The document describes a large slewing ring bearing exported by THB Bearings Co. from China. It is over 6000mm in diameter, weighs over 13 metric tons, and has a tri-row roller structure with an external gear. The rings are forged as a single unitary piece to ensure stable mechanical properties. Quality tests were performed including hardness tests on the raceway and material tests. The bearing was exported to Europe and used on a ship. The document includes photos of the manufacturing process from raw materials to final assembly and packing.

1. THB BEARINGS CO., LIMITED
No. 555, Dongchuan road,
Shanghai, China,
200241
Photo presentation
April 6th, 2010
As the largest and heaviest slewing ring exported
from China , the outer diameter is over 6000mm
and the weight is over 13 metric tons .
The structure is tri-row roller type with external
gear.
In order to have the best and stable mechanical
property , the 3 rings are forged and each ring is
unitary .
In order to guarantee the hardened depth on the
raceway , a test was made before the induction
hardening .
The slewing ring has been exported to Europe ,
being used on a ship , as the bottom of cable
basket .
The cages of the 1st and 2nd row of rollers are
made of aluminium alloy . Nylon cages are also
available .
The cages of the 3rd row of rollers which is
called “spacers” are made of nylon .
During the final assembly and before the
packing, the slewing ring is lubricated by
Lithium grease .
http://www.thb-bearings.com Tel: 86 21 61212664
E-mail: sales@thb-bearings.com Fax: 86 21 61212665
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2. THB BEARINGS CO., LIMITED
No. 555, Dongchuan road,
Shanghai, China,
200241
Raw steel material Forging machine
Heating treatment stove Forged rings after heating treatment
Hardness test to the forged rings Ultrasonic test to the forged rings
Material cut from the rings for tensile test After tensile test
http://www.thb-bearings.com Tel: 86 21 61212664
E-mail: sales@thb-bearings.com Fax: 86 21 61212665
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3. THB BEARINGS CO., LIMITED
No. 555, Dongchuan road,
Shanghai, China,
200241
Material cut from the rings for impact test After impact test
Turning After turning
Gear cutting Gears being cut
Raceway hardened depth test Crack detection after raceway hardening
http://www.thb-bearings.com Tel: 86 21 61212664
E-mail: sales@thb-bearings.com Fax: 86 21 61212665
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4. THB BEARINGS CO., LIMITED
No. 555, Dongchuan road,
Shanghai, China,
200241
Grinding to the raceway Packing
The next photo’s are taken from the new factory area “A” which is finished this
year , the new equipments are arriving constantly , it is planned to be 100% put
into use in 6 months . New factory area “B” is under construction.
Thanks for your patience to read the above information , if you have any question ,
please don’t hesitate to contact us , sincerely hope we can cooperate with you in the
future .
United , we stand !!!
http://www.thb-bearings.com Tel: 86 21 61212664
E-mail: sales@thb-bearings.com Fax: 86 21 61212665
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