I have the same wheel and have a few comments...
Having bought various diamond wheels over the years I've noticed that they all cut like a mofo when they're new, but then their cutting aggression tends to taper off. Even my 360 grid diamond wheel did crazy shaping for the first couple hours. I don't think it's a glazing issue, I just think a freshly manufactured wheel has a break-in period. I remember when I first purchased my sintered wheel (about 3 years ago) I was giddy with how fast it shaped stones. But then, as you mention, it seemed to stop cutting. Further inspection revealed that it hadn't stopped cutting, rather it just wasn't cutting very fast. Also note that sintered wheels are actually a grit finer than advertised. For example, your 60-80 grit should actually be considered a 100 grit (or even 200 IMHO) once it's broken in. In summary, you can't set the expectation of a wheel based on initial cutting ability.
I feel your pain. I too was looking for a good shaping wheel that would last awhile, and the sintered variety seemed to make that claim. Once I accepted that my sintered wheel wasn't going to 'cut it' (pun intended) I continued my search.
I found the answer with a 60 grit Sachi Perfect diamond wheel (mine is an 8x2). Brand new it was too course and would shred a hard piece of petrified wood, essentially unusable. I dressed it with a hard piece of junk agate, probably eating through 2 or 3 pounds of the stuff before the wheel smoothed the knobs of diamond/metal left over from manufacturing. Once the wheel was properly dressed, it cut like a charm, and has continued to cut like a new wheel for the past 2 years that I've owned it.
My dream team consists of:
- 60 grit Sachi (shaping)
- 60-80 grit sintered (shaping, beveling, remove sachi scratches)
- 360 grit hard diamond (remove sintered scratches)
- 400 grit SC expando (wet) remove flat spots, scratches
I have all these mounted on an old HP combo unit, and I can complete the shaping of a dopped shape in 10-15 minutes if I'm in a hurry.
So, I guess my advice with your sintered acquisition is not to despair. Rather discover its capability and where it fits in with your process -- rest assured that the wheel will probably outlast you. I've found it's a great wheel for shaping preforms, as well as beveling the dome and finalizing the shape of the cab. It's probably my most used wheel, as it should be.
As for dressing the sintered, I've never done that, nor would I even know how to. I've read about services where you can send it for dressing but costs as much as a new wheel. I try to use the entire face of the wheel for even wear, and after 2.5 to 3 years of daily use, it's still as flush as the day it came in the mail. I've been curious if anyone has ever worn out a sintered wheel, and what that looks like. Maybe sweat shops in China manage to get through all those diamonds, but I can't imagine a hobbyist wearing out such a wheel in a single lifetime.
Hope this helps, I know those wheels have a killer price tag.
Diamond grinding tools are a crucial tool for any contractor or builder to have in the workshop or construction site. Only diamond tools are durable enough to handle hard materials such as masonry, marble, concrete, brick, and other types of stone. However, if you’re not familiar with these tools, choosing a diamond wheel can be a challenging task. Keep reading to discover seven tips for choosing the right diamond cup wheel for your project.
Before you set out to choose the right diamond cup wheel, you should understand what these tools are. If you’re unfamiliar with them, diamond cup wheels are a type of diamond-segmented tool with a concave shape to form a cup. These tools help contractors and builders grind abrasive materials such as masonry, concrete, granite, marble, and other types of stone. Diamond products are necessary for grinding such abrasive materials because they can withstand the hardness of the working material. Diamond wheels can even be useful in grinding and polishing gemstones and smaller, more delicate materials.
Now that you’re familiar with the diamond cup wheel as a tool, here are some tips that can help you proceed with the tool selection process.
The first thing to focus on when choosing a grinding wheel cup is not the cup itself but the material you’re going to grind. To successfully choose a diamond wheel, you need to examine the material you’re working with and consider the size and hardness of your working material. There are specialty diamond cup wheels that manufacturers create for use with certain stones. For example, concrete diamond cup wheels are ideal for handling concrete and masonry projects. They have the right grit and hardness to tackle working with tough concrete blocks. On the other hand, some stone materials are softer. One such material is marble, as it has unique grit and bond requirements.
When choosing diamond wheels, you should always pay attention to the bond used in the diamond segments. Using the wrong bond on the wrong type of material will cause your cup wheels to wear down faster than usual. The rule of thumb for choosing wheel bonds is to choose the opposite of your working material. For example, when grinding a hard stone, you should pair it with a cup wheel with a softer bond. On the other hand, when grinding a softer stone, you should choose a cup wheel with a softer segment bond.
The grit of your cup wheel refers to the amount of space between the openings in the abrasive coating. When grinding down material with a large surface area, it’s helpful to use a lower grit to help remove more material faster. Higher grits are ideal for polishing and detailing the surface of your working material. Once you’ve moved on to phase two of the grinding project, swap to a diamond cup wheel with a higher grit to polish and finish your working material.
Another factor to consider is whether you plan to use the selected cup wheel for wet or dry applications. Some grinding wheels have special considerations for dry versus wet grinding applications. For example, wet grinding can help cool the surface area of large materials, so you would want to find a wheel with a large diameter. Blades with smaller diameters are more effective for dry grinding applications. This is because they don’t generate as much heat from friction as larger-diameter wheels do. This is why wet applications are common for larger-diameter diamond wheels.
There are three main types of diamond wheel abrasives, including aluminum oxide, zirconia alumina, and ceramic aluminum oxide. Each abrasive can have different effects on the wheel’s factors, such as strength, hardness, impact resistance, and toughness. Aluminum oxide abrasives are some of the most popular diamond wheels for their use in steel alloys. Aluminum oxide and zirconia alumina have variants to form the best abrasive based on the application. Familiarizing yourself with these abrasives will help you better understand what to look for when choosing a cup wheel.
As mentioned, the diameter of the diamond cup wheel you’re working with can affect the amount of friction and heat that the grinding process generates. If you’re working with a larger surface area, it can be helpful to utilize a larger wheel cup, but make sure that you choose a model that is compatible with the wet grinding process. Alternatively, you may choose a cup wheel with a unique shape, such as a cone, cylinder, or square shape, to reach certain areas or to polish the edges of your material.
After factoring in the various aspects of your project, if you’re still having trouble deciding which wheel cup is right for you, don’t be afraid to voice your questions. There are many sources that you can go to for advice and help in choosing a diamond wheel. Try posting your application to an online forum through a trusted manufacturer’s site. You could also ask your local hardware store or anywhere else that supplies diamond tooling. Here at ProBlades Outlet, we’re happy to answer any customer questions and point you in the right direction of the tools you need.
Now that you know what to look for when choosing your diamond wheels, your next question might be where you can find them. You can shop for diamond grinding discs and a variety of diamond tools here at ProBlades Outlet. We offer a wide variety of diamond tools for any type of working materials. You can also contact our professionals with any questions or if you need additional help choosing the right diamond blade for your project.
With these seven tips for choosing a diamond cup wheel, you have everything you need to select the perfect diamond grinding tool for your project. If you need additional assistance choosing the right tool for the job, don’t forget to browse our site here at ProBlades Outlet for more information or contact our diamond tooling professionals today.