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 Post subject: Cutting Thread - Tap
PostPosted: Mon Nov 13, 2006 5:57 pm 
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998cc
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Joined: Mon Oct 18, 2004 1:44 pm
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Location: Brisbane
I'm in the process of seat swapping and doing it legally
My engineer told me to use at least 8mm bolts for the seat mounts
the stock bolt I think is around 1/4" for the fronts

Now is it easy to tap a new thread like M8 using a hand tap tool like this
Image


Cheers


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PostPosted: Mon Nov 13, 2006 6:59 pm 
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Location: Perth, W.A
Yes, trick is to go slowly and 2 turns forward for one turn backwards to get metal out as you tap...

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 Post subject:
PostPosted: Mon Nov 13, 2006 6:59 pm 
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Also make sure it's a 7mm hole you are tapping...

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 Post subject:
PostPosted: Mon Nov 13, 2006 7:03 pm 
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diffrent people have diffrent views but use some cuttin compound to helps 8)

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 Post subject: Tapping
PostPosted: Mon Nov 13, 2006 7:15 pm 
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Location: Sthrn HiLoLands, NSW, Australia
YoungMiniac wrote:
Yes, trick is to go slowly and 2 turns forward for one turn backwards to get metal out as you tap...


Two complete turns may sometimes be too much.....half to a full turn then back it off a quarter to crack the piece off you have cut is more like it. Take it easy and make sure you are keeping it vertical.

Depends on whether you have the correct diameter hole for the tap and the type of metal you are tapping.

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 Post subject:
PostPosted: Mon Nov 13, 2006 7:22 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
Recommended drill size for 8mm tap is 6.8, but a 7.0mm works for most purposes.
Drill it straight, then tap it straight... or it'll look like crap. :wink:

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 Post subject:
PostPosted: Mon Nov 13, 2006 8:58 pm 
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Location: Brisbane
it's gonna be an awkward position as I have to drill horizontally

Image

will give it a go

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 Post subject: Re: Cutting Thread - Tap
PostPosted: Tue Nov 14, 2006 8:35 pm 
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Location: Sydney, E. Burbs
Razor wrote:
I'm in the process of seat swapping and doing it legally
My engineer told me to use at least 8mm bolts for the seat mounts
the stock bolt I think is around 1/4" for the fronts

Now is it easy to tap a new thread like M8 using a hand tap tool like this
Image


Cheers


The tap set you've got there looks like the cheapie 12.95 Super Cheap job. They're ok if you only tap a couple of holes (apart from the weird size mismatch in the set), but the problem with this set is that the more compact tap holder with the sliding bar (the black tool in the middle in your set) which makes it useable in tight places (which is pretty much everywhere in a mini ) is too small and will only fit the smallest tap sizes. So for 8mm you'll have to use the big, wide silver holder at the back of your set which will be a nightmare to use on the seat mounts.

I reckon you're better off buying a decent tap holder and the single correct tap size (ratcheting tap holders make the job even easier).


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 Post subject:
PostPosted: Tue Nov 14, 2006 9:20 pm 
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Joined: Mon Oct 18, 2004 1:44 pm
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Location: Brisbane
that pic was just a random find from ebay

I havent bought a set yet, I prefer to buy individual items as I wont be needing the other sizes anyway and would like to buy a good brand as well.


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