From standard spur and helical gears to custom-machined bevel and worm gears — KTD manufactures high-precision gearing solutions engineered for extreme temperatures, heavy loads, and complex industrial environments.
KTD manufactures a complete spectrum of industrial gears designed to transmit power efficiently across parallel, intersecting, and non-intersecting shafts. Whether you require standard metric modules or fully custom tooth profiles, our production capabilities cover every mechanical requirement.
The performance of an industrial gear is fundamentally determined by its material composition and manufacturing precision. KTD adheres to strict international standards (ISO, AGMA, DIN) and utilizes premium-grade alloys to ensure maximum durability under heavy loads and complex operating conditions.
Gear Types
Spur, Helical, Internal, Straight Bevel, Spiral Bevel, Worm, Gear Rack
Precision Standards
ISO (International), AGMA (American), DIN (German)
Carbon & Alloy Steels
S45C (1045 Steel), SCM415, 20CrMnTi (Premium Carburizing Steel)
Alternative Materials
SUS304 Stainless Steel, Cast Iron, MC Nylon, POM (Polyacetal)
Heat Treatments
High-Frequency Induction Hardening, Carburizing (Case Hardening), Nitriding
Finishing Processes
Precision Teeth Grinding, Honing, Black Oxide, Zinc Plating
At KTD, we believe that true quality is achieved through rigorous process control. From raw material selection to final teeth grinding, every manufacturing step is monitored by our quality assurance team to guarantee "zero-defect" products that perform reliably in the most extreme industrial environments.
To achieve the highest ISO and AGMA precision grades, KTD utilizes advanced CNC gear grinding equipment. This final finishing process removes microscopic imperfections left by heat treatment, ensuring perfect involute profiles. The result is a gear that operates with minimal backlash, significantly reduced noise, and exceptional transmission efficiency at high speeds.
For heavy-duty applications, we specify 20CrMnTi — a premium low-carbon alloy steel designed specifically for carburizing. Through precise case-hardening processes, we achieve a gear with an extremely hard, wear-resistant surface (up to HRC 58-62) while maintaining a tough, impact-resistant core. This combination is essential for absorbing shock loads in heavy machinery.
Our commitment to quality is absolute. Every KTD engineer undergoes rigorous training, and our quality control personnel are stationed at every critical production node. Utilizing advanced gear measuring centers and Coordinate Measuring Machines (CMM), we verify pitch, profile, runout, and lead angle to ensure every gear leaving our facility meets exact specifications.
Industrial gears often operate in unforgiving conditions. KTD gears are engineered to maintain structural integrity and transmission efficiency across a wide temperature spectrum — from sub-zero environments to high-heat industrial processes. Through optimized tooth geometry and specialized surface treatments, our gears resist pitting, scoring, and abrasive wear under continuous heavy loads
While standard catalog gears serve many purposes, specialized machinery often requires bespoke solutions. KTD provides comprehensive custom gear manufacturing services, from initial design consultation to rapid prototyping and full-scale production, regardless of batch size.
Our engineering team works closely with your designers to optimize gear specifications for your specific application. We assist in determining the ideal module, pressure angle, helix angle, and material selection to maximize load capacity and operational lifespan while minimizing production costs.
KTD excels in manufacturing non-standard gears that cannot be found in a catalog. Whether you need internal gears for planetary drives, specialized splines, custom keyways, lightening holes, or unique tooth modifications (such as tip relief or crowning), our advanced CNC machining centers can produce complex geometries with absolute precision.
We understand that industrial demands vary. KTD offers highly flexible manufacturing capabilities, accommodating everything from single-piece custom prototypes for R&D testing to high-volume production runs for OEM assembly lines. Our agile production system ensures rapid response times and reliable delivery schedules for every order size.
KTD precision gears are the driving force behind critical machinery in the world's most demanding industries, where failure is not an option and performance must be guaranteed.
Gear failures in industrial applications lead to catastrophic equipment damage and unacceptable downtime. By understanding the root causes of these failures, KTD engineers gears that proactively resist the most common modes of degradation.
Continuous high contact stress between meshing teeth causes microscopic surface fatigue, leading to pitting (small craters) and spalling (flaking) on the gear flanks, which rapidly degrades transmission efficiency and increases vibration.
We combat surface fatigue by utilizing premium alloy steels and precise carburizing heat treatments. This creates a deep, ultra-hard case layer (HRC 58-62) that significantly increases the surface fatigue strength of the gear teeth, preventing pitting even under sustained heavy-duty operation.
If a pulley is even slightly "off-center," it creates fluctuating belt tension during every rotation. This "tugging" effect is the leading cause of premature belt tensile failure and bearing wear.
KTD prevents tooth breakage through meticulous material selection and heat treatment control. By using alloys like 20CrMnTi, we ensure the gear core remains tough and ductile after surface hardening. This resilient core absorbs and dissipates shock energy, preventing brittle fractures at the tooth root.
Minor inaccuracies in tooth profile, pitch, or concentricity cause uneven meshing and transmission error. At high rotational speeds, these microscopic errors amplify into severe noise, destructive vibration, and accelerated wear.
KTD eliminates high-speed vibration through advanced CNC teeth grinding and dynamic balancing. By finishing the gear teeth to the highest ISO/AGMA precision grades, we ensure a perfect involute profile and smooth, continuous contact ratio, resulting in whisper-quiet operation and extended bearing life.
Review our frequently asked questions to learn more about gear selection, materials, and KTD's manufacturing capabilities. For specific technical inquiries, please consult our engineering team.
Spur gears have straight teeth parallel to the shaft and are excellent for general-purpose, moderate-speed applications where axial thrust must be avoided. Helical gears have angled teeth that engage gradually, providing a higher contact ratio. This makes helical gears significantly smoother, quieter, and capable of carrying heavier loads at higher speeds compared to spur gears of the same size. However, helical gears generate axial thrust forces, requiring the use of thrust bearings in the system design.
20CrMnTi is a premium low-carbon alloy steel specifically formulated for carburizing (case hardening). When subjected to this heat treatment, the gear develops an extremely hard, wear-resistant outer surface (ideal for resisting friction and pitting) while maintaining a tough, ductile core. This combination of surface hardness and core toughness is critical for industrial gears that must endure both continuous heavy wear and sudden shock loads without fracturing.
Yes, reverse engineering and custom replacement is a core KTD capability. If you have a worn or broken gear from an existing machine, you can provide us with the technical drawings, or send the physical part to our facility. Our engineers will measure the gear, determine the exact module, pressure angle, and material specifications, and manufacture a high-precision replacement that meets or exceeds the original component's performance.
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