The W series is the most compact shaft-coupling construction in the TAS Schäfer overview. It connects two precisely aligned shaft ends through a sleeve and external pressure-ring arrangement. Standard W shaft diameters are described as 10–270 mm, with special diameters such as inch sizes available by arrangement. This article lists the printed W011–W260 catalog entries and distinguishes shaft diameter from nominal type.
Series configuration
| Item | Series-specific information |
|---|---|
| Series / catalog types | W; W011, W015, W020, W025, W030, W035, W040, W050, W060, W070, W080, W090, W100, W110, W120, W130, W140, W150, W160, W180, W200, W220, W240, W260 |
| Shaft-diameter range | 10–270 mm in the printed catalog table |
| Torque-only catalog range | 30–465,000 Nm in the printed catalog table |
| Connection | Rigid, backlash-free frictional shaft connection |
| Shaft spacing | Confirm the sleeve and shaft insertion on the product drawing |
| Catalog ordering example | TAS W070/065/070 |
Clamping principle and load path
The rigid connection uses external pressure rings or shrink discs to press a connecting sleeve onto the shaft ends. The sleeve carries the transmitted load between the shafts. The external clamping components generate radial pressure and supply the clamping force; they are outside the torque load path. The coupling is installed by sliding it onto the shaft ends and tightening the external clamping systems according to the product instructions.
Construction and installation envelope
The W catalog illustration identifies a sleeve, pressure ring G, pressure ring DG and the clamping screws. Its compact sleeve and pressure-ring geometry suit installations where the shaft ends can be brought together within the required insertion and positioning arrangement. Check the sleeve length L, coupling width H, outer diameter D and screw access together when comparing sizes.
Complete printed catalog data
Options separated by slashes are paired in the same left-to-right order across d_w, M_max, F_ax and p_w. Dimensions, screw details and weight belong to the nominal type in that row. M_max applies at F_ax = 0, and F_ax applies at M_t = 0. Decimal commas are written as decimal points. Entries are reproduced from the printed catalog; any specific verification notes below remain part of the selection information.
| Type | d_w options (mm) | M_max, matching order (Nm) | F_ax at M_t=0, matching order (kN) | D (mm) | L (mm) | H (mm) | A (mm) | M_A (Nm) | Z (catalog) | Screw S | DIN | Class | p_w, matching order (N/mm²) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| W011 | 10 / 11 / 12 | 30 / 36 / 60 | 6 / 7 / 10 | 47 | 25 | 27 | 30 | 6 | 6 | M5 x 20 | 933 | 10.9 | 150 / 189 / 222 | 0.4 |
| W015 | 13 / 15 / 17 | 70 / 150 / 180 | 11 / 20 / 21 | 55 | 30 | 33 | 37 | 6 | 7 | M5 x 25 | 933 | 10.9 | 83 / 126 / 160 | 0.5 |
| W020 | 18 / 20 / 22 | 200 / 270 / 350 | 22 / 27 / 31 | 60 | 34 | 37 | 42 | 12 | 8 | M6 x 30 | 931 | 10.9 | 213 / 241 / 266 | 0.7 |
| W025 | 23 / 25 / 27 | 370 / 470 / 600 | 32 / 37 / 44 | 66 | 38 | 41 | 48 | 12 | 8 | M6 x 30 | 931 | 10.9 | 178 / 197 / 214 | 0.8 |
| W030 | 28 / 30 / 32 | 540 / 670 / 750 | 38 / 44 / 46 | 76 | 42 | 45 | 54 | 12 | 10 | M6 x 35 | 931 | 10.9 | 215 / 217 / 231 | 1.3 |
