Bearing Temperature Trend Tracker
Log bearing housing temperature readings, see the wear trend and get a projected date when the 95 °C limit will be reached.
Readings stay in your browser (localStorage) — nothing is uploaded.
Straight-line (least-squares) extrapolation of your logged readings to the 95 °C alarm threshold (warning at 80 °C). A low R² means the trend is noisy — log more readings before trusting the projection.
Field notes from maintenance practice
Log at the same spot (paint-mark it) with the same instrument, and record ambient too: a bearing that runs 'ambient + 35 °C' is telling you more than its absolute number, since summer alone can push an okay bearing over a naive alarm. Each 10–15 °C above ~70 °C roughly halves grease life — temperature trend and relubrication schedule belong together. The default action limit of 95 °C comes from common practice: grease-lubricated bearing housings alarm around 90–100 °C (standard greases age fast beyond ~70–80 °C; many plants set warn at 80 °C and trip at 95–100 °C); adjust it if your OEM or procedure specifies otherwise.
Linear extrapolation is honest only when the R² is decent (≥ 0.7) and degradation is steady. Temperature is a lagging indicator — by the time a bearing runs hot the damage mechanism is usually established — so a slow multi-week warming trend is precious early warning, while a fast rise demands shutdown, not curve fitting. If the last reading jumps far off the line, re-measure before believing it — measurement technique drifts too.
Sources & references
- SKF / Schaeffler bearing temperature and grease life guidance
- API 670 — machinery protection systems (temperature alarm philosophy)
Trend screening only — confirm with a proper inspection before running equipment to a projected limit.
Bearing Temperature Trend Tracker for maintenance and reliability teams: Log bearing housing temperature readings, see the wear trend and get a projected date when the 95 °C limit will be reached. Free, private (everything runs in your browser) and ready for daily plant use.
About Bearing Temperature Trend Tracker
This tracker is a remaining-useful-life (RUL) estimator for bearing housing temperature. Log a dated reading whenever you measure; the tool fits a least-squares straight line through your history and projects when it will cross the 95 °C action limit (warning at 80 °C) — turning scattered measurements into a forecast date you can plan parts and downtime around.
How to use Bearing Temperature Trend Tracker
- 1Enter each dated measurement as you take it — readings persist in your browser between visits.
- 2Adjust the alarm (and warning) threshold to your OEM or procedure limit if it differs from the default.
- 3Read the fitted trend, R², days-to-alarm and the projected date — then plan parts and downtime around that date.
Why use Bearing Temperature Trend Tracker?
- ✓Log bearing housing temperature readings, see the wear trend and get a projected date when the 95 °C limit will be reached — computed instantly with the standard formula
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser — readings and asset data never leave your device
- ✓Niche-specific defaults and thresholds for bearing housing temperature, traceable to the cited standards
Frequently asked questions
What limit should trigger action for bearing housing temperature?+
The widely used limit is 95 °C (common practice: grease-lubricated bearing housings alarm around 90–100 °C (standard greases age fast beyond ~70–80 °C; many plants set warn at 80 °C and trip at 95–100 °C)). Set a warning at 80 °C so parts and labour are ready before the alarm. Your OEM manual or internal procedure overrides the generic figure.
Bearing runs at 85 °C since commissioning — failure risk or just its personality?+
Possibly normal for its load and speed — what matters is change. A bearing that has run 85 °C steadily for years is stable (though its grease interval must be matched to that temperature); the same 85 °C reached by a 1 °C/week climb is a developing failure. That's why this tool trends rather than judges absolutes. Verify the grease spec suits 85 °C continuous; many standard greases don't.
How many readings before the projection is trustworthy?+
At least 4–6 spread over a meaningful fraction of the asset's life, with a fit R² of about 0.7 or better. Two points always make a perfect line — that is curve fitting, not condition monitoring. Keep measurement conditions (load, temperature, location) consistent.
Is straight-line extrapolation valid for wear?+
It is the standard first approximation for steady-state degradation, and it is deliberately conservative to act on. Many failure modes accelerate near the end (bathtub curve), so treat the projected date as the latest acceptable intervention date, not a promise.
Where is my logged data stored?+
Entirely in your browser's localStorage on this device — nothing is uploaded to any server. Export or note critical values elsewhere if you need a permanent maintenance record shared across a team.
Embed Bearing Temperature Trend Tracker on your website
Want Bearing Temperature Trend Trackeron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/bearing-temperature-trend-tracker" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Bearing Temperature Trend Tracker — ToolJolt" loading="lazy"></iframe>Related tools
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