# Renumber tools for an NC program

Reconcile tool numbers between the machine's tool crib and the job's operations before running the NC program.

Source: https://support.toolingmetrics.com/en/production/guides/renumber-tools-for-nc-program/
Updated: 2026-10-29

**Prerequisites:** A job with operations assigned to tool assemblies, and a machine already assigned to that job.

**Required permission:** Engineering → Jobs — User or above to renumber from the job (Admins on any job; Managers and Users only on the jobs they created); or Production → Machines — User or above to set pocket numbers from the machine's Tool Crib.

Tool numbers (T-codes) have to match on both sides: the job's operations reference a T-code for each tool, and the machine's tool crib assigns a slot number to each physical tool. If the crib changes after the setup sheet was printed — tools swapped, slots reused — the two drift apart and the NC program calls the wrong tool unless they're reconciled. Tooling Metrics handles this from whichever side is authoritative for the situation.

## From Engineering — match the job's operations to the crib

Use this when the machine is already loaded and you want the job's T-codes to follow it.

1. Open the job from **Engineering → Jobs** (or from its project under **Engineering → Projects**, on the **Process** tab).
1. Open the job's **Tool List** tab and click **Renumber** below the list. The button appears only while the job is not yet active or archived. This always works against the crib of the machine already assigned to the job — there's no separate machine-selection step.
1. Review the suggested tool number for each tool assembly used in the job, ranked by whether a matching tool is already loaded in the machine, then by operation order. A row is highlighted if its suggested number differs from what's currently on the operations.
1. Adjust any value directly if needed, then click **Renumber** to apply the numbers across all operations that use each assembly.
1. Regenerate the setup sheet so the operator sees the updated numbers.

See the full ranking rules in [Renumber Tools (Engineering)](https://support.toolingmetrics.com/en/engineering/guides/renumber-tools/).

## From Production — match the crib to the job

Use this when you're loading the machine fresh and the job's T-codes are what should drive slot assignment.

1. Open the job's setup sheet or Tool List and note the T-code for each tool.
1. In **Production → Machines**, open the machine and go to the **Tool Crib** tab.
1. For each tool, click its slot number and set it to match the job's T-code. See [Manage a tool crib](https://support.toolingmetrics.com/en/production/guides/manage-tool-crib/).

## Notes

- If the same tool assembly is used in more than one operation, all of those operations share one slot number — renumbering updates them together.
- Whichever side you renumber from, re-check the setup sheet and the NC program against the machine before running the job.