Technical

This easy to use chart allows you to directly compare Metric, Fraction, Gauge and Inch conversions from 0.3mm through to 40.8mmm.Click on the image to download

The flute form, web thickness and helix angle of the standard drill are suitable for most materials producing semi-continuous chips. Drilling sizes of 13mm and smaller in soft materials which produce continuous chips, e.g. copper, aluminium. A bright finish fast helix drill may be required to move the swarf more effectively. Conversely on materials producing discontinuous chips like brass, gunmetal and some plastics, a slow spiral is preferable. For effective drilling, the rigidity of …

TAP DRILL SIZEOn tough materials like stainless steel we recommend you take advantage of the extra allowance.It is especially important in deep holes of 2 times diameters and greater. In the thread charts that follow the correct tapping size is given in the information. We also give the alternative maximum size, as with good modern drills the drilled hole can be small. Here is a Tapping Chart you can use for reference: (Click to open and download the chart) LUBRICANTS A …

Do you know the difference between the SDS Max and SDS Plus Masonry Drill Systems?The name SDS comes from the German “steck, dreh, sitzt” (insert, twist, fits). Competitors publicise the system on the international market as Special Direct System, although in German speaking nations it is more commonly known as “Spannen Durch System” (Clamping System). SDS Plus Group – 2 Grooves – 2 SlotsStandard SDS – Plus is the most common fitment on the market. It fits all brands of SDS Drills Excluding Some …