i_r_machinist
Titanium
- Joined
- Apr 12, 2007
- Location
- Dublin Texas
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another 40 year old German blueprint question...
- Thread starter i_r_machinist
- Start date
- Replies 5
- Views 1,806
Yes that's the reference to tolerance standards.
For machining Google DIN 7168 and use the "medium" column
The other references are for:
Casting
Flame cutting
Welding
In that order
Edit:
These are the general tolerances for non-toleranced dimensions
For machining Google DIN 7168 and use the "medium" column
The other references are for:
Casting
Flame cutting
Welding
In that order
Edit:
These are the general tolerances for non-toleranced dimensions
i_r_machinist
Titanium
- Joined
- Apr 12, 2007
- Location
- Dublin Texas
I think the first line is a reference to a standard for geometric tolerances.
The second line is a standard for surface roughness.
The triangles are used to define surface roughness on the drawing. it's hard to see if it's Ra or Rz, but the unit is µm. (My bet is on Rz)
An old machinist made it simple:
One triangle - saw cut
Two triangles - machined
Three triangles - ground.
The fourth line, the symbol with the letters "bs" defines flame cut surface
The fifth line is something with welding quality.
The second line is a standard for surface roughness.
The triangles are used to define surface roughness on the drawing. it's hard to see if it's Ra or Rz, but the unit is µm. (My bet is on Rz)
An old machinist made it simple:
One triangle - saw cut
Two triangles - machined
Three triangles - ground.
The fourth line, the symbol with the letters "bs" defines flame cut surface
The fifth line is something with welding quality.
MrSteve
Aluminum
- Joined
- May 26, 2014
- Location
- Boston/North Shore, MA, USA
Brenngeschnitten nach = “burning cut”
And 4 um [16 uin], 16 um [63 uin] 100 um [400 uin] surface finishes... so yea: grind, machine, saw
And 4 um [16 uin], 16 um [63 uin] 100 um [400 uin] surface finishes... so yea: grind, machine, saw