General description The Dormer B901 12.00MM S/S Machine Reamer is designed for opening and finishing existing holes to H7 tolerance in various ferrous and non-ferrous metals. This high-speed steel (HSS) reamer features a left-hand spiral flute geometry, ensuring an excellent surface finish. It is manufactured to the BS328 standard, making it a reliable choice for precision machining tasks. Technical specifications Reamer Diameter: 12mm Overall Length: 152mm Flute Length: 76mm Number of Flutes: 6 Material: Cobalt High Speed Steel Cutting Direction: Right Hand Flute Type: Left Hand Spiral Length Type: Standard Length Reamer Type: Fixed Series: B901 Shank Type: Straight Finish/Coating: Steam Tempered Standards Met: BS 328 Usage To achieve optimal results when using the Dormer B901 reamer, it is crucial to prepare the holes correctly. Ensure that there is sufficient stock left in the hole before reaming; too little stock can cause the reamer to rub and wear quickly, leading to a loss of