High-Efficiency Flat Seam Gear Designed For Industrial Sewing Machines

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Payment Terms	T/T
Supply Ability	Negotiable
Delivery Time	(Sample order) 7 days
Packaging Details	According to customers' requests
Material	Steel
Shape	Spiral
Teeth Profile	Gleason
Number Of Teeth	Z=38/19/20/20
Drawing Number	WP41/42/43/44
Service	Customized
Brand Name	DINGSCO
Model Number	According to customers' requests
Certification	ISO 9001
Place of Origin	Changsha, China

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Product Details
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Product Specification


Payment Terms	T/T	Supply Ability	Negotiable
Delivery Time	(Sample order) 7 days	Packaging Details	According to customers' requests
Material	Steel	Shape	Spiral
Teeth Profile	Gleason	Number Of Teeth	Z=38/19/20/20
Drawing Number	WP41/42/43/44	Service	Customized
Brand Name	DINGSCO	Model Number	According to customers' requests
Certification	ISO 9001	Place of Origin	Changsha, China

Let’s talk about the gear system of extra-thick material lockstitch sewing machines—it’s really the heart of how these machines work, right?

These machines are built to handle heavy, dense materials like thick leather, industrial canvas, or even multi-layer composite fabrics, so their gears have to be tough enough to keep up with that high-load, high-frequency workday in and day out.

First, let’s break down their key advantages, since that’s what makes these gears stand out for business use:

Top-tier precision: These gears are machined to be super accurate—think smooth tooth surfaces and perfect meshing when they run. Some even come with shock-absorbing gaskets to cut down on noise, which is a nice plus for workshop environments. When the machine runs at high speeds (which it often does for production), this precision keeps power transmission steady—no weird glitches or errors. That means less material waste, too, and over time, less waste translates to lower overhead costs. It’s a win for both quality and your bottom line.

Large-modulus tooth design: Let’s keep this simple—“large modulus” means the teeth are spaced farther apart, and the roots of the teeth are thicker. Why does that matter? Because when you’re sewing thick materials, the machine needs to transmit a lot of torque (twisting force) to get the needle through those layers. These thick, spaced-out teeth can handle that torque without breaking or bending. And here’s the business side: high-quality, durable gears mean you don’t have to overhaul the machine as often. Fewer overhauls = less downtime, and less money spent on maintenance parts and labor.

Specialized designs for tough jobs: Not all gears here are one-size-fits-all. Some machines use spiral bevel gears, and others have connecting rod thread-lifting mechanisms. These designs do two big things that matter for extra-thick materials: first, they let you get a larger needle pitch (the distance between stitches), which is helpful for thicker fabrics. Second, they give the needle more penetration power—so it can punch through multiple layers of leather or canvas without struggling. That means cleaner stitches, fewer broken needles, and faster sewing times for your production line.

At the end of the day, this gear system is what makes the machine reliable for high-load work. To keep it running well, you need three things: good-quality materials (the gears themselves should be made of strong stuff), precise manufacturing (so everything fits right), and regular maintenance (like oiling and checking for wear). If you’re in the market for one of these machines, pay close attention to those details—gear material, heat treatment (which makes gears stronger), and lubrication design. Getting those right will make sure the machine can handle your high-strength production needs for years.

High-Efficiency Flat Seam Gear Designed For Industrial Sewing Machines
Specification
Material	Steel
Shape	Screw, Spiral
Teeth Profile	Gleason
Accuracy Grade	ISO 4-6 Grade
Number Of Teeth	38/19/20/20
Drawing Number	WP41/42/43/44

Why choose us?

Since 1994, our company has been crafting internal bevel and custom gears, bringing 30 years of industry expertise and precision up to ISO 4-6 standards.
Our team includes a distinguished member of the China Gear Standardization Technical Committee, who holds a doctoral degree, and a graduate student focused on bevel gear research.
Our state-of-the-art factory is equipped with CNC seven-axis, five-linkage spiral bevel gear grinding and milling machines, as well as a full range of advanced production and testing equipment. Let's work together to achieve your gear manufacturing goals!

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory

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Business Type:

Manufacturer,Exporter,Seller 
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Year Established:

1994 


Total Annual:

70 million-100 million
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Employee Number:

50~60 


Ecer Certification：

Verified Supplier 

Our company was formerly known as Changsha Double Star Gear Industrial Co., Ltd, which was established in 1994. It is a directly affiliated university-run enterprise founded by Central South University Professor Zeng Tao, the leading expert on spiral bevel gears in China. It was later renamed as Cha... Our company was formerly known as Changsha Double Star Gear Industrial Co., Ltd, which was established in 1994. It is a directly affiliated university-run enterprise founded by Central South University Professor Zeng Tao, the leading expert on spiral bevel gears in China. It was later renamed as Cha...

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