Aluminummillingspeedchart

Back taper – A slight taper resulting in the shank end of the cutting diameter being smaller than the cutting end. This condition aids not only the plunging or drilling condition but also tends to compensate for deflection.

Chamfer – A short relieved flat installed where the periphery and face of a cutter meet. It is used to strengthen the otherwise weak corner.

Surface speed for aluminumpdf

Helix Angle – The angle formed by a line tangent to the helix and a plane through the axis of the cutter or the cutting edge angle which a helical cutting edge makes with a plane containing the axis of a cylindrical cutter.

Tangential rake angle – The angle made by a line tangent to a hooked tooth at the cutting edge & a radius passing through the same point in a plane normal to the axis.

Cuttingspeed for aluminumwith carbide

Chip loads are provided as ranges. In order to extend the life of your tool, use the lower value in the range. If need to get your job done quickly then you can a higher chipload within the specified range.

Chip Splitters – Notches in the circumference of a corn-cob style Endmill cutter resulting in narrow chips. Suitable for rough machining.

Surface speed for aluminumsteel

Gash (Notch) – The secondary cuts on a tool to provide chip space at corners and ends. The space forming the end cutting edge, which is used when feeding axially.

Concave – Small hollow required on the end face of an Endmill. This feature is produced by a dish angle produced on the cutter.

Helical – A cutting edge or flute which progresses uniformly around a cylindrical surface in an axial direction. The normal helical direction is a right direction spiral.

Angular Edge – The cutting edge that is a straight line and forms an angle with the cutter axis. The cut that an Angular edge tool produces will not be as flat as a helical cutting edge.

Lathe cuttingspeedchart PDF

Surface speed for aluminumtable

Core Diameter – The diameter of a cylinder (or cone shape with tapered Endmills) tangent to the flutes at the deepest point.

Cuttingspeedformula

Flute – Space between cutting teeth providing chip space and regrinding capabilities.  The number of cutting edges.  Sometimes referred to as “teeth” or “gullet”.  The number on an end mill will determine the feed rate.

Feed Rate = Spindle Speed (RPM) * Number of Flutes * Chip Load (inches) = Spindle Speed * Number of flutes * Chip Load = Answer inches/min

Use a plunge rate of 50% or less of the feed rate. So for a feed rate of ... ft/min, use a plunge rate of ... ft/min or less.

Rake – The angular relationship between the tooth face or a tangent to the tooth face at a given point and a reference plane or line.  An angular feature ground onto the surface of an end mill.

Hook – A term used to refer to a concave condition of a tooth face. This term implies a curved surface rather than a straight surface.  Hook must be measured at the cutting edge, making measurement difficult.

Cutting Edge – The leading edge of the cutter tooth.  The intersection of two finely finished surfaces, generally of an included angle of less than 90 degrees.

Surface speed for aluminumcalculator

Entrance Angle – The angle formed by a line through the center of the cutter at 90 to the direction of feed and a radial line through the initial point of contact. As this angle approaches 90 degrees the shock loading is increased.

Relief-Space – Provided by removing material immediately behind the cutting edge. Done to eliminate the possibility of heeling or rubbing.

Axial Runout – The difference between the highest and lowest indicator reading that is taken at the face of a cutter near the outer diameter.

Dish Angle – The angle formed by the end cutting edge and a plane perpendicular to the cutter axis. Dish ensures that a flat surface is produced by the cutter.

Gash width – The width of the gash feature. The space between cutting edges, which provides chip space and resharpening capabilities. Sometimes called the flute.

Differential pitch cutters – A specifically designed variation in the radial spacing of the cutter teeth. This provides a variation in tooth spacing and can be beneficial in reducing chatter. This concept is based on reducing the harmonic effect of the tool contacting the part in an exact moment of vibration.