The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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PostPosted: Wed Nov 01, 2017 10:26 pm 
TDC Shropshire Area Organiser

Joined: Sun Aug 21, 2011 4:12 pm
Posts: 4275
Location: Highley, Shropshire
Something along these lines would help, ... 0795899055

You would need a block bigger than the dial being cut out behind the dashboard, which has to stay to allow the
recess to be made, ie: the auger part will need the block after cutting the first hole out.

Also put masking tape over the veneer to minimise chipping, cut from veneer side.

Can be done cheaply and neatly, but you have to be patient and careful.
I already have something very like the tool in your link, that I bought yonks ago to cut holes in wall tiles and laminate flooring. Not sure if it will expand big enough to clear a 4" dial, plus it's bezel recess. But again, if you set it up and cut the bezel recess FIRST, then you can use the first auger hole in the dash to cut the through hole - if you're careful!

I've kept the plank dash in my Toledo for simplicity and adapted the adjustable (sprint) column to go with it. Though mine is currently modified to accept the Nova instrument cluster, the PCB on this unit is failing fast and new ones are NLA, so I am going back to a more conventional dash array using Triumph instruments and some aftermarket individual warning lights. To that end,I have a Sprint 7000 rpm Tachometer and140 MPH Speedometer plus an aftermarket 2" electronic oil pressure guage and a 4" 3 instrument fuel/water temp/voltmeter from a late Triumph 2000 which matches the font on the other major clocks. On this car, which is driven hard on track, i'm keeping it simple, there is no stereo, no clock, no extra lights, rear foglight, hazard light, reverse light, HRW etc. warning lights will be minimal as well, with only the basic 4, a single indicator repeater, main beam warning, ignition and oil pressure, all in a group between the 2 major dials and all different colours for immediate recognition. The dash will hold only one switch, that being the arming switch for the brake line lock, everything else is on the column. I'm confident that I can drive in this configuration without problems cropping up unawares. But then the car is always thoroughly checked on the ramp before a trackday, even if the last trackday was only a week before!


2 door '73 Toledo with Vauxhall Carlton engine OWF 797M (The Carledo)
Vermillion (and Rust) Sprint Auto EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 40 years and home of Maverick Triumph.PM for more info or quotes.

PostPosted: Thu Nov 02, 2017 3:20 pm 
Future Club member hopefully!
Future Club member hopefully!

Joined: Tue May 06, 2014 3:38 pm
Posts: 149
Location: Canvey Island, Essex
To make the 52 mm, 60 mm & 100 mm diameter holes in the ¼-inch thick, flat MDF board sections that I used for trial-fitting particular instruments in various positions within the dashboard aperture, I drilled a small pilot hole of about 6 mm diameter and used a coping-saw (similar to a fret-saw) to cut out the large circular holes.

One could also use this method to cut all of the large holes in the full-sized concave instrument panel, but it would take a few hours to complete. One would still need to create the rebated recesses for the instrument bezels, but it might be possible to do this first, before bending the full-sized panel and cutting the 52 mm, 60 mm & 100 mm diameter holes.

I wonder whether a cheap hole-saw set like this would be too flimsy:



High quality 16 piece hole saw set for cutting smooth clean accurate holes. All pieces in the set are heat treated enabling them to be suitable for soft and hard wood, plasterboard, plastic and non ferrous metals. All pieces come in a handy blow moulded carry/storage case.

Heat treated teeth For hard and soft woods, plastic, plasterboard and non ferrous metals.

Contains 12 hole saws 19, 22, 25, 32, 38, 44, 51, 64, 76, 89, 102 and 127 mm
6 mm (1/4') and 10 mm (3/8') arbors

Reinforcing plate and hex key.


Nigel A. Skeet

Independent tutor of mathematics, physics, technology & engineering, for secondary, tertiary, further & higher education.

Upgraded 1974 Triumph Toledo 1300 (Toledo / Dolomite HL / Sprint hybrid)

Onetime member + magazine editor & technical editor of Volkswagen Type 2 Owners' Club

PostPosted: Thu Nov 02, 2017 5:29 pm 
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Joined: Wed Jul 22, 2015 11:58 am
Posts: 1110
Location: London
If you want a clean hole, find a right size forstener bit, very clean on mdf.

The bladed adjustable is also clean, but takes time, or the blades break.

Bosch hole saw I find are excellent, but around £16 to £22 each size.

NRW 581W Sprint

On the motorway no one can hear me sing!
Construed as a public service, self preservation in reality.

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