Towa TM-3 Bobbin Tension Gauge Longarm Bobbin Case Meter

The Towa TM-3 Bobbin Tension Gauge is the industry-standard tool for measuring and setting precise, repeatable longarm bobbin tension. The TM-3 replaces the traditional “drop test” method with an objective numeric tension reading, enabling consistent, reproducible bobbin tension settings across thread types, batting changes, and machine adjustments.

Frequently Asked Questions

Why is the Towa TM-3 the industry standard for bobbin tension?

The TM-3 converts the subjective drop test into an objective numeric measurement. Instead of “it feels about right,” you get a precise number (e.g., 180–220 for standard longarm tension) that can be reproduced exactly every time. This consistency is especially valuable when changing thread types, switching battings, or training new operators.

How is the TM-3 used?

Load a pre-wound bobbin into your bobbin case (or a dedicated measurement case), place the case in the TM-3 gauge, and pull the thread. The gauge displays a numeric tension reading. Adjust the bobbin case screw until the reading is in the desired range.

What is the correct tension reading for a longarm?

Standard M-size longarm bobbin tension typically reads 180–220 on the TM-3 for most production applications. Specific recommendations vary by machine, thread, and batting — consult your machine manufacturer for guidance.

Does the TM-3 work with all longarm bobbin case formats?

The TM-3 is designed for M-size bobbin cases standard on most commercial longarm machines. Check compatibility with your specific machine model.

Is the TM-3 a one-time purchase?

Yes — the TM-3 is a durable tool designed for long-term studio use with no consumable parts.