---
type: "person"
name: "Nina Frei"
role: "Senior Maintenance Engineer"
team: "Production"
projects: ["line-3-retrofit"]
decisions: 6
open_actions: 3
source: "sources/00-staff-directory"
tags: ["person"]
---

# Nina Frei

Nina Frei is Senior Maintenance Engineer at Bergwerk Präzision AG. Ask Nina about: spindles, calibration, machine vendor contacts.

## Open actions

- [ ] Prepare the spindle bearing swap for the retrofit window (due 30.10.2026) · [[projects/line-3-retrofit|Line 3 retrofit]] · from [[sources/2026-09-14-weekly-production-meeting|Weekly production meeting]]
- [ ] Hand over the sensor alarm thresholds to Lukas Brunner (due 13.11.2026) · [[projects/line-3-retrofit|Line 3 retrofit]] · from [[sources/2026-10-28-line-3-retrofit-check-in-before-the-stop|Line 3 retrofit: check-in before the stop]]
- [ ] Record a short video of the calibration with the reference mandrel (due 20.11.2026) · [[projects/line-3-retrofit|Line 3 retrofit]] · from [[sources/2026-10-19-knowledge-handover-nina-frei|Knowledge handover: Nina Frei, maintenance]]

## Decisions

- 20.04.2026 · [[decisions/2026-04-20-retrofit-line-3-instead-of-buying-a-new-machining-centre|Retrofit Line 3 instead of buying a new machining centre]]
- 20.04.2026 · [[decisions/2026-04-20-fit-vibration-sensors-on-all-four-spindles-of-line-3-so|Fit vibration sensors on all four spindles of Line 3, so bearing wear shows up before a…]]
- 18.05.2026 · [[decisions/2026-05-18-replace-the-bearings-on-all-four-spindles-of-line-3-during|Replace the bearings on all four spindles of Line 3 during the retrofit window, not one…]]
- 14.09.2026 · [[decisions/2026-09-14-the-line-3-retrofit-window-is-02-11-2026-to-13-11-2026-line|The Line 3 retrofit window is 02.11.2026 to 13.11.2026; Line 3 restarts on 16.11.2026]]
- 19.10.2026 · [[decisions/2026-10-19-spindle-checks-on-line-3-happen-every-month-and-after-every|Spindle checks on Line 3 happen every month and after every crash, using Nina's five…]]
- 28.10.2026 · [[decisions/2026-10-28-line-3-runs-at-80-feed-rate-in-the-first-week-after-the|Line 3 runs at 80 % feed rate in the first week after the restart]]

## Done actions

- [x] Add the vibration readings to the maintenance log (due 29.05.2026) · [[projects/line-3-retrofit|Line 3 retrofit]] · from [[sources/2026-05-18-ticket-tck-0412-spindle-vibration|TCK-0412: Line 3 spindle 2 vibration and surface marks]]
- [x] List the spare parts to stock before the retrofit (due 30.09.2026) · [[projects/line-3-retrofit|Line 3 retrofit]] · from [[sources/2026-04-20-line-3-retrofit-planning|Line 3 retrofit: planning meeting]]

## Projects

- [[projects/line-3-retrofit|Line 3 retrofit]]

## Mentioned in

- 12.01.2026 · [[sources/00-staff-directory|Staff directory: Bergwerk Präzision AG]]
- 20.04.2026 · [[sources/2026-04-20-line-3-retrofit-planning|Line 3 retrofit: planning meeting]]
- 18.05.2026 · [[sources/2026-05-18-ticket-tck-0412-spindle-vibration|TCK-0412: Line 3 spindle 2 vibration and surface marks]]
- 14.09.2026 · [[sources/2026-09-14-weekly-production-meeting|Weekly production meeting]]
- 12.10.2026 · [[sources/2026-10-12-onboarding-note-production|Onboarding note: your first week in production]]
- 19.10.2026 · [[sources/2026-10-19-knowledge-handover-nina-frei|Knowledge handover: Nina Frei, maintenance]]
- 26.10.2026 · [[sources/2026-10-26-iso-audit-preparation|ISO 9001 recertification: audit preparation]]
- 28.10.2026 · [[sources/2026-10-28-line-3-retrofit-check-in-before-the-stop|Line 3 retrofit: check-in before the stop]]