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Zudem kommt "bull gear" in der Markenbezeichnung "bull gear drive" (TM) vor, doch dürfte dies hier nicht gemeint sein. Auch andere bzw. abgewandelte Bedeutungen von "bull gear" (Bsp. Drehmaschine) dürften hier nicht in Frage kommen (s. a. http://www.proz.com/kudoz/english_to_german/mechanics_mech_e... ("ölgeschmiertes Großrad mit Lyabyrinth(ab)dichtung").
Bull gear
The term bull gear is used to refer to the ***larger of two spur gears*** that are in engagement in any machine. The smaller gear is usually referred to as a pinion. http://en.wikipedia.org/wiki/Bull_gear
What is a "bull gear"?
You rarely hear the term these days, but I'll wager that if you mention it around an old-timer that has been around trucks, tractors and machinery, they'll know exactly what you're talking about. The term was originally used to describe the massive, slow, and powerful final drive gear used in large machinery. An example is shown below... (b) being the ***bull gear,*** driven by the pinion (a). http://www.bullgearinc.com/9.html
[bull gear: compessor applications, m. Abb.]
A fifth *pinion* can be installed below the
*bull gear* for 9 and 10 stage compressor
applications. Although often an
electric motor is used to drive the bull
gear*, the fifth pinion can also be used
to drive the bull gear and gearbox for
turbine driven applications. http://www.bhs-getriebe.de/lang_en/information/documents/bhs...
[Abb. (Folie 11): zwei Paare mit jeweils einer "bull gear stage" (Großrad) und einer "pinion stage" (Ritzel, Kleinrad)]
13. Bull Gear Stage 2"
14. Pinion Stage 2
15. Bull Gear Stage 3
16. Pinion Stage 3 http://www.me.tu-dresden.de/lehre/ansyst/pdf/AS-Simulation-M...
Specialty Definition: BULL GEAR
[1]
Mechanical Engineering
Gearing in a piston engine to reduce the rotational speed of the propeller shaft. Source: European Union. (references)
***Largest gear in train,*** especially large gear on which aerial of surveillance radar is mounted. Source: European Union. (references)
Mining
A. A toothed driving wheel that is the largest or strongest in the mechanism b. A gear or sprocket that is much larger than the others in the samepower train. (references)
Das "Großrad" hat mich schließlich als übergeordnete Lösung überzeugt. Aber ich bedanke mich ausdrücklich auch bei Thomas und Detlef für die großartige Recherchearbeit! 4 KudoZ points were awarded for this answer
Ich vermute das Thomas vor allem mit dem "Antriebsstirnrad" richtig liegt, weil ich glaube, dass der Autor mit dem "BULL" etwas über die Fkt. dieses Rades sagen will, und zwar als Antrieb dient.
Zudem kommt "bull gear" in der Markenbezeichnung "bull gear drive" (TM) vor, doch dürfte dies hier nicht gemeint sein. Auch andere bzw. abgewandelte Bedeutungen von "bull gear" (Bsp. Drehmaschine) dürften hier nicht in Frage kommen (s. a. http://www.proz.com/kudoz/english_to_german/mechanics_mech_e... ("ölgeschmiertes Großrad mit Lyabyrinth(ab)dichtung").
Bull gear
The term bull gear is used to refer to the ***larger of two spur gears*** that are in engagement in any machine. The smaller gear is usually referred to as a pinion. http://en.wikipedia.org/wiki/Bull_gear
What is a "bull gear"?
You rarely hear the term these days, but I'll wager that if you mention it around an old-timer that has been around trucks, tractors and machinery, they'll know exactly what you're talking about. The term was originally used to describe the massive, slow, and powerful final drive gear used in large machinery. An example is shown below... (b) being the ***bull gear,*** driven by the pinion (a). http://www.bullgearinc.com/9.html
[bull gear: compessor applications, m. Abb.]
A fifth *pinion* can be installed below the
*bull gear* for 9 and 10 stage compressor
applications. Although often an
electric motor is used to drive the bull
gear*, the fifth pinion can also be used
to drive the bull gear and gearbox for
turbine driven applications. http://www.bhs-getriebe.de/lang_en/information/documents/bhs...
[Abb. (Folie 11): zwei Paare mit jeweils einer "bull gear stage" (Großrad) und einer "pinion stage" (Ritzel, Kleinrad)]
13. Bull Gear Stage 2"
14. Pinion Stage 2
15. Bull Gear Stage 3
16. Pinion Stage 3 http://www.me.tu-dresden.de/lehre/ansyst/pdf/AS-Simulation-M...
Specialty Definition: BULL GEAR
[1]
Mechanical Engineering
Gearing in a piston engine to reduce the rotational speed of the propeller shaft. Source: European Union. (references)
***Largest gear in train,*** especially large gear on which aerial of surveillance radar is mounted. Source: European Union. (references)
Mining
A. A toothed driving wheel that is the largest or strongest in the mechanism b. A gear or sprocket that is much larger than the others in the samepower train. (references)
sci-trans Local time: 02:43 Native speaker of: German PRO pts in category: 145
Grading comment
Das "Großrad" hat mich schließlich als übergeordnete Lösung überzeugt. Aber ich bedanke mich ausdrücklich auch bei Thomas und Detlef für die großartige Recherchearbeit!
-------------------------------------------------- Note added at 42 Min. (2009-01-29 12:41:55 GMT) --------------------------------------------------
Das ist das Problem, ich weiß es auch nicht genau, sonst hätte ich längst eine Antwort abgeschickt.
Detlef Mahne India Works in field Native speaker of: German PRO pts in category: 30
Note to reference poster
Asker: Vielen Dank, schon mal. Ich hatte die meisten dieser Seiten bereits gefunden, mein Problem ist eher, dass ich nicht weiß, welcher dieser Begriffe der geeignetste ist... :-S
The translation workplace 
peer agreement (net): +1
