Anyone drilled the air hole on a Kayfun?

[Adam78]

Just wondering if these drill bits would do the job?

Ebay Drill Bits

The air hole is only 1mm so was thinking I would take it up to 1.5mm first and then 1.8mm

Any one done this before?

Cheers

[VapingBad]

I have drilled 4 to 2.5 mm, I would get Titanium bits (Maplin recently had a set really cheap but you have to be lucky with them being in stock near you link). Strip it right down especially the centre pin for the 510 and the air flow screw, drill 2 mm first, then 2.5 mm, don't push too hard on the drill and always keep lubricated with some oil.

[Ripshod]

As per VB, spend your money on a good drill bit and it'll last a lifetime. No cutting corners when drilling SS.

[igual]

Ye make sure you use cutting oil/fluid and make sure you use a vice to hold it.
To protect its finish wrap in a few turns of electrical tape to stop it getting scratched by the vice.
Use good HSS/titanium coated bits .
Drill out a half mill size at a time.
Drill in and out gently to remove swarf and make sure drill is straight to avoid jamming/ snapping bit.

[Adam78]

ok, will pick up that set of titanium bits from Maplin tomorrow, cheers fellas.

[Adam78]

Nov 7, 2014 17:18:14 GMT igual said:

make sure you use cutting oil/fluid

Am wondering if I've got something around the house that would be ok to use instead of ordering a big bottle of cutting fluid.

Something like..."Appliance oil" (came with hair clippers), silicone grease, VG, olive oil?

Do you think any of those would be ok?

[Deleted]

I've not drilled a kayfun but have worked with Stainless brewery equipment.

Titanium Aluminium Nitride coated HSS bit will do the job, but Cobalt bits are designed for hard steel like Stainless and will last longer.

As VB said apply pressure but not to much, let the bit do the work. Use cutting fluid, a squirt of oil and a good trickle of water from a hose pipe will keep the drill bit tip cool and It'll last longer.

You already have a pilot hole so it should be easy.

[VapingBad]

Nov 7, 2014 17:29:59 GMT Adam78 said:

Nov 7, 2014 17:18:14 GMT igual said:

make sure you use cutting oil/fluid

Am wondering if I've got something around the house that would be ok to use instead of ordering a big bottle of cutting fluid.

Something like..."Appliance oil" (came with hair clippers), silicone grease, VG, olive oil?

Do you think any of those would be ok?

Probably, I used 3 in 1 oil or engine oil, it's mainly for cooling.

[igual]

Standard water will do the job at a push.
If you have an old candle drill into it so the drill is nicely coated.
Get a bendy straw a empty coke bottle and some string ( blue peter time)
Make hole in bottom of bottle poke straw in and gluebor tape it so its held in and doesn't leak tape string to it so you can suspend it merely above your vise. Point bendy straw at it then put a peg on straw to stop water flow. fill bittle with water release and let water flow in gentle stream over workpiece whilst you use both hand to guide drill.
Heath robbinson but will work, used similar bojups to provide cooling before when drilling steel.

[Adam78]

Nov 7, 2014 17:30:57 GMT @scooby said:

but Cobalt bits are designed for hard steel like Stainless and will last longer.

So do you think those "Heller HSS Cobalt Drill Bits" I linked to on Ebay in my first post would do the trick scooby?

[Deleted]

Nov 7, 2014 17:40:37 GMT Adam78 said:

Nov 7, 2014 17:30:57 GMT @scooby said:

but Cobalt bits are designed for hard steel like Stainless and will last longer.

So do you think those "Heller HSS Cobalt Drill Bits" I linked to on Ebay in my first post would do the trick scooby?

Yes but how many do you need? One of each of These in the size you need may be a better buy.

Regarding cutting fluid, it's just an oil/water emulsion, the oil lubricates and the water cools. So a squirt of your hair clipper oil or 3 in 1 plus a constant trickle of water will do the trick

[monty]

I bought mine from www.arceurotrade.co.uk/Catalogue/Cutting-Tools/Twist-Drills/Drill-Bits---Cobalt

[River]

Nov 7, 2014 17:40:37 GMT Adam78 said:

Nov 7, 2014 17:30:57 GMT @scooby said:

but Cobalt bits are designed for hard steel like Stainless and will last longer.

So do you think those "Heller HSS Cobalt Drill Bits" I linked to on Ebay in my first post would do the trick scooby?

Where in the midlands are you
if you are near willenhall/walsall i have some drills you can have or i could post?

[decoy]

ok i have done this and mucho swearing was involved lol
dont buy cheap drill bits(youll end up buying more trust me)
as said above gently gently wins the day
electrical tape is a must but not just for round the bit your drilling put a fair few wraps round the threaded bit the chimney screws on to(a snaped drill bit tends to let the drill run wild and you dont want to damage that bit)
set your drill as slow as it will go because once you get ss hot nuff it get harder
and last but prob most inportant bit is take extra care when you get to the air adjustment hole as it really really do like to snap you drill bit at that point and it can be a ruddy pain too get the snapped bit out
i wouldn't bother going much above 2mm as there isnt much diff if any between 2 and 3mm on the draw (kinda restricted by the size of the center pin hole)
it is worth doing if you like an airy draw but not the most fun thing to do

[mart166]

Theres not a lot I can add to the good advice apart from good quality drill bits, making hands for my clock using blades from an industrial cutter as base material as it was ideal, much puffing and filling to get them right, then it came to drilling, used HSS bits, ruined one hand had to start all over again, this time used cobalt bit, like hot knife through butter with no coolant, although done slowly. You do get what you pay for. It cost me £5 for the bit, it cost me 8 hours of wasted time for the ruined one.

MP