Ballscrews and guides suit mining and oilfields
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THK UK product story
Edited by the Engineeringtalk editorial team
Aug 23, 2006
The latest range of linear actuators and ballscrews from THK are designed for use in a wide range of mining and oilfield applications.
The latest range of linear actuators and ballscrews from THK are designed for use in a wide range of mining and oilfield applications.
In particular, the latest products have been designed to offer exceptionally high levels of positional accuracy and reliability, combined with heavy load bearing capacities and a long, maintenance-free working life in compact units.
Comprising a range of robust ballscrews, for particularly rugged applications, and heavy duty linear guides, the new generation of products are capable of providing smooth and quiet movement, while being able to transport exceptionally high average dynamic loads with surpassing known levels of accuracy and precision.
In particular, the THK high performance ballscrews, size for size, are capable both of transporting over twice the average dynamic load of competing devices and of producing double the typical maximum nut speed (the DN value).
With load capacities of up to 3390kN and operating speeds of up to 130,000DN, the new ballscrews are especially suitable for applications that demand high-speed, precision movement of larger loads with requirements for long life.
Many of these latest products feature THK's caged ball technology together with a high-speed ball return system that eliminates ball-to-ball contact and ensures that all lubricants are retained; as a result, operation is smooth, silent and virtually maintenance free, minimising frictional losses and helping to cut energy consumption by as much as 33%.
One particularly innovative application is the use of this latest generation of linear motion products in a bore hole testing device.
The system works by lowering a testing pod down a borehole as a ballscrew actuates a securing fin that pushes against the borehole to secure the pod.
The use of the ballscrew ensures exceptionally smooth movement and uses the fact that the ballscrew can backdrive without any sticking, which could potentially cause major problems.
As importantly, the ballscrews can operate effectively at depths of down to 12km and designed to withstand temperatures of up to 200C.
Furthermore, THK's latest models have been constructed using stainless steel, further protecting the rugged units from any potential damage caused by moisture and dirt, in addition to ensuring excellent wear resistance still further.
A range of accessories are available to enhance the performance of the latest linear motion devices, including the QZ lubrication system, that gives significantly extended maintenance intervals with reduced usage of lubricants, and contact scrapers for applications where an additional level of contamination control and protection is required.
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