Machining & Configurations for Tooling Columns
AMROK® tombstones, tooling columns, and plates are manufactured to the highest precision and quality standards with our precision tolerances.
- Inserts allow positioning and clamping in every hole with co-axial positioned bushings.
- Assures high wear resistance and replaceability with hardened precision bushings.
- Replacement bushings and insert kits with an extraction tool are offered if needed.
|Flatness (tombstones & plates)||.0005 / 12x12|
|Parallelism (plates)||.0005 / 12 Max .002 total|
|Perpendicularity||.0008 / 12 Min .001, Max .002/48|
|Surface Finish||63 RMS|
|Face Thickness||≤18” = ±.001, >18” = ±.002|
|Tapped Holes (non accumulative)||±.005|
|Precision Bushing I.D.||-0 / +.0006|
|Precision Bushing Concentricity||0.0001|
|Bored or Precision Bushing Hole to Adjacent Hole||±.0005|
|First Row Bushing Hole Location from Datums||±.001, ±.002 (Epoxy Mineral tombstones)|
|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)
Tolerance & Machining Options
For maximum flexibility, choose a precision grid. AMROK® grids are typically machined to the industry standard 2-inch spacing, but custom spacing is available upon request. Alpha-numeric labeling makes it easy to relocate fixturing components on the grid. Each hole features a hardened threaded insert beneath a precision bushing and can be used for both locating and mounting.View Details