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Cost Estimators
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GD&T References
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DfMA Checklists
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20% off Masterclasses
An in-depth look at the members area
Members Toolkit

Welcome back, engineer.

Your DfMA & GD&T engineering toolkit. Tools, references, and exclusive member pricing on masterclasses.

Interactive estimators.

Parametric tools that calculate cost, resolve process chains, and give you actionable design feedback.

Standards & quick references.

Deep-reference pages built from ISO and DIN standards. Tolerances, symbols, fits, finishes — everything you need on one screen.

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ISO 2768 — General Tolerances
All tables for Part 1 (linear, angular, broken edges) and Part 2 (flatness, perpendicularity, symmetry, run-out). Note: ISO 2768-2 withdrawn 2021 — superseded by ISO 22081.
New 2021 📐
ISO 22081 — General Geometrical Tolerances
GPS-integrated replacement for ISO 2768-2. General geometrical tolerances specified directly in the title block using ISO 1101 syntax — no more H/K/L classes.
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ISO 286 — IT Tolerance Grades
IT01–IT16 values for all diameter ranges, process capability mapping, hole-basis fits table, notation guide.
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Surface Roughness & Finish
Ra/Rz/Rq parameters, N-grade visual scale (N1–N12), process Ra ranges for 25 processes, ISO 1302 drawing symbols.
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GD&T — ISO 1101 Quick Reference
All 14 geometric characteristics, feature control frame anatomy, datum reference rules, MMC/LMC/RFS modifiers, ISO vs ASME comparison.
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Welding Tolerances & Symbols
ISO 2553 symbol anatomy, ISO 5817 quality levels, acceptance criteria, ISO 13920 structural tolerances, ISO 4063 process codes.
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Process Tolerances by Method
Achievable tolerances for CNC, sheet metal, casting, injection molding, forging, welding, AM, EDM, and extrusion.
New 🧩
DIN 16742 — Plastic Injection Moulding Tolerances
TG1–TG9 tolerance groups, size tolerances (Table 2), position tolerances (Table 9), Annex C material classification, W vs NW dimensions, PEEK/PEI guidance.
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Materials Reference — Metals, Polymers, Ceramics & Composites
Mechanical, physical & chemical-resistance tables. Emphasis on stainless steel, aluminum, titanium and ABS/PC/PEEK/PEI, plus a cross-family quick-comparison table.

Masterclasses & sessions.

Live sessions with Fırat. Deep dives into real engineering problems. As a member, you get 20% off every session.

20% Member Discount
Weekly Sessions
DfMA & GD&T Office Hours

Bring your design challenges. Live problem-solving, drawing reviews, and tolerance analysis. Small group format — maximum interaction.

€75 €60 Save €15
  • Live drawing & design reviews
  • GD&T interpretation challenges
  • DfMA cost reduction strategies
  • Q&A with real industry examples
Book a Session →
20% Member Discount
Monthly Masterclass
Deep Dive Masterclass

Intensive 3-hour sessions on a specific topic. Theory + practice + case studies from semiconductor, defense, and precision engineering.

€195 €156 Save €39
  • Rotating topics: DfMA, GD&T, tolerance analysis
  • Real industry case studies (ASML, aerospace, defense)
  • Hands-on exercises with feedback
  • Recording available for 30 days after session
Reserve Spot →