Fit Design Analyst Copyright 2009 David Denmat TM Tutorial 3 – Fit Design with Manufacturing Tolerances Tutorial 3: Fit Design with Manufacturing Tolerances
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FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Tutorial 3:
Fit Design
with
Manufacturing
Tolerances
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
Find: Design the Hole size that will achieve the above assembly requirements.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
Find: Design the Hole size that will achieve the above assembly requirements.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
Find: Design the Hole size that will achieve the above assembly requirements.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Note that the Basic Hole System is not applicable for this design.
Note the precision (the number of decimal places) of the given tolerances.
In this design, the precision is three decimal places (.XXX).
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance
specification.
Find: Design the Hole size that will achieve the above assembly requirements.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Note that the Basic Hole System is not applicable for this design.
Note the precision (the number of decimal places) of the given tolerances.
In this design, the precision is three decimal places (.XXX).
PRECISION
3-PLACE .XXX
Select a 3-place decimal from the Precision pull-down at the top of the screen.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Starting with the Shaft, select the lower (small) Shaft limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the Shaft lower limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the Shaft lower limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Select the Shaft upper (large) limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the Shaft upper (large) limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the Shaft upper (large) limit…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Intermediate results will be automatically posted.
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the allowance…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Enter the known information, in any order desired.
Enter the allowance…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
Intermediate results will be automatically posted.
. 7 5 4
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
. 7 5 4
Enter the known information, in any order desired.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
. 7 5 4
Enter the known information, in any order desired.
Enter the Hole tolerance…
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
. 7 5 4
Enter the Hole tolerance…
. 0 0 2
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1. 0 0 4
. 0 0 1
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted...
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6
The Hole size design limit dimensions.
CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6
The Hole size design mean dimension.
CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6
The Shaft size design mean dimension.
CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6
The Fit limits.
CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
The System Tolerance.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
All remaining dimensional fit solution information for the given design requirements
will be computed and posted.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
The resulting Mean Fit for the design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
Select Print Command for hard-copy documentation.
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Save the file for digital storage and retrieval.
LIMITS
LARGE
SMALL
+– –
HOLE
SHAFT
TOLERANCES MEANS
SMALL
LARGE
LARGE SMALLFIT
. 7 4 9 . 7 5 3 . 7 5 1 0. 0 0 4
. 0 0 7
. 7 5 4 . 0 0 2
. 0 0 1
. 7 5 6 . 7 5 5 0
. 0 0 4 0. 0 0 6CLEARANCE CLEARANCE MEAN CLEARANCE
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Draw the Hole and Shaft
geometry in CAD to their
mean dimensions…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Draw the Hole and Shaft
geometry in CAD to their
mean dimensions…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Draw the Hole and Shaft
geometry in CAD to their
mean dimensions…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
For reference,
mean dimensions
are displayed at
maximum precision.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Apply the tolerances to
the mean dimensions…
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Apply the tolerances to the
mean dimensions….
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Apply the tolerances to the
mean dimensions…
to post the limit dimensions.
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
Assemble “to the mean”.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
Assemble “to the mean”.
For reference,
mean dimensions
are displayed at
maximum precision.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
Assemble “to the mean”.
For reference,
mean dimensions
are displayed at
maximum precision.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
Note that the “mean fit”
is achieved. For reference,
mean dimensions
are displayed at
maximum precision.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
For reference,
mean dimensions
are displayed at
maximum precision.
FitDesignAnalyst
Copyright 2009 David Denmat
TM
Tutorial 3 – Fit Design with Manufacturing Tolerances
Given: A Ø3/4 nominal Shaft is purchased with a +.003/-.001 tolerance specification.
The Shaft is to slide in a Hole with a .001 allowance (minimum clearance).
The Hole diameter will be machined with a .002 tolerance.
Find: Design the Hole size that will achieve the above assembly requirements.
Note that the Basic Hole System is not applicable for this design.
End.
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