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Part 22/22a: 1'' pulley with/without boss

 
221'' pulley with boss 01-10108N°00Key fixing until 1912
22a1'' pulley without boss 13-15156N°5
A selection of 1'' pulleys, pre-war above, post-war below
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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.

Differing widths of 1'' pulleys with boss, 20's, 30's, 50's, 70's
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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).

Differing widths of 1'' pulleys without boss
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webmasters, and you may copy it for your personal use, or for a non-
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Loading picture 22aedgeon 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
22a's from the 60's, and 22's from the 50's
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Dealer spare parts boxes

Individual part numbers

Part 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).

More about bosses More about stampings More about paint colours
Descriptionfrom22
22a
Cast brass, no holes in face, feather key fixing01.mm 
Cast brass, four holes in face, feather key fixing??.mm1 
Milled brass, no holes in face, feather and tongue key fixing07.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 fixing07.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 flat12.br1.br1
as above with three holes in face12 .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 groove27.br2 
Steel faces enamelled dark blue34.nb.nb
Steel faces enamelled red37.re.re
Steel faces enamelled red, with mazac boss40?.re1 
All brass, post-war stamped 'Meccano'45.br.br
Blackened steel (Korean war), brass boss †51.bs.bs
Silver finish steel, alloy boss60s?.si.si
Matt brass finish71.mb.mb
Moulded yellow plastic (no holes in face), 22 with brass boss78.ye.ye
Moulded yellow plastic, with thicker centre / brass pummel79.ye1.ye1
Iridescent79.ir.ir
Moulded yellow plastic, three holes??.ye3 
ALLALL

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!

Further information

Total number of messages on this page: 12.  This is page 1 of 2.   Next

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
Buffer headlight or stamping error

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.
I will put a picture in my gallery.

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?


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