Roll Ring Traverse Unit Special Bearing，Rolling Ring Traverse Drive，Smooth Shaft Traverse Unit

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The bearings sit on a smooth, unthreaded shaft. Bearing angle determines travel direction and the linear pitch of the drive.In either fixed or variable-pitch Rolling-Ring Linear Drives, the drive unit sits on a smooth, unthreaded shaft. olling-ring bearings are machined with a specially shaped ridge that contacts the shaft at a single point.On Amacoil-Uhing variable-pitch rolling ring drives, the linear-pitch control lever is manually adjusted to a setting on a scale.

Product advantages:

The constant point contact between a rolling-ring bearing and the shaft prevents backlash. Because the ridge of each bearing Is a point of continuous contact with the driveshaft, when the shaft rotates, its rotary motion immediately converts into linear output. There is never free movement or play between shaft and bearing.Because the shaft on which the rolling-ring drive runs has no threads, debris cannot clog the shaft or cause jams. Clogged threads can cause other linear-motion drives to churn, which can subsequently damage expensive system components. In a rolling-ring drive, if an object blocks travel of the drive nut, the shaft simply slips until the blockage is cleared.When a rolling-ring drive reaches the end of the travel stroke, it contacts a hard end-stop which flips a spring-loaded reversal lever connected to the bearing assembly inside the drive unit. When actuated, the reversal lever turns the bearings on the shaft to immediately change the drive’s travel direction. The shaft rotational direction does not change. Reversal is purely mechanical and does not require electronic controls. Depending on the size of the unit, load, and speed, reversal is near instantaneous, typically within a few hundredths of a second.