metric drawing dimensioning ?
metric drawing dimensioning ?
(OP)
I have very little experaince with metric. I have a drawing that gives a clearance of
0.56 +8'
what does the ' mean? I am thinking
0.56 -0 / +0.08
would that be correct?
0.56 +8'
what does the ' mean? I am thinking
0.56 -0 / +0.08
would that be correct?





RE: metric drawing dimensioning ?
RE: metric drawing dimensioning ?
Mike Halloran
Pembroke Pines, FL, USA
RE: metric drawing dimensioning ?
RE: metric drawing dimensioning ?
The drawing was a scan from an old instruction book. As I cut and paste to make illustration for discussion with customer, I saw it!
I have attached the drawing and now that I know what it is, I don't know how I could have read that as 0.56 +8'
Thanks for the replys
RE: metric drawing dimensioning ?
?
Still makes no sense.
Mike Halloran
Pembroke Pines, FL, USA
RE: metric drawing dimensioning ?
RE: metric drawing dimensioning ?
Mike Halloran
Pembroke Pines, FL, USA
RE: metric drawing dimensioning ?
the other dimensions on the drawing were all +X, but bearings are normaly given +X/-0
I think as I copied and pasted making the illustraion, some of the clutter pixels cleared up. Or I could have been It was 3am when I first looked at the drawing.
I hope it is +0.1 as that would be a reasonable tolerance for this bearing. this is the first time I have seen drawings from this OEM.
RE: metric drawing dimensioning ?
It's a strong vindication of CAD, where the text would be much clearer and sharper.
RE: metric drawing dimensioning ?
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: metric drawing dimensioning ?
The conversion to inches would be:
0.56 mm to in = 0.022 in
0.10 mm to in = 0.004 in
thus:
[0.022 in +0.004/-0.0 in]
The diameter of the bearing is 280 mm = 11.024 in
The clearance to diameter ratio is :
0.022/11.024 = 0.002 in clearance per in diameter
Which is pretty standard for shafts this size.
saludos.
a.