Extra-Heavy 20CrMnTi Lockstitch Sewing Machine Gear Set for Thick Material

Product Specification

Extra-Heavy 20CrMnTi Lockstitch Sewing Machine Gear Set for Thick Material Stitching

Extra heavy material lockstitch machine gears are heavy-duty precision transmission parts specially developed for industrial lockstitch machines processing thick and extra-thick materials, including spur gears, helical gears, gear shafts, duplex gears and bevel gears. They are widely used on sewing equipment for leather, canvas, tents, luggage, safety belts and heavy fabrics. Manufactured from high-strength wear-resistant alloy steel with multiple heat treatment processes, the gears feature high load capacity, impact resistance, excellent wear resistance and anti-tooth-break performance. They are installed on core components such as main shaft, feeding mechanism, lifting tooth mechanism and reverse stitching mechanism. Able to withstand frequent start-stop and heavy-load sewing conditions, they ensure stable machine operation and uniform stitches, serving as key vulnerable parts for heavy-duty sewing machines.

Product Features

• Reinforced gear body and thickened tooth root, anti-bending and impact resistant to avoid tooth breakage under heavy load.
• Special tooth profile for heavy load with wide meshing surface and uniform stress distribution, greatly improving load capacity.
• High material hardness and superior wear resistance, low abrasion during long-term continuous operation for long service life.
• Good buffering performance to adapt to frequent start-stop and withstand instantaneous impact load.
• Reasonable meshing clearance ensures stable transmission, low noise and small machine vibration.
• Oil and rust resistant, suitable for oily and dusty working environment of sewing workshops.
• Standard precision and strong interchangeability for the same machine model, easy to disassemble and replace.
• High temperature resistance, no annealing or deformation after long-hour continuous operation with stable performance.

Technical Parameter Table

Main Applications

• Main shaft transmission gears and gear shafts for heavy material lockstitch machines.
• Gear sets for feeding mechanism and tooth lifting mechanism.
• Transmission parts for reverse stitching and stitch length adjusting mechanism.
• 90° direction changing bevel gear assemblies for heavy-duty sewing machines.
• Transmission components for sewing equipment of luggage, leather goods and sofa fabrics.
• Parts for machines sewing extra-thick materials such as safety belts, tents, canvas and carpets.
• Replacement gear parts for maintenance of industrial heavy-duty lockstitch machines.
• Complete transmission gears for synchronous feeding heavy material sewing machines.

Product Advantages

• Reinforced gear body and tooth root, impact and fracture resistant for extra-heavy load sewing.
• Heavy-duty wear-resistant material combined with professional heat treatment slows down abrasion and extends replacement cycle.
• Reasonable meshing surface design ensures high transmission efficiency, reduces motor load and saves energy.
• Stable operation and low noise improve the workshop working environment.
• Strong deformation resistance, no distortion or looseness after long-term heavy-load operation.
• Oil, dust and rust resistant with stable performance under harsh working conditions.
• Standard specifications, easy installation and time-saving replacement for maintenance.
• Stable bulk supply and high cost performance effectively reduce equipment operation and maintenance costs.

Production Process

• Incoming raw material inspection, chemical composition and hardness test.
• Steel cutting and hot forging to enhance overall rigidity.
• Pre-heat normalizing to eliminate forging internal stress.
• CNC turning for finish machining of gear blank outer circle, inner hole and end face.
• Process standard heavy-load tooth profile by special gear hobbing equipment.
• Tooth end chamfering and deburring, tooth profile edge trimming.
• Overall quenching and tempering to improve comprehensive mechanical properties.
• Induction hardening on tooth surface to ensure high hardness and wear resistance.
• Precision grinding of inner hole and shaft journal to guarantee coaxiality and fitting accuracy.
• Meshing matching and screening according to tightness.
• Anti-rust and oil-proof surface treatment.
• Full inspection of dimension, hardness and meshing precision, sorting, packaging and warehousing.

Why Choose us?

• 7-axis CNC Grinding: We adopt high-precision 7-axis CNC grinding machines, holding tolerances as tight as ±5μm, ensuring gears run quietly, smoothly and with outstanding durability.
• Strong technical expertise: Our core R&D team includes doctoral and master’s professionals specializing in spiral bevel gear technology, providing strong technical support for complex projects.
• Rigorous testing & high precision: All gears undergo 100% inspection with Gleason metrology systems. We can achieve DIN 6 grade accuracy with strict control over tooth profile and direction errors, keeping our quality at the industry-leading level.
• High transmission efficiency: Our gear designs support a single-stage reduction ratio of up to 300:1, with actual transmission efficiency reaching over 95%, greatly improving energy utilization.
• Excellent durability & cost efficiency: Our gears deliver 40% lower lifecycle cost and a failure rate below 0.5%, ensuring stable long-term operation and reduced maintenance costs.
• Fast response & short lead time: Supported by our digitalized production process, we are able to shorten the delivery cycle to only 20 working days, helping you accelerate project development and launch.
• Professional custom design capability: We provide fully customized gear solutions for applications requiring high-reduction, high-speed, heavy-load, low-noise, and special small-tooth profiles, based on your actual working conditions.