help needed boring 8mm holes 20mm depth in Alu

**magicniner** · 22-04-2016

I use lots of air to clear chips and a bit of WD40 now and then to stop the chips sticking to the cutter BTW

**m_c** · 22-04-2016

You need to get chips out the hole, and lubrication in.
Without either of those, it's not going to end well in deep holes!

**cropwell** · 23-04-2016

http://www.arceurotrade.co.uk/Catalo...eries-Uncoated

**Noplace** · 24-04-2016

thank you , used a single flute bit to do it, it wasn't meant for alu I think only for alu but it got the job done

**magicniner** · 24-04-2016

The 1/8" single flute bits I use for Aluminium alloys, brass and bronze are advertised for engraving and plastics use, I sharpen them with a little more relief and I've yet to have one chip or break, attached is a photo of a prototype linear tracking air-bearing tone arm I profiled from solid with a 6mm uncoated single flute bit, air to clear chips and a little squirt of lube every few passes and the bits just keep on running,
Regards,
Nick