Specialist in Gear Transmission Solutions，Precision Gear Manufacturing Serving Global Transmission Systems.
Machinable Gear Materials
Carbon Structural Steel：45#、50#
Alloy Structural Steel：
Case-Hardening Steel：
20Cr、20CrMnTi、20Cr2Ni4A、20MnB
Quenched and Tempered Steel：
40Cr、40CrNi、40MnB、35SiMn、42CrMo
Nitriding Steel：38CrMoAl
Cast Steel：ZG45、ZG55
Stainless Steel：
SUS430、SUS420F、SUS303、SUS304
Bearing Steel：SUJ2
Cast Iron：
Gray Cast Iron：HT150、HT200、HT250
Ductile Cast Iron：QT400、QT450、QT500
Non-Ferrous Metals：
Copper Alloys：
Tin Bronze：QSn6.5-0.1、QSn4-3
Aluminum Bronze：QAl9-4、QAl10-3-1.5
Lead Bronze：HPb59-1、HPb62-1
Aluminum Alloys：6061、2A12、7075
Machinable Gear Types
● Worm Series
● Gear Grinding Series
● Gear Hobbing Series
● Spiral Bevel Gear Series
● Gear Shaping Series
● Gear Shaving Series
● Lathe Series
Machinable Gear Standards
Customization
Types of gears
Production equipment
Applicable system
Testing equipmentt
GREFEE can customize various non-standard, special, high-precision spiral bevel gears (Gleason tooth system, Klingelnberg tooth system), hardened surface cylindrical gears (spur gears, helical gears, double helical gears without tool withdrawal groove) and gearboxes according to customer requirements, with no limit on the module.
GREFEE mainly produces precision planetary reducers with gears, motor worm shafts, gear timing pulleys, worm gears, hollow rotating platforms for reduction gearboxes and other industrial transmission products.
Equipment: Maileite CNC gear hobbing machine, imported Fellows gear shaper from the US, Maileite CNC gear shaving machine, gear grinding machine, Guoqiang Daosheng CNC whirling milling machine, Tsugami Swiss – type lathe, 4 – axis CNC machining center, CNC lathe, etc. With a complete set of production processes and quality control systems, it can meet the quality requirements of different customers.
GREFEE has passed the IS0 management system certification to ensure that all its businesses and products meet ISO standards. It has a complete set of gear processing technologies such as gear hobbing, gear shaping, gear shaving, gear grinding, gear milling, CNC lathes, and machining centers. The products are widely used in various fields such as household appliances, intelligent robots, smart homes, automobiles, 5G communications, logistics, and printing equipment.
High – quality products require high – quality production and testing equipment. GREFEE is equipped with a gear meshing tester from Osaka, Japan, GLEASON gear equipment, an Edward gear measurement center, ZEISS CMM, and a Japanese Binjing CNC gear hobbing machine.
Worm Series
Equipment
Guoqiang Daosheng CNC whirling milling machine,Taiwan Centerless Grinder
Processing Range
Module 0.3 – 3.0
Accuracy
Grade 7 (ISO1328)
Gear Grinding Series
Equipment
Maileite Gear Grinding Machine
Processing Range
Module 0.6 – 6.0
Accuracy
Grade 5 (ISO1328)
Gear Hobbing Series
Equipment
Maileite 120E Gear Hobbing Machine
Processing Range
Module 0.3 – 3.0
Accuracy
Grade 7 (ISO1328)
Spiral Bevel Gear Series
Equipment
Maileite Spiral Bevel Gear CNC Gear Hobbing Machine
Processing Range
Module 0.15 – 5.0
Accuracy
Grade 6 (ISO1328)
Gear Shaping&Gear Shaving
Equipment
Maileite Gear Shaving Machine, Gear Shaping Machine
Processing Range
Module below 3.0
Accuracy
Grade 8 (ISO1328)
Lathe Series
Gear Shaping&Gear Shaving
Timing pulleys are widely used in various mechanical systems, such as electric motors, automobile engines, aircraft engines, and oil drilling rigs.
Gearbox Series
Processing Workshop
Processing Display
Copper alloy gear processing
Testing Equipment
Production Process
Production Process
In the aerospace field, we can design and manufacture end – face arc gears, end – face spur gears, and end – face sector gears simultaneously, and have industrialized them. The precision gears manufactured by GREFEE serve major airlines around the world. Our Gleason (FT16000) equipment has a worktable diameter of 1500mm, and can machine workpieces with a maximum diameter of 1600mm, with a module range of 2 – 30mm.
