SAE 11,5
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BoWex 65 FLE-PA flange Ø352,3 H8
Original price was: 190.00€.170.00€Current price is: 170.00€.In stock
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BoWex 80 FLE-PA flange Ø352,3 H8
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BoWex 100 FLE-PA flange Ø352,3 H8
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BoWex 125 FLE-PA flange Ø352,3 H8
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SAE 11.5 / SAE 11 ½ Flywheel Standard – Coupling Fitment Guide
The SAE 11.5 flywheel standard (also written as SAE 11 ½) specifies the outer diameter, bolt circle, and bolt pattern for connecting large diesel engines with couplings, pumps, and power transmission components. It is one of the most common standards used worldwide in marine propulsion, generator sets, and heavy construction machinery.
SAE 11.5 / 11 ½ Dimensions (Catalogue Reference):
- Outer diameter (Ø): 352.3 mm
- Bolt pattern (Z): 8 × Ø10.5
- Bolt circle (DO): Ø333.4 mm
Applications in Couplings:
The SAE 11.5 / 11 ½ flywheel size is widely supported by leading coupling producers. OEM solutions include:
- KTR BoWex® FLE-PA – torsionally stiff curved-tooth flange couplings.
- KTR BoWex® Elastic – flexible couplings for vibration damping.
- CENTAFLEX-K – elastic couplings engineered in close cooperation with engine OEMs.
Why SAE Standards Matter:
By following SAE 11.5 / 11 ½ geometry, couplings can be mounted directly to flywheels from globally recognized engine manufacturers such as Caterpillar, Cummins, Perkins, Volvo Penta, and Deutz. The standardized dimensions prevent installation errors, guarantee proper torque transfer, and ensure long service life of the coupling and drive train.
⚠️ Only original OEM couplings (marked with identifiers like KTR-Kupplungstechnik, BoWex, FLE-PA, >PA6-GF25<, D-4440 Rheine, Centaflex K) guarantee full compliance with SAE 11.5 / SAE 11 ½ standards. Copies may deviate in bolt accuracy or stiffness, causing vibration, premature wear, or costly downtime.