Siemens has recently made major revisions to those oils manufactured/ marketed by oil companies and approved for its Flender gear units, withdrawing many previously approved oil company brand gear oils and adding others to its approved oils list, as well as showing several oil names being changed.

 

Siemens states "The requirements on the industry gear oils are permanently increased because of the growing power density of the gear units. Therefore the oil manufacturers develop new and better oil formulations in shorter and shorter time-lags. On these grounds the oil approval list for FLENDER gear units must more frequently adapt to the current situation than in the past and one oil approval is only for five years valid. It is always a decision of the oil manufacturer in the end whether he applies for another release of his oil with extensive tests or whether he possibly puts a new request for an approval with a new oil. Only the oil manufacturer can mention to the user the reason for a cut of his oil from the approval list. The oil manufacturer knows the details of it. Siemens can only notice that the oil manufacturer has possibly not put any new requests for an approval after expiry for the approved period."

 

Siemens Flender gear units comprise helical and bevel-helical gear units as well as single-stage and multi-stage planetary gear units.  Application examples include belt conveyor drives, bucket elevator drives, agitator drives, hoisting gear drives, travelling gear drives, paper machine drives, dryer drives and water screw drives.  

 

Siemens, in March 2005, acquired Flender Holding GmbH, Bocholt, Germany, at that time, one of the world's leading suppliers for gear systems. According to Siemens web site, the company claims to be the world's largest supplier of industrial gear units.

 

To view the latest approved oils list, dated August 16, 2013, click here