tolerances, machining and cost

[Ayien]

Guys,
I make a bar to have clearance fit into a slot. The bar is X+0/-.0010" (eg: 1.0000 +0/-.0010" , which give a tolerance of .0010"). Now, the slot size is either (a) X+.0010/+.0002" (tol= .0008") or (b) X+.0010/+.0005" (tol=.0005").
Q: which tolerance fit best, easier machining process and cost effective?TQ

[Kelly_Bramble]

The variation of + or - is meaningless, we can rewrite a tolerance variation anyway we choose relative to the nominal size.

What matters is the total tolerance variation relative to the material, size, target manufacturing process, and associated target costing. Your tolerances specified are achievable and fit is determined by the clearance of the completed parts.

See: https://www.engineersedge.com/general_tolerances.htm

[ridvansteel]

Here you can find an exceptional tolerance value.
https://www.engineersedge.com/iso_tolerance.htm

[Kelly_Bramble]

Here you can find an exceptional tolerance value.
https://www.engineersedge.com/iso_tolerance.htm

And even better https://www.engineersedge.com/calcul...tolerances.htm

[Ayien]

thanks guys,

I need to explain to some guys here at my place that X+.0010/+.0005inch is tighter than X+.0010/+.0002inch as the former tolerance is .0005" and the later is .0008" This means that the later dimension is preferable by machinist.
Am I suggest the correct statement?

[jasonamurawski]

This is a correct statement