The Rowland Company - WCS Disc Brake Elements

Products Catalog

WCS elements are disc type, externally cooled, spring applied units. They are designed to absorb and dissipate the thermal loads associated with the most severe braking and tensioning applications. The WCS friction couple was developed specifically for continuous slip service and has a dynamic coefficient of friction which is larger than its static coefficient of friction. Special high coefficient linings are also available which provide 50% higher torque than standard friction linings and provide a 1:1 dynamic to static torque ratio.

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Unit of Measure

Items	146244 WCS Disc Brake Elements	146245 WCS Disc Brake Elements	146376 WCS Disc Brake Elements	146229 WCS Disc Brake Elements	146230 WCS Disc Brake Elements
Size	N/A 108WCS	N/A 208WCS	N/A 308WCS	N/A 114WCS	N/A 214WCS
Dimension D₂₄	N/A 0.81 in21 mm	N/A 0.81 in21 mm	N/A 0.81 in21 mm	N/A 0.91 in23 mm	N/A 0.91 in23 mm
Dimension D₂₅	N/A 1.25 in32 mm	N/A 1.25 in32 mm	N/A 1.25 in32 mm	N/A 1.41 in36 mm	N/A 1.41 in36 mm
Dimension D₂₉	N/A 0.250 in6.4 mm
Dimension D₄₆	N/A
Dimension D₄₃	N/A 2.56 in65 mm	N/A 2.56 in65 mm	N/A 2.56 in65 mm	N/A 2.81 in71 mm	N/A 2.81 in71 mm
Dimension G¹	N/A 12.125 in308.0 mm	N/A 12.125 in308.0 mm	N/A 12.125 in308.0 mm	N/A 18.750 in476.3 mm	N/A 18.750 in476.3 mm
Dimension H₁₀	N/A 4.12 in105 mm	N/A 4.12 in105 mm	N/A 4.12 in105 mm	N/A 7.12 in181 mm	N/A 7.12 in181 mm
Dimension H₁₃	N/A 8.375 in212.7 mm	N/A 8.375 in212.7 mm	N/A 8.375 in212.7 mm	N/A 14.375 in365.1 mm	N/A 14.375 in365.1 mm
Dimension J₁	N/A 3.12 in79 mm	N/A 3.12 in79 mm	N/A 3.12 in79 mm	N/A 6.00 in152 mm	N/A 6.00 in152 mm
Dimension J₂	N/A 12.24 in311 mm	N/A 12.24 in311 mm	N/A 12.24 in311 mm	N/A 18.94 in481 mm	N/A 18.94 in481 mm
Number H₄	N/A 3
Size H₄²	N/A 1/4-20NC-2	N/A 1/4-20NC-2	N/A 1/4-20NC-2	N/A 3/8-16NC-2	N/A 3/8-16NC-2
Bolt Circle H₄	N/A 3.500 in88.9 mm	N/A 3.500 in88.9 mm	N/A 3.500 in88.9 mm	N/A 6.500 in165.1 mm	N/A 6.500 in165.1 mm
Inlet Port Thread Size O₂³	N/A 3/8-18	N/A 3/8-18	N/A 3/8-18	N/A 1/2-14	N/A 1/2-14
Inlet Bolt Circle Diameter	N/A 6.63 in168 mm	N/A 6.63 in168 mm	N/A 6.63 in168 mm	N/A 11.50 in292 mm	N/A 11.50 in292 mm
Minimum Bore Range⁴	N/A 1.38 in35 mm	N/A 1.63 in41 mm	N/A 1.88 in48 mm	N/A 2.13 in54 mm	N/A 2.63 in67 mm
Maximum Bore Range⁵	N/A 2.50 in64 mm	N/A 2.50 in64 mm	N/A 2.31 in59 mm	N/A 4.38 in111 mm	N/A 4.49 in114 mm
Dimension D₁	N/A 1.75 in44 mm	N/A 4.00 in102 mm	N/A 7.75 in197 mm	N/A 2.88 in73 mm	N/A 4.38 in111 mm
Dimension D	N/A 7.18 in182 mm	N/A 9.78 in248 mm	N/A 12.34 in313 mm	N/A 8.51 in216 mm	N/A 11.41 in290 mm
Dimension D₂	N/A 6.68 in170 mm	N/A 9.25 in235 mm	N/A 11.81 in300 mm	N/A 7.72 in272 mm	N/A 10.70 in267 mm
Number of Coolant Ports (O)⁶	N/A 4	N/A 6	N/A 8	N/A 4	N/A 6
Coolant Port Thread Size	N/A 3/8-18 NPT	N/A 3/8-18 NPT	N/A 3/8-18 NPT	N/A 1/2-14 NPT	N/A 1/2-14 NPT
Gear Part Number	N/A 415313	N/A 415314	N/A 416457	N/A 415454	N/A 415302
Torque Rating	N/A 5600 lb·in632 Nm	N/A 10000 lb·in1129 Nm	N/A 13950 lb·in1576 Nm	N/A 20000 lb·in2258 Nm	N/A 37500 lb·in4234 Nm
Release Pressure	N/A 80 psi5.5 bar
Thermal Rating⁷	N/A 30 hp22.4 kW	N/A 60 hp44.7 kW	N/A 90 hp67 kW	N/A 60 hp44.7 kW	N/A 120 hp89.5 kW
Water Flow Rate⁸	N/A 3 gpm11.4 dm³/min	N/A 6 gpm22.7 dm³/min	N/A 9 gpm34.1 dm³/min	N/A 6 gpm22.7 dm³/min	N/A 12 gpm45.4 dm³/min
C Pressure Drop Coefficient	N/A 3.2E-04 6.7E-02	N/A 1.7E-02 8.2E-05	N/A 3.5E-03 7.4E-03	N/A 1.2E-04 2.4E-02	N/A 2.9E-05 6.0E-03
Housing (Inertia)	N/A 9 lb·ft²0.38 kg·m²	N/A 12 lb·ft²0.51 kg·m²	N/A 15 lb·ft²0.64 kg·m²	N/A 64 lb·ft²2.7 kg·m²	N/A 83 lb·ft²3.5 kg·m²
