The fast and easy method to drill holes in metal, is with the help of Annular cutters, also called as annular cutters, core drills, etc. Following pictogram images will show you how one can use annular cutters like a professional. Carefully practicing the following method of drilling will help you get more holes per cutters, longer service life of cutters, less tool breakage and longer service life for your magnetic drilling machines too.
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1 Select the correct annular cutter for the material to be drilled.
2 Select the correct ejector pin for the cutter length.
3 Insert the ejector pin inside the annular cutter. Never use an annular cutter without an ejector pin.
4 Insert the annular cutter in the machine arbor and tighten the screws correctly.
5 Move the machine towards the mark where the hole is to be drilled and with the help of the pilot pin locate the mark by touching the tip of the pilot pin over the mark.
6 After position the machine on the mark where hole is to be made, switch on the magnet switch. Check if the magnet indicator glows GREEN.
7 Fill the coolant tank with BDS lubricant. Never use the machine without lubricant.
8 Set the correct RPM on the machine for the size of cutter being used.
9 Turn ON the coolant tank knob.
10 You must use the internal lubrication when drilling with annular cutters. Also use external lubrication when drilling above 50 mm thickness.
11 Switch ON the motor switch and start to drill with slow feed. Never crash the cutter on to the material.
12 Start to drill with firm steady feed rate. Too slow or too fast a feed rate will damage the cutter.
13 Check if the lubricant is coming out. Use lot of lubricant for good results.
14 Putting too much pressure on the feed handle will not make drilling faster; instead it will break the cutters.
15 Drill with less pressure and steady feed for best results and longer service life of annular cutters
16 To prevent long chips forming you should use reverse feed when cutting deep holes.
17 To prevent accidents clean the work area with BDS PowerWORKER after drilling.
18 Perfect drilling with the above instructions will result in perfectly finished holes, in less time and with more service life of both cutter and machine.
a. Below 40 mm diameter drilling always use HSS annular cutter. HSS annular cutters compared to TCT annular cutters are price economical, re-sharpen able, re-usable, needs less power, etc.
b. Use TCT cutter only while drilling above 40 mm diameter
c. Always use special lubrication for drilling. Do not use general lubricants. We recommend you to use BDS Lubricants & Coolants.
d. While drilling with annular cutters, feed pressure should not be too low or too high, let the cutter cut the material by rotating and not by vertical pressure. Applying more pressure will not make faster holes, rather it will damage the armature of the machine and damage the annular cutter.