Dormer PrametUnit 4 Lindrick Way S43 4XE Barlborough, Chesterfield, United KingdomT: 0870 850 4466F: 0870 850 8866
Avoid impact at the point of drill to prevent splitting of the web. Take care with taper shank drills when inserting or ejecting from a spindle.
Incorrect axial feed rate in tapping can cause oversizing. Reduce rate by 5-10% or increase compression of tap holder to avoid this happening.
Avoid tool breakage caused by too high stock removal by decreasing feed per tooth.
Dormer has launched a new solid carbide drill for applications up to 8xD.
Dormer uvádí novou aplikaci Toolbox pro chytré telefony a tablety.
If suffering with a bad fit between shank and socket, ensure both are clean and free from damage to avoid broken and twisted tangs.
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.
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).