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Part 22/22a: 1'' pulley with/without boss
22 | 1'' pulley with boss | 01 | - | 10 | 10 | 8 | N°00 | Key fixing until 1912 |
22a | 1'' pulley without boss | 13 | - | 15 | 15 | 6 | N°5 |
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The parts
Initially part number 10 (until 1904), the 1'' pulley was a single part in the days of MME. The feather key fixing technique meant that the pulley could be fixed to the axle or not depending upon the orientation of the key. With the advent of the boss in 1912, the pulley became much thicker, and so the part 22a was designed to fulfil the job of a 'loose' pulley.Generally, the two parts developed in parallel, as you can see by the matching pairs in the photograph to the right. Most variations applied to both types, after 1913. There are a small number of exceptions as you will see in the table at the bottom of the page.
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.
Chronological variations
After the usual pile of different MME and early Meccano parts (pre-1912), there was not much change in the design of either part. The only difference is the groove width. This tends to start off quite wide (from 5/32'' to 3/16'' for the 'deep groove' version, 4-5mm). From the 20's right through to the early 70's, the thickness of both varieties dropped back to around 9/64'' (under 4mm). The late 70's yellow plastic varieties are thicker again, back over 4mm. You can see the four 1'' pulleys with boss (left is early 20's wide, middle two are 30's and 50's, right-hand is yellow plastic and wide again).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.
Variations and oddities
None knownAll 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.
Dealer spare parts boxes
Individual part numbers
Part numbers for the parts on this page are as follows: Unique part numbersFor 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).
Description | from | 22 | 22a |
---|---|---|---|
Cast brass, no holes in face, feather key fixing | 01 | .mm | |
Cast brass, four holes in face, feather key fixing | ?? | .mm1 | |
Milled brass, no holes in face, feather and tongue key fixing | 07 | .mm2 | |
Milled brass, no holes in face, tongue key fixing | ?? | .mm2a | |
Milled brass, three holes in face, tongue key fixing | ?? | .mm2b | |
Bronzed, cast lead alloy wheel, three holes, tongue key fixing | ?? | .mm4 | |
Brass, two-part wheel, three holes, tongue key fixing | 07 | .mm3 | |
Black, two-part wheel, three holes, tongue key fixing | ?? | .mm3a | |
Bronzed, two-part wheel, three holes, tongue key fixing | ?? | .mm3b | |
With boss and set screw, no holes, brass, rims machined flat | 12 | .br1 | .br1 |
as above with three holes in face | 12 | .br1a | |
Thin groove, steel faces nickelled | 15 | .ni | .ni |
As above but U-shaped 'economy' steel boss | 16 | .ni1 | |
Brass faces and boss, deep V groove | 27 | .br2 | |
Steel faces enamelled dark blue | 34 | .nb | .nb |
Steel faces enamelled red | 37 | .re | .re |
Steel faces enamelled red, with mazac boss | 40? | .re1 | |
All brass, post-war stamped 'Meccano' | 45 | .br | .br |
Blackened steel (Korean war), brass boss | 51 | .bs | .bs |
Silver finish steel, alloy boss | 60s? | .si | .si |
Matt brass finish | 71 | .mb | .mb |
Moulded yellow plastic (no holes in face), 22 with brass boss | 78 | .ye | .ye |
Moulded yellow plastic, with thicker centre / brass pummel | 79 | .ye1 | .ye1 |
Iridescent | 79 | .ir | .ir |
Moulded yellow plastic, three holes | ?? | .ye3 | |
ALL | ALL |
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.
Further information
Total number of messages on this page: 12. This is page 2 of 2.
john smith (at 7:58am, Tue 13th Apr, 10) |
I found a pulley similar to br1 or br2 but with a shallow V groove. It has a single screw with a groove width of 3mm and has meccano and fabrique en anglaterre stamped on it. |
Antoni Gual (at 7:10pm, Thu 28th Jan, 10) |
I got some 1" pulleys steel faces black enameled with my Meccano (made in Spain) back in 1962. I can send pictures of the single one remaining. |
Pepín (at 2:55am, Thu 7th May, 09) |
I just found my yellow pulley in the 1995 spare parts catalog. It is called part " 22bp " with nr 036551. |
Pepín (at 11:11am, Thu 23rd Apr, 09) |
I´ve got a french pulley, (part 22a??) dated 1994. Is a moulded yellow plastic pulley, with thicker centre (.ye1) but with three "radius" (not holes). The origin is a small bike set. I could scan and send the instruction page. |
Neville Bond (at 3:22am, Fri 27th Feb, 09) |
22.ye3 has the marking (C) MECCANO 1995 on all my examples. I suppose that answers the year of introduction question |
Ed Barclay (at 9:01am, Sat 29th Dec, 07) |
Charles: I think that 22a.ye2 came into being at the same time as 22.ye1 as the extra thickness would be needed for new inserted boss type 22.ye1. I feel that the space for 22a.ye1 should actually be greyed out. |