IamRobbie

Well-Known Member

• Jan 15, 2017

• #1

Gonna buy an ashcroft air locker tomorrow from Paddocks to treat myself for my birthday today.

Looking on the website it says the drill bit from ashcroft is 29/64 which is around 11.5mm so I'll buy an 11.5mm drill bit and then the tap I've read is 1/4 bsp however that tap is smaller than 11mm isn't it?

 

stewd

Active Member

• Jan 15, 2017

• #2

(29/64) or 11.8mm drill needed for 1/4 BSP tap, says my Zeus book

See here - http://www.newmantools.com/taps/bsp.htm

Second table down

 

Brown

Well-Known Member

Full Member

• Jan 16, 2017

• #3

Don't forget that the BSP size refers to the inside diameter of the pipe, so they're a lot bigger so as to allow for the wall thickness of those old iron gas and water pipes. So a 1/4" BSP would be around 1/2" in practice. So an 11 point something drill is probably about right.

 

neilly

Well-Known Member

• Jan 16, 2017

• #4

stewd said:

(29/64) or 11.8mm drill needed for 1/4 BSP tap, says my Zeus book

See here - http://www.newmantools.com/taps/bsp.htm

Second table down

Click to expand...

Nice link that, But I do like my good old Zues book,

I lost mine the other month, had it for 20 years, ordered a replacement, one week later found the original.

Now I have two..........

Cheers

 

IamRobbie

Well-Known Member

• Jan 16, 2017

• #5

Cheers guys. Ordered a thread and plug set of taps and brought the locker today with a tyre air set so I just need to find time to fit it all Into the rear, move the arb to the front and at some point I'd like to make a receiver for the compressor so it's got a tank that's a little bigger for airing up tyres. Might use a small fire extinguisher.

 

stewd

Active Member

• Jan 16, 2017

• #6

I'd avoid using an old, fire extinguisher due to needed a fill, return and drain on a tank.

These are cheap enough to pick up these days (£30+depending on size)

 

IamRobbie

Well-Known Member

• Feb 5, 2017

• #7

stewd said:

I'd avoid using an old, fire extinguisher due to needed a fill, return and drain on a tank.

These are cheap enough to pick up these days (£30+depending on size)

Click to expand...

Where from? Could do with one