Changzhou Suma Precision Machinery Co., Ltd
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FK FK-2RS Freewheel One Way Bearings FK6204 FK6204-2RS
Features of freewheel one way bearings
Width
12 / 14 / 15 / 16 / 17 / 18 mm
Operating temperature
max. 140°C
Higher temperatures on request
max. 110°C (design 2RS with RS seals)
Lubrication
Series FK 2RS with seals
Operative lifetime grease lubrication
Series FK without seal discs
Oil or grease lubrication
Delivered with corrosion protection.
Installation
Installation tolerances
Shaft n6; hub N7
Mating parts
Hardening and grinding of the mating parts is not necessary. Thoroughly clean (grease free) the mating parts in the vicinity of the freewheel clutch as well as the freewheel clutch's rings before making the press fit.
Bearing
The freewheel clutch includes ball and roller bearings. Additional external bearing support is not necessary.
Press fit pressure
Press fit pressure must not be applied to the balls.
Clamping direction
The arrow on the inner ring designates the inner ring's clamping direction.
Dimensions and Capacities
Drawing legend:
d = inner diameter D = outer diameter W = width r = edge radius T = torque n = rotation speed C = load capacity
| Designation | d [mm] | D [mm] | W [mm] | Tnom [Nm] | nmax [rpm] | Cdyn. [N] | Cstat. [N] | r [mm] | Weight [kg] | Item no. |
| FK 6203 | 17 | 40 | 12 | 53 | 10,800 | 6,245 | 3,441 | 1.0 | 0.07 | 301065 |
| FK 6203-RS | 17 | 40 | 12 | 53 | 3,700 | 6,245 | 3,441 | 1.0 | 0.07 | 301079 |
| FK 6204 | 20 | 47 | 14 | 60 | 7,500 | 6,869 | 4,268 | 1.5 | 0.12 | 301068 |
| FK 6204-2RS | 20 | 47 | 14 | 60 | 3,200 | 6,869 | 4,268 | 1.5 | 0.12 | 301087 |
| FK 6205 | 25 | 52 | 15 | 104 | 5,400 | 7,448 | 5,146 | 1.5 | 0.15 | 301070 |
| FK 6205-2RS | 25 | 52 | 15 | 104 | 2,800 | 7,448 | 5,146 | 1.5 | 0.15 | 301092 |
| FK 6206 | 30 | 62 | 16 | 148 | 5,100 | 7,859 | 6,066 | 1.5 | 0.23 | 301074 |
| FK 6206-2RS | 30 | 62 | 16 | 148 | 2,400 | 7,859 | 6,066 | 1.5 | 0.23 | 301103 |
| FK 6207 | 35 | 72 | 17 | 265 | 3,700 | 8,902 | 7,819 | 2.7 | 0.34 | 301077 |
| FK 6207-2RS | 35 | 72 | 17 | 265 | 1,900 | 8,902 | 7,819 | 2.7 | 0.34 | 301108 |
| FK 6208 | 40 | 80 | 18 | 267 | 3,700 | 8,902 | 7,752 | 2.7 | 0.45 | 301078 |
| FK 6208-2RS | 40 | 80 | 18 | 267 | 1,900 | 8,902 | 7,752 | 2.7 | 0.45 | 301110 |
| FK 6304-2RS | 20 | 52 | 15 | 104 | 2800 | 7448 | 5146 | 1.5 | 0.17 | 301098 |
All specifications for series FK 2RS (with seals) and series FK (without seals)
The specified nominal torque is based on sufficient stiffness of mating parts .
Rotation speed n for series FK (without seals) = assembly unit's inherent speed
Rotation speed n for series FK 2RS (with seals) = speed difference of mating parts.
The back driving torque is restrained by the torque arm. The torque arm must not be clamped into position. It must have 0.5 inch play in the axial and in the radial direction.
FRHM backstops are supplied for a clearance fit. Set screws on the inner ring are provided for axial retention, shaft collars are not required.
Pictures