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HercuFlex® offers increased nominal torque, larger maximum bore size and longer service life over traditional gear couplings. Despite the advanced nature of these improvements, the HercuFlex Gear Coupling still utilizes the standard AGMA flange interface to ensure field interchangeability. In addition to unequaled bore and torque capacity while maintaining compliance with standard AGMA flange interfaces, key features include 1.5° of misalignment per gear mesh, stronger alloy steel hubs and sleeves (on the FX, CX, and FXL), improved fastener corrosion resistance, and advanced seal design for increased contamination resistance. Furthermore, the hubs and seals used for both the flange and continuous sleeves HercuFlex gear coupling designs are common and interchangeable parts.
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Bore Size  (in)

Keyway Size  (in)

Part Number

Description 

Bore Size 

Keyway Size 

Nominal Torque

Max Speed (Unbalanced)

Length thru Bore

Dimension HD

CAD

697904364491 N/A FCXMM 1.5 HUB SOLID N/A 0 in N/A N/A 26,100 in·lb N/A 5,500 rpm N/A 4.5 in N/A 3.29 in N/A
697904334098 N/A FCXMM 2 HUB 27MM P7 8X3.3MMKW N/A N/A 8X3.3MM in N/A 44,850 in·lb N/A 5,000 rpm N/A 5.5 in N/A 4.21 in N/A
697904364507 N/A FCXMM 2 HUB SOLID N/A 0 in N/A N/A 44,850 in·lb N/A 5,000 rpm N/A 5.5 in N/A 4.21 in N/A
697904364514 N/A FCXMM 2.5 HUB RSB N/A N/A N/A 79,700 in·lb N/A 4,400 rpm N/A 6.5 in N/A 4.97 in N/A
697904364521 N/A FCXMM 3 HUB RSB N/A N/A N/A 135,700 in·lb N/A 4,000 rpm N/A 7 in N/A 5.88 in N/A
697904364538 N/A FCXMM 3.5 HUB RSB N/A N/A N/A 203,550 in·lb N/A 3,500 rpm N/A 7.5 in N/A 6.87 in N/A
697904364545 N/A FCXMM 4 HUB RSB N/A N/A N/A 311,540 in·lb N/A 3000 rpm N/A 8.25 in N/A 8.10 in N/A
697904364552 N/A FCXMM 4.5 HUB RSB N/A N/A N/A 427,460 in·lb N/A 2,700 rpm N/A 9 in N/A 9.09 in N/A
697904364569 N/A FCXMM 5 HUB RSB N/A N/A N/A 584,890 in·lb N/A 2,500 rpm N/A 9.5 in N/A 10.24 in N/A
697904364576 N/A FCXMM 5.5 HUB RSB N/A N/A N/A 771,300 in·lb N/A 2,200 rpm N/A 10.5 in N/A 11.28 in N/A
697904364583 N/A FCXMM 6 HUB RSB N/A N/A N/A 1,207,500 in·lb N/A 3,150 rpm N/A 11.25 in N/A 12.29 in N/A
697904364590 N/A FCXMM 7 HUB RSB N/A N/A N/A 1,638,750 in·lb N/A 2000 rpm N/A 13.19 in N/A 14.30 in N/A
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