Frequently Asked Questions - Technical


  Q.  Why drill with annular cutter (mag drill bits)?

  A. 

Why Drill with Annular Cutter ( Mag Drill Bits ) ?



  • Fast (Time Saving)
  • Efficient (Energy Saving)
  • Less wear (Longer life)
  • Clean Hole (Burr-free)


An Annular Cutter, with a center free annulus bell shape, is used to make holes in metal and is 3 to 4 times faster than twist drill bit.


Find more information in our article: Why Drill Metal with Annular Cutter (Mag Drill Bits) in Magnetic Drill?


  Q.  How to maintain the magnetic drilling machine?

  A. 

How to Maintain a Magnetic Drilling Machine



If using the Magnetic Drill in a good way, it will have a longer service life with good performance !


  • Always follow the operating manual. 
  • A quick examination for anomalies before and after using it.
  • Do not over drive or under drive the gear.
  • Clean the chips and residual cutting fluid from the machine, slide and links.
  • Apply slight grease on the slide system and links of the machine.
  • Replace parts that are already worn or damaged.
  • Empty the cutting fluid in the container.
  • Carry the magnetic drill with packaging box for long distance.


Find more information in our article: The Complete Guide to Portable Magnetic Drills (With Video)


  Q.  How to drill rebar embedded in concrete?

  A. 

How to drill rebar embedded in concrete?



When drilling a hole into concrete, there is a high chance to hit the concrete-embedded rebar. We provide a unique product, HAA Rebar Cutter, for you to cut through rebar easily!


Find more information in our article: How to drill rebar embedded in concrete?


  Q.  How to use a step drill properly?

  A. 

How to Use a Step Drill Bit Properly?

Step drills are drill bits easy to cut and enlarge a wide range of holes on thin sheet metal, plastic and other materials at a lower speed. Due to the stepped design of multiple diameters, you can drill different-sized holes by one or two step drills.


Find more information in our article: How to use a step drill properly?

Find more information in our article: What is a step drill bit?


  Q.  How to drill a screw hole in sheet metal faster?

  A. 

Drill and Tap a Screw Hole in Sheet Metal in One Step

Usually, a burr-free screw hole (tapped hole) is created by using a drill bit, a countersink and a tap which really takes time.

Our 3 in 1 Drill Tap (spiral flute and straight flute) combines Drill bit, Tap and Countersink into ONE tool for you to drill a screw hole in just ONE step!


Find more information in our article: Drill and Tap a Screw Hole in Sheet Metal in One Step


  Q.  How to choose a drill tap size?

  A. 

Example1: M6x1.0 drill tap is for M6 screw

X = M6 means the outside diameter of the screw and the tap = 6mm

Y = Pitch of the screw (distance between threads) = 0.5mm

X – Y = Diameter of pilot drill and inner diameter of the screw and the tap = 6 - 1.0 = 5mm


Example2: 8-32NC drill tap is for size 8 screw with 32 threads per inch

X = the outside diameter of the screw and the tap = 4.17mm

Y = Pitch of the screw (distance between threads) = 0.79mm

X – Y = Diameter of pilot drill and inner diameter of the screw and the tap = 4.17 - 0.79 = 3.38mm!


Find more information in our article: Drill and Tap a Screw Hole in Sheet Metal in One Step


  Q.  Do we need to add a water-coolant device? What should we do?

  A. 


To increase the working performance, a water-coolant device is necessary.

To increase the working performance, a water-coolant device is necessary. Most of TCT Annular Cutters and HSS Annular Cutters need the water-coolant device; however, there is an exception for Hole Cutters.


  Q.  When it becomes difficult to cut, what can we do?

  A.

When the material is too hard to cut , please use the products contain Cobalt or use T.C.T. Annular cutter products.

When the material is too hard to cut , please use the products contain Cobalt or use T.C.T. Annular cutter products.


  Q.  How to fasten the shank of HC Type?

  A.

One-touch shank of 3keego HC type annular cutter

For one-touch shank :

  1. Firstly, there are 3 grooves on the shank and one beads-hole.
  2. Secondly, there is a shorter line on the machine pipe.
  3. Finally, plug the beads-hole aspect into the machine pipe with the short line.

Weldon shank of 3keego HC type annular cutter

For Weldon shank :

  1. Firstly, please find the flat surface to plug the hole cutter into the machine.
  2. And then, lock the screw tightly.


  Q.  How to put in Hole Cutter correctly?

  A.

Adjust shank to the right position

  1. Firstly, as you can see from the top of the shank, there are three flat surfaces. Choose any flat surface and put in the hole clip.
  2. Secondly, make sure if it is firm. If it shakes, please adjust to the right position.



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3keego
3keego

3keego transforms good ideas into reality by developing innovative cutting tools and equipment that has been instrumental in upholding our reputation for World-Class products.