I plan on ordering a railroad reference ruler. Need suggestions for the best one for O scale. Must be durable and precise
Use whatever grade of standard ruler that you like; inches not centimeters. O gauge is 1/4 inch to the foot. The ratio is 1:48.
Micro-Mark has one...
Mascot Precision Tools also makes a 12" steel multi-scale ruler...available at a variety of sources, including LHS's.
Doug B's suggestion, though, for the use of an architect's scale at 1/4" to the foot is also practical.
I highly recommend a quality steel rule, regardless. My scale rules suffer a fair amount of 'unmeasured' use....getting buried under piles of this-and-that on the workbench, falling on the concrete floor, being used simply for a blade guide on a straight cut, etc., etc., etc.. Plastic or wood rules with scales simply printed on the surface are going to show wear a lot faster....even though they may be less costly initially.
It's one of those essential tools at the hobby bench.....go for quality.
IMHO, of course....
Any "Standard" (only in the US, now - so it isn't really a "standard") ruler is a N. American O-scale (1:48) ruler, as 1/4" - 1 foot. Even the free ones. However, they don't help you in Britain or Europe, where O "scales" vary from 1:43 to 1:43.5 to 1:45, maybe more, to my understanding.
A metal one is better, or at least prettier, but I lost mine years ago and just use an old wooden give-away ruler for building everything. Still 1/4" to the foot.
My wife's old programmer's straight edge gets a lot of use as a train box flap opener to avoid bent flaps! LOL! PS: I also have a nice multi-scale train straight edge.
Tried an O scale ruler but it's really too small to be useful at only a quarter inch long. Maybe an O scale yardstick would be better.