Printed from www.nzmeccano.com
Part 21: 1½'' pulley wheel
|21||Pulley wheel, 1½''||1901||-||4||4||2||N°8||Part 11 until 1909|
pre-war above and post-war below
All images on this site are copyright. This particular image belongs to the
webmasters, and you may copy it for your personal use, or for a non-
commercial website - if you credit the source. All other rights reserved.
The partsThe 1½'' pulley has been a part of the Meccano system from the very beginning, but often sadly ignored. It was originally part number 11, renumbered to 21 in 1909. The flanged wheel (initially 9, then 20), and the 1'' pulley (initially 10, later 22) were always used far more in models and outfits.
Although it gained a tyre at the same time as the other pulleys, the tyre was never included in any outfits and thus remains scarce. Not until 1978 did it gain equal footing in outfits with the 1'' pulley, which explains why they are so common in the very late finishes.
Chronological variationsThere were three main developments in the 1½'' pulley design. The very first MME and Meccano parts went through a bewildering sequence of styles with various numbers of holes. These were cast or milled solid brass, with a groove cut in the rim. Most have milled recesses in each side, making them recognisable as pulleys.
With the advent of the "Meccano patent" boss in 1911, the pulley along with several other parts changed to a two-part pressing with separate boss. The two sides are held together by (normally four) smaller holes opened out in the style of an eyelet through larger holes in the opposite face. Again, many varieties are known, as can be seen from the table below. The finish is most often brass although there are nickel variants.
Somewhere around 1920, the 'normal' design appeared, where the part was made from two identical pressings, each with two eyelets fitting into the other face. Both faces also have four plain holes, making a total of eight standard Meccano-sized holes round the pulley. This design subsequently went through all the usual phases: single and double-tapped brass, enamelled blue and red, blackened steel during the brass shortage of the Korean war, and then matt brass, light and dark yellow (rare), dark blue in 1978, and iridescent in 1979.
Variations and odditiesJohn Bader has pointed out a variation on the standard 1½'' pulley, shown as 23.br3b below, which appears the same as the single-tapped eight-hole version. In fact the four holes that are peened over are the same, but the four additional drilled holes are closer to the edge of the pulley, and so aren't at standard half-inch spacing from the boss. Is this a mistake or a common variant?
Dealer spare parts boxes
Individual part numbersPart numbers for the parts on this page are as follows: Unique part numbers
For identification, each variation has been given a suffix to the main Meccano part number. These suffixes consist of a two-character code for the colour, and if there are many variations, a further number and sometimes letter code to identify each variation. See the bottom of the 'Parts' page for further details.
You don't need to worry what the codes are, just click on any one for a photograph.
The button above turns on and off the display of DMS numbers (where they are known). The DMS (Development of the Meccano System, Hauton and Hindemarsh) published in 1972 and added to in 75 and 82, suggested part numbers for every variation of every Meccano part. These numbers aren't perfect, but they are recognised and also referenced in the EMP (Encyclopedia of Meccano Parts, Don Blakeborough).
|Cast brass, four holes, feather key slot, U-shaped groove||01||.mm|
|Cast brass, six holes, feather and tongue key slot||07||.mm1|
|Cast brass, six holes, tongue key slot||07||.mm1a|
|Milled brass, five large holes, tongue key slot||09||.mm2|
|Milled brass, five smaller holes, tongue key slot||??||.mm2a|
|Milled brass, four large holes, tongue key slot||??||.mm2b|
|Milled brass, four large and four small holes, solid face, tongue key slot||??||.mm2c|
|Brass two-part pressed wheel, 'Meccano patent' boss, 4 holes, tongue key slot||11||.mm3|
|Brass, '1911 patent' boss, 4 holes, tongue key slot||11||.mm4|
|Brass, '1911 patent' boss single tapped, 6 holes||11||.br1b|
|Brass, 2 holes, standard boss single-tapped||12||.br1|
|Brass, as above but 4 holes, V-shaped groove from now on||12||.br2|
|Nickel plated steel discs, 4 holes||15||.ni|
|Nickel plated steel discs, 6 holes||??||.ni1|
|Brass with 6 holes, as above||??||.br2a|
|Brass, four standard holes, four small holes||18||.br2b|
|Brass, eight standard holes, single tapped||??||.br3|
|Brass, eight standard holes (four further out), single tapped||??||.br3b|
|Brass, eight standard holes, as above but double tapped||27||.br4|
|Brass, eight standard holes, two sides symmetrical||30s?||.br5|
|Zinc plated, otherwise as above with steel faces||??||.zn|
|Blue, otherwise as above with steel faces||34||.nb|
|Red, otherwise as above||37||.re|
|Brass, post-war stamping||48||.br|
|Blackened steel 'economy' version of above ||51||.bs|
|Matt brass finished||71||.mb|
Please send us pictures of missing parts! Hints and tips for pictures
Take a picture of the part in very good light, preferably on a plain yellow background, without a flash but with a tripod.
Ideally, trim the picture to about 150 pixels per inch of the Meccano part (unless the part is particularly big or small), save it as a reasonably good quality jpg file with a filename of exactly the part number, for example 19b.ni1.jpg, and email it to us by clicking on 'Contact us' at the top of the page. Thanks!
- A greyed-out box shows that no part exists for that colour combination.
- Part number codes with a green background have an attached picture of the part, just click once on the code to show a photograph of that part in a separate window.
- Parts marked "" were temporary or economy parts, or existed only within specific themed outfits. The previous part continued throughout or afterwards.
Jason (at 12:17pm, Wed 16th Jul, 08)
Can anybody shed any light on the above? Was it a Binns Road exercise in cost cutting and, if so, why do these parts appear to be so scarce in silver?
Jason (at 2:09pm, Sat 5th Jul, 08)
I have silver versions from a late 1960s outfit which I think might be steel. I have never seen any others. I also have steel examples of part 22 which, again, are from the late 1960s and are the only ones which I have ever come across!