40Cr Cylindrical Gear Helical Tooth For 6B Twin-Needle Machine

Appearance Shape
Tooth profile: The contact line of the tooth flank is an oblique line, and this helical tooth design allows for a smoother gear mesh.
Overall shape: Both the big gear and the pinion are cylindrical, with a round hole in the middle for mounting on the shaft. The diameter of the large gear is significantly larger than that of the small gear, and the thickness is relatively thicker, and there are evenly distributed helical teeth.

Structural Parameters
Helix angle: The helix angle is suitable for the 6B double-needle machine between 8° and 25° to ensure smooth transmission and moderate axial force.
Modulus: Based on the transmission requirements of 6B two-needle machine, the module is made in the common range of 1.5 - 4 to meet the power transmission and speed matching.
Number of teeth: According to the design of the transmission ratio of the double-needle machine, the number of teeth of the large gear is more than that of the pinion to ensure the coordinated operation.

Material Properties
High strength: Considering that the gear needs to bear a large force when the 6B double-needle machine is working, the gear is made of high-quality alloy steel, and after heat treatment, the surface is hard and tough, which can resist impact and heavy load.
Good wear resistance: After finishing, the surface of the gear is smooth, which reduces the coefficient of friction, reduces wear and extends the service life in long-term operation.

Transmission Performance
Smooth transmission: When the 6B double-needle machine is running, the gradual meshing of the helical teeth makes the power transmission smooth, reduces vibration and noise, and ensures the stable sewing work.
Strong bearing capacity: Multiple gear teeth participate in the meshing at the same time during operation, and the large and small gears can be matched to share the load and meet the power needs of the double-needle machine under different sewing conditions.

DINGSCO Precision Gear Solutions — Pioneering Force in Equipment Transmission

Core Advantages: Cutting-Edge Equipment × Digitalized Processes × Full-Cycle Services

As a leading precision gear manufacturer, DINGSCO specializes in customized production of micro high-precision spiral bevel gears and hypoid gears through our multiple CNC seven-axis five-linkage spiral bevel gear grinding/milling machines and Gleason spiral bevel cutter technology. With DIN 6 precision class (tooth profile error ≤ ±5μm), 95%+ transmission efficiency, and ultra-high reduction ratios, we deliver reliable transmission solutions for robotics, motor drives, new energy vehicles, and more.

Why Choose DINGSCO?
✅ High Precision: Achieving DIN 6 grade accuracy, leading the industry in controlling tooth profile errors.

✅ High Efficiency: With a single - stage reduction ratio of up to 300:1, and a transmission efficiency of over 95%.

✅ Durability: 40% lower lifecycle cost, <0.5% failure rate.
✅ Fast response: The digital process can shorten the delivery cycle to 20 working days.

Contact Us Soon for gear optimization proposals and 3D meshing simulations!

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 Changsha Senjie Gear Co., Ltd (abbreviated as "CSG") in 2016. CSG is a production R&D base specializing in professional design, reserch, manufacture and sales of high-quality small module spiral bevel gears and high reduction hypoid gears and cylindrical gears. In 2023, Hunan Dinghan New Material Technology Co., Ltd. was established as a specialized international export business department. CSG has strong scientific research and development capabilities and is also equipped a full set of advanced equipment including seven-axis five-linkage CNC spiral bevel gear grinding machines and gear milling machines. By making the best use of the scientific and technological achievements and equipment of the Gear Research Institute of Central South University, machanical processing, heat treatment and testing. We have developed high-quality products featuring high reduction, high speed, heavy load, low noise and less teeth for users.

With the quality policy of "scientific and technological innovation, quality first, being first-class firm and customer‘s satisfaction", we have won the trust of well-known domestic and abroad enterprises with stable and excellent quality. It is committed to be a pioneer of the industry of China's small-module spiral bevel gears, and is dedicated to providing service for any related industry requiring industrial robots, CNC turning and milling compound power tool turrets, industrial sewing machines, reducers, bicycles, power tools and aeromodelling. We sincerely look forward to your cooperation!