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#1
02-05-12, 22:45
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Steve
I have checked, and the thread on the bottom of the column is 12 tpi, which is BSW -( British coarse) which will be 1 thread different than UNC.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... Last edited by Lynn Eades; 02-05-12 at 22:59. Reason: clarity 
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#3
03-05-12, 09:03
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Quote:
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1967 Land Rover Plant Repair Vehicle 1941 Matchless G3L 194? Wiles Junior Trailer 1941 Morris Commercial CS8
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#4
03-05-12, 11:22
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Alex / Stephen
Alex,
 I was trying to make it easy for Stephen, who, being from the U.S.of A.,is probably not very familiar with British thread forms.While you are being so precise, it would be more accurate to say that BSC threads were used in some old leaky motorcycles.  How is that carrier coming together? Stephen, as has been pointed out, It is referred to as Whitworth, or British Standard Whitworth. 1/2" is the problem size as it is 12 TPI where as 1/2" UNC has 13 TPI. The other common sizes 1/4", 5/16", 3/8", and 7/16" are the same TPI as their counterparts (BSW and UNC) This is not the case with the fine threads (BSF and UNF)
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions....
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#5
03-05-12, 20:08
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Progress is slow
Lynn,
I have one of the newer Triumph Bonnevilles. No Whitworth threads but it does leak. Does that count?  Thank you all for the info. I am not sure where I would be without all of you. Lynn, thank you for asking about my progress. I did have an exciting weekend just past as I put the track back on after about a 1-1/2. I just need to get the engine running right. Some seats and armor might be a good Idea too. Stephen DeMocko ’44 MKII So Cal, USA
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#6
04-05-12, 17:11
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pic of threads
I dont know guys, 4-1/2 threads over 1/4" sure looks like 18 pitch to me. A forum friend (Thanks Mike) says the nut from the bottom of the steering column goes on ok. I have one coming from Brian A. (thanks Brian). Maybe its 20 but it seems less as it was a bit hard to get my calipers in there especally as i use them as scribs sometimes. Ends are warn a bit.
Stephen DeMocko '44 MKII So Cal, USA Last edited by SDeMocko; 04-05-12 at 17:27.
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#7
04-05-12, 22:01
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Stephen
Your last post caused me to look at another column that I have, and that one is 3/4" dia. x 16 tpi, which is UNF thread.
If you are buying a bearing for here be careful with the size. The ring on the floor and the inner diameter can be different sizes. The imperial self alingning bearing is difficult to find and can be expensive. I have one that so far, I have been un able to remove from the column.  The Australian carriers used metric sizing and use a cheap and easy to get 6304? (check) bearing.  This leads me to mention that I have found on Canadian carriers, that there are bolts which are hybrids (I am talking original bolts) Some are UNF threads, that fit the British spanners, and some are BSF that fit American sized spanners. I'd be interested to hear comments from others on this.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions....
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Hybrid Mode
