TBM Telemetry — Main Bearing Life Check
Main Bearing Life Check for tunnel project performance management.
The main bearing is the TBM's heart and the cube law is its cardiologist: running 15% over design load consumes life 50% faster. Grease analysis and vibration trending earn their keep here — an in-tunnel bearing replacement is a six-month story told in a cavern excavated for the purpose.
Formula
Note: Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
Main Bearing Life Check for tunnel project performance management. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About TBM Telemetry — Main Bearing Life Check
TBM Telemetry — Main Bearing Life Check computes the governing relationship consumed = hours × (load)³ / L10 live as you type. The main bearing is the TBM's heart and the cube law is its cardiologist: running 15% over design load consumes life 50% faster. Grease analysis and vibration trending earn their keep here — an in-tunnel bearing replacement is a six-month story told in a cavern excavated for the purpose. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use TBM Telemetry — Main Bearing Life Check
- 1Enter your values — Boring hours to date, Bearing L10 design life, Average load vs design, Drive remaining (boring hours) (sensible defaults are pre-filled).
- 2Read the live results: Life consumed, Projected at drive end.
- 3Check the "with your numbers" line to see consumed = hours × (load)³ / L10 substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use TBM Telemetry — Main Bearing Life Check?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula consumed = hours × (load)³ / L10 with authoritative sources cited on the page (Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance)
- ✓The main bearing is the TBM's heart and the cube law is its cardiologist: running 15% over design load consumes life 50% faster.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the tbm telemetry — main bearing life check use?+
It evaluates consumed = hours × (load)³ / L10, exactly as published. Sources: Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
The main bearing is the TBM's heart and the cube law is its cardiologist: running 15% over design load consumes life 50% faster. Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
When is this calculator the right tool for the job?+
Main Bearing Life Check for tunnel project performance management. A free tbm performance & tunnelling tool. Grease analysis and vibration trending earn their keep here — an in-tunnel bearing replacement is a six-month story told in a cavern excavated for the purpose. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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