Where can I get an edge scribe that marks a centre line around the edge of a piece of steel like in the pics below?
Cheers.
Cheers.
Edge Scribe? (Pics)
- Thread starter Matthew.Passmore
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Have you tried a engineering supplier such as Cromwell Tools, Buck & Hickman, Axminster et al. There are lots about
How often do you intend to use it?
If one off or very occasionally then how about this; Grind an old hacksaw blade to a chisel edge, then shim up to the level you want. Check the thickness of shimming with micrometer/caliper then tape down to your surface.
Not seen the tooling pictured but guess it don't come cheap.
If one off or very occasionally then how about this; Grind an old hacksaw blade to a chisel edge, then shim up to the level you want. Check the thickness of shimming with micrometer/caliper then tape down to your surface.
Not seen the tooling pictured but guess it don't come cheap.
Use a drill bit of the same thickness as your piece of steel - the point is in the middle (I hope!!)
That looks very much like an end mill bit fitted into some sort of clamping device which allows it to be set at a given height. Try a local engineering tool supplies company or, if you're really lucky, you may know someone who works for an engineering company who can let you have a blunt one. It would be fine for just scribing the edge of metal plate.
Hope this helps
Martin
Hope this helps
Martin
I think you are after a Vernier Height Gauge but at over £50 I'd tend to use a drill bit the same size as the thickness of steel - you can check the line is in the centre by rotating the bit and marking again, one line you've found the centre, two parallel lines and you need to get a higher quality drill bit.
James
James
A friend of mine uses something similar to this:http://www.virtualvillage.co.uk/ite...baseuk&utm_medium=shopping&CAWELAID=190620784
On the edge of the steel paint some engineeers blue,measure the thickness of the steel,say its 4mm,set the venier to 2mm and scribe the center line.Easy.Or have look for things called 'odd legg calipers'.http://cgi.ebay.co.uk/ODD-LEG-CALIP...1QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247
On the edge of the steel paint some engineeers blue,measure the thickness of the steel,say its 4mm,set the venier to 2mm and scribe the center line.Easy.Or have look for things called 'odd legg calipers'.http://cgi.ebay.co.uk/ODD-LEG-CALIP...1QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247
I bought mine at a knife supplies place (forget which one) but I know a knifemaker who made one from an engine valve. Just sharpen the edge of the valve and chuck it into a drill press.
Any lash-up that you can cobble together will put a mark on the edge....
... all you have to do is to turn it over and repeat the exercise to give you two lines equidistant from the centre-line, The more accurate you become, the closer the lines will appear until they merge into one.
ATB
Ogri the trog
... all you have to do is to turn it over and repeat the exercise to give you two lines equidistant from the centre-line, The more accurate you become, the closer the lines will appear until they merge into one.
ATB
Ogri the trog
I use a carbide engineers scribe from B&Q that cost about a fiver, it looks like a dentists instrument.
Could you not just use a marking gauge like joiners use?
Pretty sure mine would do the job on a bit of metal although I have put a tungsten pin (well its actually a thoriated tungsten electrode out of a TIG welder) into it cos its harder than a normal steel pin.
Pretty sure mine would do the job on a bit of metal although I have put a tungsten pin (well its actually a thoriated tungsten electrode out of a TIG welder) into it cos its harder than a normal steel pin.
Or you could forget about getting the line in the dead centre altogether and make something up that will provide you with a pair of parallel lines about 0.75mm apart. The simple way if you are using ground flat stock, is to take a bit of the stock, grind an angle on it, harden it and sharpen. Drag the blade past it one way for one mark, flip over and drag past again to get a pair of lines. Grind the cutting edge to the lines before hardening, then you have a little more to remove after hardening to allow for de-carb.
That is how I have been doing it.
That is how I have been doing it.
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