You must preserve your layout work (reference edges) or you will lose accuracy of the blade.
Yip ; A stanley knife blade ,held perpendicularish to the surface , used as a scaper , can getim to a microfarad . Viewed end on , in good light . Bit harsh of the skin, but .
As a kid Id found a discarded 3 edged ' bearing scraper ' . Used to ' hand finish ' poured or undersized bearings . Whitemetal , to fractions of a thou. So de krect mental proach elps .
There still around. Off the Shelf . Some ships & things have handsome bearings still . SO , gettingem inside a thou is nosewet , if you know whata thou is .
Those EDGE LINES ( etc ) are the Datums , Base Lines , and things like that . So the accuracy off THEIR positioning / Placement , is where the cat gets the cream .
Some off us might start in light soft pencil , then Vineer or good clean ruler maybe with another set vertical to edge , and other creative DEFINITIVE marking placers .
S SHARP 6 H or 4 H pencil , in a steady hand , can actually ' catch 1/10 th. m.m. . which is 63.5 micrometres . whatever they are . call it 63 or 64 , should close it .
![Hugh %^@](https://stunthanger.com/smf/Smileys/classic/icon_2.gif)
( practise + S H A R P 6H , draw twa parrallel at 1 m.m. exact . Split . ( Two Parts ) Split Again ( Thats four parts ) then two lines twixt . staggered - overlappeds . Youve drawn ten , or is that eleven . IN a milimeter .
No Sweat . Practised at that , you can visualise ' the split ' and catch fractions of m.m. , when marking out . the Hard Lead Tip will ' just ' give a lead , for a fine line ballpoint , to lay over . A few differant colours
If your doing multitudeinous longitudeinal cuts ( back to lines ) and ' scrapes , to deedonem . Throwing the Virneer on it occasionally . Tecnique X strokes , rotate ditto that ( blade ) then BALANCE is Equal as MASS
is exactly equal .
Sa can do in 1 1/2 Hr. if ' set up ( right tools out & bench clear ) with a clear head , and a clear eye . Tools ' weight ' or balance a factor too . Sometimes you tape your thumb & forefinger , so as to not wear through them .
Commin along well , there . But thats just the flat part , the airfoils Next .