Makita Schleifböcke 250W 2850 U/min

Product Information

Know the maximum speed of the grinding wheel and the bench grinder - When purchasing new grinding wheels, make sure that the maximum speed of the wheel is not lower than the rotational speed of the bench grinder it is to run on otherwise spinning the wheel at too high a speed can cause it to disintegrate during use and presents a safety hazard. Assuming the reception of a relatively flawless machine, the Titan TTB521GRB is, for the most part, a relatively smooth running bench grinder. However, a common issue with the Titan bench grinder is the often heavier than expected vibration as the wheels gain speed at start up. Fortunately, the vibration usually subsides when the machine reaches its normal running speed. To help with the vibration, the machine has been endowed with rubber feet as well as well-positioned screw holes in its base for securing it to the workbench. The Clarke CBG6RP 6-inch bench grinder is another member of the budget category of bench grinders designed for the at-home DIYer. It is a generic type of machine that has been manufactured in the Far East and then badged with the Clarke logo and branding. It has a 150W motor which is one of the less powerful motors that one gets in the 6-inch bench grinder lineup and as such, like the other 150W bench grinders on the UK market, the Clarke machine is really only designed for light metal grinding of small hand tools such as chisels and the like. Grinding on the Clarke machine is carried out using the 20mm-width coarse and fine grinding wheels that come with it. However, for full sharpening of tools as well as blades, a yet finer grit wheel is recommended or a manual whetstone should be used after the initial dressing on the default Clarke grinding wheels. The Clarke bench grinder uses a standard 12.7mm bore size so replacement wheels should be easy to come by. Use the appropriate grindstone grits for the job at hand - Coarser grit wheels will remove material faster leaving less time for the tool or the wheel to heat up. Therefore, use harsher wheels when a lot of material needs to be removed. In contrast, finer wheels are used for removing smaller amounts of material, such as when finishing off a blade edge. However, if the blade is chipped or is overly dull and more material needs to be removed to reform a uniform blade edge, a coarser wheel may be needed initially. Like most heavy-duty grinders, the Dewalt DW758 8” only runs at a single speed. Even so, it does a great job of shaping tools, deburring, and removing rust spots.

GB602 – Welcome To Makita

Lower bench grinding speeds help keep heat build-up under control - If available, use a lower bench grinding speed to keep the heat build-up, on both the object being ground and the grinding wheel itself, under better control. As for build quality on the Titan machine, this can be variable from component to component. For example, the tool-rests on the Titan bench grinder are not of the best quality and can be deformed if enough pressure is applied. In addition, although they are adjustable in the horizontal ‘closer / further away’ dimension, they cannot be angled upwards making the consistent sharpening of tools, such as chisels and plane irons, more challenging. In other places, the build quality appears better, for example, when switching off the machine, the wheels take quite some time to come to a rest suggesting the use of decent spindle bearings. The Makita GB602 bench grinder is the Makita Corporation’s contribution to the 6-inch bench grinder tool category and as expected from the Japanese company, the GB602 is a precision tool with grinding wheels that show little vibration and a motor that makes relatively little noise. The motor power in the Makita bench grinder is 250W, powering the grinding wheels to 2850 rpm, and making the GB602 effective at medium level grinding of larger tool blades and power tool bits. It is, however, not the most powerful 6-inch bench grinder on the market, and unsurprisingly, pressing too hard on the grinding wheels can slow or even stop their rotation. Fortunately, the slowing or stopping of the wheel rotation only occurs when excessive pressure is applied and is not really relevant to normal grinding practice.Without a variable speed control, you will have to constantly turn the motor on and off to slow the wheel down. In addition to placing undue stress on the starter mechanism, this can get very annoying after a while. For most other applications, however, you will likely need to adjust the speed depending on the material you are grinding. In particular, you will want to set your grinder to slower speeds when sharpening chisels, to avoid overheating the metal. Larger bench grinders are useful for basic sharpening of chisel blades and the like and metal-polishing tasks, and you will save money in the long run because you won’t have to keep changing the wheels. Other than that, for commercial and industrial use, you will get a much better life span with a pro brand under daily use. And therefore you should consider if you want a slow or fast speed bench grinder.

Makita GB801 bench grinder 2 discs 3450 RPM 550 W GB801, 2

Fast speeds aren’t usually an issue for heavy-duty jobs for which you will probably want your grinder going at full bore the entire time. White wheels are better for DIYers - White-coloured wheel s (as opposed to grey or light blue ones) are gentler grinding wheels that make it easier to achieve a sharp edge on a tool, however, they tend to wear down faster than their darker brethren. For DIYers who tend to use bench grinders on more of an occasional basis, these types of wheels are therefore usually more appropriate. Dress the bench grinder periodically - Grindstone surfaces slowly wear down and often become clogged with metal filings during use. To rejuvenate the grinding surface, use a diamond-studded dressing tool to eliminate the metal filings and to expose fresh grit on the grindstone wheel surface. One way to be sure that you have dressed the wheel sufficiently is to draw a pencil line on the wheel and continue the dressing process until the pencil line disappears. Note, however, that the dust created from grindstone dressing is hazardous to your health so make sure to wear a dust mask! Essentially, once you have decided on the grinding wheel diameter to go for, usually either 6" (150mm) or 8" (200mm), it simply then becomes a matter of buying the highest-powered machine that you can afford, while keeping an eye out for the features that each offers. Those features include the ability to change out the wheels for different types of grinding wheels, wire wheels, or polishing mops, endowing the humble bench grinder with a whole range of capabilities. The Draper 29620 is a middle-of-the-range bench grinder with a 370W motor allowing it to handle some heavy duty grinding. In general, it is solidly built, the wheels are well-balanced, running smoothly with little vibration. The machine comes with 36 grit and 60 grit grinding wheels, which are a little too corase for delicate blades, but as with most other bench grinders the grinding wheels can be swapped out for other types of discs if need be. The unit weighs a hefty 12 kg so it is unlikely to move much but it can be bolted down to the workbench using only two holes in the base of the unit. Overall it is a good medium-level bench grinder, however, it is let down by the inclusion of less-than-adequate tool rests which can deform when grinding something substantial, and the fixings of the tool rests and various other components on the machine, are woefully below the standard of what is otherwise a good machine.

As for other types of activities that can be undertaken on the bench grinder, the Clarke CBG6RP machine is not powerful enough for regular polishing work but, at a stretch and if not too much pressure is applied on the wheel, can be used for some very light buffing when used with an appropriate polishing wheel. The Clarke CBG6RP 6-inch bench grinder is relatively heavy considering its motor size coming in at around 8kg which bodes well for greater stability on the bench top, but not so for moving it around a lot. In fact as with most bench grinders, the Clarke machine should be bolted down to the bench top for maximum safety and in this regard there are four screw holes moulded into the base of the machine designed to permanently fix it into place.