Polycarbonate sheeting.

[catlad]

When ever I try drilling a hole in this stuff it does not seem to go very well, it seems to snag has anybody any ideas on how to get a smoother cut.

 

[Burnerman]

Technically you need a drill with a much shallower tip angle than conventional......this isn't the easiest to achieve, so try using a lubricant such as paraffin when you drill.
John

 

[peterperfection]

When ever I try drilling a hole in this stuff it does not seem to go very well, it seems to snag has anybody any ideas on how to get a smoother cut.

Get a 'FORSTNER' BIT SET.
Cheap as chips- you do NOT need a expensive set --lots on ebay I'd bet.
Spray a bit of WD40 on before you drill- and DONT press to hard on drilll- let the drill bit do the cutting.

ps-- remember- P Carb is very thin- and after penetrating the first layer--go slowly down to the 2nd and then the 3rd and maybe the 4th layer.
Easy peasy lemon (sooey) squeezy..

 

[catlad]

Thanks for the advice Since posting I have picked up a bosch bi-metal 14mm hole saw, it has relatively small teeth so I will give this a try and let you know how it goes.

 

[peterperfection]

Thanks for the advice Since posting I have picked up a bosch bi-metal 14mm hole saw, it has relatively small teeth so I will give this a try and let you know how it goes.

Very sorry- I refreshed my memory-- and I used to use AUGER BITS' TO DRILL HOLES IN poly carb .
Any will do- as long as you drill slow .

 

[catlad]

I will try the auger bits on an of cut along with the hole saw and see what happens.

 

[catlad]

Just to let you know the hole saw with the pilot bit worked a treat, I did'nt know they went down to 14mm.