Surface
Texture and its symbol
A surface roughness
value, cut off value or reference length. The processing method,
grain direction ( machining direction ) are indicated around the
surface texture symbol as shown below :-
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a = Ra
Value
b = Machining method
c = Cut off value, length
d = Grain direction
e = Parameter
f = Parameter other than Ra value
g = Surface undulation |
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Symbol
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Meaning
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Surface
Symbol
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Removal
od material by machining is required
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Removal
of material is prohibited
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Upper
limit of Ra Value
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Grain
direction
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Machining
Method
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Upper and
lower limit of Ra value |
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Surface
finished its roughness
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