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--- equipment:metalshop:how_to_use_files [2026/08/08 18:31] – created ralawrence
+++ equipment:metalshop:how_to_use_files [2026/08/08 22:49] (current) – ralawrence
@@ Line 2: / Line 2: @@
 **Eye Protection**
-Always wear safety glasses or goggles – metal swarf (filings) can fly into your eyes, especially when filing harder metals.
-Choose the Right File
+  Always wear safety glasses or goggles – metal swarf (filings) can fly into your eyes, especially when filing harder metals.
-Cut (coarseness): Use a bastard or second-cut file for fast removal of material. Use a smooth or dead-smooth file for finishing and fine work. Shape: Use a flat file for general surfaces, a half-round for curves and concave surfaces, and a triangular or square file for corners and slots. Size: A longer file (e.g., 250–300 mm) is better for large, flat surfaces; a shorter file (e.g., 150–200 mm) gives more control on small workpieces.
+  Choose the Right File
+  Cut (coarseness): Use a bastard or second-cut file for fast removal of material. Use a smooth or dead-smooth file for finishing and fine work. Shape: Use a flat file for general surfaces, a half-    round for curves and concave surfaces, and a triangular or square file for corners and slots. Size: A longer file (e.g., 250–300 mm) is better for large, flat surfaces; a shorter file (e.g., 150–200  mm) gives more control on small workpieces.
 **Fit a Handle (Essential)**
-Always fit a sturdy wooden or plastic handle onto the file’s tang (the pointed end).
-Never use a file without a handle – the tang can puncture your palm or wrist if the file jams.
+  Always fit a sturdy wooden or plastic handle onto the file’s tang (the pointed end).
+  Never use a file without a handle – the tang can puncture your palm or wrist if the file jams.
 **Secure the Workpiece**
-Clamp your workpiece firmly in a vice with the jaws just above the vice surface.
-Protect finished surfaces by using soft jaws (copper, aluminium, or leather) over the vice jaws.
+  Clamp your workpiece firmly in a vice with the jaws just above the vice surface.
-Keep the work at elbow height so your forearm is roughly horizontal when filing.
+  Protect finished surfaces by using soft jaws (copper, aluminium, or leather) over the vice jaws.
+  Keep the work at elbow height so your forearm is roughly horizontal when filing.
 **Correct Grip**
-Hold the handle with your dominant hand, with your palm over the end of the handle and your thumb along the top.
-Place your other hand on the front (toe) end of the file, with your fingers curled over the top edge and your thumb resting on the underside or side – this hand applies downward pressure and guides the file.
+  Hold the handle with your dominant hand, with your palm over the end of the handle and your thumb along the top.
+  Place your other hand on the front (toe) end of the file, with your fingers curled over the top edge and your thumb resting on the underside or side – this hand applies downward pressure and guides   the file.
 **The Filing Stroke (Forward Cut Only)**
-Files cut on the forward (push) stroke only.
-Forward stroke: Apply firm, even downward pressure with both hands. Push the file smoothly and steadily forwards at a slight angle (about 10–15°) across the work to produce a shearing action.
+  Files cut on the forward (push) stroke only.
-Backward stroke: Lift the file slightly off the work on the return stroke – or at least release all downward pressure – to avoid blunting the teeth.
+  Forward stroke: Apply firm, even downward pressure with both hands. Push the file smoothly and steadily forwards at a slight angle (about 10–15°) across the work to produce a shearing action.
-Use the full length of the file where possible, not just the middle.
+  Backward stroke: Lift the file slightly off the work on the return stroke – or at least release all downward pressure – to avoid blunting the teeth.
+  Use the full length of the file where possible, not just the middle.
 **Body Position and Motion**
-Stand with your feet shoulder-width apart, facing the vice.
-Move your whole upper body from the shoulders, not just your arms – this gives a straighter, more controlled stroke.
+  Stand with your feet shoulder-width apart, facing the vice.
-Keep the file level throughout the stroke to avoid rounding the edges of your work.
+  Move your whole upper body from the shoulders, not just your arms – this gives a straighter, more controlled stroke.
+  Keep the file level throughout the stroke to avoid rounding the edges of your work.
 **Checking Your Progress**
-Pause frequently and clean the file teeth with a file card or a stiff wire brush (brass is best to avoid damaging the teeth).
-Check your work with a straight edge or square to see where high spots remain.
+  Pause frequently and clean the file teeth with a file card or a stiff wire brush (brass is best to avoid damaging the teeth).
-Mark high spots with a marker pen or engineer’s blue, then file again until the surface is flat.
+  Check your work with a straight edge or square to see where high spots remain.
-Draw-Filing for a Smooth Finish
+  Mark high spots with a marker pen or engineer’s blue, then file again until the surface is flat.
-For a finer finish, use draw-filing:
+  Draw-Filing for a Smooth Finish
-Hold the file in both hands, one at each end, perpendicular to the work.
+  For a finer finish, use draw-filing:
-Pull the file sideways (across the work) with light, even pressure, using the length of the file like a sander.
+  Hold the file in both hands, one at each end, perpendicular to the work.
-This removes scratches and leaves a smooth, polished surface.
+  Pull the file sideways (across the work) with light, even pressure, using the length of the file like a sanderThis removes scratches and leaves a smooth, polished surface.
 **Safe Use and Storage**
-Never strike a file with a hammer – they are hardened and brittle; they will shatter.
-Never use a file as a pry bar or lever.
-Clean your file after use with a file card, brushing in the direction of the teeth (from heel to toe) to remove swarf.
-Store files separately so their teeth do not knock against each other – use a rack, a cloth roll, or wrap each in oily rag.
-Lightly oil your files after cleaning to prevent rust.
-**Pro tip:** For soft metals like aluminium or brass, use a file with a coarser cut and clean it more frequently, as these metals clog teeth quickly. For hardened steel, you will need a new, sharp file – a blunt file will just skid and burnish.
+  Never strike a file with a hammer – they are hardened and brittle; they will shatter.
+  Never use a file as a pry bar or lever.
+  Clean your file after use with a file card, brushing in the direction of the teeth (from heel to toe) to remove swarf.
+  Store files separately so their teeth do not knock against each other – use a rack, a cloth roll, or wrap each in oily rag.
+  Lightly oil your files after cleaning to prevent rust.
+**Pro tip:**
+  For soft metals like aluminium or brass, use a file with a coarser cut and clean it more frequently, as these metals clog teeth quickly. For hardened steel, you will need a new, sharp file – a blunt file will just skid and burnish.