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The BPK ® Series design provides reliable shaft ground for large AC and DC motors, medium voltage applications, generators, and turbines to divert harmful shaft voltages to ground and extend bearing life.

After as little as three months of running on a VFD without bearing protection, motors can develop fluting damage, as heard here. This is caused by the discharge of shaft voltages through the bearings.

bpk probe® available for

in house and on site testing!

AEGIS® Rings minimize shaft voltages, drastically reducing shaft voltage discharge through motor bearings, thus extending bearing lifetime.

Motor with bpk® carbon brush bearing protection

For additional information on the Helwig Carbon line, please go to https://www.helwigcarbon.com/silver-graphite-brushes/ to view its product line.