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2. Bolt cutter - Wikipedia

   en.wikipedia.org/wiki/Bolt_cutter

   A bolt cutter, sometimes called bolt cropper, is a tool used for cutting bolts, chains, padlocks, rebar and wire mesh. It typically has long handles and short blades, with compound hinges to maximize leverage and cutting force. A typical bolt cutter yields 20 kilonewtons (4,500 lb f) of cutting force for a 250 newtons (56 lb f) force on the ...

3. Hobbing - Wikipedia

   en.wikipedia.org/wiki/Hobbing

   A hob — the cutter used for hobbing. Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets using a hobbing machine, a specialized milling machine. The teeth or splines of the gear are progressively cut into the material (such as a flat, cylindrical piece of metal or thermoset plastic) by a series of cuts made ...

4. Countersink - Wikipedia

   en.wikipedia.org/wiki/Countersink

   Cross-hole countersink cutter. A cross-hole, "Weldon style" or "zero flute" countersink is a cone-shaped tool with a cutting edge provided by a hole that goes through the side of the cone. The intersection of the hole and cone form the cutting edge on the tool. The cone is not truly symmetrical as it is essential that the cone retreats away ...

5. Tap and die - Wikipedia

   en.wikipedia.org/wiki/Tap_and_die

   A die is used to cut or form the male portion of the mating pair (e.g. a bolt ). The process of cutting or forming threads using a tap is called tapping, whereas the process using a die is called threading . Both tools can be used to clean up a thread, which is called chasing. However, using an ordinary tap or die to clean threads generally ...

6. Bolt (fastener) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(fastener)

   A bolt is an externally helical threaded fastener that fastens objects with unthreaded holes together. This is done by applying a twisting force ( torque) to a matching nut. The bolt has an external male thread requiring a matching nut with a pre-formed female thread. [ 1] Unlike a screw, which holds objects together by the restricting motion ...

7. Log bucking - Wikipedia

   en.wikipedia.org/wiki/Log_bucking

   Log bucking. A crew of log buckers with crosscut saws in 1914. [ 1] Bucking is the process of cutting a felled and delimbed tree into logs. [ 2] Significant value can be lost by sub-optimal bucking because logs destined for plywood, lumber, and pulp each have their own value and specifications for length, diameter, and defects.