The OMA Green 8 - Segment CNC Finger Bit, sized 20mm x 40mm, is a top - notch tool for working on granite, quartz, quartzite, marble, and engineered stone. It's a modified 8 - segment design, offering excellent performance. This bit is designed to operate at a speed of 14 - 25 feet per minute, with an RPM range of 5,500 - 8,000, depending on the type of stone. Its lifespan is outstanding, with even wear across all types of stone processed by the CNC. You can expect to make 100 - 130 sink cut - outs when running a mix of different stones under the specified conditions. Typically, it can last for 550 - 750 linear feet, and some bits can even exceed 1,000 linear feet, depending on RPM, feed rate, and materials. Here are the specific specifications: for quartzite, the feed rate is 12 - 16 feet per minute and RPM is 7,000 - 8,500; for quartz and granite, the feed rate is 15 - 24 feet per minute and RPM is 7,000 - 8,500. Made in Italy, with 8 double segments, it has a long life, minimal apple coring, and can run at high speeds. Priced at $99.00, it can cost as little as $0.76 per sink cut - out. It's one of the best CNC finger bits for granite, quartz, and quartzite stone.
Using the OMA Green 8 - Segment CNC Finger Bit is quite straightforward. First, check the type of stone you're working with. Then, set the feed rate and RPM according to the specifications provided in the product description. For example, if you're working on quartzite, set the feed rate between 12 - 16 feet per minute and RPM between 7,000 - 8,500. When using, make sure the stone is properly secured on the CNC machine to avoid any movement that could affect the cutting quality. As for maintenance, after each use, clean the bit to remove any stone debris. You can use a soft brush to gently clean it. Store the bit in a dry place to prevent rust. If you notice any abnormal wear or if the bit is not performing well, it might be time to replace it. Keep in mind that different feed rates and RPM can affect the bit's lifespan, so try to follow the recommended settings as closely as possible.
