Brother / Jack Check Spring Standard 145519-001
Industry Standard Check Spring for Brother / Jack Sewing Machine.
Part number 145519-001.
Also known as Part number S02620-001
This Check Spring is used widely though out the industry.
Especially on Brother Drop Feed walking foot machines.
Trojan Sewing Machines Supply Equivalent Plain Sewer & Needle Feed Lockstitch Machines.
Model’s Jack fully Electronic A4 & A4-7H, Jack JK-9100BS-7, JK-609C and Jack JK-T1900BSK
All with modern designs and the latest technology. All competitively priced.
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Brother Standard Industrial Sewing machine Check Spring.
Part No 145519-001
Also fits many Jack Standard Lockstitch Machines
The idea of the check spring is to check the cotton as it goes around the sew mechanism of the sewing machine.
The check spring allows for the tension of the thread to be lighter with in the sewing cycle, so helps considerably with pucker on lighter fabrics.
The check spring is a vital component when it comes to achieving a balanced stitch on the item you are sewing.