Know your PT6A - Pratt & Whitney Canada
Know your PT6A - Pratt & Whitney Canada
Know your PT6A - Pratt & Whitney Canada
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Bearings<br />
Support of the main shafts in the <strong>PT6A</strong> engine is accomplished by a<br />
combination of ball and roller bearings. Ball bearings support axial and<br />
radial loading, while the roller bearings support only radial loads, allowing<br />
for thermal expansion.<br />
Propeller Shaft Power Turbine Compressor<br />
No. 5: Roller No. 3: Roller No. 1: Ball<br />
No. 6: Ball No. 4: Ball No. 2: Roller<br />
No. 7: Roller**<br />
** Smaller reduction gearboxes do not utilize a No. 7 bearing.<br />
7 6 5<br />
A-60<br />
A-65<br />
A-67<br />
A-52<br />
A-61<br />
A-64<br />
A-66<br />
6 5 4 3 2 1<br />
16
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