Countersink Calculator
Calculates depth to the tip of the countersink based on major diameter and included angle.
Angle (A)Included
deg
deg
Diameter (D)Major Ø
Unit:
in
DepthTo Tip
Unit:
in
Formula used: Depth = (D / 2) / tan(A / 2). Ensure consistent units.
Countersink Z-Offset
Calculates the required Z-axis wear offset to achieve the target countersink diameter.
Angle (A)Included
deg
deg
Measured DiameterCurrent Ø
Unit:
in
Target DiameterDesired Ø
in
Z-Axis AdjustmentWear Offset
in
Negative values indicate moving the tool closer to the part (cutting deeper). Positive values indicate backing the tool away.
Advanced True Position
Calculates positional deviation, MMC bonus tolerance, and Pass/Fail status.
X-Axis ErrorDeviation (ΔX)
Unit:
in
Y-Axis ErrorDeviation (ΔY)
in
Measured True Position
in
Total Allowed TP
in
Formula used: TP = 2 × √(ΔX² + ΔY²)
Speeds & Feeds
Calculates Spindle Speed (RPM) and Feed Rate (IPM) for milling operations.
Surface FootageSFM
ft/min
Tool DiameterMajor Ø
in
Flute CountTeeth
qty
Chip LoadIPT
in/tooth
Spindle SpeedResult
RPM
Feed RateResult
IPM
Tap Drill Finder
Finds standard drill sizes for ~75% thread engagement (Cut) and standard displacement (Form).
Thread Size
Tap Type
Required Drill Size
Note: Cut tap sizes target general purpose ~75% thread engagement. Form tap holes are critical; always verify with your tooling manufacturer (like OSG or Guhring) if machining exotic alloys.
Drill Size Finder
Enter any size (e.g., .250, 1/4, E, #7, 6.8mm) to find matching and adjacent drills.
Search Input
Next Smaller (-)
Exact / Closest Match
Next Larger (+)
Sine Plate Calculator
Calculates the required gauge block stack height for a given angle.
Sine Bar LengthDistance between cylinders
in
Required AngleDecimal Degrees
deg
Gauge Block HeightStack Dimension
in
Formula used: Height = Length × sin(Angle)
Drill Point Depth
Calculates the extra Z-depth needed for the drill tip to achieve full diameter.
Point Angle (A)e.g., 118° or 135°
deg
deg
Drill Diameter (D)Major Ø
Unit:
in
Full Dia. Target Depth(Optional)
in
Tip Length Only
in
Total Z-Depth to Program
in