What is the difference between a 4 1/2&#; Angle Grinder & 5&#; Angle Grinder?

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Our Metal Fabrication Supplies 5&#; Angle Grinder & Cutting Disc Combination promises to save you time, increase production and make your operator safer.

 

What are 4 1/2&#; Angle Grinders used for?

The most common small angle grinder purchased in the UK is the 4 1/2&#; Angle Grinder. 4 1/2&#; Angle Grinders are suitable for light duty tasks, or when access could be a problem. Due to the smaller size a 4 1/2&#; Angle Grinder will never be as productive as a 5&#; Angle Grinder. 4 1/2&#; Angle Grinders are also more compact which makes them easier to grip and manoeuvre for some applications. 4 1/2&#; grinders are purchased more often because they appear to have a lower initial cost when compared to a 5&#; Angle Grinder. However, when it comes to cost against performance, the 4 1/2&#; Angle Grinder may not prove to be the best value product when compared against the 5&#; Angle Grinder.

Below is a specification comparison between a Metabo 4 1/2&#; Angle Grinder and Metabo 5&#; Angle Grinder. The only benefit that the 4 1/2&#; Angle Grinder seems to offer is its light weight.

Measurement Metric 4 1/2&#; Angle Grinder 5&#; Angle Grinder Grinding Wheel ø 115mm 125mm &#; 8.6% greater depth of cut Rated Input Power 900W W &#; 39% more input Output Power 550W 780W &#; 41% more output No-load Speed 10,500rpm 11,000rpm &#; 4.7% faster Revolutions at Rated Load rpm rpm &#; 6.6% faster Torque 2.5Nm 3.4Nm &#; 36% greater Weight 2.1kg 2.4kg &#; 12.7% heavier

In a comparison test, we used a Metabo 4 1/2&#;&#; Angle Grinder against a Metabo 5&#; Angle Grinder with the same bond Speedgrit 1.6mm cutting discs. We carried out two cutting comparisons on 8mm x 150mm carbon steel plate. We recorded the number of cuts and average time taken per cut to establish what would be the difference in performance.

Measurement Metric 4 1/2&#; Angle Grinder 5&#; Angle Grinder In house cutting test results cutting 150mm x 8mm mild steel flat and 1.6mm discs 3 cuts 6 cuts &#; 100% greater consumable life Average time per cut 67secs 55 secs &#; 21.8% faster cutting speed

&#; Time saved = 17.91%

&#; Increased production = 21.81%

The number of cuts achieved with the 5&#; Angle Grinder were 100% greater than the 4 1/2&#; Angle Grinder. The 41% output power and 36% torque provided by the 5&#; Angle grinder, meant that the disc speed remained at its optimum, allowing the disc to work more efficiently. The number of cuts were doubled from only an 8.6% increase disc diameter.

The extra output power and torque provided by the 5&#; Angle Grinder ensures the optimum periphery speed of the disc is maintained, this helped to reduce the average time taken per cut by 17.91%.

How much money would I save using a 5&#; Angle Grinder?

The average UK labour rate for a Fabricator is £10.25 per hour. This means the 5&#; Angle Grinders could save a possible £1.83 per every hour used. Maintaining the optimum cutting speed also helped to achieve a 21.81% increase in product (based on an average charge out rate of £25 per hour), the 5&#; Angle Grinders would deliver an extra £5.45 profit per every hour used.

In most industrial applications the larger and more powerful 5&#; Angle Grinders will quickly give a return on the extra investment made when purchasing. They could save you money, help you make money and in the case of our Metabo grinders and Speedgrit discs, they are designed to be much safer.

Will all 5&#; Angle Grinders and disc combinations give the same performance and safety?

To deliver a high performance, Metabo angle grinders are fitted with several features.

• New patent-pending Marathan Motors which deliver up to 50% more torque, 20% more output power and 20% more overload protection compared to most other brands.
• The S-Automatic Torque Limiting Clutch ensures no kickback arises should a disc jam or snag unexpectedly. This allows for immediate continuation of work afterwards.
• Auto-Balance ensures up to 50% less hand-arm vibration in surface grinding and stock removal applications. This allows for longer trigger times without the need for further action, it also contributes to doubling the working life when used with grinding discs.
• Side handle Vibratech handle vibration damping for convenient continuous operation.
• M-Quick System for tool-free disc change at the touch of a button by means of M-Quick flange nut.
• Restart protection prevents unintentional start-up after power supply interruption.
• Electronic soft-start for smooth start-up.

Our Maxitek Speedgrit range of cutting discs are manufactured and tested based on the European safety standards and the oSa trademark clearly signals to the user the high-quality manufacture and high stands of the safety testing.

The video below shows the difference between our Metabo and Speedgrit Combination compared to our competitor&#;s combinations. Look and see the results for yourself&#;

 

Satisfaction guaranteed&#; Or your money back!

