Talk:Cold Saw/Build Instructions/Fabricability Review: Difference between revisions
Bastelmike (talk | contribs) (Created page with "I like the work from YK on the saw. Regarding drawings, I would like to add some comments: Rendering with threads: [[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.jpg...") |
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- in ISO tolerances aren't specified by the number of digits, thus 10 and 10.000 are identical in precision. Standard is to omitt trailing zeroes. | - in ISO tolerances aren't specified by the number of digits, thus 10 and 10.000 are identical in precision. Standard is to omitt trailing zeroes. | ||
- metric standard threads are written as "M 12", not as "M 12x1.75". Latter designation is only used for metric fine threads, ie. M12x1 | - metric standard threads are written as "M 12", not as "M 12x1.75". Latter designation is only used for metric fine threads, ie. M12x1 | ||
- its standard to apply a diameter sign only when its not visible as round. If the dimension is attached to a circle, no Ø is used. | - its standard to apply a diameter sign only when its not visible as round. If the dimension is attached to a circle, no Ø is used. | ||
- I am not happy with the method for dimensioning diameters. In my drawing its the standard method; YKs version is an exception. | - I am not happy with the method for dimensioning diameters. In my drawing its the standard method; YKs version is an exception. | ||
- I confused about some dimensions in those drawings. Why are there values like 31.8 and 51.8 mm ? Why not 50.8mm (2") or round 50mm ? | - I confused about some dimensions in those drawings. Why are there values like 31.8 and 51.8 mm ? Why not 50.8mm (2") or round 50mm ? | ||
- In the drawing header there are dimensions specified. This is not common in ISO. Also these tolerances are obviously nonsense. Don't think, YK wants us to drill a 12.700mm hole with a tolerance of +-0.005mm???? | - In the drawing header there are dimensions specified. This is not common in ISO. Also these tolerances are obviously nonsense. Don't think, YK wants us to drill a 12.700mm hole with a tolerance of +-0.005mm???? | ||
-drill bit size for M 12 is 10.2mm, not 10.5 . metric diameter minus thread = drill bit size | |||
Bastelmike | |||
Latest revision as of 12:58, 24 June 2012
I like the work from YK on the saw. Regarding drawings, I would like to add some comments:
Rendering with threads: [[1]]
![[1]](http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.jpg){kind=link}
And I did a drawing in accordance to metric ISO standards: [[2]]
- in ISO tolerances aren't specified by the number of digits, thus 10 and 10.000 are identical in precision. Standard is to omitt trailing zeroes.
- metric standard threads are written as "M 12", not as "M 12x1.75". Latter designation is only used for metric fine threads, ie. M12x1
- its standard to apply a diameter sign only when its not visible as round. If the dimension is attached to a circle, no Ø is used.
- I am not happy with the method for dimensioning diameters. In my drawing its the standard method; YKs version is an exception.
- I confused about some dimensions in those drawings. Why are there values like 31.8 and 51.8 mm ? Why not 50.8mm (2") or round 50mm ?
- In the drawing header there are dimensions specified. This is not common in ISO. Also these tolerances are obviously nonsense. Don't think, YK wants us to drill a 12.700mm hole with a tolerance of +-0.005mm????
-drill bit size for M 12 is 10.2mm, not 10.5 . metric diameter minus thread = drill bit size
Bastelmike