Large bearings sensed into place

Mounting of large bearings is eased by SKF's new SensorMount system.



The package consists of a sensor integrated with the bearing, and a dedicated hand-held indicator. The bearing is placed on the tapered seating using standard mounting tools, and the hydraulic nut mounted. The SensorMount indicator can then be connected to the bearing flange, while the pump is connected to the hydraulic nut. The clearance reduction can be directly checked on the SensorMount indicator after the pumping has started. When the required clearance reduction has been achieved, the pressure can be released and the hydraulic nut dismounted.

The clearance reduction shown on the indicator is independent of how the bearing is mounted. It makes no difference if the bearings are mounted on shafts or sleeves, or with shafts that are solid or hollow. This contrasts with the traditional approach where expansion of the inner rings is inferred from measurements of axial displacement.

The system allows large spherical roller and CARB bearings on tapered seatings to be mounted quickly and precisely. As the system measures the exact expansion of the inner ring, the interface fit between the bearing and the shaft is accurately achieved. As no complex calculations are required, the need for specially trained personnel is reduced, and the overall mounting process is faster, more reliable and cost effective.

The system is said to be idea for heavy process industries such as pulp and paper, mining and mineral processing. TS

Pointers

* Mounting system measures the exact expansion of the inner ring, instead of inferring it from axial displacement on a tapered shaft seat

* It consist a sensor integrated with the bearing, and a dedicated hand held indicator

* Standard mounting tools are used. System works equally well if bearings are mounted on shafts or sleeves, or with shafts that are solid or hollow

Author
Tom Shelley

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