Towa TM-3 Bobbin Thread Tension Gauge Longarm M Size

The Towa TM-3 Bobbin Thread Tension Gauge — M Size is the most important diagnostic tool in any longarm studio — measuring bobbin case tension in precise, repeatable numerical units rather than subjective “pull testing.” With a TM-3, you can set a target tension number, record it, and reproduce it exactly at the start of every production session. Proper bobbin tension is the single most impactful variable in longarm stitch quality, and the TM-3 eliminates guesswork from this critical adjustment entirely.