Drawing/Writing

: General interpretation of thread chamfer and guide dimensions

2025/8/15 Drawing/Writing

Here is a note on "General Interpretation of Thread Chamfer and Reference Dimensions", one of the notes in mechanical drawing.　This is a little more detailed explanation so that even beginners in mechanical design can easily understand it. Thread chamfer Drawing

: Surface roughness and surface roughness obtained by different machining methods

2025/8/15 Machining/ Foundation, Drawing/Writing

Here are some notes on "Surface Roughness and Surface Texture Obtained by Each Machining Method". Surface roughness and surface roughness obtained by different machining methods To determine the surface roughness (surface roughness) to be described on a machine drawing, it is necessary to know which machining method is used and which surface roughness is obtained by which machining method.

: Bending R design method and instructions for sheet metal, supplemental

2025/10/19 Drawing/Writing, Design Information

Today's note is on "How to design sheet metal bending R and how to instruct and supplement it". Sheet metal parts are used in machinery and everywhere else.　Today, I'd like to explain how to design a bending radius for sheet metal and the information surrounding ...

: Difference between prototype and mass production drawings

2025/8/15 Drawing/Writing

Here is a note on the difference between prototype drawings and mass production drawings, which is mentioned in the article on mechanical drawing. As you may have experienced, after submitting a new part drawing, there are several inquiries from the machin...

: The story shows that hand-drawn drawings and drafting skills are necessary even if 3DCAD is widely used.

2025/8/15 Drawing/Writing

Here is a memo that shows the importance of mechanical drafting knowledge: "Hand-drawn drawings and drafting skills are necessary even if 3DCAD is widely used. The other day I was on Twitter and saw a drafting lecture given by a student on hand-drawn ...

: Information about the drawing frames for mechanical design (with reference drawing frames and title columns)

2025/8/15 Drawing/Writing

This section contains notes on "Information on Mechanical Design Drawing Frames" in mechanical drawing. The drawing frame of mechanical design Each company's drawing frame of mechanical design varies in expression while satisfying the standard (description rule), but the conventional paper ...

: JIS standard and commonly used hole dimensions

2025/1/30 Screw/Bolt, Drawing/Writing

Today's memo is about "JIS standards and commonly used hole dimensions for countersunk firings and countersunk thumbscrews". The other day, I made a note of what I learned when I was doing some research on the dimensions of countersunk tapping holes for countersunk screws. Flathead firings and flathead zaguri ...

: Information on general counterbore depths (dimensions) and processing methods for hexagon socket head bolts

2026/2/27 Screw/Bolt, Drawing/Writing

Today's memo is about "Common countersink depths (dimensions) and machining methods for socket head cap screws." There is a lot of this kind of dimensional information already available, but this article focuses on "common socket head cap screws...".

: The Role of Drawings and Draftsmen's Awareness

2025/8/15 Drawing/Writing

Today's note is on "The Role of Drawings and the Draftsman's Awareness".　The other day, I gave a stern reminder to the young and new people with whom I work about the role of drawings and the awareness that drafters should have. To be precise, I scolded ...

: About fitting (Tolerance table)

2025/11/13 Tolerance design, Drawing/Writing

This section is a memo about fits, which are expressed together with dimensions in mechanical drawings. Basic information about fits and the fit tolerances that apply to commonly used parallel pins and bearings are summarized. Fits ...