High-Precision ISO 4-6 Grade Steel Robot Spiral Gear with Gleason Teeth Profile for Smooth Transmission

What are the characteristics of Robot 0° spiral gear?

A zero-degree helical gear, also known as a robot helical gear, is a special type of helical conical gear characterized by a helix angle at the center of zero degrees. It combines certain advantages of both straight conical gears and helical conical gears.

Advantages

Let me walk you through the key advantages of zero-angle helical conical gears—they’re really standing out in industrial applications, and here’s why:​

First off, smooth transmission performance. The way we design the tooth surface on these gears is a total game-changer for engagement. Unlike straight-tooth conical gears, which can have a more abrupt contact during operation, our zero-angle helical version ensures the engagement process is way more stable. What does that mean for you? Way less impact load on the system, quieter operation, and minimal vibration. For businesses looking to cut down on equipment noise or reduce wear from vibration, this is a huge plus—it keeps your machinery running smoother for longer, and it makes the work environment more comfortable too.​

Next, let’s talk about high load-bearing capacity. This is where the localized control of the tooth contact area comes into play. We’ve optimized how the teeth make contact, so the gear can handle heavier loads without compromising performance. That’s why they’re such a great fit for medium-to-low speed setups that need to carry heavy loads—think industrial mixers, conveyor systems, or heavy-duty pumps. You won’t have to worry about frequent replacements or unexpected downtime because these gears are built to take that pressure.​

Then there’s interchangeability—a big one for businesses that want flexibility. Here’s the thing: zero-angle helical conical gears generate the exact same bearing loads as straight-tooth conical gears. That means you can swap them out in the same support conditions—no need to rework your existing setup, no extra costs for modifying bearings or housings. It’s a seamless switch that saves you time and hassle, whether you’re upgrading equipment or replacing worn parts.​

Last but not least, easy processing. These gears can be produced on the exact same machines we use for ordinary helical conical gears—no need to invest in new equipment. Plus, the processing technique is already pretty mature—our teams know how to manufacture them consistently, with tight tolerances and reliable quality. That translates to shorter lead times, more consistent supply, and no learning curve for production. For businesses that value efficiency and cost control, this is a major advantage.​

All in all, these gears check a lot of boxes: smoother operation, higher load capacity, easy interchangeability, and straightforward manufacturing. They’re a solid choice for a range of industrial applications where reliability and performance matter.

Why choose us?

Since 1994, we've been at the forefront of creating top-quality internal bevel gears and custom gear solutions. With over three decades of experience, we adhere to ISO 4-6 standards, ensuring every product meets the highest quality benchmarks. Our gears are designed for exceptional reliability and durability. We're confident that our premium, custom solutions will exceed your expectations.

Our team includes seasoned experts, such as a doctoral graduate, a respected member of the China Gear Standardization Technical Committee, and a postgraduate researcher specializing in bevel gear technology. Their extensive knowledge fuels our technical innovation and commitment to meeting industry standards.

Our state-of-the-art production facility is equipped with advanced CNC seven-axis, five-linkage spiral bevel gear grinding and milling machines, along with a full range of modern manufacturing and testing equipment. Every step of production is meticulously monitored to ensure our products offer the best quality and efficiency.

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!