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Description of One Way Bearing Sprag Freewheel Clutch Bearing B205
Feature of Freewheel Clutch Bearing
Type S200 B200 Freewheel Clutch Bearing is a non bearing supported sprag type freewheel. The sprags run
directly on the shaft provided by the user. Bearings are required
to support axial and radial loads. Lubrication and sealing must
also be provided by the installation.
A typical arrangement is to install this type alongside a bearing
as shown on the following page. The housing bore to receive the
outer race will be machined with a H7 tolerance. A key will
transmit the torque. The shaft on which the sprags run must have a
surface hardness of HRc 60 to 62 for a finished depth of 0,6 mm
minimum. Core hardness should be HRc 35 to 45. Surface roughness
must not exceed 22 CLA. Maximum shaft taper 0,01 mm per 50 mm
length.Concentricity between shaft and housing
bore should be maintained within TIR 0,05 mm.
The preferred lubrication is oil. The Stieber design allows the use
of most of the common lubricants used in power transmission
including gear oils with EP additives. When necessary grease
lubrication is also possible.
Dimensions and Capacities of Freewheel Clutch Bearing :
| Model | Torque Capacity (N.m) | Drag Torque (N.m) | Max .Overrunning (r/min) | Max.Idexing (cycle/min) | A(+0 to -0.6) |
B |
Keyway | With JIS Bearing No. | Shaft Dia. C(+0 to -0.025) | Weight (kg) | |
| Shaft | Outer Race | ||||||||||
| B203 | 39.2 | 0.10 | 2400 | 500 | 150 | 25.0 | 40(-0.014-0.039) | 4X2.5 | 6203 | 16.510 | 0.23 |
| B204 | 58.8 | 0.10 | 2400 | 500 | 150 | 25.0 | 47(-0.014-0.039) | 5X3 | 6204 | 18.796 | 0.34 |
| B205 | 98 | 0.20 | 1800 | 400 | 150 | 25.0 | 52(0.017-0.042) | 5X3 | 6205 | 23.622 | 0.45 |
| B206 | 235 | 0.20 | 1800 | 350 | 150 | 28.0 | 62(-0.017-0.042) | 7X4 | 6206 | 32.766 | 0.68 |
| B207 | 372 | 0.20 | 1800 | 300 | 150 | 28.0 | 72(-0.017—0.042) | 7X4 | 6207 | 42.088 | 0.80 |
| B208 | 549 | 0.20 | 1800 | 200 | 150 | 32.0 | 80(-0.017-0.042) | 10X4.5 | 6208 | 46.761 | 0.91 |
| B209 | 549 | 0.20 | 1800 | 200 | 150 | 32.0 | 85(-0.020-0.045) | 10X4.5 | 6209 | 46.761 | 0.95 |
| B210 | 784 | 0.29 | 1200 | 200 | 150 | 32.0 | 90(-0.020-0.045) | 10X4.5 | 6210 | 56.109 | 1.00 |
| B211 | 784 | 0.29 | 1200 | 200 | 150 | 32.0 | 100(-0.020-0.050) | 10X4.5 | 6211 | 56.109 | 1.40 |
| B212 | 1230 | 0.29 | 1200 | 180 | 150 | 42.0 | 110(-0.020-0.050) | 10X4.5 | 6212 | 70.029 | 1.80 |
| B213 | 1230 | 0.29 | 1200 | 180 | 150 | 42.0 | 120(-0.020-0.050) | 10X4.5 | 6213 | 70.029 | 2.30 |
| B214 | 1390 | 0.39 | 180 | 180 | 150 | 42.0 | 125(-0.024-0.060) | 12X4.5 | 6214 | 79.356 | 2.4 |
Installation and Usage of Freewheel Clutch Bearing
1. 200 Series Cam Clutch is shaft mounted, so the shaft on which
the clutch is mounted must be hardened to Rc 56-60 and 1.5 mm case
depth after grinding. Grind to 1.5S (16micro-inch) finish. The
taper of this shaft should not exceed 0.01 mm per 50mm.
2. For installation of the clutch, mount the clutch with bearings
at both sides or on one side in order to obtain concentricity
between the shaft and the clutch outer race and to take up radial
or thrust loads which may work on the outer race or the shaft. See
the installation example.
3. The clutch should be mounted on the shaft by rotating it in the
direction marked by the arrow shown on the clutch plate. Do not
apply shock to the clutch by hammering.
4. The clutches have the same outside diameters as the bearings
shown in the table above. Bore tolerance of the housing in which
the clutch is assembled should be within the range shown in the
table below.
5. For indexing, oil lubrication is recommended.
6. Concentricity of the housing bore and shaft should be within
0.05 mm.
