jabbahutt
|
 posted on 12/11/07 at 04:52 PM |
|
|
any help with this
Hi
I need to drill two M10 holes in my nose cone for the indicators. I know an M10 washer fitted in the recess of the nose cone will be show the perfect
place to drill.
My drilling ability is pretty dire and wonderedi f anyone had any tips as to how to drill in the middle of the hole in the washer so when i fit the
indicators they'll be exactly where i want them.
i was planing on using a cone drill but if I start off centre it'll end in tears
Any tips appreciated so I can cross another job off the to do list, plus I want to see what they look like fitted 
Thanks all
|
|
|
|
|
whitestu
|
| posted on 12/11/07 at 04:56 PM |
|
|
Mark and drill a small pilot hole first.
That should make it easier to get an accurate 10mm hole.
stu
|
|
|
JAG
|
| posted on 12/11/07 at 05:13 PM |
|
|
Gotta agree with Stu. Drill small first, say 2mm or less then slowly enlarge until you get up to 10mm diameter.
I'd go up in maybe 4 steps; 1.6mm/4mm/7mm then 10mm.
The more accurate you want the result the more drill sizes and the smaller the step up at each drilling. Yes it'll take a bit longer but
it'll be worth it
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
|
|
|
Paul TigerB6
|
| posted on 12/11/07 at 05:13 PM |
|
|
And tape over where you are planning to drill, then drill very gently from the gelcoat side once you have your pilot hole (smallest drill bit you
have!!) to (hopefully!!) prevent the gelcoat from chipping.
|
|
|
MikeR
|
| posted on 12/11/07 at 05:16 PM |
|
|
i think the question was ....
I've got to drill a 10mm hole, i can mark where the hole needs to be, how do i find the centre to start off the pilot hole.
(or i'm a completel muppet and completely miss understood)
|
|
|
chriscook
|
| posted on 12/11/07 at 05:23 PM |
|
|
Drill increasing size holes, when you get near one edge break out the needle files. Fibreglass is easy to file through.
|
|
|
twybrow
|
| posted on 12/11/07 at 05:29 PM |
|
|
MikeR that was how i read it. No problem with the drilling, just the location itself...
I guess the old saying 'measure twice, cut once' springs to mind!
How square/true is the nosecone? There is no point spending hours checking your measurements if the datum you are using are different on the two
sides!
|
|
|
Howlor
|
| posted on 12/11/07 at 05:35 PM |
|
|
What I would so is glue together say 3 10mm washers to act as a jig. Then first use the 10mm drill bit contrary to the above. Just drill enough to put
a mark in the centre of the hole. Then go for a 4mm drill using the mark to in the centre to stop it wandering. Then back to your 10mm to finish
off.
Steve
|
|
|
BenB
|
| posted on 12/11/07 at 05:51 PM |
|
|
Either
a) measure twice, cut once
or
b) measure, cut, discard, repeat
Bit of masking tape on the fglassfibre stops the drill slipping nicely.
|
|
|
Paul TigerB6
|
| posted on 12/11/07 at 06:09 PM |
|
|
quote:
Originally posted by MikeR
i think the question was ....
I've got to drill a 10mm hole, i can mark where the hole needs to be, how do i find the centre to start off the pilot hole.
(or i'm a completel muppet and completely miss understood)
I would have thought Nigel could mark the centre of the hole in a 10mm washer pretty accurately using a pen / pencil with some masking tape behind it
and then start off with a 1-2mm drill bit and work through the drill sizes up to 10mm. Really cant imagine being to the nearest 1/10th of a mm is
gonna be required for this job.
|
|
|
Confused but excited.
|
| posted on 12/11/07 at 06:16 PM |
|
|
Fix the big 10mm washer in place with masking tape.
Then fit a smaller washer inside the big one.
Mark centre of small hole.
Drill pilot hole.
Job done. HTH
Tell them about the bent treacle edges!
|
|
|
JoelP
|
| posted on 12/11/07 at 06:28 PM |
|
|
use an axe.
|
|
|
Paul TigerB6
|
| posted on 12/11/07 at 06:44 PM |
|
|
quote:
Originally posted by JoelP
use an axe.
Stupid Boy!!! [said in a Mr Mannering-esque voice]
|
|
|
prelude1980
|
| posted on 12/11/07 at 06:47 PM |
|
|
i used a forstner bit they are brilliant for fibreglass.
Speed has never killed anyone. Suddenly becoming stationary... that's what
gets you.
https://www.topcashback.co.uk/ref/dodd1980
|
|
|
Peteff
|
| posted on 12/11/07 at 07:43 PM |
|
|
Don't worry if it's a bit out, 5mm is not going to be noticed with the naked eye. Just look at Tiger wheel arches
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
jabbahutt
|
| posted on 13/11/07 at 08:51 AM |
|
|
many thanks all for the tips, my oroginal question probably wasn't very clear.
It was a combination of accuratley gauging the centre of the washer hole combined with my inabilty to drill well so all your posts provided me with
some information.
Well must go and get my axe now to get my holes drilled
Thanks again
|
|
|
Phil.J
|
| posted on 13/11/07 at 09:19 AM |
|
|
Buy youself a set of transfer punches from somewhere like J&L. Makes a job like this a cinch, and you'll soon wonder how you did without
them.
http://www.jlindustrial.co.uk/IMP-75780J/SEARCH:KEYWORD/product.html
|
|
|
Marcus
|
| posted on 13/11/07 at 05:23 PM |
|
|
If you're drilling fibreglass, make sure the bit isn't too sharp - it may snag and shatter the gelcoat around the hole. Likewise,
I'd use the 10mm from the start, not using too much pressure and have the drill going fast.
Trying to enlarge a small hole in fibreglass is fraught with danger!!
(Guess how I know!!!)
Marcus
Because kits are for girls!!
|
|
|
