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Drills, taps and hardware

To: spridgets@autox.team.net
Subject: Drills, taps and hardware
From: Daniel1312@aol.com
Date: Tue, 13 Jun 2006 16:34:35 EDT
Hi List,

Collected my hybrid bellhousing today.  This is to fit a Ford type Nine 5 
speed gearbox onto the back of an A-series engine.  The bellhousing in the car 
is 
an earlier fabricated bellhousing that the casting will replace.

I've some jobs to so on the casting including drilling and tapping 3 quarter 
UNF holes for the starter motor cover (will be blanked off since the car uses 
a pre-engaged.

SO, what size drill do I need if I'm going to tap a quarter UNF?

Secondly, the bellhousing has a steel bracket that takes the clutch fork and 
this screws into the bellhousing with a pair of metric M6 Allen caps.  I'd 
like to not only Loctite these 2 bolts into the casting but I'd like to 
lockwire 
them to the pivot bolt for the clutch fork (I realise this is overkill).  I 
can't drill the bolt heads without a drilling jig (my jig is imperial not 
metric) and Allen caps are a sod to drill anyway.

SO,  I don't suppose I can just run my quarter UNF tap down the metric M6 
thread and get away with it can I (I know it's shameful even to ask)?

OR anyone have a source for drilled head metric hardware - Aircraft spruce 
only does imperial stuff?

Thanks

Daniel




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