Health & Safety

Health & Safety at Yorkshire Diamond Products Limited is of paramount importance to our customers and ours employees and our selves. We take pride that our staff is all up to date with all the rules and regulations of Health & Safety in the workplace. Training is kept up to date with our staff and is monitored regularly.



  1. Ensure the diamond core drill specification is suitable for your application i.e. material to be drilled, machine type etc.
  2. Drill pilot holes first with a conventional tungsten tipped bit. If directional accuracy is very important the guide hole should be full depth.
  3. Assemble appropriate adaptor, guide rod and diamond core drill and then insert chuck into drill machine. Ensure machine chuck is securely tightened (in case of 3 jaw chuck).
  4. Ensure that your body position is directly behind your drill to give an accurate position for the hole.
  5. Put guide into pre-drilled pilot hole and start the machine, introduce the diamond core drill gently into the material. Please Note: A tungsten carbide guide drill can be used together with the diamond core drill, however it is not recommended that this set-up is used to drill the full depth of the hole.
  6. To avoid jamming in the hole you should ensure that the machine is held as rigidly as possible to prevent deviation from the direction of drilling.
  7. During the drilling process remove the drill from the hole regularly and ensure that the hole is free of loose debris that can cause jamming. Also check the segments for signs of glazing and check the barrel for stress cracks.
  8. To remove the core material from the diamond core drill point the diamond core drill downwards. It the core material does not fall out you should remove the adaptor and insert a rod through the fitting and gently tap out the core. Do not lever against the side of the diamond core drill as this will lead to distortion.


Follow the above guidelines for dry drilling but you will not be able to use a centre guide so we would advise you to use a drilling rig to hold the diamond core drill in place or some form of template to drill through when you are starting the hole. This could be made from a piece of wood with the appropriate size of hole drilled through for example.

Ensure that an adequate flow of water is maintained while drilling as any interruption to the water supply could lead to damage to the diamond core drill. As a rough guide the water coming out of the hole should be slightly coloured with debris and not clean. Too much water pressure will reduce the efficiency of your operation. The water feed should be an internal feed through the drill of water swivel.


  1. Check diamond core drill thoroughly before use for sign of cracks or damage.
  2. Secure diamond core drill to the machine firmly to prevent any vibration.
  3. Do not use excessive force when using the diamond core drill.
  4. Do not drop the diamond core drill or strike it with hard objects.
  5. Stop drilling immediately if you notice anything unusual. Inspect your diamond core drill and the machine thoroughly and rectify any problems before proceeding.
  6. If the cutting action of the diamond core drill decreases you can open the diamond up by drilling into a grit wheel, concrete block or sandstone.