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Purpose

FireBolts, a term coined by the Team, are 1/4-20 bolts with E-matches glued in. They are used in Tender Descender modifications and also to ignite pyrotechnically operated pistons on the Team.

Fabrication

FireBolt fabrication is simple. First, purchase 1/4-20 stainless steel machine head cap screws. One by one, perform the following procedure:

  1. Secure the bolt in the chuck of a lathe (head end pointing outward).
  2. Using a 8-32 tap drill size (INSERT DRILL SIZE HERE), slowly drill through the bolt. Use coolant or oil to prevent overheating of the drill bit or part.
    1. During the initial production round, we used a speed of 400 RPM and a feed of about 0.001" per 1-2 seconds.
  3. Tap the hole with an 8-32 tap. (ELABORATE)

      3.  After removing the bolt from the chuck, secure it in a pair of pliers.
      4. Use a grinder to de-burr the end of the screws, which may have sharp pieces poking out of them.

     5. Glue 1-2 E-matches into the hole such that the E-match heads are on the opposite side as the screw head. (Details to be added later)

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