SKF - Linear Motion Standard Range
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3 Ball & roller screws<br />
Roller screws<br />
Planetary roller screws<br />
(fig. 19)<br />
Fig. 19<br />
Threaded rollers accomplish a pure rolling<br />
motion inside the nut.<br />
Features<br />
• Many strong contact surfaces for load<br />
distribution<br />
• Non-recirculating rollers<br />
• No weak point in the nut<br />
Benefits<br />
• Long service life from the high load<br />
carrying capacity<br />
• Robust and shock resistant<br />
• Exceptional reliability<br />
• High speed & acceleration capabili ties<br />
Maximum speed<br />
For screw assembly BRC + FLRBU, the<br />
maximum speed is defined by the product<br />
n ¥ d 0 .<br />
n ¥ d 0 < 160 000 for BRC<br />
(n = rotational speed, in rpm<br />
d 0 = outside diameter of screw shaft, mm)<br />
Typical applications<br />
The capacity to carry heavy loads for<br />
thousands of hours in the most arduous<br />
conditions makes planetary roller<br />
screws suitable for the most demanding<br />
applications. The nut can withstand shock<br />
loads and the timing mechanism is robust<br />
in harsh environments, at high speeds and<br />
at high accelerations. The possible long lead<br />
permits high linear speeds.<br />
Application examples<br />
• Heavy duty machine tool (forming<br />
and stamping presses and broaching<br />
machines)<br />
• Injection moulding and blow moulding<br />
• Factory automation process including spot<br />
welding, clamping, guns, etc...<br />
• Test benches<br />
• Steel industry<br />
• Tyre industry<br />
• Automatic handling<br />
• Civil and military aircrafts, aerospace,<br />
defense, marine<br />
• Nuclear industry<br />
• Transportation industry<br />
• Oil and gas<br />
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