Sep 17, 2004 01:15
20 yrs ago
4 viewers *
English term
Probst Armin
Tightening Angle for Screws
English
Tech/Engineering
Mechanics / Mech Engineering
What is the tighetning angle (degree)of an ordinary M48 screw made of material 8.8 which is actualy specified with a tightening torque of 3700Nm
Responses
| 3 +3 | torque rate |
eldira
|
| 4 | Below |
Gareth McMillan
|
| 4 | s. u. |
fcl
|
Change log
Aug 9, 2005 16:41: Robert Donahue (X) changed "Level" from "Non-PRO" to "PRO"
Responses
+3
1 hr
Selected
torque rate
this article might clarify matters:
Screw joints vary not only in size but also in type which changes the characteristics of the joints. From a tightening point of view the most important quality of a joint is the “hardness”. In figures this can be defined as the “torque rate” which is the tightening angle necessary to achieve the recommended torque of the screw dimension and quality in question measured from the snug level – the point at which the components and the screw head become tight
www.atlascopco.com/.../website.nsf/0/ 2cd20ab5cce54542c1256c5c002fc555/$FILE/Tightening%20technique.pdf
HTH
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Note added at 3 hrs 31 mins (2004-09-17 04:46:46 GMT)
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the two materials which have to be bolted together with each other Ck25 (bearing cover) is only relevant if the pressure as a result of the torque wrench setting for the screws is 3700Nm and the material used has a standard of 8.8
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Note added at 3 hrs 34 mins (2004-09-17 04:49:54 GMT)
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some additional information from:
Depending on the manufactured size respectively the size of the bearing the sleeve nut is tightened with tightening angle 9 (Table ), this produces the required bearing air.
www.gebhardt.de/de/de_pdf_dateien/ MA_Lager-RZR-TZR-VZR-RER_GB.pdf
Screw joints vary not only in size but also in type which changes the characteristics of the joints. From a tightening point of view the most important quality of a joint is the “hardness”. In figures this can be defined as the “torque rate” which is the tightening angle necessary to achieve the recommended torque of the screw dimension and quality in question measured from the snug level – the point at which the components and the screw head become tight
www.atlascopco.com/.../website.nsf/0/ 2cd20ab5cce54542c1256c5c002fc555/$FILE/Tightening%20technique.pdf
HTH
--------------------------------------------------
Note added at 3 hrs 31 mins (2004-09-17 04:46:46 GMT)
--------------------------------------------------
the two materials which have to be bolted together with each other Ck25 (bearing cover) is only relevant if the pressure as a result of the torque wrench setting for the screws is 3700Nm and the material used has a standard of 8.8
--------------------------------------------------
Note added at 3 hrs 34 mins (2004-09-17 04:49:54 GMT)
--------------------------------------------------
some additional information from:
Depending on the manufactured size respectively the size of the bearing the sleeve nut is tightened with tightening angle 9 (Table ), this produces the required bearing air.
www.gebhardt.de/de/de_pdf_dateien/ MA_Lager-RZR-TZR-VZR-RER_GB.pdf
Peer comment(s):
| agree |
Orla Ryan
7 hrs
|
| agree |
Angela Dickson (X)
326 days
|
| agree |
Robert Donahue (X)
326 days
|
4 KudoZ points awarded for this answer.
Comment: "Graded automatically based on peer agreement."
5 hrs
Gareth McMillan
Native in English
&
English
Specializes in field
Least is most, so keep it simple!
Native in: English 
Works in: German to English, English
Related KudoZ points
:
16
Below
Once a screw has been tightened to its elastic limit, it is then tightened further by turning it through a specified angle. This action stretches the screw slightly beyond its elastic limit. It is the best tightening method, but can't be repeated on the same screw, as it has already been stretched.
7 hrs
s. u.
These are two different measures and usually one _or_ the other is used but there is no easy conversion method. Reason is quite simple: tightening 90° 2 rubber plates and 2 steel plates result in two (very) different torques for example.
But I am looking for a rule of the thumb, if there is one.
Why do you need this?
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Note added at 1 day 5 hrs 11 mins (2004-09-18 06:26:56 GMT)
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No \"rule of the thumb\", I am afraid. Seems purely experimental.
But I am looking for a rule of the thumb, if there is one.
Why do you need this?
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Note added at 1 day 5 hrs 11 mins (2004-09-18 06:26:56 GMT)
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No \"rule of the thumb\", I am afraid. Seems purely experimental.
Discussion