Offline shaft alignment calculator

Shaft alignment moves for the millwright at the machine.

Key dial readings, bracket sag, and real foot spacing. ShaftLine gives the shim move, slide direction, validity check, RPM band, and final record without an account or backend.

Get it on Google Play Free for three saved machines. Pro is $9.99 once.
ShaftLine DC feature graphic showing a PASS result and shim moves.

The field loop

Enter the shoot

Rim-and-face, reverse-dial, or laser offsets. Use hand-entered readings and the dimensions on the machine, not a network service.

Make the move

Front add, back remove, slide back. The header stays big enough to read while the wrench is in your hand.

Record the pass

PDF, CSV, and ZIP export. Pro unlocks unlimited saved machines and the signed Final Alignment Record.

Screens from the app

Actual Android emulator captures from the Play screenshot set.

ShaftLine solve screen with PASS result and first-run acknowledgement.
First run shows a solved pump before any payment prompt.
Machine profile and readings form in ShaftLine.
Machine profile, method, dimensions, and readings stay editable.
Final Alignment Record preview in ShaftLine.
The record preview carries the move, as-left band, and disclaimer.
Reference tab in ShaftLine with workflow notes.
Reference notes keep the field workflow close to the calculator.

Export only when the job needs a record.

The solve, machine memory, and report build on the device. Android share intents send only the finished PDF, CSV, or ZIP to the destination the user chooses.

Final Alignment Record - P-CW-3A

Move: FRONT ADD 7 mil

Move: BACK REMOVE 2 mil

Slide: BACK TOWARD 1 mil

As-left: offset 1.5 / 2.0 mil, angularity 0.40 / 0.50 mil/in.

FAQ

What is ShaftLine DC?

ShaftLine DC is an offline shaft alignment calculator for millwrights. It turns dial readings, bracket sag, and machine dimensions into exact shim and slide moves.

Does ShaftLine DC replace a laser alignment tool?

No. It is a field aid that solves geometry from readings you enter. It is not a calibrated instrument or an OEM sign-off.

Does ShaftLine DC need internet?

No. The solve, machine memory, and records run on the device. Only Play Billing and user-selected share targets may use network outside the compute path.