Ordinary 3-Speed Bicycle Gear Precision Machining Gear Internal
Gear Hub
What are the characteristics of ordinary three-speed bicyle gears?
An ordinary three-speed bicyle gear, also known as an internal gear
hub, is a type of gearing system commonly found on bicycles. Unlike
external gears, which are visible on the outside of the bicycle,
internal gear hubs house the gears within the rear hub of the
bicycle wheel.
Gear Range: A three-speed gear system typically offers three
different gear ratios that allow the rider to choose between low,
medium, and high gears. These gears provide a range of options to
tackle various terrains, including hills, flat roads, and downhill
stretches.
Internal Gear Hub: The gears in a three-speed system are enclosed
within the rear hub, protecting them from dirt, water, and other
elements. This design makes the gears less prone to damage and
requires less maintenance compared to external gear systems.
Simplicity and Ease of Use: Three-speed gears are known for their
simplicity and user-friendly operation. Shifting between gears is
usually accomplished with a twist grip or a thumb shifter, making
it easy for riders to change gears while riding.
Reliable and Durable: Internal gear hubs are designed to be robust
and durable, ensuring long-lasting performance. With fewer exposed
components, the gears are less susceptible to damage from external
factors, such as impacts or accidental contact.
Why choose us?
1.Internationally, power transmission gear devices are developing
in the direction of miniaturization, high speed, and
standardization. We are experts dedicated to high-quality small
module gears. Our factory was founded in 1994 and has 30 years of
industry experience.
2.Our company currently has one doctorate (member of the China Gear
Standardization Technical Committee) and one graduate student
engaged in bevel gear research. We have a complete set of software
for digital closed-loop manufacturing of spiral bevel gears,
specializing in gear R&D, design, strength verification and
high-precision gear manufacturing.
3.Our company has a complete set of advanced production
equipment and testing equipment such as multiple CNC 7-axis
5-linkage spiral bevel gear grinding and gear milling machines. It
has successively developed high-quality products for users such as
high reduction ratio, high speed, heavy load, low noise, and low
number of teeth, which can meet the high-quality gear needs of
industries such as reducers, industrial robots, industrial sewing
machines, and model aircraft.
| Ordinary 3-Speed Bicycle Gear Precision Machining Gear Internal
Gear Hub |
| Specification |
| Material | 20CrMnTi,42CrMo, 45# etc |
| Shape | Spiral |
| Hardness | Hardened |
| Surface | Bright |
| Pressure Angle | 20°, also can be customized |
| Accuracy Grade | ISO 6-7 Grade |
| Module (M) | ≤4 |
| Heat Treatment | Carburizing, quenching, carbonitriding, high-frequency, quenching,
tempering etc. |
| Processing | Cutting, hobbing, shaping, broaching. |
| Application | Bicycles |
Advanced manufacturing equipment
DH has multiple CNC 7-axis 5-linkage spiral bevel gear grinding
machines and gear milling machines that can process high-reduction
ratio hypoid and transverse cured tooth coupling.
Advanced testing equipment
Utilize a high-precision gear measurement center to complete gear
pitch accuracy detection, tooth profile error detection and inverse
correction of tooth profile errors.
Professional software
Our factory has a complete set of software to realize digital
closed-loop manufacturing of spiral bevel gears, Functions such as
gear design, strength calculation, contact analysis, tool
calculation, tooth profile error reversal, etc. can be realized.
Machining methods include five tools machining(fixed setting) &
G-plete of tapper , spiral format tilt(SFT) method & hypoid
format tilt (HFT) method of Cycloid equidep, etc.
