SUBTRACTIVE VS ADDITIVE MANUFACTURING | AM | LECTURE 02 BY MR. VIKRAM SINGH RAJPUT | AKGEC

SUBTRACTIVE VS ADDITIVE MANUFACTURING | AM | LECTURE 02 BY MR. VIKRAM SINGH RAJPUT | AKGEC

Title history
  • SUBTRACTIVE VS ADDITIVE MANUFACTURING | AM | LECTURE 02 BY MR. VIKRAM SINGH RAJPUT | AKGEC (PSI archive)
  • SUBTRACTIVE VS ADDITIVE MANUFACTURING | AM | LECTURE 02 BY MR. VIKRAM SINGH RAJPUT | AKGEC — observed on 20261030-1054 UTC (YouTube)
  • vikram 02 — observed on 20261029-0907 UTC (YouTube)

by Vikram Singh Rajput · View the channel on PSI

Applied Sciences & Engineering Engineering & Technology TGMechanical engineering and materialsTGPProduction and industrial engineering
🎙 Vikram Singh Rajput 👥 23K 📅 October 30, 2026 ⏱ 31 min 👁 0 📄 tutorial 🧭 2026-10-30
Available in: English (current) Français

Keywords

subtractive manufacturingadditive manufacturing3D printingprototypingdesign freedom

Summary

This lecture from AKGEC’s additive manufacturing series explains the fundamental differences between subtractive and additive manufacturing. The instructor, Mr. Vikram Singh Rajput, begins by contrasting material waste: subtractive methods like CNC milling and turning remove material to create the part, while additive methods build layer-by-layer, generating minimal waste. He illustrates why supports are needed for overhangs and how this creates some waste, but far less than traditional machining. The lecture then compares the two approaches across cost, design, speed, and quality for prototyping. Additive manufacturing can save up to 70% of prototyping cost by eliminating tooling, offering greater design freedom, accelerating design cycles (e.g., cars now launched in ~3 years instead of 6-7), and achieving high-quality prototypes via layer thickness control. A key distinction is drawn between the typical iterative design cycle (tooling, prototype, test, repeat) and the ideal cycle enabled by 3D printing, which allows freezing each stage early. Finally, a flowchart contrasts conventional (process-driven) and additive (design-driven) fabrication workflows, emphasizing that additive manufacturing removes many manufacturability constraints and requires only a build strategy.

175 words

Critical Evaluation

Value of the Information & Strength of the Argument

The information is presented with strong pedagogical value, using clear analogies (e.g., supporting roofs) and practical examples. The argument for additive manufacturing advantages is systematically built around cost, design, speed, and quality for prototyping, which is logical and well-communicated. The explanation of why additive processes still generate waste (supports) is honest and nuanced. The comparison of conventional versus ideal design cycles effectively illustrates the time-saving benefits. However, the lecture is introductory and does not delve into specific material properties, process limitations, or case studies, which would strengthen the technical depth.

Scientific Rigor, Source Quality, Title Accuracy

The lecture is rigorous in its logical structure and consistent with established engineering knowledge on manufacturing processes. The instructor references the course series and the college, but no external scientific sources are cited. The title accurately matches the content. No comments were provided for analysis, so the audience reception could not be assessed.

158 words

Title / Content Match

The title accurately reflects the content, which is specifically focused on comparing additive and subtractive manufacturing as part of a lecture series.

Quality & Reliability

7/10

Clear, well-structured academic lecture by an engineering professor, covering fundamental differences and practical implications of additive versus subtractive manufacturing. Lacks deep technical specifics but provides a solid conceptual foundation and relevant industrial context.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Contribution & Novelties

The lecture provides a clear, systematic comparison of subtractive and additive manufacturing, with particular emphasis on the design cycle advantages. Its original contribution lies in contrasting the typical iterative prototyping loop (tooling-heavy) with the ideal cycle enabled by 3D printing, highlighting how this compresses product development time. The discussion of build strategy parameters (orientation, supports, infill) introduces key concepts for beginners.

Pour aller plus loin :

107 words

Radar Profile

The radar profile shows balanced moderate-high scores across information quantity, quality, technical level, and reliability, indicating a solid but not exceptional educational resource. The technical level is relatively lower than other scores, reflecting the introductory nature of the lecture.

Reliability 7/10