 

If this combination fails to outperform your current combination in terms of performance or safety, we will credit you in full and you can keep the Angle Grinder and Speedgrit Cutting Discs.

 

Click below to buy the MFS combination&#;

The Number Of Angle Grinder Uses Make It A Must-Have Power Tool

When you think of the must-have power tools your should own, what comes to mind? A drill, an impact driver, and a circular saw usually make everyone&#;s list. But what about an angle grinder? Understanding what an angle grinder is used opens your mind to just how useful these tools are. So what is an angle grinder used for? Let&#;s jump right in!

If you want to learn more, please visit our website Hengxuan Abrasive.

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What Is An Angle Grinder?

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Before we dive into what an angle grinder is used for, it&#;s very helpful to take a brief look at the tool&#;s design. An angle grinder holds a variety of different accessories, usually called wheels, but sometimes called discs or blades. It spins at thousands of RPMs.

A 5-inch angle grinder might hit 9,000 to 12,000 RPMs. A 9-inch might run at 6,500 RPM. The RPMs tend to drop as the size increases because as the wheel diameter increases, it doesn&#;t need to spin as fast to keep the wheel&#;s edge speed the same.

Angle grinders use abrasive wheels, diamond wheels, metal brush cups, flap discs, and a wide range of other wheel types to accomplish their tasks. Take a look here to scroll through some of the options.

What Is An Angle Grinder Used For?

Cutting Metal

Using an abrasive or diamond wheel, cutting metal is one of the common uses for an angle grinder. It can be a less-expensive alternative to a plasma cutter for fabricators. Masons can use them to cut off rebar. Commercial contractors might use an angle grinder to cut metal studs. Pros in the oil/gas and plumbing industries use them to cut metal pipes.

Around the house and garage, it&#;s great for cutting off frozen bolts, trimming down threaded rods, and cutting metal to shape for a variety of weekend projects.

Because of their thinner nature, abrasive cut-off wheels have a higher risk of coming apart, so be sure you&#;re always using the guard and safety glasses. You might want a thick apron as another layer of protection for your chest.

Grinding/Polishing Metal

When you use an angle grinder for grinding and polishing metal, there are several wheels you might use. Some remove material aggressively and help you remove bumps or grind down welds so they&#;re flush to the connection. Other wheels remove material less aggressively and can even out the look or bring the metal back to a beautiful smooth shine. Then there are polishing wheels you can use to add a polishing compound to give the metal its best finish.

If you want to spend more time smoothing and polishing, look for an angle grinder with adjustable speeds. You&#;re less likely to damage your workpiece at slower RPMs, and grinders don&#;t have variable speed triggers.

One of the most common ways to use an angle grinder around the house is to sharpen your lawn mower blades, axes, and hatchets. It&#;s arguably easier with a bench grinder, but plenty of people use angle grinders effectively. It&#;s a rough process and you&#;ll want to follow up with a sharpening stone to get the best edge.

Cleaning Metal

If you have a metal with paint or rust that needs to come off, it&#;s another great use for an angle grinder. A wire brush cup or wheel can knock both off without digging into the metal the way a grinding wheel would. A plastic/nylon stripping disc works slower but is less likely to damage the material underneath, so it&#;s a good choice for removing paint and lacquer.

Be careful when you&#;re using an angle grinder for cleaning, though. Paint and rust can come off in small enough bits for you to breathe them in, so be sure you&#;re using a mask in addition to your safety glasses and hearing protection.

Cutting Masonry, Stone, and Tile

Metal isn&#;t the only material you use an angle grinder for. With a steady hand, it&#;s an effective alternative to tile saws or cut-off saws for small-scope work with tile, masonry, and stone. Similar to metal cutting, you&#;re most likely going to use an abrasive or diamond wheel for cutting these materials. Be sure to check the package, though. There are different wheels for cutting metal and masonry.

This is another application that you want to pay close attention to your PPE on. Cutting these materials throws up dust you can breathe in that&#;s not at all good for your lungs. There are special grinder accessories that let you attach a vacuum to pull in the dust. At the very least, a mask is a no-brainer.

Clearing Grout/Mortar

Similar to cutting masonry materials, you can also use an angle grinder to clear grout or mortar. Because these materials are usually in a thick line, you use a thicker grinder wheel to clear them in fewer passes.

Clearing grout and mortar introduces airborne dust, so stick to the same accessories and PPE as you do with cutting masonry products. If you&#;re working in an enclosed space, such as a shower, you might be better off with an oscillating multi-tool to remove grout.

Like the cordless angle grinder in our photos? It&#;s from HART Tools and you can read more about it here!

If you want to learn more, please visit our website 5 inch angle grinder wheels.