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ISO 2768-mk print call out

#1
Hello All,

I am trying to understand which table I need to look at for ISO 2768-mK based on the tolerance example for a Flat washer I was given below. I always confuse this standard. This one is my least favorite.
Example.
Outside Diameter:15.9mm
Inside Diameter: 6.4mm
Thickness: 3.5mm
 
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Jim Wynne

Staff member
Admin
#2
Welcome to the Cove. :bigwave:
Please provide more information. There is ISO 2768-1 and -2. The "m" class tolerances are given in 2768-1 and the "k" class tolerances are given in 2768-2. Do you have a drawing that calls out ISO 2768? If so, please provide the exact text of the drawing specification. If this is not the case, please explain the basis of your question.
 

Jim Wynne

Staff member
Admin
#4
You need to answer the questions that I asked:
  1. Do you have a drawing that calls out ISO 2768? If so, please provide the exact text of the drawing specification.
  2. If [1] is not the case, please explain the basis of your question.
 
#5
Yes it does call out ISO 2768-mK. I am trying to figure out which Table I need to look at in IOS 2768-1 for the Outside Diameter Inside diameter and Thickness based on the dimensions below.

Outside Diameter:15.9mm
Inside Diameter: 6.4mm
Thickness: 3.5mm
 

Jim Wynne

Staff member
Admin
#8
KES B-005 as called out on the drawing seems to be a Kia standard, not a Japanese standard. How have you determined the equivalency with ISO 2768? How do you know whether you need ISO 2768-1 or -2?
 
#9
Because in Spec KES B-005 has table call out for JIS B0405-m for Medium Grade of Dimensional Tolerances. JIS B0405 Part 1 Spec shows its ISO 2768
 

Jim Wynne

Staff member
Admin
#10
  1. You need to know, if you're going to use ISO 2768, which version of it (-1 or -2) to use.
  2. You need to have copies of each of the relevant specification documents if you don't have them already.
  3. If your customer specifications aren't clear, you need to query the customer. No one here can tell you for sure what's needed.
 
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