| W035 | 33 / 35 / 37 | 750 / 900 / 1050 | 45 / 51 / 56 | 80 | 46 | 49 | 62 | 12 | 12 | M6 x 35 | 931 | 10.9 | 168 / 180 / 190 | 1.5 |
| W040 | 38 / 40 / 43 | 1250 / 1550 / 1850 | 65 / 77 / 86 | 98 | 50 | 54 | 71 | 30 | 8 | M8 x 40 | 931 | 10.9 | 175 / 184 / 196 | 2.5 |
| W050 | 44 / 50 / 54 | 2200 / 3300 / 3800 | 100 / 132 / 140 | 115 | 60 | 64 | 86 | 59 | 8 | M10 x 45 | 931 | 10.9 | 189 / 200 / 212 | 4 |
| W060 | 55 / 60 / 64 | 4050 / 5100 / 6100 | 147 / 170 / 190 | 125 | 70 | 74 | 98 | 59 | 10 | M10 x 50 | 931 | 10.9 | 177 / 190 / 198 | 5.3 |
| W070 | 65 / 70 / 74 | 6500 / 8200 / 9000 | 200 / 234 / 243 | 148 | 80 | 85 | 112 | 59 | 12 | M10 x 60 | 931 | 10.9 | 172 / 181 / 188 | 8.4 |
| W080 | 75 / 80 / 84 | 10500 / 12300 / 14000 | 280 / 307 / 333 | 170 | 94 | 99 | 130 | 100 | 12 | M12 x 70 | 931 | 10.9 | 73 / 186 / 192 | 13.1 |
| W090 | 85 / 90 / 94 | 14200 / 16400 / 18000 | 334 / 364 / 383 | 185 | 104 | 109 | 145 | 250 | 7 | M16 x 80 | 931 | 10.9 | 166 / 173 / 177 | 17 |
| W100 | 80 / 100 / 104 | 19100 / 23100 / 26000 | 402 / 462 / 500 | 200 | 114 | 119 | 158 | 250 | 9 | M16 x 90 | 931 | 10.9 | 200 / 189 / 193 | 21 |
| W110 | 105 / 110 / 114 | 28500 / 32000 / 35000 | 542 / 581 / 614 | 217 | 124 | 129 | 170 | 250 | 12 | M16 x 90 | 931 | 10.9 | 214 / 218 / 221 | 27 |
| W120 | 115 / 120 / 124 | 38500 / 43500 / 46000 | 669 / 725 / 742 | 235 | 134 | 139 | 184 | 250 | 13 | M16 x 90 | 931 | 10.9 | 199 / 200 / 204 | 33 |
| W130 | 125 / 130 / 134 | 47500 / 55000 / 58000 | 760 / 846 / 865 | 267 | 150 | 155 | 206 | 490 | 10 | M20 x 110 | 931 | 10.9 | 195 / 198 / 200 | 45 |
| W140 | 135 / 140 / 144 | 62000 / 67000 / 71000 | 918 / 957 / 986 | 280 | 160 | 165 | 218 | 490 | 11 | M20 x 110 | 931 | 10.9 | 192 / 195 / 197 | 55 |
| W150 | 145 / 150 / 154 | 73000 / 78000 / 82000 | 1006 / 1040 / 1065 | 302 | 170 | 175 | 230 | 490 | 12 | M20 x 120 | 931 | 10.9 | 186 / 188 / 190 | 70 |
| W160 | 115 / 120 / 125 | 82000 / 88000 / 97000 | 1058 / 1100 / 1175 | 315 | 180 | 185 | 242 | 490 | 13 | M20 x 120 | 931 | 10.9 | 178 / 182 / 184 | 80 |
| W180 | 166 / 180 / 185 | 108000 / 132000 / 140000 | 1301 / 1465 / 1513 | 345 | 200 | 205 | 265 | 490 | 16 | M20 x 130 | 931 | 10.9 | 179 / 181 / 183 | 105 |
| W200 | 186 / 200 / 210 | 153000 / 184000 / 204000 | 1645 / 1840 / 1943 | 375 | 225 | 230 | 295 | 490 | 20 | M20 x 150 | 931 | 10.9 | 174 / 178 / 182 | 135 |
| W220 | 211 / 220 / 230 | 214000 / 240000 / 260000 | 2028 / 2180 / 2260 | 410 | 253 | 258 | 320 | 840 | 18 | M24 x 160 | 931 | 10.9 | 191 / 193 / 196 | 180 |
| W240 | 231 / 240 / 250 | 280000 / 305000 / 334000 | 2424 / 2540 / 2672 | 435 | 273 | 278 | 350 | 840 | 20 | M24 x 180 | 931 | 10.9 | 182 / 184 / 185 | 210 |
| W260 | 251 / 260 / 270 | 390000 / 425000 / 465000 | 3108 / 3270 / 3444 | 515 | 300 | 305 | 380 | 1250 | 20 | M27 x 200 | 931 | 10.9 | 204 / 206 / 208 | 345 |
Series-specific data notes
Catalog verification notes: the printed W100 first shaft-diameter entry is 80 mm, while the analogous WLA100 and WLB100 entries begin at 95 mm. The printed W160 shaft diameters are 115, 120 and 125 mm, whereas the WLA160 and WLB160 entries list 155, 160 and 165 mm. The W values below are retained as printed and must be confirmed against the individual product drawing before engineering selection. No substituted shaft diameters have been inferred.
