The document provides a comprehensive overview of geometric dimensioning and tolerancing (GD&T), covering key concepts such as dimensions, key terms, and various tolerancing symbols. It elaborates on different forms of controls like straightness, circularity, and angularity, as well as the importance of position and orientation in engineering drawings. Additionally, the text addresses practical applications and assemblies related to GD&T principles.

1. GD&T
Geometric Dimensioning
And
Tolerancing
-By Rohan Vasant Ranjane

2. Index
Topic no. TOPIC NAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
DIMENSIONS AND DRAWINGS
KEY TERMS
MODIFIER & SYMBOLS
STRAIGHTNESS
CIRCULARITY
CYLINDRICITY
PLANAR DATUM
ORIENTATION CONTROL
PERPENDICULARITY
ANGULARITY
PARALLELISM
POSITION- INTRODUCTION
CONCENTRICITY
SYMMETRY
CIRCULAR RUNOUT
TOTAL RUNOUT
INTRODUCTION OF PROFILE
PROFILE OF A SURFACE
PROFILE OF A LINE

3. 1. DIMENSIONS AND
DRAWINGS

18. 2. KEY TERMS (GD&T)

37. 3. MODIFIER & SYMBOLS

63. 4. STRAIGHTNESS

84. SUPPORT : Shaft to needle roller interface

85. ASSEMBLY : Shaft to bushing assembly

89. 5. CIRCULARITY

101. SEAL : Lip seal mating surface.

102. SUPPORT : Bronze bushing mating surface

106. 5. CYLENDRICITY

121. SUPPORT : Shaft journal surface to support needle rollers.

123. 7. PLANAR DATUM

146. 8. ORIENTATION CONTROL

157. 9. PERPENDICULARITY

169. ASSEMBLY :Pilot diameter to mounting face

170. ORIENTATION: Controlling the orientation between datum features

171. ORIENTATION: Bracket mounting surface

172. 10. ANGULARITY

180. ORIENTATION : Guide

182. 11. PARALLELISM

190. DESCRIPTION NOT CLEAR—NEEDS
EXPLAINATION

192. ORIENTATION: Bracket

193. ORIENTATION: Clevis

195. 12. POSITION- INTRODUCTION

221. 13. CONCENTRICITY

234. 14. SYMMETRY

242. 15. CIRCULAR RUNOUT

246. DOUBT

247. DOUBT

248. DOUBT

252. DOUBT- According to drw indicates diameter tol but in statement it shows axis
tolerance.

253. DOUBT- in this diameter modifier could be used to 0.3.

265. POSITION/ LOCATION COAXIAL DIAMETERS: Locate coaxial diameters on a part

266. PROVIDE AN AXIS: Create an axis from coaxial diameters.

267. 16. TOTAL RUNOUT

282. POSITION/LOCATION PROVIDE AXIS: Coaxial diameters on a shaft

283. 17. INTRODUCTION OF PROFILE

303. 18. PROFILE OF A SURFACE

318. SUPPORT: Motor Base

319. LOCATE: Pump Body

321. 19. PROFILE OF A LINE