• S flanges are made of high strength cast iron and are bored-to- size for a slip fit on standard shafts.
  • S flanges are easy to install, are readily available from stock in a wide range of popular bore sizes, and are supplied with two set screws at 90°.
  • The S Type coupling consists of two flanges and one sleeve.
Unit of Measure
Items
S-Flex S Type Flanges w/o Keyway - Imperial

S Type Flanges without Keyway - Inch (Imperial) Bores

S-Flex S Type Flanges w/o Keyway - Imperial

S Type Flanges without Keyway - Inch (Imperial) Bores

S-Flex S Type Flanges w/o Keyway - Imperial

S Type Flanges without Keyway - Inch (Imperial) Bores

S-Flex S Type Flanges w/o Keyway - Imperial

S Type Flanges without Keyway - Inch (Imperial) Bores

S-Flex S Type Flanges w/o Keyway - Imperial

S Type Flanges without Keyway - Inch (Imperial) Bores
Description  N/A 5S FLNG 1/2 N/KW N/A 6S FLNG 5/8 N/KW N/A 7S FLNG 5/8 N/KW N/A 8S FLNG 3/4 N/KW N/A 9S FLNG 7/8 N/KW
Bore Size  N/A 1/2 in N/A 5/8 in N/A 5/8 in N/A 3/4 in N/A 7/8 in
Coupling Size N/A 5S N/A 6S N/A 7S N/A 8S N/A 9S
Type N/A Coupling Flange
Material N/A Cast Iron
Thread (Dimension T) N/A 1/4-20 N/A 5/16-18 N/A 3/8-16 N/A 3/8-16 N/A 1/2-13
Keyway Size (W x D) N/A No Keyway
Outside Diameter N/A 3.250 in82.55 mm N/A 4.000 in101.60 mm N/A 4.625 in117.48 mm N/A 5.450 in138.43 mm N/A 6.350 in161.29 mm
Color N/A Gray
Nominal Torque (with EPDM Sleeve) N/A 240 in·lb N/A 450 in·lb N/A 725 in·lb N/A 1135 in·lb N/A 1800 in·lb
Bore Type N/A Finished Bore
Max. Bore (Dimension ID) N/A 1.188 in N/A 1.438 in N/A 1.625 in N/A 1.938 in N/A 2.375 in
Max. Speed N/A 7600.00 rpm N/A 6000 rpm N/A 5250.00 rpm N/A 4500 rpm N/A 3750.00 rpm
Dimension FL N/A 0.590 in14.99 mm N/A 0.780 in19.81 mm N/A 0.780 in19.81 mm N/A 0.880 in22.35 mm N/A 1.030 in26.16 mm
Dimension HD N/A 1.880 in47.75 mm N/A 2.500 in63.50 mm N/A 2.810 in71.37 mm N/A 3.250 in82.55 mm N/A 3.630 in92.20 mm
Dimension L N/A 1.34 in34.04 mm N/A 1.640 in41.66 mm N/A 1.840 in46.74 mm N/A 2.100 in53.34 mm N/A 2.410 in61.21 mm
Dimension P N/A 0.450 in11.43 mm N/A 0.530 in13.46 mm N/A 0.690 in17.53 mm N/A 0.750 in19.05 mm N/A 0.780 in19.81 mm
Dimension SL N/A 0.290 in7.37 mm N/A 0.290 in7.37 mm N/A 0.350 in8.89 mm N/A 0.380 in9.65 mm N/A 0.410 in10.41 mm
Torsional Stiffness N/A 916.00 in·lb/rad N/A 1718.00 in·lb/rad N/A 2769.00 in·lb/rad N/A 4335.00 in·lb/rad N/A 6875.00 in·lb/rad
Rated HP at 100 rpm N/A 0.40 hp N/A 0.70 hp N/A 1.20 hp N/A 1.80 hp N/A 2.90 hp
Rated HP at 1,200 rpm N/A 4.60 hp N/A 8.60 hp N/A 14.00 hp N/A 22.00 hp N/A 34.00 hp
Rated HP at 1,800 rpm N/A 6.90 hp N/A 12.90 hp N/A 21.00 hp N/A 32.00 hp N/A 51.00 hp
Rated HP at 3,600 rpm N/A 13.70 hp N/A 25.70 hp N/A 41.00 hp N/A 65.00 hp N/A 103.00 hp
Coupling Type N/A S-Flex
Weight N/A 1.37 lb N/A 2.59 lb N/A 3.20 lb N/A 5.61 lb N/A 8.46 lb
Cubic inches N/A 14.15375 in³ N/A 26.24000 in³ N/A 39.35875 in³ N/A 62.37525 in³ N/A 97.17723 in³