blakep82
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| posted on 27/1/10 at 01:44 PM |
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drilling for thread taps
not ideal perhaps, but i'm going to use a PCL air fitting for my axle breather. its something i'll be able to replace easy enough if i
ever need to etc.
the thread i believe is 1/4" BSP, so i'm going to cut that into my axle tube. what size drill do i need?
preferably in mm. 10 or 12mm?
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Phil.J
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| posted on 27/1/10 at 01:49 PM |
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11.8 mm is drill size for 1/4 BSP
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MikeCapon
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| posted on 27/1/10 at 01:49 PM |
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Blake you need an 11.8mm drill to tap 1/4 " BSP
ETA Bu$$er. Second. Must type faster...
[Edited on 27/1/10 by MikeCapon]
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Madinventions
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| posted on 27/1/10 at 01:49 PM |
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1/4 BSP is 11.8mm drill size for tapping.
Information from here
Ed.
Edit: Too late again! 3 answers all at the same time. 
[Edited on 27/1/10 by Madinventions]
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View my band website:
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blakep82
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| posted on 27/1/10 at 01:51 PM |
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nice one cheers guys
would 12mm be ok? i fancy my chances of finding a 12mm drill better than 11.8mm 
the PCL fitting is a taper thread if that makes a difference?
________________________
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Madinventions
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| posted on 27/1/10 at 01:57 PM |
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Taper thread 11.2mm...
Mojo build diary: http://www.madinventions.co.uk
Solo music project: Syrrenfor http://www.reverbnation.com/syrrenfor
View my band website:
http://www.shadowlight.org.uk
http://www.eastangliankitcars.co.uk/
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blakep82
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| posted on 27/1/10 at 02:04 PM |
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11mm then? 
or 11mm then open out a little with dremmel?
years ago i had to re tap a thread which a weld penetrated a long way into (about 4mm)
i ran the tap down with lots of grease, and it wore away at the weld perfectly. so while 11.8 or 11.2 for the taper is the most ideal one, will 11mm
do it?
i can't afford to be getting special drill sizes and stuff i just wanted to get it done
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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BillHoll
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| posted on 27/1/10 at 02:23 PM |
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You could use an imperial sized drill which is 7/16'' = 11.1mm and I have used this size before without any problems
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dhutch
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| posted on 27/1/10 at 02:41 PM |
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If its thinish casing i think you would get away with a 11m, opened out a bit maybe.
- Can certainly try it and see how it goes, just dont force the tap and snap it. Anywhere that sells taps will sell tap drills to suit.
Daniel
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boggle
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| posted on 27/1/10 at 03:04 PM |
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if its a taper thread make sure you tap it to the correct depth or the taper is a waste of time....
just because you are a character, doesnt mean you have character....
for all your bespoke parts, ali welding, waterjet, laser, folding, turning, milling, composite work, spraying, anodising and cad drawing....
u2u me for details
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blakep82
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| posted on 27/1/10 at 03:08 PM |
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am i right in thinking i'd put a normal thread into the axle if the air line fitting is tapered?
the axle tube is about 10mm thick i think. i can't remember.
i hate threads they confuse the hell out of me
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Peteff
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| posted on 27/1/10 at 04:10 PM |
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Drill a hole in the axle and weld a nut to it to take the fitting. What axle is it at 10mm thick ? That is really heavy most are more like 2mm.
[Edited on 27/1/10 by Peteff]
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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blakep82
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| posted on 27/1/10 at 05:31 PM |
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quote:
Originally posted by Peteff
Drill a hole in the axle and weld a nut to it to take the fitting. What axle is it at 10mm thick ? That is really heavy most are more like 2mm.
its a heavy duty retubed atlas axle. all parts supplied by SHP as used on their racing trucks. not a really clear photo, but you get the idea
click
interesting idea though. i had hoped to avoid putting any more heat in, but might well decide to go that way
so one of these welded on?
link
wouldn't need much heat in there really would it?
[Edited on 27/1/10 by blakep82]
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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