Drilling Holes for brake pipe clips?

For everything to do with Dolomites, Toledos, FWD cars and Dolomite-based kitcars.
Post Reply
Message
Author
User avatar
DavePoth
TDC Member
Posts: 5723
Joined: Tue Oct 03, 2006 4:50 pm
Location: Next to my Computer

Drilling Holes for brake pipe clips?

#1 Post by DavePoth »

Next task for me is to refit the rest of the brake lines, which involves the run along the front chassis leg (which was replaced years ago). It doesn't have holes for the brake pipe clips in it though, so I need to drill them. The clip I have here is 1/4" round the base of the bit that goes in the hole - do I need a 1/4" bit or can I use a metric equivalent (I guess 6 or 6.5mm) without it falling out?
User avatar
RSi
TDC Member
Posts: 648
Joined: Wed Aug 16, 2017 2:06 pm
Location: Isle of Lewis (Outer Hebrides)

Re: Drilling Holes for brake pipe clips?

#2 Post by RSi »

DavePoth wrote: Tue Nov 21, 2017 11:19 pm Next task for me is to refit the rest of the brake lines, which involves the run along the front chassis leg (which was replaced years ago). It doesn't have holes for the brake pipe clips in it though, so I need to drill them. The clip I have here is 1/4" round the base of the bit that goes in the hole - do I need a 1/4" bit or can I use a metric equivalent (I guess 6 or 6.5mm) without it falling out?
Just do a test hole on something else.
Triumph Dolomite Sprint (RNK 957W)

Automatic, porcelain white - 52,820, genuine mileage (warranted).

Built 26/6/1980, 3 previous owners (2 within the same family).

Supplied by Lavender Hill Garage Ltd, Enfield, London, by garage owner Jimmy Metcalfe on 30th September 1980 to Geoffrey Robinson, Enfield, London.

Club Membership No: 2017092
Carledo
TDC Shropshire Area Organiser
Posts: 7249
Joined: Sun Aug 21, 2011 5:12 pm
Location: Highley, Shropshire

Re: Drilling Holes for brake pipe clips?

#3 Post by Carledo »

The clip hole on these is pretty critical on size, if it's even a tiny bit too big, the clip won't stay in place! Since 6mm is slightly OVER 1/4" even that might be a bridge too far! As Murdo said, you can try by experiment on a spare bit of steel and if that doesn't work, fork out for a 1/4" drill bit, i'm sure they are still available!

Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
GTS290N
TDC Member
Posts: 1022
Joined: Fri Jan 08, 2016 9:00 pm

Re: Drilling Holes for brake pipe clips?

#4 Post by GTS290N »

Or buy some new clips, I bought some from Robsport (numpty9 on ebay but 'phone was easy) and where I couldn't re-use the old ones I found I had to drill the hole with a larger drill bit, as Steve says the size is that critical. The new ones are black plastic, the old ones were white. And I bought way more than the number needed as spares, and used them!
User avatar
sprint95m
TDC Member
Posts: 6503
Joined: Thu Aug 09, 2007 1:22 pm
Location: Caithness, Scotland

No, no….

#5 Post by sprint95m »

Carledo wrote: Wed Nov 22, 2017 12:23 amSince 6mm is slightly OVER 1/4" even that might be a bridge too far!
There are 25.4mm in one inch, so 1/4" = 6.35mm


Ian.
TDC Forum moderator
PLEASE help us to maintain a friendly forum,
either PM or use Report Post if you see anything you are unhappy with. Thanks.
User avatar
SprintMWU773V
TDC Staffs Area Organiser
Posts: 5429
Joined: Wed Oct 18, 2006 2:08 pm
Location: The Old Asylum

Re: Drilling Holes for brake pipe clips?

#6 Post by SprintMWU773V »

Controversial but why not buy an imperial drill bit? They aren't difficult to find.

Alternatively have you considered using something like a small P clip which can be attached using a self tapper?
Mark

1961 Chevrolet Corvair Greenbrier Sportswagon
1980 Dolomite Sprint project using brand new shell
2009 Mazda MX5 2.0 Sport
2018 Infiniti Q30
Carledo
TDC Shropshire Area Organiser
Posts: 7249
Joined: Sun Aug 21, 2011 5:12 pm
Location: Highley, Shropshire

Re: No, no….

#7 Post by Carledo »

sprint95m wrote: Wed Nov 22, 2017 1:41 pm
Carledo wrote: Wed Nov 22, 2017 12:23 amSince 6mm is slightly OVER 1/4" even that might be a bridge too far!
There are 25.4mm in one inch, so 1/4" = 6.35mm


Ian.
My bad Ian, I was remembering my clutch pipe conversion on the Carledo where I put the 6mm pipe into an imperial union for the master cylinder and got it the wrong way round, I had to drill the 1/4" union to take a 6mm pipe which is what made me think it was that way round.

Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
User avatar
DavePoth
TDC Member
Posts: 5723
Joined: Tue Oct 03, 2006 4:50 pm
Location: Next to my Computer

Re: Drilling Holes for brake pipe clips?

#8 Post by DavePoth »

RSi wrote: Tue Nov 21, 2017 11:34 pm
DavePoth wrote: Tue Nov 21, 2017 11:19 pm Next task for me is to refit the rest of the brake lines, which involves the run along the front chassis leg (which was replaced years ago). It doesn't have holes for the brake pipe clips in it though, so I need to drill them. The clip I have here is 1/4" round the base of the bit that goes in the hole - do I need a 1/4" bit or can I use a metric equivalent (I guess 6 or 6.5mm) without it falling out?
Just do a test hole on something else.
That would make sense, wouldn't it? #-o

:mrgreen:
Post Reply