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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.
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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.
The 1'' pulleys without boss vary in a similar way. The left-hand part in this picture is the MME pulley (technically
a part 22), then note the 'moulded' shape to the early two-part MME pulleys, becoming a wide V, then narrow by the
nickel version of around 1915/16. The groove stays fairly consistent or narrows through to the post-war ones on the right. Late-70's
plastic pulleys are wider again.
Variations and oddities
None known
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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 |
, Cast brass, four holes in face, feather key fixing.',300,305,'white')){kind=link}
, Milled brass, no holes in face, feather and tongue key fixing.',300,290,'white')){kind=link}
, Milled brass, no holes in face, tongue key fixing.',300,290,'white')){kind=link}
, Milled brass, three holes in face, tongue key fixing.',300,296,'white')){kind=link}
, Bronzed, cast lead alloy wheel, three holes, tongue key fixing.',337,249,'white')){kind=link}
, Brass, two-part wheel, three holes, tongue key fixing.',300,289,'white')){kind=link}
, Bronzed, two-part wheel, three holes, tongue key fixing.',300,291,'white')){kind=link}
, With boss and set screw, no holes, brass, rims machined flat.',300,295,'white')){kind=link}
, as above with three holes in face.',300,291,'white')){kind=link}
, Thin groove, steel faces nickelled †.',300,281,'white')){kind=link}
, Thin groove, steel faces nickelled †.',300,292,'white')){kind=link}
, As above but U-shaped \'economy\' steel boss †.',300,278,'white')){kind=link}
, Brass faces and boss, deep V groove.',300,312,'white')){kind=link}
, Steel faces enamelled dark blue.',300,298,'white')){kind=link}
, Steel faces enamelled dark blue.',350,289,'white')){kind=link}
, Steel faces enamelled red.',300,295,'white')){kind=link}
, Steel faces enamelled red.',300,301,'white')){kind=link}
, Steel faces enamelled red, with mazac boss.',300,274,'white')){kind=link}
, All brass, post-war stamped \'Meccano\'.',300,289,'white')){kind=link}
, All brass, post-war stamped \'Meccano\'.',300,284,'white')){kind=link}
, Blackened steel (Korean war), brass boss †.',300,289,'white')){kind=link}
, Blackened steel (Korean war), brass boss †.',300,289,'white')){kind=link}
, Silver finish steel, alloy boss.',300,293,'white')){kind=link}
, Silver finish steel, alloy boss.',300,272,'white')){kind=link}
, Matt brass finish.',300,277,'white')){kind=link}
, Matt brass finish.',300,284,'white')){kind=link}
, Moulded yellow plastic (no holes in face), 22 with brass boss.',300,284,'white')){kind=link}
, Moulded yellow plastic (no holes in face), 22 with brass boss.',216,204,'white')){kind=link}
, Moulded yellow plastic, with thicker centre / brass pummel.',288,287,'white')){kind=link}
, Moulded yellow plastic, with thicker centre / brass pummel.',216,201,'white')){kind=link}
, Iridescent.',119,118,'white')){kind=link}
, Iridescent.',117,120,'white')){kind=link}
, Moulded yellow plastic, three holes.',300,277,'white')){kind=link}
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 1 of 2. 
Pops56 (at 4:09pm, Fri 9th Dec, 16) |
I have a strange half one inch pulley with the outer sheave missing the boss is single tapped thight and in place |
Mike Jackson (at 10:35pm, Sun 21st Jul, 13) |
I have a number of these pulleys made from tinplate, unbranded - probably from Ezibuilt, Buz-builder or Lincoln. They are of appalling quality and when used on cranes, the cable splits the two halves and jams against the boss. This never happens with the Binns Rd articles - why not? Is it heavier guage metal or are they soldered? |
David Morgan (at 4:11pm, Wed 28th Sep, 11) |
I have a plastic pulley (22bp) with a boss which is untapped and not drilled for tapping. Is this a special part or an anomaly. |
Michael Conduit (at 2:17pm, Sun 30th May, 10) |
I have a single tapped pulley , one in a huge lot Im converting to collars, though perhaps not this one, which is marked MECCANO IMPORTE D'ANGLETERRE on both sides. |
Michael Conduit (at 2:40pm, Sat 1st May, 10) |
Similar to Douglas, I also have several early pulleys with a tapped and an untapped hole, so we can assume they are not an anomaly. Was this a case of the tra**tion from single to double tapped and the new work instructions took time get across the factory |
Douglas Carson (at 2:33pm, Wed 14th Apr, 10) |
I have come across some 1" pulleys with boss of the early standard boss type, that have one tapped hole and one untapped hole. Is this a known variation? |