mandrel
mandrel — noun
1. a thin rod, often slightly tapered, that you slide into the hole of a part so th
a thin rod, often slightly tapered, that you slide into the hole of a part so the part can be turned on a lathe without wobbling.
Esteban pushed a tapered mandrel into the brass ring before mounting it on the lathe.
verb + mandrel + into + workpiece
Gabriel wiped the mandrel clean with a cotton rag before clamping a new gear blank in place.
Christopher noticed the mandrel was slightly bent, so the finished steel pin spun off-centre on the lathe.
Sora chose a smaller mandrel so that the bronze sleeve would grip it tightly during turning.
文法句型
mandrel + into / through + workpiece
用法筆記
Subject is usually a machinist or the part itself; almost always paired with a lathe, drill press, or similar rotating tool.
常見錯誤
2. a solid rod or form that you wrap, bend, mold, or hammer material around so the
a solid rod or form that you wrap, bend, mold, or hammer material around so the material takes the rod's shape.
Vikram heated the copper tube and bent it slowly around a steel mandrel to form a smooth curve.
around + mandrel for bending
The glassblower rolled the hot glass over a thin mandrel to create a hollow bead.
over + mandrel for shaping hollow forms
Workers wind layers of carbon fibre around the mandrel to build up the rocket body.
After the resin hardens, Ayana slides the finished part off the mandrel in one clean piece.
文法句型
over / around + mandrel
用法筆記
Distinguish from sense 1: here the mandrel gives shape to material formed around it; in sense 1 it merely supports an already-shaped part during cutting.
常見錯誤
3. the central shaft of a rotating tool, like a circular saw or a dentist's grinder
the central shaft of a rotating tool, like a circular saw or a dentist's grinder, on which the cutting disc is fixed.
Owen replaced the worn mandrel on the bench saw before fitting a fresh blade.
Élise locked the dental burr onto a tiny mandrel that spins at very high speed inside the handpiece.
subject + lock + tool + onto + mandrel
Apinya checked that the mandrel was tight before pressing the grinder against the metal.
Ari dropped the angle grinder once, and now the bent mandrel makes the cutting disc wobble.
文法句型
mandrel + of + tool
用法筆記
Subject is usually a tool name (saw, grinder, drill). Different from sense 1: this mandrel belongs to the tool itself, not to the workpiece being shaped.
常見錯誤
4. any rotating bar that acts as the line of turning for a larger spinning part, su
any rotating bar that acts as the line of turning for a larger spinning part, such as a winding drum or a reel.
The film reel turns on a thin mandrel powered by a small motor at the back of the projector.
Defne loaded the empty spool onto the mandrel and watched the cable wind smoothly onto it.
load + spool + onto + mandrel
Inside the printer, the paper roll rotates around a long plastic mandrel.
When the heavy cable drum began to wobble, Alessia tightened the loose mandrel with a long wrench.
文法句型
mandrel + of + larger machine
用法筆記
Subject is typically a reel, drum, spool, or roll that turns around the mandrel. Use this sense when the mandrel is mainly an axis of rotation rather than a part-holding spindle (sense 1) or a shaping core (sense 2).