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Crankshaft EN16B? #362030
03/09/11 7:39 am
03/09/11 7:39 am
Joined: Feb 2009
Posts: 66
Kansas City
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toreador Offline OP
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Kansas City
I am a little confused by this crankshaft I got with my old 650 project. It's a later one piece crankshaft for a twin, and the only markings I could find on it are EN16B. I can't seem to find this in my parts books. The only 2 things I could find online are either what is listed for a 1959 Bonneville (which my 1959 parts book does not confirm, but this website says it was http://www.classic-british-motorcycles.com/1959-triumph-bonneville.html) or later 70's Triumphs, which the only reference I could find was for a 1975 Triumph trident with that part number on a crank (which it cannot be!). Anyone have any more information or ideas about it?


1951 Triumph sprung hub 6T bitsa, 52 motor with a 1 piece crank. (it's a 51, 52, 53, 54,...)
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Re: Crankshaft EN16B? [Re: toreador] #362034
03/09/11 8:24 am
03/09/11 8:24 am
Joined: Jul 2009
Posts: 3,549
Vic. Australia
P
Pete R - R.I.P. Offline
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Pete R - R.I.P.  Offline
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Vic. Australia
EN16B is a grade of manganese-molybdenum alloy steel.I don't think this has anything to do with part numbers.

Re: Crankshaft EN16B? [Re: toreador] #362104
03/09/11 5:49 pm
03/09/11 5:49 pm
Joined: Oct 2003
Posts: 11,167
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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North Georgia, USA
I agree with Pete. I believe the "EN" is a English or European alloy steel designation. Triumph was probably experimenting with several alloys and marked the cranks in case they started breaking in whopping big numbers 4 years later.


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
Re: Crankshaft EN16B? [Re: toreador] #362111
03/09/11 6:14 pm
03/09/11 6:14 pm
Joined: Feb 2008
Posts: 4,253
New Jersey USA
Tridentman Online content

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New Jersey USA
EN= European Number(to paraphrase the German).
Introduced in 1988 to replace the previous national (UK, German etc) designations for steel alloys.
HTH

Re: Crankshaft EN16B? [Re: toreador] #362112
03/09/11 6:15 pm
03/09/11 6:15 pm
Joined: Feb 2009
Posts: 66
Kansas City
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toreador Offline OP
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Interesting. That would make sense, and kind of falls in line with the article.

Any idea on what year or years of crank this may be? It's one piece, the 2 timing marks, threaded both ends. I can't find any other identifying marks on it.



1951 Triumph sprung hub 6T bitsa, 52 motor with a 1 piece crank. (it's a 51, 52, 53, 54,...)
Re: Crankshaft EN16B? [Re: toreador] #362118
03/09/11 6:38 pm
03/09/11 6:38 pm
Joined: Jan 2004
Posts: 3,646
ca, us
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DMadigan Offline
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ca, us
1988? My '71 BSA parts book lists certain bolts and other pieces as EN16, EN24, et cetera. Perhaps the UK was ahead of its time?

Re: Crankshaft EN16B? [Re: toreador] #362122
03/09/11 6:57 pm
03/09/11 6:57 pm
Joined: Feb 2009
Posts: 66
Kansas City
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toreador Offline OP
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Kansas City
And that 1976 crank in the triple called an en16b, so maybe it started rather early.


1951 Triumph sprung hub 6T bitsa, 52 motor with a 1 piece crank. (it's a 51, 52, 53, 54,...)
Re: Crankshaft EN16B? [Re: toreador] #362161
03/09/11 10:20 pm
03/09/11 10:20 pm
Joined: Sep 2004
Posts: 269
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EWebster Offline
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Posts: 269
Emergency Number = WWII

Re: Crankshaft EN16B? [Re: toreador] #362178
03/09/11 11:32 pm
03/09/11 11:32 pm
Joined: Mar 2005
Posts: 10,084
Boston, Massachusetts
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John Healy Online content

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Posts: 10,084
Boston, Massachusetts
Quote:
Emergency Number = WWII


For this series of steel, yes!

If you check a Machinists Handbook of the WWII era, you will find reference to the EN (Emergency Numbers) and the equivalent SAE numbers.

But Trident man is right too, they homologated European steel numbers into a system that looked a lot like the SAE system and they used the prefix EN.

SAE numbers and the earlier EN # system.
http://www.ambhe.com/technical_info/grades%20of%20Rounds.htm
and an other:

http://www.edi.com.tw/MaterialCode.php?T=SteelRange

extensive list of the BS970 list of EN numbers and there composition:

http://www.rolexmetals.com/sdp/191736/4/cp-4928249/0/BS970_Specifications.html

and the modern European EN #:

http://www.keytometals.com/articles/art22.htm


Re: Crankshaft EN16B? [Re: toreador] #362345
03/10/11 10:48 pm
03/10/11 10:48 pm
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Posts: 66
Kansas City
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toreador Offline OP
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Kansas City
Okay, from wild guessing this seems like it should be a 1968-69 crankshaft. It has the TDC mark, and the timing mark, which were added in 68, but the whole crank was changed in 70, correct?

The reason I am asking is the sludge tube. I can't seem to get it to line up correctly with the bolt on the flywheel. If I insert the tube all the way, the single hole can barely be seen through the hole in the flywheel. Should this hole line up perfectly? Was there a different sludge tube in the 68-69 flywheel?


1951 Triumph sprung hub 6T bitsa, 52 motor with a 1 piece crank. (it's a 51, 52, 53, 54,...)
Re: Crankshaft EN16B? [Re: toreador] #362351
03/11/11 12:10 am
03/11/11 12:10 am
Joined: Mar 2005
Posts: 10,084
Boston, Massachusetts
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John Healy Online content

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Joined: Mar 2005
Posts: 10,084
Boston, Massachusetts
Quote:
Was there a different sludge tube in the 68-69 flywheel?


No! All after market parts are made equally. That is why a competent British mechanic's tool box has a draw full with every size, type, and shape of file available in the Modern world.


Re: Crankshaft EN16B? [Re: toreador] #362375
03/11/11 4:01 am
03/11/11 4:01 am
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Posts: 66
Kansas City
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toreador Offline OP
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Well the one that came with the engine was all gunked up and had scrape marks on it. Wasn't in it, so can't be sure it was. Bought an aftermarket, and I get exactly the same result. Normally can you just user your finger to seat one correctly, or do you ever have to do anything to get it to seat further in? Should it just slide in, or should I ever have to tap it the rest of the way in? Just don't want to make it any rougher for the next person wink


1951 Triumph sprung hub 6T bitsa, 52 motor with a 1 piece crank. (it's a 51, 52, 53, 54,...)
Re: Crankshaft EN16B? [Re: toreador] #362406
03/11/11 12:11 pm
03/11/11 12:11 pm
Joined: Jan 2005
Posts: 1,659
East Bethany New York
Dick Harris Offline
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Dick Harris  Offline
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East Bethany New York
It's normal to have to "tap" it in until the hole lines up for the insertion of the bolt. Dick


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