Glossary entry (derived from question below)
German term or phrase:
Drehzahlkennwert
English translation:
speed factor or speed index
Added to glossary by
Yuu Andou
Jun 22, 2017 09:06
6 yrs ago
German term
Drehzahlkennwert
German to English
Tech/Engineering
Mechanics / Mech Engineering
Fettschmierung
Die folgende Aufstellung zeigt eine Auswahl von Fetten, die für hohe Drehzahlen
(***Drehzahlkennwert*** n x dm ≥ 1 x 106 mm/min) eingesetzt werden.
Je nach Anwendung können mit den synthetischen Hochgeschwindigkeitsfetten Werte bis 1,5 x 106 mm/min und höher
erreicht werden.
(***Drehzahlkennwert*** n x dm ≥ 1 x 106 mm/min) eingesetzt werden.
Je nach Anwendung können mit den synthetischen Hochgeschwindigkeitsfetten Werte bis 1,5 x 106 mm/min und höher
erreicht werden.
Proposed translations
(English)
| 3 +1 | speed factor or speed index |
Sangeeta Joshi
|
Proposed translations
+1
1 hr
Sangeeta Joshi
India
India
Native in English
Works in field
India
Accurate and readable
Native in: English (Variant: UK) 
, Hindi 
Works in: German to English
Related KudoZ points
:
12
Selected
speed factor or speed index
The speed index n x dm is a measure for the grease stressing by the speed, where n is the rotational speed of the bearing and dm is the main bearing diameter.
https://books.google.co.in/books?id=VRmLriy00pQC&pg=PA145&lp...
In Table 10-2, speed factor (also referred to as speed index) is determined by multiplying the
pitch diameter of the bearing by the bearing speed as follows;
(10-1)
where D is the bearing diameter (mm), d is the bore diameter (mm), and n is the rev/min. Speed factors
above 200,000 are usually indicative of fluid film lubrication applications.
http://www.pdhonline.com/courses/m220/c-10.pdf
For bearings with low-viscosity petroleum oil lubricant, the maximum operating speed is dictated by cage type and material, and centrifugal ball loads. In this ideal case the maximum operating inner ring rotation speed is given from the speed factor dN, where dN is the product of the bearing bore (d mm) times the maximum speed (N RPM). Depending on bearing design, dN can have values up to 600,000.
http://resource.dynaroll.com/speed-limitation.asp
https://books.google.co.in/books?id=VRmLriy00pQC&pg=PA145&lp...
In Table 10-2, speed factor (also referred to as speed index) is determined by multiplying the
pitch diameter of the bearing by the bearing speed as follows;
(10-1)
where D is the bearing diameter (mm), d is the bore diameter (mm), and n is the rev/min. Speed factors
above 200,000 are usually indicative of fluid film lubrication applications.
http://www.pdhonline.com/courses/m220/c-10.pdf
For bearings with low-viscosity petroleum oil lubricant, the maximum operating speed is dictated by cage type and material, and centrifugal ball loads. In this ideal case the maximum operating inner ring rotation speed is given from the speed factor dN, where dN is the product of the bearing bore (d mm) times the maximum speed (N RPM). Depending on bearing design, dN can have values up to 600,000.
http://resource.dynaroll.com/speed-limitation.asp
4 KudoZ points awarded for this answer.
Comment: "Danke schoen!"
Discussion
Eventually I guessed that "1 x 106 mm/min" is probably supposed to be scientific notation:
1×10<sup>6</sup> mm/min.
—DIV