Large Hook Vs. Standard Hook

[Andrew Chee]

Hi, I see some machines advertised where some sub models have standard hooks and some have large hooks. What practical difference does that make on the machine? Thanks.

Andrew

[Wizcrafts]

Hi, I see some machines advertised where some sub models have standard hooks and some have large hooks. What practical difference does that make on the machine? Thanks.

Andrew

Andrew;

A standard hook uses a bobbin that is about the same size as a Singer 15 class machine: 3/4" by just under 3/8". You can see those bobbins at any local sewing supplies store, including Joann Fabrics. They hold a pretty fair amount of thin thread, such as is used in sewing garments.

A large hook holds a bobbin that is 1 inch in diameter by 11/32" high. It holds about 50% more thread. This extra capacity allows garment manufacturers to sew more between bobbin loads. It also allows upholsters and leather crafters to use #138 thread and not run out after a couple belts are sewn.

Juki is a horse of another color. Some of their big bobbin machines have a double capacity hook and special bobbins that hold about twice the amount of a standard one.

[Andrew Chee]

Andrew;

A standard hook uses a bobbin that is about the same size as a Singer 15 class machine: 3/4" by just under 3/8". You can see those bobbins at any local sewing supplies store, including Joann Fabrics. They hold a pretty fair amount of thin thread, such as is used in sewing garments.

A large hook holds a bobbin that is 1 inch in diameter by 11/32" high. It holds about 50% more thread. This extra capacity allows garment manufacturers to sew more between bobbin loads. It also allows upholsters and leather crafters to use #138 thread and not run out after a couple belts are sewn.

Juki is a horse of another color. Some of their big bobbin machines have a double capacity hook and special bobbins that hold about twice the amount of a standard one.

So hook size simply refers to bobbin size and not some other function? That's good to know. Thanks.

Andrew

[Wizcrafts]

So hook size simply refers to bobbin size and not some other function? That's good to know. Thanks.

Andrew

Negatory Red Rider.

A large hook-shuttle usually has more clearance around the bobbin case, allowing you to use thicker thread.

[tomasdeo]

Negatory Red Rider.

A large hook-shuttle usually has more clearance around the bobbin case, allowing you to use thicker thread.

I think that also the thread tension with larger hooks is more constant with a large hook, so the seam quality is better. Dürkopp has posted some information with pictures about that.