheel. Too much heat will weaken the steel. The soft wheel will need more frequent shaping with a dressing tool, but you’ll be less likely to burn the edge of your chisel while grinding. For best results, use a 100-grit wheel to shape your chisel blades.
Know When to Replace a Wheel
Slide the wheel over your finger and tap the wheel in four places with a screwdriver handle. All taps should sound the same. If they don’t, scrap the wheel. It’s cracked.