Robot Applications
Robotic Dog:
As one of the main mechanical elements, gears are mainly used as components of reducers inside the robotic arm of bionic robotic dogs. By using a reducer, the rotational speed of the servo motor can be reduced to increase the output torque. Through this design, it is possible for even a small motor to obtain a large torque.
Bionic Hand:
In the design of bionic hands, gears are mainly used to achieve the drive and transmission of joints. Through different types and combinations of gears, the flexible movement and precise control of bionic hands can be realized. Parallel – axis gears are used for the drive of finger joints, intersecting – axis gears are used for the drive of wrist and elbow joints, and skew – axis gears are used to achieve more complex motion control, improving its practicality and flexibility.
Humanoid Robot:
In bionic robots, the gear transmission mechanism can be used to drive the rotation and extension of joints, thus achieving actions such as walking and running. The advantages of the gear transmission mechanism include high transmission efficiency, simple structure, and high reliability. The application of worm gears in robots is mainly concentrated in joints, robot grippers that are easy to open and close, etc
Industrial Robot:
Inside industrial robots, apart from reducers, gears are also indispensable important mechanical elements. For example, in scenarios where speed increase and decrease, torque enhancement, and rotation direction change are required.
UAV:
The rotating wings of UAVs are controlled by motors, and the motors require high – precision and high – quietness gears. Therefore, the gear teeth need to be ground to ensure the smoothness of the gears and meet the requirements of quietness.
Smart Healthcare:
Small – module worm gears (module 0.5 and module 0.8) are more suitable for use in high – tech products, such as medical equipment. The characteristics of the worm – gear pair composed of a worm and a worm gear are to obtain a large reduction ratio in a small space and have a self – locking function (under specific conditions) to prevent reverse rotation.
Application Automobiles
Automobile Transmission:
Ransmission gears often work under high – speed, high – load, and continuously alternating speed and load conditions. The materials are required to have high strength, toughness, and wear resistance. Due to the complex shape of gears and high gear accuracy requirements, the materials are also required to have good processability. Therefore, forged steel is commonly used for transmission gears.
Automobile Dashboard：
The materials for automobile dashboard gears usually include plastics and metal materials. However, under certain high – performance requirements, metal materials such as stainless steel or aluminum alloys are also used. Due to their high strength and corrosion resistance, they are often used to make gears for high – load or high – temperature environments.
Automobile Tailgate：
The telescopic actuator of the automobile tailgate is driven by a motor to reduce the speed through planetary transmission, drive the output spline to rotate, output torque to the screw, and push the tailgate strut to perform lifting motion. Gear transmission can output a large supporting torque in a limited space, which is suitable for the lifting of automobile tailgates.
Central Control Rotating Screen：
The rotation of the central control screen is achieved through the gear of the motor + one – stage worm – gear transmission + parallel transmission, driving the central control screen to rotate horizontally and vertically from 0 – 90%. A buffer structure is added at the stop position to make the screen rotation more stable.
Automobile Door Handle：
In the design of automobile door handles, especially in hidden electric door handles, gears play an important role. The gear transmission components include a first – stage worm, an intermediate gear assembly, and a second – stage helical gear, etc. The gears drive the door handle to perform push – pull movements through the power of the motor to complete the entire action.
Automatic Parking：
Electronic parking is achieved by the motor output shaft transmitting power to the screw – nut assembly in the caliper. The screw – nut assembly converts torque into linear power to push the piston, thereby clamping the brake disc and realizing parking.
Application of Gears in Other Fields
Smart Wearables：
“Light, thin, and fast” has almost become the pronoun of smart consumer products. The Φ3.4mm planetary reduction gearbox, which is “precise, tiny, and ultra – thin”, requires continuous pursuit of technological innovation and breakthroughs in manufacturing processes for gears. GREFEE is willing to assist global customers in promoting the progress of the consumer electronics industry.
Port Equipment：
The advantages of heavy – duty gears mainly include high transmission efficiency, strong load – bearing capacity, good wear resistance, stable transmission, low noise, and high reliability. Heavy – duty gears are widely used in many fields such as construction machinery, mining machinery, and wind power equipment, ensuring efficient power transmission and stable operating performance.
Clean Energy：
In heavy – duty equipment, such as wind power generation equipment, the requirements for gear materials are very high. Such gears must be able to withstand very high torques and axial loads. Therefore, the materials usually need to go through heat treatment processes to increase their wear resistance and fatigue resistance, achieving the goals of safety and stability.
