HH Series Industrial Hard Surface Teeth Helical Parallel Shaft Gear Unit

Short Description:

HH Series Industrial Hard Surface Teeth Helical Parallel Shaft Gear Unit is high-quality gearbox for heavy-duty industrial applications. All mechanical parts are analyzed with state-of-the-art software to guarantee their reliability. We also offers tailored solutions for specific applications.

Product Detail

Product Tags


1.High modular design
2.High loading support, stable transmitting and low noise level.
3.Excellent sealing, wide range of industry application.
4.High efficiency and save power.
5.Save cost and low maintenance.
6.Housing design to increase thermal conduction areas
7.High efficiency ventilation fans design (optional)
8.Oil lubrication pump or force lubrication system (optional) for efficiency reducing heat to increase gearbox service life.

Main applied for

Chemical agitator
Hoist and transport
Steel and metallurgy
Electric power
Coal mining
Cement and construction
Paper and light industry

Technical data

Housing material Cast iron/Ductile iron
Housing hardness HBS190-240
Gear material 20CrMnTi alloy steel
Surface hardness of gears HRC58°~62 °
Gear core hardness HRC33~40
Input / Output shaft material 42CrMo alloy steel
Input / Output shaft hardness HRC25~30
Machining precision of gears accurate grinding, 6~5 Grade
Lubricating oil GB L-CKC220-460, Shell Omala220-460
Heat treatment tempering, cementiting, quenching, etc.
Efficiency 94%~96% (depends on the transmission stage)
Noise (MAX) 60~68dB
Temp. rise (MAX) 40°C
Temp. rise (Oil)(MAX) 50°C
Vibration ≤20µm
Backlash ≤20Arcmin
Brand of bearings China top brand bearing, HRB/LYC/ZWZ/C&U. Or other brands requested, SKF, FAG, INA, NSK.
Brand of oil seal NAK — Taiwan or other brands requested

How to order




H: Helical

B: Bevel-helical


Output Shaft

S: Solid Shaft

H: Hollow Shaft

D: Hollow Shaft with Shrink Disk

K: Spline Hollow Shaft

F: Flanged Shaft



H: Horizontal

V: Vertical



1, 2, 3, 4


Frame Size

Size 3~26


Nominal ratio

iN: = 12.5~450


Design for assemble

A,B,C,D,… Refer to details catalog.


Direction of rotation of input shaft

Viewing on input shaft:


CCW: Counter clockwise

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