What is the Advantage and Disadvantage of stone grinding tools

Just curious why it seems everyone is using belts nowadays, seems to me I remember seeing some knife makers using stone grinders, some still do but its a rarity.. I've only used one for sharpening once, and it moved metal super quick..

I can see the obvious advantage with a belt grinder, but is the stone grinder that bad?? or has the flat grind killed it?? Those stone grinders arent really made anymore. and a 10" or greater stone wheel for your bench grinder is very expensive. although I'd love to have a large cutlery water cooled stone they just arent practical. Murray Carter is the only guy i know of using them, and he has to have 3-4 different grit stones. I use a 8" bench grinder to profile with but thats about it.

Jason S. Carter I did the stone thing for a while. I had some of the best to use about 10" in diameter at no cost to me but rounded on the ou8tside edge.The word was "the harder the steel the softer the stone to be used should be". It was a way to do it but --- The stone wheel used in the past were often 3' 0r 4' in diameter and were turned by water wheels. The grinders often layed down to do their work. In time it could be done in a sort of smooth manner but with the motor drive not as even as I wanted and I went to a 4" X 36" belt grind to a 6"X 48" and now am at a 2" x 72" with a flat platen and one I most often run a 10" wheel on. The stone wheels were not a practical way for me to get the results I wanted. Frank I think one of the biggest issue is consistency. Stone wheels wear out, get dished, and ultimately your angles and diameters change. With a belt grinder/sander, you can just throw a new belt on and you're good to go.
Also, you have a seemingly infinite variety of grits and belt types to choose from, for relatively cheap, where as stone wheels can get quite expensive and not offer as many options.

Besides that, there's just so much more you can do with your after 2x72. Many years back ( 35 if I count right) I built a stone grinder. It had 2X12" wheels in coarse and fine and a set of vitrified 3X12 wheels. It was nice, but a belt grinder made it obsolete. It sits under a pile of gloves and supplies. I will still set it up in the new shop, and hopefully get some use from it.

In the new shop, one tool will be a hybrid belt grinder that has a 36", 200 RPM (max) VS wheel, and a 3X180" wet belt. It will be a sit on bench style wheel, like the old Sheffield ones. Radius platens work well, but are not suited to long grinding sessions or wet grinding. The wheel that Sam blew apart was an old grinding stone with a crack. He also powered it way too fast. They are made to run safely and efficiently at 100-200 RPM. The wheel I am building is a large contact wheel on a dedicated wet grinder, ands will run a long grinding belt. The belt will drive from 3.5X6" aluminum drive wheel.

When it comes to grinding engine flywheels, two common options are using a grinding stone or a CBN (Cubic Boron Nitride) grinding wheel. Each option has its advantages and disadvantages, catering to different needs and preferences. The Van Norman by Irontite Flywheel grinding machines give you the choice of using either of these grinding methods. Since the beginning of the stock FG and FG models come with a CBN Wheel as the standard setup due to its popularity among most flywheel grinding shops.

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Grinding Stone

A traditional grinding stone is commonly made from aluminum oxide or silicon carbide. These stones are less expensive compared to CBN grinding wheels, making them an economical choice for some users. They come in various grits, allowing users to select the appropriate coarseness for their specific grinding requirements. Grinding stones are known for their versatility and are suitable for a wide range of materials and applications. When using a Grinding Stone your machine will need to be equipped with the now optional wheel dresser assembly so you can open the pores of the stone between grinds and true up the grinding surface.

Pros of Using Grinding Stone

1. Cost-Effective: Grinding stones are generally more affordable than CBN grinding wheels, making them a preferred option for those on a budget or performing occasional flywheel grinding.

2. Versatility: The wide range of grit options allows users to adjust the grinding process according to the material and the level of precision required.

3. Available for Various Machines: Grinding stones are compatible with various flywheel grinding machines, including Irontites’ Van Norman Branded Flywheel Grinding Machines.

Cons of Using Grinding Stone

1. Lower Efficiency: Compared to CBN grinding wheels, grinding stones may have a lower material removal rate and might take more time to achieve the desired surface finish.

2. Wear and Tear: Grinding stones wear down over time and may need more frequent replacement, especially during heavy use. The need to remove material from the stone while dressing the wheel increases the frequency of stone replacement.

3. Significantly Dirtier: Grinding stones are significantly dirtier, requiring more frequent coolant changes as well as making a bigger mess in the shops from the abrasive in the grinding mist. Many Heavy Duty shops put the flywheel grinder in their parts departments and they really should only use CBN Wheels because of the mess generated from the grinding mist.

CBN Grinding Wheel

CBN grinding wheels are composed of Cubic Boron Nitride, a synthetic material known for its exceptional hardness and durability. CBN is very close to diamond in terms of hardness, making these wheels highly efficient for grinding hard materials like engine flywheels. CBN grinding wheels are often preferred for professional workshops and industrial applications. With fewer wheel changes and less time dressing the wheel, there is less wasted time between grinding jobs.

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Pros of Using CBN Grinding Wheel

1. High Efficiency: CBN grinding wheels offer faster material removal rates, reducing the grinding time significantly and increasing productivity.

2. Longevity: CBN wheels have a longer lifespan than traditional grinding stones, resulting in reduced replacement frequency, typically lasting 8 to 10 times longer than a grinding stone.

3. Superior Surface Finish: Due to their hardness, CBN grinding wheels produce smoother and more precise finishes on flywheels, especially flywheels that have developed “hot spots” where the metal hardness has increased due to the concentrated heat.

Cons of Using CBN Grinding Wheel

1. Higher Cost: CBN grinding wheels are more expensive than traditional grinding stones, which may be a deterrent for hobbyists or those with a limited budget.

2. Specific Applications: While highly efficient for grinding hard materials, CBN wheels might not be as versatile as grinding stones for softer materials or delicate tasks.

3. Heavy Duty Machine: CBN grinding wheels require additional downward force during the grinding process than a traditional stone would require. Some lighter duty grinding machines may struggle to produce enough force or it’s motor wear out more quickly when using CBN wheels on them.

In conclusion, the choice between using a grinding stone or a CBN grinding wheel for grinding engine flywheels depends on factors such as budget, grinding needs, and material hardness. Hobbyists or occasional users might find grinding stones more suitable due to their cost-effectiveness and versatility. On the other hand, professional workshops dealing with high volumes of hard materials could benefit from the efficiency and longevity of CBN grinding wheels.

For those interested in purchasing grinding stones or CBN grinding wheels for flywheel grinding needs, Irontite.com is a reliable source that offers both options, including compatibility with Irontites’ Van Norman Branded Flywheel Grinding Machines.

Web Search Results:

Contact us to discuss your requirements of stone grinding tools manufacturer. Our experienced sales team can help you identify the options that best suit your needs.

• CBN Grinding Wheels: Provides information about CBN grinding wheels, which are as close as you can come to having a diamond grinding stone. The page discusses their hardness and how it relates to their efficiency in grinding tasks.

• Choosing the Correct Flywheel Grinding Stone: Offers insights into selecting the right grinding stone based on the material to be ground. The correct choice of grinding stone ensures optimal results and performance.