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GEARguard 4 Bolt Couplings

“Four” bolt couplings are used on four bolt hole gearbox output flanges. Spigots or pilots can be either make or female. IsoFlex couplings are configured to the most common flanges.

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Imperial Metric

Coupling Model Gearbox Flange Bolt
Circle Diameter
(mm)
Gearbox Flange Bolt
Size
Gearbox Flange Index
Ring Type
Gearbox Flange Index
Ring Diameter
(mm)
Isoflex Coupling
Outside Diameter
(mm)
Isoflex Coupling
Inside Diameter
(mm)
Isoflex Coupling
Thickness
(mm)
Heavy Duty
(Nm)
Medium Duty
(Nm)
Pleasure Craft
(Nm)
Download
IFC-4200-90 78 4 x M10 F 50 125 35 25.0 500 750 850 Data Sheet
IFC-4300-95 82.55 4 x 3/8inch F 63.5 125 35 25.0 500 750 850 Data Sheet
IFC-4400-95 100 4 x M10 F 65 145 50 25.0 500 750 850 Data Sheet
IFC-4500-95 107.95 4 x 7/16inch F 63.5 150 45 28.6 675 1000 1150 Data Sheet
IFC-4500-HT 107.95 4 x 7/16inch F 63.5 150 45 28.6 1180 1770 2000 Data Sheet
IFC-4550-95 107.95 4 x 7/16inch F 63.5 150 45 28.6 435 650 740 Data Sheet
IFC-4550-HT 107.95 4 x 7/16inch F 63.5 150 45 28.6 900 1350 1530 Data Sheet
IFC-4600-95 80 4 x M10 M 60 125 35 25.0 375 560 640 Data Sheet
IFC-4700-95 95.25 4 x 7/16inch rect F 69.85 135 50 32.0 600 900 1000 Data Sheet
IFC-4800-95 79.375 4 x 3/8inch rect F 60.33 125 35 25.0 310 465 525 Data Sheet
IFC-4900-95 120.65 4 x 1/2inch rect F 95.25 175 50 36.5 1200 1800 2000 Data Sheet
IFC-4500-IV-HT 107.95 7/16inch F 63.5 150 54 36 1180 1770 2000
Coupling Model Gearbox Flange Bolt
Circle Diameter
(in)
Gearbox Flange Bolt
Size
Gearbox Flange Index
Ring Type
Gearbox Flange Index
Ring Diameter
(in)
Isoflex Coupling
Outside Diameter
(in)
Isoflex Coupling
Inside Diameter
(in)
Isoflex Coupling
Thickness
(in)
Heavy Duty
(ftlb)
Medium Duty
(ftlb)
Pleasure Craft
(ftlb)
Download
IFC-4200-90 3.07 4 x M10 F 1.97 4.92 1.38 0.98 369 553 626 Data Sheet
IFC-4300-95 3.25 4 x 3/8inch F 2.50 4.92 1.38 0.98 369 553 626 Data Sheet
IFC-4400-95 3.94 10mm F 2.56 5.71 1.97 0.98 369 553 626 Data Sheet
IFC-4500-95 4.25 4 x 7/16inch F 2.50 5.91 1.77 1.13 497 737 848 Data Sheet
IFC-4500-HT 4.25 4 x 7/16inch F 2.50 5.91 1.77 1.13 870 1304 1474 Data Sheet
IFC-4550-95 4.25 4 x 7/16inch F 2.50 5.91 1.77 1.13 321 479 545 Data Sheet
IFC-4550-HT 4.25 4 x 7/16inch F 2.50 5.91 1.77 1.13 663 995 1128 Data Sheet
IFC-4600-95 3.15 4 x M10 M 2.36 4.92 1.38 0.98 276 413 472 Data Sheet
IFC-4700-95 3.75 rect 4 x 7/16inch F 2.75 5.31 1.97 1.26 442 663 737 Data Sheet
IFC-4800-95 3.13 rect 4 x 3/8inch F 2.38 4.92 1.38 0.98 228 343 387 Data Sheet
IFC-4900-95 4.75 rect 4 x 1/2inch F 3.75 6.89 1.97 1.44 884 1327 1474 Data Sheet
IFC-4500-IV-HT 4.25 7/16inch F 2.50 5.91 2.12 1.42 855 1280 1445
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