GD&T Tips from Tec-Ease, Inc.
GD&T Tips from Tec-Ease will help you to better use and understand the GD&T concepts. Use the links below to find the GD&T Tip for your current needs.
Angularity View Tips
Circularity (Roundness) View Tips
Concentricity View Tips
vs. Runout Video!
Use Position
Cylindricity View Tips
Datums View Tips
Datum Terms Video!
Translation Modifier Video!
Must Be Referenced Video!
Targets Video!
Repetitive Patterns
Mutually Perpendicular
Referencing Itself?
Datum Feature Control
Primary Datum Feature
Datum Features
Keep It Simple
Example
With General Tolerance
Datum Feature Selection
Function Example
Slot as Primary
Application Video!
Two Holes
Horizontal Video!
On a Diagonal Video!
Datum Feature Types
Primary
Planar Video!
Width Video!
Sphere Video!
Cone Video!
Linear Extrusion Video!
Complex Video!
Hole and Slot Video!
Hole and Slot Simulation Video!
Secondary
Simulation
Datum Features
Must Be Referenced Video!
Axis vs. Center Line Video!
Datum Not on Part Video!
Datum Reference Frame
Oblique Angle
Establishing
Displacement (Shift)
Shift Is Not a Bonus
Tolerances Do Not Change
Rotational Shift Video!
Geometry Effect Video!
Example Video!
Application Video!
Exact Constraint
Over Constraint
Rocking Datum Feature Video!
Orienting Datum Planes
Tertiary Datum Feature
Using a Slot Video!
Sufficient Size
Thin Feature
Short Hole Video!
Symbol Placement
Center Plane
Axis
Dimensions and Tolerances View Tips
Basic and +/- Don’t Mix Video!
+/- vs. Profile Example Video!
Dimensioning vs. Tolerancing Video!
Multiple In-Line Features Video!
Implied Video!
Slots Video!
Reduced Dimension Drawings
Rounding
Converting
Schedule of Tolerances
Basic
Do Not Tolerance
Toleranced Dimensions
Don’t Mix Dimensioning
General Notes
Trailing Zeros
Half Dimensions Video!
Angles
Consider the Reader
Compound Angle Video!
Placement
Doesn’t Matter
Get Back to Datums
And Composite Video!
Basic Dimension Placement Doesn’t Matter Video!
Direct Tolerancing
Locating Radii
Be Clear
Origin Symbol
Still Have a Place
Old School
That Still Works
No GD&T Video!
Don’t Located With +/- Video!
Feature Control Frame View Tips
Tolerance Zone Shape Video!
Features of Size View Tips
Continuous Feature Video!
Interrupted Video!
Determining Video!
Locating Dimensions to Centers
Irregular Features of Size Video!
Envelopes
Determining Size and Center Video!
Irregular Features of Size
Locate with Profile
Locate with Position
Flatness View Tips
Hierarchy View Tips
Inspection View Tips
Notes View Tips
Parallelism View Tips
Perpendicularity View Tips
Position View Tips
Extension of Principle Video!
Threads at MMC
Formulas
Oblique Features
Locating Features of Size
Calculating Bonus - 1994
Bi-directional Control
Calculating Bonus - 2009 and 2018
Boundary Control
Inspection
MMC and LMC Are Single Limits
Composite
Datum Feature References
Second Segment
Using a Note Video!
Several Examples Video!
Feature to Feature Control Video!
Composite l Video!
Composite ll Video!
Composite lll Video!
Composite l Gage Video!
Composite ll Gage Video!
Composite lll Gage Video!
Single Segment
Example ll
Example l
Cpk Calculation
Coaxial Example
From CMM Data
Profile View Tips
Placement Video!
At MMC Video!
Calculating Size Tolerance
Tolerance on Two Surfaces
Of a Line
Controlling Size Part l
Controlling Size Part ll
Unequal and Unilateral
Locating Surfaces
vs. Position Boundaries
Controlling Size and Form
Unit Basis Video!
Between Video!
Use Profile to Control Size and Form Video!
Applications
Cutter Ring
Irregular Feature
As a General Tolerance
Simplify Drawings
Profile can Control Location of Irregular Features Video!
Composite
On a Single Surface
Position can Control Location of Irregular Features Video!
Coplanarity
And Flatness
And Parallelism
Inspection
Work vs. Risk
Cutter Ring
Reporting l
Measure Normal
Parallel Surface
Radius
Oblique Surface
Simplified Inspection
Reporting ll Video!
Rules View Tips
What are the Rules? 1994, 2009, & 2018
Defaults Video!
Rule #1
Inspection
Size Controlling Form
Is Not an Option
Break the Rule Video!
Simultaneous Requirements
Overriding the Rule
Creating a Pattern
Simplifying the Dimensions Video!
Application Video!
Runout View Tips
Keep Your Runouts Straight
Circular vs. Total
When in Doubt - Use Runout - 1994 and 2009
Only Locates Cylinders
Runout or Profile
When in Doubt - Use Runout - 2018
Standards View Tips
Molded Part Symbols Video!
Default Tolerances Video!
Difference in Revisions Video!
Y14.41 Video!
Other Standards Video!
2009 Symbols Video!
Are Voluntary Video!
Addendum Video!
2009 Revision Video!
Matter of Life or Death Video!
Straightness View Tips
Center Plane at MMC - Hard Gage Inspection
Consider Runout
Two Kinds of Straightness Tolerance - 1994
Center Plane at MMC - Indicator Inspection
Two Kinds of Straightness Tolerance - 2009 and 2018
Symmetry View Tips
Tolerance Modifiers View Tips
Projected Tolerance - 1994 and 2009
Projected Tolerance - 2018
Free State
Default
Restraint with Datum Targets Video!
Tangent Plane
Application
No Form Control
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