General

Use these to keep your bobbins with the spool they're wound from.  The keepers will prevent the bobbin from unspooling.  The tabs help with inserting and removing the bobbin.  I designed the leg length to be compatible with my Wall Control spool holder design.

Compatibility

I've tested this with the following bobbins

• Standard Janome bobbins

• Brother SA156 bobbins

• Class 15 bobbins

• Class 66 bobbins

and with following spools

• Mettler 500m

• Gutermann 100m

• Gutermann 250m

• Gutermann 500m

• Gutermann 1000m

• Coats & Clark 250yd

• Coats & Clark 500yd

It's quite likely that if you have a different spool or bobbin, it'll work fine as long as it's designed for retail machines.

Printing and Assembly

These print in two parts so that no support is required.  Lay them flat on the side.  I personally like putting all the legs into and assembly and all the bodies into an assembly and then printing in "by object" mode.

Once they're printed, you can assemble them dry or use a dab of superglue.  It should be a tight fit and there should be some positive retainment but superglue will do an even better job keeping them together.