Visual learning guide · v0.1
Choose the tool, create the surface, verify the finish.
SOURCE FRAME
【職人の道具】初心者向け ヤスリの使い方
Executive summary
The practitioner distinguishes file size, cut and profile for the area, removes saw and hammer irregularities, and progresses from coarse to fine files. He uses sheen and a straightedge on flat faces, contact patterns and a smooth line on curves, then demonstrates bracing the work and cutting on the push stroke.
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Learning routes
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Evidence-backed steps
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Source video
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Video 1 · Workshop filing
The practitioner changes how the file is presented for L-shaped corners, radiused curves and long straight edges, checking surface feel, missed areas, burrs, filed width and snagging.
Video 5 · Kyoto engraver
The practitioner distinguishes file size, cut and profile for the area, removes saw and hammer irregularities, and progresses from coarse to fine files. He uses sheen and a straightedge on flat faces, contact patterns and a smooth line on curves, then demonstrates bracing the work and cutting on the push stroke.
Video 6 · Dayel grinder
The video states a thickness-reduction purpose, powered magnetic table, digital Z adjustment and manual X movement, transparent cover, supported part types, auxiliary plates, motor and single-phase supply. It does not explain operating sequence, settings, stopping criteria or inspection.
Video 7 · DONGTAI compact grinder
The on-screen text covers direction, light, start and speed controls; an order for valve-stem and housing-bore work; holder selection; forward/back grinding movement; a tapered rod; and diameter, flexibility, stroke and flow checks. There is no expert narration, so terminology and intent require practitioner confirmation.
Video 8 · Titans ID wheel
The practitioner shows three components: main shaft, threaded mounting arbor and grinding wheel. He scuffs the arbor face with a file, cleans with alcohol, mixes resin and hardener, coats the arbor, drops on and spins the wheel, then adds epoxy in the centre. He links cleanliness and a good bond to the stated 20,000–30,000 rpm operating range.
Distinguish size, cut and profile
Files differ in size, coarse/medium/fine cut, and profiles such as flat, half-round, triangular and square. The practitioner matches the shape to the area and identifies precision files for fine locations.
Distinguish the large inch file from the smaller file options.
インチヤスリって言われる大きなヤスリがあります。もう少し小さなヤスリもあります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Identify whether the file is coarse, medium or fine.
ヤスリの中にも粗め、中め、細めっていうような、ヤスリ自体の粗さの違いもあります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Choose a flat, half-round, triangular, square or other profile for the area; use a precision file for fine locations.
Why
The practitioner explicitly says the filing shape is matched to the location.
平ヤスリ、半丸と言われるヤスリ、三角、四角のヤスリ。場所に合わせて削っていくわけですね。細かなところを削りたいという時に精密ヤスリというのがあります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Remove irregularities, refine file marks, check flatness
Remove the irregular saw-cut edge until the full face shows sheen. Then use a finer file to remove coarse marks and place a straightedge against the face to distinguish flatness from waviness.
Apply the file to the sawn face and remove its irregularities.
Why
This creates the flat base surface described by the practitioner.
糸のこで切ってもやっぱりガタガタがあるんですね。ヤスリを当ててガタガタを取ってしまおうということですね。これで全体が光沢面になったということは、ここがまっすぐの面になったという。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
After the coarse file, change to a finer file and remove the earlier file marks.
Why
The practitioner uses the fine file specifically to remove the previous coarse marks.
粗いヤスリを細かなヤスリでヤスリ目を取りますね。実際に肉眼で見ると細かなヤスリで前の粗いヤスリを取ることができたということになります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Place a straightedge against the narrow face and compare the flat and wavy areas.
Why
The practitioner says a clean finish requires filing that creates a flat state.
ここからここまではまっすぐにヤスリをかけてヘラを当てているので、すごくフラットな状態があると思うんですけど、ここから上は糸のこで切った状態のところにヘラを当てているので、なみなみとなった感じ。綺麗に物をしようと思うと、フラットな状態を作るためのヤスリのかけ方というのが必要になります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Read contact, follow the radius, vary direction
When hammer marks are not to be retained, use a larger file to remove unevenness and follow the radius. Eliminate the alternating contact and non-contact areas, work from multiple directions, and progress to a finer file.
When the hammer texture is not being retained, use a larger file to remove the uneven marks.
Why
Hammer-forming leaves uneven marks on the object.
鼻筋で叩いて立体物を作ったりすると金槌の跡が残っています。これを取ってきれいにしたいって思う場合は金槌の跡の凸凹を取らなあかんですね。それを取るのに大きめのヤスリで削ってみますね。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Do not work only one spot; move the file with the radius of the curved surface.
Why
Removing the alternating contact and non-contact areas produces a smoother line.
ヤスリで削ると当たってないところ、当たってるところっていうのがわかると思うんですけれども、同じとこだけを削るんじゃなくてこのRに合わせて削ってやると、当たるところ当たらないところができます。これをなくしてやると、より滑らかなラインの面が出来上がります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
File from several directions rather than only one, working out the depressions.
この時のコツは、同じ方向からだけじゃなくて、いろんな方向から削りながら、凹みを取るように削っていってやります。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Do not stop at the coarse file; change to a finer file and refine the surface.
Why
The practitioner says the demonstrated sheen will not appear if the work remains at the coarse-file stage.
そして細かなヤスリを使って。こちらがヤスリで綺麗に取ってからヘラを当てた面の形。滑らかな面を作ったりできるんですけども。ヤスリも粗いままで減らしてもこんだけの光沢感出てこないので、細かなヤスリに変えていって磨いてやるっていうのが必要。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Straighten the face, brace the work, respect cut direction
A narrow face can also be filed straight. The practitioner braces the work against the bench pin to resist the push and emphasizes the basic direction: the file cuts when pushed, not when pulled back.
Apply the file to a narrow face that needs to be made straight.
ここの面なんかもやっぱり真っ直ぐにしておきたいなっていう時なんかも、ヤスリを使って削ります。こんな風にして真っ直ぐに削ったりします。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Place the work against the bench pin so it resists the forward push.
Why
The practitioner says the bench pin is there to stop the work being driven forward.
ヤスリの基本的なことをまず知らないとダメだと思うんですけど、ヤスリって削る方向があります。押す時には削れるけれども、引く時には削れないんですね。これも向こうに押される勢いを止めるために、このスリ板があるので、ここへ当てがって、押す時に削るということがすごい大事。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
Cut on the forward push. Do not treat the return pull as a cutting stroke.
Why
The practitioner states that the file cuts on the push, not on the pull.
ヤスリの基本的なことをまず知らないとダメだと思うんですけど、ヤスリって削る方向があります。押す時には削れるけれども、引く時には削れないんですね。これも向こうに押される勢いを止めるために、このスリ板があるので、ここへ当てがって、押す時に削るということがすごい大事。AI drafted this step from the speech or on-screen source text below. Practitioner approval is required before formal use.
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