Sandblasting nozzle using spark plugs

[brightspark]

And very expensive :P

18 quid expensive not realy mine has lasted 6 years and used regular its supposed to be 3mm and I just checked it and its now 3.5mm so it aint worn much in all that time my 6.0mm jets supposed to be about 7o quid and I scored a few for £20

 

[brightspark]

you need loads of cfm even for a 6mm nozzle

minimum of 75 cfm I run mine at 90 cfm and comp runs at full whack till I introduce the grit and it slightly slows down

 

[brightspark]

Until I buy the the tungsten nozzle I am going to try the car spark plugs, but my "sandblast gun" is a 1/2" ball valve which has more than 10mm hole and the small hole of the spark plug is 3mm how do I evenly reduce the size (is there like any rubber piece?), I tried it without anything and the gun gets jammed with abrasive

you need to reduce the flow of media to the blast jet or it will clog up and flood the hose. they all do

 

[brightspark]

Really??? I saw one that costed like 30 dollars

oops I meant 17 quid from ace