Dormer PrametUnit 4 Lindrick Way S43 4XE Barlborough, Chesterfield, United KingdomT: 0870 850 4466F: 0870 850 8866
Increasing the number of flutes makes the load on each tooth more homogeneous and, consequently, this allows for a better surface finish. When using milling cutters with a high helix angle ensure the tool holder is good quality and has sufficient clamping forces.
Dormer has strengthened its solid carbide milling programme with the addition of 44 new products. These include additions to existing families as well as several completely new ranges and provides a comprehensive offer covering almost every material type and application.
Taps with straight flutes: Straight flutes are the most commonly used type of tap, suitable for use on most materials including short chipping steel and cast iron.
Quick helix drills are more appropriate for long chipping, ductile alloys eg. stainless steel and aluminium.
Taps with interrupted thread: The interrupted thread ensures less friction and therefore less resistance, which is particularly important when threading material which is resilient and difficult to machine (e.g. aluminium, bronze).
Ball nose end mills feature a semi-sphere at the end of the tool and are used extensively in the machining of dies, moulds, and on workpieces with complex surfaces.
The correct use of Morse Taper Shank drills relies on an efficient fit between the taper surfaces of the tool and the tool holder. The use of a soft-faced hammer should be used to drive the drill into the holder.
In climb milling, also called down milling, cutting starts with the chip at its thickest location. The feed movement and the tool rotation have the same direction. Climb milling is the first choice.
Select the correct cutting speed as shown in Dormer's Catalog and Product Selector
The use of suitable coolants and lubricants are recommended as required by the particular drilling operation. When using coolants and lubricants, ensure a copious supply, especially at the drill point.
