Advice on Best Drill to use to drill hole for SO239 mount.

[WeatherWatcher]

Ok I need to drill a hole in my car roof to fit a mount for my dualband antenna. Have found nothing in the way like ribs or wiring under the head lining but now need to purchase a drill bit 16mm dia for the one hole- what would people recommend?
Because it is almost centre of the roof longitudanally should be OK. I know about the getting a good earth bit and cleaning any burrs off the edge of the hole. Any other advice welcome.

[MrWeetabix]

16mm seems big.... double check that fella!

[WeatherWatcher]

SO 239 mount. Will get mount first and then sort out drill when confirmed size.

[26TM931]

SO 239 mount. Will get mount first and then sort out drill when confirmed size.

you have a pm

[dt307]

here you go

[Dragonfly]

If you have this type i think they need a 12mm DV connector hole http://www.thunderpole.co.uk/fixed-body ... t-kit.html

Check u have around 35mm space between head lining and roof .

[WeatherWatcher]

Thanks Dragonfly that is the mount I intend to use, getting it with mini 8 coax cable from http://www.4x4cb.com/ who are not too far away from me- local enough to arrange a pick up to save on carriage( tight wad that I am).

[thedeerhunter270]

What about a Cone Drill.

http://www.screwfix.com/p/cone-drill-bit-set/45562

[stanogs68]

just hammer a six inch nail through it ,but use good heavy lump hammer to get it through with one all mighty smack

[porky.69]

just hammer a six inch nail through it ,but use good heavy lump hammer to get it through with one all mighty smack

pmsl

[vx900]

i use one of these they are excellent
http://www.ebay.co.uk/itm/16-to-60mm-93 ... NEXoFt1hDA


for roof's you might want to consider these
http://www.ebay.co.uk/itm/Q-Max-QMA16M- ... SwbYZXf2Uj

[VintageTin]

Q-max would be my preference, assuming a very low crown panel as, by the very nature of the way it works, it could locally distort any curved panel.

An ideal way of cutting accurate, clean, holes.

[sec1223]

stepped drill bit.. best idea

[ke7azd]

Place duct tape over the head liner so it doesn't bunch up and rip / shred. I used these drill bits.




73's

[grafter]

When I did this to my Landrover I found the roof panel to be too flexible so added a sheet of aluminium underneath large enough to tuck under the nearest support rib that ran over the roof. This meant sourcing an SO239 mount that had a longer threaded section.