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Picture of 3/8th Marlinspike
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I made this marlinspike to make paracord knot work easier. The turkshead knot at the top acts as a knob which fits into your palm. I machined it from 3/8" aluminum bar. You can read more about marlinspikes below.
  
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Marlinspike (/ˈmɑrlɨnspaɪk/; sometimes marlin spike, marlinespike, or the archaic marlingspike/marling-spike) is a tool used in marine ropework.

Shaped in the form of a polished metal cone tapered to a rounded or flattened point, they aid in such tasks as unlaying rope for splicing, untying knots, drawing marline tight using a marlinspike hitch, and as a toggle joining ropes under tension in a belaying pin splice.

Most marlinspikes are 6 to 12 inches long, but may reach 2 feet and more for working heavy cables and ropes. They are usually made from iron or steel, whereas fids, similar in shape and function, are formed from wood or bone. The marlinspike may be a separate tool or one item on a pocket knife.

Sailors who become proficient at knot tying, splicing, and sewing using the marlinspike are said to have mastered marlinespike seamanship, earning them the right to be known as marlin spikes or marlinspike seamen.

Source: Wikipedia

Step 1: Machine the point

Picture of Machine the point
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I offset my lathe carriage to 5 degrees. I then ran the cutting bit back and forth until a point formed. You don't want the tip too sharp otherwise it will pierce paracord rather than slip around it.  
 
Made this out of half a knitting needle. thanks

As nice done and traditional as that knot is for a Marlinspike you could also make a round knob out of some exotic wood. It would feel much better on the palms.

Great tutorial. I just picked up an old lathe a few weeks ago and am antsy about doing a newbie project on it. Still learning how to make tooling for it (and failing).

kz11 year ago

Great Instructable. Seeing that chuck sticking out of the three jaw reminded me of what a good job my machine shop instructor did in preventing students from developing that hazardous habit. The third time he caught a student leaving a key in the chuck, they were expelled on the spot and not allowed to continue the course. Only happed to one guy. The rest of us were made believers. :-)

sweet!!!

That is awesome :), I just love your metal projects.

jmwells1 year ago
Great tutorial. Great history. Minor omission, best used with a sailors palm.