Flexible Couplings


Coupling System Drawing When a brake or clutch is foot mounted, and connected to a fully supported shaft, a flexible coupling must be used.

Since perfect shaft alignment is impossible, flexible couplings are needed to protect the bearings from destructive side loads.

Coupling photo Oldham style - 3 piece design . . . 2 hubs and 1 black disk. Disk groove slides along hub's tenon, to allow for misalignment.

Beam style - 1 piece design . . . Spiral slit flexes to allow for misalignment.

Coupling drawing

Flexible Couplings
FOR BRAKE
OR CLUTCH
MODEL
CUSTOMER SHAFT FLEXIBLE COUPLING DIMENSIONS
Diameter Type Part Number Diameter Length Shaft Gap Type
min. max.
B5Z 3/16 clamp J16-3-2 0.63 0.80 0.02 0.40 Beam
B1, C2 J19-3-3 0.75 0.90
B2 1/4 J22-4-4 0.88 1.06 0.46
C5 5/16 J25-5-5 1.00 1.25 0.65
B6 3/8 J28-6-6 1.13 1.50 0.91
B15, C15 3/8 2 flats at
90 degrees
J33-F37-F37 1.31 1.89 0.71 0.78 Oldham
B35, C35 1/2 J41-F50-F50 1.63 2.00 0.60 0.66
B60 3/4 3/16 keyway J50-C75-K75 1.97 2.35 0.72 0.79
2 flats at
90 degrees
J50-C75-F75
C70 3/4 3/16 keyway J50-K75-K75 1.97 2.35 0.72 0.79
2 flats at
90 degrees
J50-K75-F75
B115, B150
B220,C130
3/4 3/16 keyway J57-K75-K75 2.25 3.07 0.83 0.91
7/8 J57-K75-K87
KB & POB (large brakes) &
KC & POC (large clutches)
View large series of couplings.
All dimensions are in inches.
Maximum shaft penetration for beam-type couplings = centerline of coupling.
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