Rear wheel bearings part number 11905

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Invicta
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Rear wheel bearings part number 11905

Post by Invicta »

Can anyone please tell me the correct length of the hollow bearing spindle part number 11905 in a 1949 AJS model 18 On stripping the hub of my basket case I found one end of the spindle chewed away, or sheared off , the rollers loose in the hub on one end and the bearing track on the hollow spindle badly cratered. The end looks as though it may have sheared off as it is missing from the under cut where the roller cage fits if that makes sense. New bearings are available from the Vintage Bearing company in Derbyshire . They use the same part number but specify a specific length. I have read that there were several different lengths used and 1949 bikes had a lot of differences from other years . I do not want to order a new bearing set only to find I have the wrong length. My bike has the 7/16" diameter wheel spindle.
uktom77
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Re: Rear wheel bearings part number 11905

Post by uktom77 »

Image
This came out of a 4" cotton reel hub (there was also the narrower wheel that I don't know if the internals also changed for)


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uktom77
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Re: Rear wheel bearings part number 11905

Post by uktom77 »

And mm if it helps
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Rob Harknett
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Re: Rear wheel bearings part number 11905

Post by Rob Harknett »

David, In 1952 AMC introduced a new 6 digit part numbering system. Old pt. no. 11905 became new pt. no. 012837. So as from 1952 you would need to quote new pt. no. 0128537. The club do not appear to stock this part. You may still find old stock bearing the old part number. So the parts found with the new or old part number should fit. BUT, you do have to be sure your bike has the correct rear wheel fitted. You may notice in your parts list, the old number is given also a new 6 digit number.
There should be different lengths for pt. no. old 11905 new 012837. A different length will have a different pt. no.
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ajscomboman
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Re: Rear wheel bearings part number 11905

Post by ajscomboman »

Rob Harknett wrote:David, In 1952 AMC introduced a new 6 digit part numbering system. Old pt. no. 11905 became new pt. no. 012837. So as from 1952 you would need to quote new pt. no. 0128537. The club do not appear to stock this part. You may still find old stock bearing the old part number. So the parts found with the new or old part number should fit. BUT, you do have to be sure your bike has the correct rear wheel fitted. You may notice in your parts list, the old number is given also a new 6 digit number.
There should be different lengths for pt. no. old 11905 new 012837. A different length will have a different pt. no.
Rob 11905 is only suitable for 40's rigid models so anything after that it's a different part and number. I can find no reference to 11905 ever changing to another number and there is no 012837 listed in a 52 spares manual rear wheel section. We cross reference most parts with later numbers as does AMC Classic Spares and neither of us list any other number for 11905

Bottom line is we do stock 11905 as a cartridge replacement to replace the fragile taper set up.
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Rob Harknett
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Re: Rear wheel bearings part number 11905

Post by Rob Harknett »

ajscomboman wrote:
Rob Harknett wrote:David, In 1952 AMC introduced a new 6 digit part numbering system. Old pt. no. 11905 became new pt. no. 012837. So as from 1952 you would need to quote new pt. no. 0128537. The club do not appear to stock this part. You may still find old stock bearing the old part number. So the parts found with the new or old part number should fit. BUT, you do have to be sure your bike has the correct rear wheel fitted. You may notice in your parts list, the old number is given also a new 6 digit number.
There should be different lengths for pt. no. old 11905 new 012837. A different length will have a different pt. no.
Rob 11905 is only suitable for 40's rigid models so anything after that it's a different part and number. I can find no reference to 11905 ever changing to another number and there is no 012837 listed in a 52 spares manual rear wheel section. We cross reference most parts with later numbers as does AMC Classic Spares and neither of us list any other number for 11905

Bottom line is we do stock 11905 as a cartridge replacement to replace the fragile taper set up.
Rob, I wondered if there was a cartridge replacement available.
As the club & AMC Classic spares use only old pt. no. 11905, may I tell you of my habit. When ever I see an old part number I always check if it has a new art number. Many times people have looked for parts via an old part number, the club will say sorry we do not have it. In fact the club have often had the parts, but to find them the buyer would need to order using the new part number. I have put a file starting 000 in the archives so it appears at the top of the spare parts books list.
http://archives.jampot.dk/book/Spares_l ... ements.pdf
Its the old to new 1954 list to which I have added 55 & 56 supplements these supplements appear first. You will find in this factory literature, 11905 has new pt. no. 012837.
If you look in the 1949 parts list Illustrations, you will see only the old part number 11905, look in the parts listing you will then see it also states new pt. no. 012837. This new part number is also listed in the 1948 parts books.
Ashampoo_Snap_22 October 2020_19h21m16s_002_.jpg
Ashampoo_Snap_22 October 2020_18h43m44s_001_.jpg
So as we have the cartridge replacement for 11905, it should also be OK for 012837. 11905 / 012837 appears to be up to 1949 only. Rob The bike in question is 1949.
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Last edited by Rob Harknett on Thu Oct 22, 2020 7:57 pm, edited 1 time in total.
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ajscomboman
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Re: Rear wheel bearings part number 11905

Post by ajscomboman »

Rob why did you mention 1952 then? I went through all of the 52 manuals and the 1950 ones. I'll up date the part description even though it already states all 40's rigid models.
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Rob Harknett
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Re: Rear wheel bearings part number 11905

Post by Rob Harknett »

ajscomboman wrote:Rob why did you mention 1952 then? I went through all of them and the 1950 books. I'll up date the part description even though it already states all 40's rigid models.
I also wondered why you mentioned 1952. Bit of miss understanding Rob. I just stated, it seems 1952 was when you had to order by the new part number. So it is pre 1952 parts lists you need to check for a new part number. Just a reminder really, that the owner of this 1949 bike may be looking for other parts, so he will need to check if the part has a new part number. When I checked club spares about 7 years ago, I discovered about 300 + parts were stocked by the club under new part numbers. If a customer asked for the part quoting the old part no. It would not be found, so told sorry don't have that part. Jim was always passing customers on to me that had quoted old numbers for help, Gary has not passed on so many. Quite often I found the parts they wanted were in stock under the new pt. no. Perhaps Gary does not always recognise an old pt. no. Basically, a new AMC pt. no. will have a 6 digit numerical pt. no.
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Rob Harknett
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Re: Rear wheel bearings part number 11905

Post by Rob Harknett »

ajscomboman wrote:Rob why did you mention 1952 then? I went through all of the 52 manuals and the 1950 ones. I'll up date the part description even though it already states all 40's rigid models.
The description would be about right Rob, that new pt. no. for 11905 = 012837 only seems to appear in 1948/49 parts lists.
Invicta
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Re: Rear wheel bearings part number 11905

Post by Invicta »

Thank you for all of your help gents.
I now have another problem. The width of the cotton reel hub? I want to order new rims from the Devon Rim company but need to specify the width of the cotton reel ,ie 4" or 3.1" Mine is 3.27" across the outside width of the flanges at their widest part and 4.380" across the centre of the hub. The only 4" measurement is if I take off the width of the speedometer drive on the right hand side. From the picture on the Devon rim Co it appears that they are asking for the measurement across the flanges. Could I have some sort of mongrel hub I wonder.
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