Quick Details

Place of Origin:

Zhejiang, China

Brand Name:


Model Number:


Rated Power:

up to 448KW

Gearing Arrangement:


Output Torque:

up to 52KN

Input Speed:


Output Speed:


Product name:

Trawl winches double envelope worm gearbox


Trawl winches double envelope worm gearbox


blue ,red ,etc


High Strength Cast Iron


Marine, mining etc

Mount Position:

Horizontal Foot Mounted Vertical




1 Year


Wooden Box

Service Sky-pe:


Supply Ability

Supply Ability:
2000 Piece/Pieces per Month Trawl winches double envelope worm gearbox has in stock

Packaging & Delivery

Packaging Details
default packaging: carton / polywood case/ steel pallets”>Trawl winches double envelope worm gearbox :

default packaging: carton / polywood case/ steel pallets
Lead Time
Shipped in 30 days after payment

Online Customization

Product Description

Characteristic of Trawl winches double envelope worm gearbox:

In a Trawl winches double envelope worm gearbox ,three to eleven gear teeth are typically in contact with the worm, depending upon the ratio. The increased number of driven gear teeth that are in contact with the worm significantly increases torque capacity, also raises shock load resistance. In addition to increasing the number of driven gear teeth in contact with the worm, Trawl winches double envelope worm gearbox also increases the contact area on each gear tooth. The actual areas of instantaneous contact between the worm threads and the driven gear tooth are lines. These lines of contact move across the face of the gear tooth as it progresses through its total time of mesh with the worm. The lines of contact in double-enveloping worm gearing are configured to increase the power transmission capability and reduce the stress on each gear tooth.

Working conditions:

Twoshafts for 90 ° Intersect, input speed must not be more than 1500 rpm.The working environment temperatureshould ranges from 0 ~ 40 ° C, when the environment temperature below 0 ° C or above 40 ° C.Before starting the lubricating oil to corresponding heating and cooling, The worm shafts, reverse operation can be positive.


The advantageof Trawl winches double envelope worm gearbox design are dramatic. First, the total load is divided among more individual gear teeth, and the load is further divided where teeth support two lines of contact. This superior load distribution greatly increases load carrying capacity. Second, the improved torque throughput allows a smaller reducer to produce the same amount of torque, resulting in size and weight savings.
Double-enveloping worm gearing can carry loads that would require much larger and heavier cylindrical worm gearing.

Application : Trawl winches double envelope worm gearbox

Packaging & Shipping

Package :

SGR gearbox use standard wood case per gear motor | gear unit .

Shipping :

According to Customer requirment , we delivery products by different transport ,Sea shipping , Air Transportation / Express or Truck transportation etc.

You Appoint , We Service !

Our Services

With all our activities DNV-ISO 9001,SGS -certified, we stand for top-quality service. Entrusting your gearboxes to the care of our Services.

Help protect your gearbox from wear and grinding ,SGRgearbox convert torque reliably and effi­ciently .
We customize our SGR planetary gear units ,double enveloping worm gearbox ,helical gear motor ,modular design helical gear unit ,worm gearbox ,cycloidal gearbox etc to fit your application and meet your needs.

These features enable a reliable and safe service life of over 200 000 operational hours.

Our customers have been placing their trust in SGR gear units since 1997. More than 500 000 gear units of our gearbox are in use reliably around the world, in many cases under very harsh conditions.

Our Honor and Patent :

Company Information


Shanghai SGR Heavy Industry Machinery Co., Ltd.(formerly known as Shanghai Great Wall Reducer Co., Ltd. ) (www.sgrgear.com) has accumulated rich original designing & manufacturing experience after being founded in 1996. SGR brand planetary gear reducer has won hornor of "Science and Technology Advancement Prize" awarded by the National Speed Reducer & Variator Industry Association.

We produce planetary gear units, planar double-enveloping worm gear speed reducers (cone worm gear reducer), helical-bevel gear motors, worm gear reducers, helical-worm gear motors, helical gear motors and many other types of gear units. SGR gear motors and gear units have given satisfactory performance in different industrial applications, including metallurgy, mineral, architecture, shipbuilding, petroleum combination, aviation space-flight, lift routing, textile mechanic, cement, pharmaceuticals, pumps, general mechanic and other domain.

With the advantage of high quality & competitive price, SGR gear motor and gear units are widely welcomed in domestic market and exported to Southeast Asia, Middle Asia, North America and European countries etc.

With excellent testing program, SGR company is always keeping up with the most advanced technology in the world. We have already acquired DNV-ISO9001: 2008 certificate,SGS,CE etc and a patent on SGR branded gearbox.

We have adopted advanced CAD and CIMS in design & manufacture, which help our engineers develop 3 – 5 series of new efficient products each year. All staff in sales & service department are well trained termly, thus you will be always warmly welcomed and understood by our company.

Our products :

Equipment & Quality Assurance :


  • Q: What is your business type ?
  • A: SGR is gearbox manufacturer and Solutions Provider , we are experts of planetary gear reducer ,cone worm gearbox ,modular design helical gear motor , worm gearbox etc.A suitable model will offer to you according to your requirement , besides ,SGR also has proffessional technical team special in custom gearbox and gearbox repair .
  • Q: How long can you provided products guarantee Period ?
  • A: Based on different gearbox types , 12-18 months .
  • Q: What’s Certification your product acquiry ?
  • A: DNV-ISO9001:2008 ,SGS ,CE etc. and new products patent .
  • Q: How many technical employees in your company ?
  • A: We have 10 engineers in our R&D Dep. , included 2 engineers who enjoy government ‘s allowance.
  • Q: Where is your company & how to connect you ?
  • A: Our factory located in No.879 ,JinLiu Rd, JinShan District , Shanghai city ,China .

Contact Information:

Tel:hangzhou ever-power transmission co. ever-power is specialist in pto gearbox. is specialist in pto gearbox02167276714
Fax:hangzhou ever-power transmission co. ever-power is specialist in pto gearbox. is specialist in pto gearbox02167277700

Mobile: hangzhou ever-power transmission co. ever-power is specialist in pto gearbox. is specialist in pto gearbox 18916501065
WhatsApp:hangzhou ever-power transmission co. ever-power is specialist in pto gearbox. is specialist in pto gearbox15365013387

Website: www.sgrgear.com

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