| Archive for The Unofficial Mamod and Other Steam Forum The Original Unofficial Toy Steam Forum Established 2006 The biggest, most popular steam forum around! Accept NO imitations! We have a growing community of regular posting members who chat about all aspects of toy and model steam. |
| Cranko |
right angle drive gear set!!!!!!!!!!!!!!!!!!I'm looking for a set of right angle gears which are smaller in diameter than 12mm. Moose suggested meccano but the smallest set I have there is 19 mm. Ratio needs to be close to 1''1. As there will be some torque here they really need to be brass or similar n not plastic.
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| Cedge |
Cranko...
Try: http://www.smallparts.com/products/descriptions/gbb.cfm or.... http://www.smallparts.com/products/descriptions/gbm.cfm or.... http://bostongear.com/products/open/miter.html# Steve |
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| CJW |
TRY HERE http://www.ema-models.co.uk | ||||||
| mc_mc |
I really hate it when they start quoting dimensions using decimal fractions of an inch. e.g. 0.688 inches Why can't they just use metric and quote everything in mm 
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| Cedge |
I really hate it when they start quoting metric dimensions using everything in mm. e.g. 750mm Why can't they just use decimal fractions of an inch and quote everything in imperical measure. 
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| IndianaRog |
Steve, you beat me to it
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| Griffin |
I use both imperial and metric when measuring, and I can see the argument for both sides, but I have to admit I always revert to metric when something calls for precise measuring Just my personal preference
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| Cranko |
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| Steve_S |
Precisely!
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| Mister Occlusion |
metric just makes sense, though. Nice and logical, everything in a factor of ten. Base units based upon some standard natural property of the world rather than the length of some dead king's forearm, etc.. 
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| IndianaRog |
20+ years ago in the US there was a concerted effort in the schools to bring us into the mainstream of a metric world kicking and screaming. Our cars now have mph AND kph (though MPH is the dominant one), our thermometers have both Farenheit and Centigrade scales, our rulers are printed in both metric and "English" as we refer to Imperial.
BUT, outside of the engineering world where it does in fact make good sense, metrification has simply never been embraced by the general public. Ask most any American what the temp is and you will get a Farenheit response (88 F at the moment here by the way). Ask how far from point A to point B and Mapquest online mapping system will give you miles not kilometers. Somehow 2 liter pop bottles have made an inroad, but most liquids are still sold as ounces, pints, quarts and gallons. And we buy our meat by the pound. And on and on it goes. You can lead a horse to water, stick his head in it...hold it down for a bit...but we're a damn stubborn lot and won't take a drink. I must admit I enjoy being part of the "resistance movement" that seemed to halt metrification (for our own good)...dead in it's tracks. As they say, give them an inch and they'll take a mile. Rog |
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| Mister Occlusion |
It's still a mishmosh here, decades *after* converting. Same thing with the speedos and thermometers. I can function with inches, but not miles, and F? Can't comprehend that at all when Celsius makes so much sense (water freezes at 0 and boils at 100: I know where I stand).
...last month I saw a 3Litre (plastic) Coke bottle in an antique store... I thought "are you serious?"
I suppose as far as collectibles go, it's a cheap thing to get into. Doubt the insurance would cover you if your collection accidently got recycled though. ..yes I tend to go off on tangents. I like tangents. |
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| Mamodman123 |
We still use MPH here for cars and road signs! Having it as KMH would just be wrong!
But measurements in metric is a lot easier! Everything is in 10's! |
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| IndianaRog |
ahhhh Mr. O...you have one foot on the dark side and one foot on the light side!!! One of our members mentioned to me that plywood is still sold in 4 foot x 8 foot panels in the UK, but the thickness is given as millimeters. That does seem a cocked up system!!!
I guess metric or English is driven in part by how one was schooled in it and how they had to apply it (or not) in adult life. Metric is definitely "logical"...but not all folks like being "logical"!!!! Funny, but I own an American (Chevy) pickup truck which requires I have a set of English measure tools to work on it. I also own a Japanese (Honda) motorcycle which is 100% metric...another set of tools must be maintained. This fence sitting re: measurement systems does come at a cost
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| Cranko |
A mechanic sure dose have a heap of tools these days 
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| tmuir |
A recent EU law was going soon make it illegal to sell anything that imperial measurements on it.
So selling a 1/8 drill bit or bolt was going to become illegal in the EU 
Thankfully after many irate letters from model engineers, peole who restore vintage machinary and some people with just common sense they have decided not to implement that law. Obviously it was though up by someone who has spent their whole life behind a desk shuffling paper and never picked up a spanner. I prefer working in metric but if I lived in the EU I would of been one of the angry letter writers too, I've never heard of anything so daft as passing a law that would make a ruler with inches on it illegal.
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| Mister Occlusion |
And then there are times when neither the imperial nor metric wrench fit the thing quite right.
My other favorite peev is how next to no one outside of the electrical industry has admitted to the technical superiority of the Robertson screw head. Phillips is atrocious, and don't even get me started on that useless thing known as TorX, which was seemingly invented for the sole purpose of forcing people to buy a dozen different bits..Never seen a more easily stripped head in my life. |
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| Mister Occlusion |
I can just see some clever fellow remarking the imperial parts into fractions of a millimetre. |
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| flywheel61 |
We changed everything in OZ to metric in 1966, I've got used to most of it but somehow still do my large measuring in inches & feet. Everything else, liquid, weight, small measurements and distance I do in metric.
I think the imperial bit comes from building my own house i nthe late 70's early 80's. Cheers
Chris |
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| Cranko |
I believe any new equipment built in NZ is supposed to be held together with metric threads by Law 
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| Stilldrillin |
I retired from the engineering game last year.
For the previous 46+ yrs, all components I made, were in imperial measure. (Inches, tolerances in thous). All accurate holes drilled in these components were in metric measure. (Millimeter, Tolerances in microns). Crazy!
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| Graham-Jilly |
yep its a crazy world lol | ||||||
| Cranko |
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| Stilldrillin |
[/quote]I thought number drills were used in the UK for accurate holes [/quote]
Depends what size of holes you need!
The accurate holes were for interference fit carbide buttons. (Which looked like bullets). I had to produce 10, 12, 14, 16mm. nominal size holes, to an accuracy of 3 microns. (Micron= 1,000 of millimeter). The holes were then graded into 5 "bands" of size above nominal size. The largest allowed was + 10 mic. Sounds complicated? It was often!
www.Bulroc.com |
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| Cranko |
that would be very nearly inpossible would it not
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| Stilldrillin |
I used to say it was "alchemy". When holes have to be produced to such close tolerances in heat treated steel, strange things happen.
Triangular holes. Tapered, large top, small bottom. Small top, large bottom. Barrel shape. Wonderful feeling when things were going right, and you were producing the correct grade parallel holes, time after time. It never lasted for long though! 
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