Configuration details
The W table includes nominal types whose available shaft alternatives do not simply reproduce the nominal type number. The separate shaft-diameter column is therefore essential. For a nonstandard bore or unequal shaft ends, obtain the final geometry and connection rating rather than assuming that a nearby nominal row can be used without adjustment.
Technical symbols and rating conditions
| Symbol | Meaning / rating condition |
|---|---|
| d_w | Shaft diameter |
| M_max | Maximum transmittable torque with F_ax = 0 |
| F_ax | Maximum transmittable axial force with M_t = 0 |
| D | Outer diameter of the coupling |
| L | Connecting-sleeve length |
| H | Coupling width where given; catalog dimensions are for the unlocked condition |
| A | Screw pitch-circle diameter |
| M_A | Required clamping-screw tightening torque |
| Z / S | Screw quantity as listed / screw size |
| p_w | Average contact pressure on the shaft |
Rigid connection and shaft alignment
These are rigid couplings and cannot compensate shaft misalignment. Align the shafts accurately before assembly. The drive or gearbox arrangement needs suitable elastic support elsewhere in the drivetrain to accommodate shocks, deformation and vibration. A longer connecting sleeve provides a different shaft-spacing arrangement; it does not turn the coupling into a flexible or misalignment-compensating element.
Combined loads and shaft stiffness
M_max is stated for torque transmission with zero axial force. F_ax is stated for axial loading with zero torque. The two maxima cannot be applied simultaneously as independent allowances. Where torque, axial load and bending occur together, assess their combined effect and check each operating case. Rotating bending is a dynamic load case; a static torque-only review does not cover it.
A hollow shaft has lower radial stiffness than a comparable solid shaft, which can change contact pressure, deformation and transmittable torque. Include any shaft bore and material properties in the calculation. The catalog also addresses stress concentrations and contact conditions, so a diameter-and-torque match alone is not the complete design check.
Recommended fits and surface roughness
These are the diameter intervals and recommendations given in the basic-design table. They do not extend the available sizes of this series. If a needed diameter interval or tolerance is not stated, confirm the application-specific requirement rather than extrapolating the table.
| Shaft diameter > (mm) | Shaft diameter ≤ (mm) | F_S,max (mm) | Hub / shaft fit | Rz (µm) |
|---|---|---|---|---|
| 30 | 50 | 0.032 | H6/h6 | 10 |
| 50 | 80 | 0.049 | H7/h6 | 10 |
| 80 | 120 | 0.057 | H7/h6 | 16 |
| 120 | 150 | 0.065 | H7/h6 | 16 |
| 150 | 180 | 0.079 | H7/g6 | 16 |
| 180 | 250 | 0.090 | H7/g6 | 16 |
| 250 | 315 | 0.101 | H7/g6 | 16 |
| 315 | 400 | 0.111 | H7/g6 | 16 |
| 400 | 500 | 0.123 | H7/g6 | 25 |
| 500 | 630 | 0.136 | H7/g6 | 25 |
Assembly surfaces and positioning
The contact surfaces at the shaft ends must be clean, dry and free of grease. The functional surfaces of the external clamping system, the screw threads and the under-head bearing surfaces have their specified lubrication requirements. The coupling is supplied ready for installation, but the shaft surfaces and the final assembly still need to satisfy the selected product procedure. Keep the shaft friction surfaces separate from the lubricated screw and clamping surfaces.
The cylindrical clearance arrangement permits positioning of the sleeve on the shaft ends. The catalog describes no subsequent axial shift during clamping. Confirm adequate insertion beneath the pressure rings or shrink discs and locate the shaft contact regions as required by the product drawing. Follow the documented tightening and release sequence for the selected external clamping system.
Applications and special versions
Typical application areas include marine drives, materials handling, mixing and process machinery and industrial drive systems requiring a rigid shaft-end connection. Longer sleeve arrangements can be adapted to shaft spacing, while special dimensions, corrosion protection and surface finishes can be specified by arrangement. An adapted version requires its own drawing and load check.
Ordering information
Specify the complete series and nominal type, both shaft-end dimensions and tolerances, shaft materials, actual shaft-end spacing, torque, speed, axial and bending loads and the load spectrum. Include assembly and removal access, required surface finish, corrosion protection and any special dimensions. Confirm the item-specific drawing and installation instructions, especially for adapted bores or sleeves, before using a catalog value as the final equipment specification.