n40x2x18x8h specs...please
n40x2x18x8h specs...please
(OP)
I have to wire edm this spline in a part, and cant find the spline data. I know i have to cut it per din 5480, but im not used to metrics. My edm gear program generates alot of info, but i dont know what to do with the 8h which i believe refers to the class of fit. How do i find the tolerances of this spline. I am cutting the internal only, and i dont have the shaft in my possesion. I have to get it right the first time. Any help is appreciated. The tooth thickness and space width seem to be at odds with each other as well. I also cant find what the minor is supposed to be.





RE: n40x2x18x8h specs...please
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Second, I am not an expert on splines, so I can only tell you that N40 is the hub reference diameter, 2 is the module, 18 is the number of teeth, and 8h is the side fit requirement. h means no deviation, and tolerance class 8 has the following requirements
TG total tooth thickness (or space width) tolerance = 0.090 mm
Tact actual tooth thickness (or space width) tolerance = 0.056 mm
Teff effective tooth thickness (or space width) tolerance = 0.034 mm
Table 7 of DIN 5480-1 contains the information that you need.
RE: n40x2x18x8h specs...please
The standards will give a guide as to how to work this out.
If my customer can not give me this information then I will usally give them a easy sliding fit. In this case it would be something like 9H.
I can sell you the DXF to cut this spline.
Contact me via the link below.
Ron Volmershausen
Brunkerville Engineering
Newcastle Australia
http://www.aussieweb.com.au/email.aspx?id=1194181
RE: n40x2x18x8h specs...please
"You can not mate an '8f' with a '8H'" should have read; You can not mate an '8f' with a '8F'.
Ron Volmershausen
Brunkerville Engineering
Newcastle Australia
http://www.aussieweb.com.au/email.aspx?id=1194181
RE: n40x2x18x8h specs...please
DP=25,4/2=12,7
PA=30
T=18
BD=31,117 mm
ID=36 +0,1 mm
OD=40 +0,52 mm
space width=4,181 +0,026/+0,07 mm