All work
Energy
1.2-tonne gearbox shafts, turned to the micron.
12% longer bearing life
Client
Calder Energy
Material
34CrNiMo6 alloy steel
Process
Heavy turning, cylindrical grinding
Quantity
40 shafts
Tolerance
±0.004 mm on bearing seats
Lead time
10 weeks
01 · The challenge
Calder’s wind gearbox shafts were wearing bearings early. Measurements showed the bearing seats were out of round by more than the drawing allowed.
02 · Our approach
We turned the shafts on our heavy lathe, then ground the bearing seats in a temperature-controlled bay and measured roundness on every shaft.
03 · The result
Field data after two years shows bearing life up 12%. Calder now buys all its replacement shafts from us.
“The roundness reports alone were worth the change of supplier.”
Engineering Director, Calder Energy
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