a-parametric-bearing-pillow-block

// A Parametric Bearing Pillow Block
// A bearing pillow block, also known as a plummer block or pillow block bearing, is a pedestal used to provide support for a rotating shaft with the help of compatible bearings and various accessories. Housing a bearing, the pillow block provides a secure and stable foundation that allows the shaft to rotate smoothly within its machinery setup. These components are essential in a wide range of mechanical systems and machinery, playing a key role in reducing friction and supporting radial and axial loads.


// Define constants such as length, width, height, counter-bore depth and diameter, bearing diameter, hole location padding, and more
length = 6
width = 4
height = 1
cbDepth = .25
cbDia = .7
holeDia = .375
padding = 1.5
bearingDia = 3

// (Needs to be updated). Sketch the block and extrude up to where the counterbore diameter starts.
block = startSketchOn('XY')
  |> startProfileAt([-width / 2, -length / 2], %)
  |> lineTo([width / 2, -length / 2], %)
  |> lineTo([width / 2, length / 2], %)
  |> lineTo([-width / 2, length / 2], %)
  |> close(%)
  |> hole(circle({
       center = [
         -(width / 2 - (padding / 2)),
         -(length / 2 - (padding / 2))
       ],
       radius = holeDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         -(width / 2 - (padding / 2)),
         length / 2 - (padding / 2)
       ],
       radius = holeDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         width / 2 - (padding / 2),
         length / 2 - (padding / 2)
       ],
       radius = holeDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         width / 2 - (padding / 2),
         -(length / 2 - (padding / 2))
       ],
       radius = holeDia / 2
     }, %), %)
  |> hole(circle({
       center = [0, 0],
       radius = bearingDia / 2
     }, %), %)
  |> extrude(height - cbDepth, %)

// Create a second sketch that creates the counterbore diameters and extrude the rest of the way to get the total height. Note: You cannot use startSketchOn(block, 'end'). The extrude lives outside the bounds, and the engine will not execute. This is a known issue.
secondHalf = startSketchOn({
       plane = {
         origin = { x = 0, y = 0, z = height - cbDepth },
         xAxis = { x = 1, y = 0, z = 0 },
         yAxis = { x = 0, y = 1, z = 0 },
         zAxis = { x = 0, y = 0, z = 1 }
       }
     })
  |> startProfileAt([-width / 2, -length / 2], %)
  |> lineTo([width / 2, -length / 2], %)
  |> lineTo([width / 2, length / 2], %)
  |> lineTo([-width / 2, length / 2], %)
  |> close(%)
  |> hole(circle({
       center = [
         -(width / 2 - (padding / 2)),
         -(length / 2 - (padding / 2))
       ],
       radius = cbDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         -(width / 2 - (padding / 2)),
         length / 2 - (padding / 2)
       ],
       radius = cbDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         width / 2 - (padding / 2),
         length / 2 - (padding / 2)
       ],
       radius = cbDia / 2
     }, %), %)
  |> hole(circle({
       center = [
         width / 2 - (padding / 2),
         -(length / 2 - (padding / 2))
       ],
       radius = cbDia / 2
     }, %), %)
  |> hole(circle({
       center = [0, 0],
       radius = bearingDia / 2
     }, %), %)
  |> extrude(cbDepth, %)