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Rotary hooks

 

Rotary Hook

Rotary hooks rotate twice every time the needle comes down, so if you run your machine at 700 stitches per minute the hook spins at 1400 stitches per minute (SPM). The interior of the Hook has a rail that slides in a raceway and holds the hook together. There are no bearings, so the rail and raceway are metal on metal. This is the only point on the machine that most manufactures recommend you lubricate every four hours of use. ​Rotary hooks may need to be replaced at around 3 to 5 years, depending on use and maintenance of the machine.

 

 

Symptoms that could be caused by a worn or damaged Rotary hook are:

  • Birds nesting

  • Broken needles

  • Fraying thread

  • The machine not being able to maintain timing

​Note: These same symptoms may be caused by other issues also.​Note: The Toyotas and some Tajimas will sew with generic Rotary Hooks but may sew better with an Eccentric Hook. The difference is that the timing point lifts to meet the needle so that the needle does not have to penetrate the cloth as far. This makes the machine sew better with caps.Note: Rotary hook prices rages from about $18.00 to over $300.00 a piece. Quality does make a difference.

 

Here are two examples:

  • M Size Brother Rotary Hook for 4 and 6 Head Machines - Product ID: SA1648001 - $298.24
  • L Size Economy Rotary Hook - Product ID: KHS12-RY-DE - $18.50

 

My suggestions for Rotary Hooks from SEWMANYPARTS.com:

Note: Refer your your parts books and manufacturers suggestions for your machine.

  • Eccentric Hooks for Toyota and Tajima = L Size Tajima Eccentric Rotary Hook with Oil Tank - Product ID: 050210140017 - $92.00
  • Regular Hooks = L Size Tajima Rotary Hook with Oil Tank - Product ID: 050210170019 - $87.12

 

 



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