Window Frame Tombstones

Window frame tombstones provide machining of parts in both front and back with a plain-faced, precision machined surface.

Key Features

  • Grid holes, bushings, and inserts are available for 1/2" systems
  • Hardened, threaded inserts allow for clamping in every hole while offering quick and easy replacability
  • Hardened, precision bushings are accurately located to ensure easy locating coupled with high wear resistance
  • Replacement bushings and insert kits with an extraction tool are available upon request

CAD Downloads: CAD download is for a plain face tombstone, all measurements are in inches unless otherwise noted, all weights are in pounds and include base plate.

Tolerance Precision
Flatness (tombstones & plates).0005 / 12x12
Parallelism (plates).0005 / 12 Max .002 total
Perpendicularity.0008 / 12 Min .001, Max .002/48
Surface Finish63 RMS
Face Thickness≤18” = ±.002, >18” = ±.003
Tapped Holes (non accumulative)±.005
Precision Bushing I.D.+0.0013 / +0.0007
Precision Bushing Concentricity0.0001
Bored or Precision Bushing Hole to Adjacent Hole±.0005
First Row Bushing Hole Location from Datums±.002
Bored or Precision Bushing Hole Spacing (non accumulative) 0-10 ±.0005, 10-20 ±.0008, 20-30 ±.0010, 30-40 ±.0012
(for aluminum, add 50% to these tolerances)

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