Kennametal RMB-E and RHM-E expandable reamers eliminate adjustment measurements
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Kennametal's RMB-E monobloc and RHM-E modular expandable reamers operate with a rotation wrench that offers a predictable linear expansion of 2 µ for every 30° turned. This means that no adjustment measurements are required and the tool does not need to be removed from the machine during the expansion process. The simple adjustment process also requires less training, as manual calibration is unnecessary.
The RMB-E monobloc and RHM-E platforms are capable of an expansion range of up to three times IT6 tolerance class. Elastic expansion takes place within the steel body so that the tool is not damaged. The proprietary fail-safe design has a runstop after two complete revolutions to prevent tool damage through over-expansion. This expansion system also allows the user to reverse any expansion in case the tool has been expanded too much or if a smaller expansion is needed.
The RMB-E and RHM-E platforms are both offered with internal through coolant capabilities and are available in two geometries: straight fluted for machining blind holes and helical fluted for through holes.
Kennametal is offering these products in KC6305 grade for multipurpose applications, and in KC6005 grade which is engineered specially for cast iron. Custom solutions will be available for Cermets, PCD, or CBN materials
RHM-E reamers are available in diameters ranging from 14 to 42 mm, while RMB-E diameters range from 14 to 20 mm.
