Section 11 / 18
Drawings & Tolerances
Reading drawings, ISO 286 fits, GD&T with 3D tolerance zones, threads and the standard features every drawing refers to.
- Live
- 3
- Pages planned
- 38
- Subsections
- 4
- Release phase
- Phase 1 first three months
Live pages
- 11 Dimensional tolerancesISO 2768 general tolerancesThe tolerances that apply to every dimension on a drawing without its own tolerance. The f, m, c and v tables of ISO 2768-1 for lengths, radii, chamfers and angles, the H, K and L classes of the withdrawn ISO 2768-2, and the new edition about to replace Part 1.
- 11 Threads and standard partsBolt property classes — 8.8, 10.9, 12.9 and the restWhat the two numbers on a bolt head mean, the minimum strength, proof stress and hardness of every ISO 898-1 class, how bolts are marked and matched with nuts, and how stainless classes such as A2-70 differ.
- 11 Threads and standard partsISO metric screw threadsThe 60° ISO metric thread: the basic profile, the formulas for pitch and minor diameters, coarse and fine pitches, tolerance classes such as 6H/6g, the stress area of a bolt, and which edition of each standard is current.
Section map
The subsections of this section and the number of pages planned in each. Pages go live in section order, all on the same template.
- 11.1Drawing reading0/8
- 11.2Dimensional tolerances1/10
- 11.3Geometric tolerances (GD&T)0/8
- 11.4Threads and standard parts2/12
In production 3 of 38 planned pages are live. The figure on each subsection is pages live / pages planned.