Thread Specification Database

Look up metric and imperial thread data from local standards and local rule tables.

All tools free forever

Tip: Pick a thread designation for tap drill and minor-diameter references.

Results

10
Major diameter (mm)
1.5
Pitch (mm)
8.5
Tap drill (mm)
8.16
External minor dia (mm)
8.38
Internal minor dia (mm)
16.93
Threads per inch (TPI)
ISO Metric Coarse / ISO 公制粗牙
Standard
Linked Parameter Diagram
threadDatabase

Input / Output Bars

Inputs

No numeric data

Outputs

Major diameter10
Pitch1.5
Tap drill8.5
External minor dia8.16

Geometry View

Reference Lookup View

threadDatabase
Major diameter
10
Pitch
1.5
Tap drill
8.5
External minor dia
8.16

Tool role and boundaries

Thread Specification Database is not a one-shot number widget. It is an engineering baseline tool for real shop-floor decisions. Look up metric and imperial thread data from local standards and local rule tables. This tool focuses on thread and hole features where tolerance stack-up and cycle strategy dominate first-pass yield.

Treat every output as a first-pass candidate, not an immediate production command: run defaults first, tune one variable at a time, and record machine, tooling, fixture, and material-lot context.

Fast baseline workflow

  1. Run once with defaults to confirm units and expected behavior.
  2. Lock constraints first (dimensions, machine limits, setup boundaries), then tune controls.
  3. Change one key variable per iteration and record why it changed.
  4. Read severity/rule hit first, then execute suggested actions.
  5. Validate first piece with conservative override before moving to target cycle.
  6. Store accepted values with revision tags so shift handoff stays reproducible.

Input strategy

Use a three-layer input model:

  • Constraint layer: dimensions, tolerances, travels, clamping, controller limits.
  • Control layer: speed, feed, engagement, compensation, cycle parameters.
  • Target layer: takt time, cost, scrap risk, tool-change frequency.

A common failure mode is pushing control values before constraints are stable. Lock constraints first, then build a stable operating window with small increments.

Output interpretation

Interpret results in order: primary safety checks first, then stability, then economics.

  1. Safety: no machine, tool, or fixture limit violations.
  2. Stability: load, thermal, and vibration behavior remains controlled.
  3. Economics: cycle and cost align with shift target.

Current focus outputs include Metric/UNC/UNF lookup, Major/minor diameters, Tap drill reference. If numbers conflict with floor behavior, verify units and inputs before changing strategy.

Typical failure modes and fixes

  • Sudden output jump: verify units, decimal precision, and input ordering first.
  • Unexpected trend: inspect workholding, tool condition, and thermal stability before retuning.
  • Big machine-to-machine delta: compare servo behavior, coolant coverage, spindle health, and compensation tables.
  • Shift handoff instability: enforce revision logging for program, tool, and parameter timestamp.

Keep rollback points and use single-variable increments to avoid coupled uncertainty.

FAQ

Can outputs be used directly for production?

Not immediately. Validate first piece, then short-run stability, then release to full production.

Why does floor behavior differ from computed values?

This is expected. Material lot, tool wear, thermal state, and machine dynamics all shift outcomes.

When should I recalculate?

Recalculate whenever tooling, fixturing, material lot, controller parameters, or takt target changes.

Final recommendation

Use Thread Specification Database inside a fixed loop: baseline, first-piece validation, single-variable tuning, parameter freeze, and revision tracking. The outcome is not just one result but a repeatable process capability.