A surgical drill guide is a tool used in medical procedures to assist in drilling holes to a desired depth, ensuring proper orientation and minimizing intraosseal pressure

// Surgical Drill Guide
// A surgical drill guide is a tool used in medical procedures to assist in drilling holes to a desired depth, ensuring proper orientation and minimizing intraosseal pressure
// Categories: Medical

// Set units
@settings(defaultLengthUnit = mm)

// Define parameters
handleLength = 150
handleWidth = 30
stockThickness = 6
bendRadius = stockThickness * 1.25
bitSize01 = 2
bitSize02 = 3.2
bitLength = 45

// Model a small sheet metal bracket to represent the handle of the drill guide
bracket = startSketchOn(YZ)
  |> startProfile(at = [0, 0])
  |> xLine(length = handleLength, tag = $seg02)
  |> yLine(length = stockThickness, tag = $seg06)
  |> xLine(length = -segLen(seg02), tag = $seg04)
  |> tangentialArc(angle = -60deg, radius = bendRadius, tag = $seg01)
  |> angledLine(angle = tangentToEnd(seg01), length = handleLength / 3, tag = $seg03)
  |> angledLine(angle = tangentToEnd(seg01) + 90deg, length = stockThickness, tag = $seg05)
  |> angledLine(angle = segAng(seg03) + 180deg, length = segLen(seg03), tag = $seg07)
  |> tangentialArc(endAbsolute = [profileStartX(%), profileStartY(%)])
  |> close()
  |> extrude(
       length = handleWidth,
       symmetric = true,
       tagEnd = $capEnd001,
       tagStart = $capStart001,
     )

// Create a cut in the bracket to mount the first bit
bitCut01 = startSketchOn(XZ)
  |> circle(center = [0, segEndY(seg03) + .1], radius = handleWidth / 1.9)
  |> extrude(length = 100)

// Create a cut in the bracket to mount the second bit
bitCut02 = startSketchOn(offsetPlane(XY, offset = 35))
  |> circle(center = [0, segEndX(seg02)], radius = handleWidth / 1.9)
  |> extrude(length = -100)

// Cut the bracket
handle = subtract([bracket], tools = union([bitCut01, bitCut02]))

// Model the support for the first drill bit
bitSupport01 = startSketchOn(offsetPlane(XZ, offset = -segEndX(seg03) - 3))
  |> circle(center = [0, segEndY(seg03) + .1], radius = handleWidth / 1.9)
  |> extrude(length = -15, symmetric = true)

// Model the stem for the first drill bit
stem01 = startSketchOn(bitSupport01, face = END)
  |> circle(center = [0, segEndY(seg03) + .1], radius = bitSize01, tag = $seg10)
  |> extrude(length = bitLength, tagEnd = $capEnd004)
  |> chamfer(
       length = bitSize01 / 3,
       tags = [
         getCommonEdge(faces = [seg10, capEnd004])
       ],
     )

// Negative extrude the clearance hole for the first drill bit
bitClearance01 = startSketchOn(stem01, face = END)
  |> circle(center = [0, segEndY(seg03) + .1], radius = bitSize01 / 2)
  |> extrude(length = -15 - bitLength)

// Model a rotating grip for the first drill bit
grip01 = startSketchOn(offsetPlane(XZ, offset = -segEndX(seg03) + 16))
  |> circle(center = [0, segEndY(seg03) + .1], radius = handleWidth / 1.85, tag = $seg11)
  |> subtract2d(tool = circle(center = [0, segEndY(seg03) + .1], radius = bitSize01))
  |> extrude(length = -10, tagEnd = $capEnd005, tagStart = $capStart003)
  |> fillet(
       radius = 1,
       tags = [
         getCommonEdge(faces = [seg11, capEnd005]),
         getCommonEdge(faces = [seg11, capStart003])
       ],
     )
  |> appearance(color = "#af7b23")

// Model the support for the second drill bit
bitSupport02 = startSketchOn(offsetPlane(XY, offset = -2))
  |> circle(center = [0, segEndX(seg02)], radius = handleWidth / 1.9)
  |> extrude(length = 15)

// Model the stem for the second drill bit
stem02 = startSketchOn(bitSupport02, face = START)
  |> circle(center = [0, segEndX(seg02)], radius = bitSize02, tag = $seg09)
  |> extrude(length = bitLength, tagEnd = $capEnd003)
  |> chamfer(
       length = bitSize02 / 3,
       tags = [
         getCommonEdge(faces = [seg09, capEnd003])
       ],
     )

// Negative extrude the clearance hole for the second drill bit
bitClearance02 = startSketchOn(stem02, face = END)
  |> circle(center = [0, segEndX(seg02)], radius = bitSize02 / 2)
  |> extrude(length = -15 - bitLength)

// Model a rotating grip for the second drill bit
grip02 = startSketchOn(offsetPlane(XY, offset = -3))
  |> circle(center = [0, segEndX(seg02)], radius = handleWidth / 1.85, tag = $seg08)
  |> subtract2d(tool = circle(center = [0, segEndX(seg02)], radius = bitSize02))
  |> extrude(length = -10, tagStart = $capStart002, tagEnd = $capEnd002)
  |> fillet(
       radius = 1,
       tags = [
         getCommonEdge(faces = [seg08, capStart002]),
         getCommonEdge(faces = [seg08, capEnd002])
       ],
     )
  |> appearance(color = "#23af93")


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