Disc & Gear (Weight)	N/A 1689 766	N/A 1247 566	N/A 365 805	N/A 165 363	N/A 374 625
Disc & Gear (Inertia)	N/A 10.03 203 238 8	N/A 109 13.65 324 4.3	N/A 1.5 14 3.4 86	N/A 124 2.53 273 60	N/A 2.33 59
Maximum Slip Speed⁹	N/A 2150 rpm	N/A 2150 rpm	N/A 2150 rpm	N/A 1260 rpm	N/A 1260 rpm
Maximum Freewheeling Speed¹⁰	N/A 3400	N/A 3400	N/A 3400	N/A 2100	N/A 2100
Housing (Weight)	N/A 90 lb41 kg	N/A 116 lb53 kg	N/A 121 lb55 kg	N/A 222 lb101 kg	N/A 287 lb130 kg
Housing Center of Gravity¹¹	N/A 3.4 in86 mm	N/A 4.7 in119 mm	N/A	N/A 4.1 in104 mm	N/A 5.6 in142 mm
Releasing Volume New¹²	N/A 30 in³0.5 dm³	N/A 30 in³0.5 dm³	N/A 30 in³0.5 dm³	N/A 75 in³1.2 dm³	N/A 75 in³1.2 dm³
Water Volume	N/A 0.2 12	N/A 0.39 24	N/A 0.6 36	N/A 0.66 40	N/A 1.23 75
Lining Wear Volume	N/A 0.16 10	N/A 0.33 20	N/A 0.48 30	N/A 0.48 29	N/A 0.95 58
General Description	N/A Element construction and operation is illustrated in the figure. Pressurizing the unit compresses the brake springs and withdraws the water jackets from the brake discs. Heat generated at the friction interfaces is quickly transferred to the circulating coolant. Element sizes are indicated by the number of friction discs and the disc diameter in inches. For instance, size 224WCS has two friction discs 24 inches in diameter.
Features	N/A Unique friction couple. A specially formulated friction material, interfacing with a copper alloy surface, eliminates the stick-slip characteristic associated with ordinary frictional devices. Rapid heat dissipation. The copper interface conducts heat rapidly to the circulating coolant. Open or closed loop coolant systems. The element works equally well with open or closed loop circulating systems. On mobile equipment, the engine's cooling system can be tapped to provide coolant to the element. Optional corrosion protection For marine environment applications, protective coatings are available to minimize corrosion.
Where Used	N/A Logging Equipment Marine Mooring Systems Drilling rigs
Note	N/A	N/A	N/A Contact factory for dimensions.	N/A 1.06 in (27 mm) for 114WCS and 314WCS. 1.69 in (43 mm) for 214WCS.	N/A 1.06 in (27 mm) for 114WCS and 314WCS. 1.69 in (43 mm) for 214WCS.
Manufacturer	N/A Eaton-Airflex
Actuation	N/A Spring Applied, Air Release
¹ Tolerance Sizes 8WCS thru 24 WCS +0.000/0.003 (+0.00/-0.08) 36WCS +0.000/-0.005 (+0.00/-0.13) ² Tolerance +0.003/-0.000 in (+0.00/-0.00 mm) ³ American National Pipe Thread. ⁴ Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs. ⁵ Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs. ⁶ American National Pipe Thread. ⁷ Based upon a 70 ºF (21 ºC) fresh water inlet temperature and a 50 ºF (28 ºC) temperature rise between inlet and outlet. See cooling requirements. ⁸ To insure proper cooling, inlet port must be located at the six o'clock position. Maximum allowable inlet pressure is 45 psi (3.1 bar). ⁹ Based upon a continuous slip velocity of 4500 fpm (22.9 mps). ¹⁰ Maximum freewheeling velocity is 7500 fpm (38.1 mps) ¹¹ Located from mounting flange surface. ¹² Absolute volume of releasing cylinder.

4900 North 20th St. Philadelphia, PA 19144
P: (800) 925-8824 P: (215) 455-4900
F: (215) 455-8888 rowland@rowland2.com

Since 1732, The Rowland Company is a specialty distributor/fabricator of industrial power transmission components. The Rowland Company specializes in providing solutions to our customers, tailored to their specific needs. Typically, the products used in these applications are brakes, clutches, couplings, universal joints, gear boxes, variable speed drives, friction material, crane electrification and other related items.