Internal teeth slewing rings

Internal teeth slewing ring light version

The light version slewing ring, it’s the most common version and used version form the market, for simple applications with medium/low loads; it is amply used for food machinery; packaging and environmental machinery.

Internal teeth slewing ring with one row of balls

Tecma Drive develops and supplies slewing rings with balls of four-point of contact in version of single row balls composed of two rotary rings with induction tempered raceway, into a compact structure and light weight, it will go through steel balls and polyamide or metal spacers on the circular raceway at four points. This version of slewing ring can stand axial and radial forces, and tilting moment at the same time, they are generally predestined in applications such as rotary converyors, welding manipulators, small and medium cranes, excavators and other types of construction machinery.

Internal teeth slewing ring with double row of balls

The slewing rings with double row of balls are monted on two rows of upper and lower steel balls with different diameteres according to the application conditions and the requested loads. This type of open assembly is very convenient, as the arc angles of upper and lower ring raceway are 90°, what can withstand large axial forces and tilting moments; when the radial force its superior than 0.1 times the axial force, it is recommended to specifically design the raceway. Otherwise, the axial and radial loads of the slewing rings series are relatively large and solid in structure, making it especially suitable for medium tower cranes, truck mounted cranes, loading and unloading machinery, etc.

Internal teeth slewing ring version with one row or doble row of crossed rollers

The version of single or double row cross roller slewing ring is composed of two independent rings which are designed in a compact lightweight structure, and require high precision in assembly. The roller is arranged in a 1:1 cross shape, it can withstand axial force, the tiltting moment and large radial forces. It is used for the lifting sector, transport, construction machinery and military products, robotics etc.

Internal teeth slewing ring verison with triple row of corssed rollers

Triple row roller slewing rings have three seat rings which separate the upper, lower and radial raceways and differenced that each row of roller can specify and can support different load simultaneously. The load capacity is the largest compared to the other more standardized models of slewing rings. Due to the large size in axial and radial dimension and solid structure, it is especially suitable for heavy duty machinery such as wheel excavators, wheel cranes, ship cranes, industrial forging, mobile cranes, heavy machinery.