ECCENTRIC BACK SPOTFACING COUNTERBORE with decimal progression for back spotfacing

BACK SPOTFACING Back spotfacing is a calibrated facing process performed around a hole. This is a “pulling” machining, so the spindle of the machine moves away from the piece during the work phase. The resulting surface is generally used as a flat contact surface for a washer. The orthogonality of the counterbore with the hole guarantees maximum tightness of the screw pressing the washer. Back spotfacing cannot be always performed with the same strategy. In fact, it is necessary to choose the most suitable tool according to the ratio between the diameter of the hole and its length. For holes...

Why choose us? We don’t sell products, we sell solutions. THE ECCENTRIC BACK SPOTFACING COUNTERBORE For this type of tools Blade Tools has developed a catalog of special products obtained from semi-finished products ready in stock. The semi-finisched products are made with a special material that is thermical pretreated. This allows you to request a special eccentric back spotfacing counterbore, specific for your counterbore, with reduced delivery times: only one week. WHISTLE NOTCH SHANK This tool mounts a different insert depending on the diameter of the counterboring to be obtained. The inserts...

Blade Tools eccentric back spotfacing couterbore

Blade Tools eccentric back spotfacing couterbore * The øA shown in the table is the measurement range of the semi-finished product from which the special tool is obtained. To identify your spotfacing counterbore, first check the ø of the spotfacing you need to make. At this point look in the table for the corresponding range and you will find the maximum sizes that the special tool can have. For example: you need to perform a ø27.5 spotfacing. The semi-finished product from which we will start is the BMRE-C range 26.1-28. The counterbore can enter a hole no smaller than 15.5mm (the overall dimensions...

Blade Tools eccentric back spotfacing couterbore On request we can perform eccentric counterbore with Weldon connection, Varilock, ISO DIN 2080, ISO DIN 69871, MAS BT, PSC, HSK. These are specials with delivery times of 4-5 weeks from order and price to project. The diameter of the counterbore is in fact influenced by the radius of the insert. The Blade Tools program is designed to use only the ISO inserts indicated in the table. On request it is possible to add the internal refrigeration hole directed on the sharp. There is a surcharge on the price that depends on the type of counterbore selected....

Blade Tools eccentric back spotfacing couterbore 4. Can I use the eccentric back spotefacing counterbore to perform spotfacing with higher depth at 3xD? NO When the counterboring depth is deeper than 3xD, the eccentric counterbore is not very strong and increases the probability of breakage during processing. In these cases it is necessary to use an interchangeable blades counterbore from the Blade Tools program. 5. I have to make chamfers in pull, can I use an eccentric back spotfacing counterbore? YES It is possible to make special chamfering tool to perform the machining of chamfers in pull....