helical speed reducer

R77 helical gearbox

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The innovative series R77 coaxial gearbox is the culmination of many years expertise. Designed to be utilised in a wide variety of situations it combines high load carrying capacity with high efficiency and reliability and is manufactured using the highest quality materials and compounds.


1. Structure : flange-mounted, foot-mounted (can oil), flange-mounted single stage gear, foot-mounted single stage gear, flange-mounted with leangthen bearing box

2. Small off-center output and compact structure

3.  Maximum utilization of housing space

4.  Integral casting housing with good rigidity to enhance the shaft strength and service life of bearing

5.  Big or small flange type installation and output through solid shaft

6. Good available capability & reliability

7.  Good temperature exchange capability & high strengthens

8. carburized and grinded teeth

9. Input types: Couple-type motor, input through shaft and input through coupling flange

10. modular designed and composed with other drive units to satisfy all kinds of plan of transmission

helical speed reducer

R77 series helical speed reducer Ratios from 5:1 to11,000:1, up to 11,00Nm

Highly efficient gearing, saving energy and running costs

Dimensionally interchangeable with other manufacturers

Innovative motor adaptor uses standard IEC interface

Oil tight gearhead enables motor removal without spillage

ATEX certification available


Foot or flange mounting


Place Of Origin:   Changzhou

Type: R Series

HS Code: 84834090

Quality: Well and high quality control.

MOQ: Offer sample testing for distributor; more quantity, better price.

Packaging Detail: Wodden case, Customized Packing is acceptable.

Inspected: All of our products are gel-coated and highly inspected before shipping.

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Payment Terms:

T/T accept: FOB generally 30% deposit ,the balance need to accepted before shipment ;

CIF: The balance can be paid when you see copy of the Bill of Lading;

Others L/C,W/U,D/P, Paypal acceptable.

Delivery Time: 7~10days for samples, 25~30days for order after we get the deposit

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Coaxial gearbox General Technical data
Housing material HT250 high-strength cast 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

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