Compact design with easy-to-read LED display Provides 12-times the measuring range of analog Towa units Interchangeable inserts allow body to be used for Standard (L-Type) and Large (M-Type) bobbin cases (Sold Separately) Measures tension of both bobbin case thread and upper thread with one compact unit from 1mN to 5000mN Battery operated (3 AAA batteries, not included)

The Towa bobbin case is the very best for your long arm. It consistently provides the smoothest thread delivery (and thus the finest results on the quilt) of any brand bobbin case we have tested. Order two! Always have a back up bobbin case.  

This high quality bobbin case will also fit many industrial sewing machines using "M" size (1" diameter) bobbins. Please verify the model number fits your non-Gammill machine by checking with your machine's manufacturer.

Guideline Setting Numbers for Top Thread Tensions:
Classic Rayon - 150 
Polyneon - 170 
Frosted Matt - 170 
Metallic - 180 

Guideline Setting Numbers for Bobbin Case Tensions:
Everyday Embroidery - between 22  to 24 
Cap Embroidery - 25 

The numbers above are intended to be used as a guideline and may need to be adjusted up or down depending upon your specific machine. Be sure to set your gauge to the  (gram force) setting by using the toggle button in the upper right corner of your gauge.

Brother B745, B746, B747, B791, B792, B797, B798, 

Consew 120, 145R, 146RB, 175RB, 199RB, 205RB, 206RB,

Gammill Quilters, 

Bernina Quilters

Handi Quilter, 

Juki DDL-201, DDL-201S, DDL-201H, DDL-560, DNU-241, DNU-241HS, DNU-1541, LZH-1290, -

Nakijima 280L, 

Seiko STH-8BLD, 

Singer 531-8BL, 531B - T

acsew T280RB, GC6-7, 

Aternative number 10018, BC-DBM2-NBL