Products Catalog
Form VC-504
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Unit of Measure
Items
Dual Wide VC Elements

Dual Wide VC Elements
Dual Wide VC Elements

Dual Wide VC Elements
Dual Wide VC Elements

Dual Wide VC Elements
Dual Wide VC Elements

Dual Wide VC Elements
Dual Wide VC Elements

Dual Wide VC Elements
Size N/A 16VC1000 N/A 20VC1000 N/A 24VC1000 N/A 28VC1000 N/A 32VC1000
Torque Rating (75 psi/5.5 bar) N/A 228000 lb·in25760 Nm N/A 322000 lb·in36380 Nm N/A 438000 lb·in49490 Nm N/A 592000 lb·in66890 Nm N/A 830000 lb·in93780 Nm
Maximum Speed1 N/A 1400 rpm N/A 1300 rpm N/A 1250 rpm N/A 1100 rpm N/A 1050 rpm
Centrifugal Loss Cs N/A 1.86 E-06 bar/rpm2 27 E-06 psi/rpm2 N/A 2.55 E-06 bar/rpm2 37 E-06 psi/rpm2 N/A 3.17 E-06 bar/rpm2 46 E-06 psi/rpm2 N/A 3.80 E-06 bar/rpm2 55 E-06 psi/rpm2 N/A 4.35 E-06 bar/rpm2 63 E-06 psi/rpm2
Inertia N/A 380 lb·ft²15.96 kg·m² N/A 618 lb·ft²25.96 kg·m² N/A 1104 lb·ft²46.37 kg·m² N/A 1652 lb·ft²69.38 kg·m² N/A 3140 lb·ft²131.9 kg·m²
Weight N/A 430 lb195 kg N/A 568 lb257 kg N/A 756 lb342 kg N/A 862 lb390 kg N/A 1248 lb565 kg
Friction Area N/A 940 in²6063 cm² N/A 1270 in²8192 cm² N/A 1440 in²9288 cm² N/A 1680 in²10836 cm² N/A 1920 in²12384 cm²
New Friction N/A 0.32 in8 mm N/A 0.32 in8 mm N/A 0.44 in11 mm N/A 0.44 in11 mm N/A 0.57 in14 mm
Worn Lining Thickness N/A 0.16 in4 mm N/A 0.16 in4 mm N/A 0.16 in4 mm N/A 0.16 in4 mm N/A 0.38 in10 mm
Air Tube Cavity N/A 510 in³8.36 dm³ N/A 620 in³10.2 dm³ N/A 930 in³15.3 dm³ N/A 1060 in³17.4 dm³ N/A 1200 in³19.7 dm³
Minimum Drum Diameter2 N/A 15.91 in404 mm N/A 19.87 in505 mm N/A 23.87 in606 mm N/A 27.81 in706 mm N/A 31.81 in808 mm
Dimension D2 N/A 23.69 in602 mm N/A 23.69 in602 mm N/A 23.69 in602 mm N/A 23.69 in602 mm N/A 23.81 in605 mm
Dimension D3 N/A 0.31 in8 mm N/A 0.31 in8 mm N/A 0.39 in10 mm N/A 0.39 in10 mm N/A 0.39 in10 mm
Dimension D25 N/A 0.63 in16 mm
Dimension G N/A 25.500 in647.7 mm N/A 29.500 in749.3 mm N/A 34.000 in863.6 mm N/A 38.000 in965.2 mm N/A 43.875 in1114.4 mm
Tolerance for Sizes (G) N/A +0.000/-0.005 in+0.00/-0.13 mm N/A +0.000/-0.005 in+0.00/-0.13 mm N/A +0.000/-0.008 in+0.00/-0.20 mm N/A +0.000/-0.008 in+0.00/-0.20 mm N/A +0.000/-0.010 in+0.00/-0.25 mm
Dimension H2 N/A 24.375 in619.1 mm N/A 28.375 in720.7 mm N/A 32.750 in831.9 mm N/A 36.750 in933.5 mm N/A 42.625 in1082.7 mm
Dimension H6 N/A 16.22 in412 mm N/A 20.22 in514 mm N/A 24.22 in615 mm N/A 28.22 in717 mm N/A 32.22 in818 mm
Dimension H7 N/A 24.38 in619 mm N/A 28.38 in721 mm N/A 32.50 in826 mm N/A 36.50 in927 mm N/A 42.13 in1070 mm
Number of Hole L N/A 12 N/A 12 N/A 16 N/A 16 N/A 24
Tolerance for L N/A +0.005/-0.000 in+0.13/-0.00 mm
Dimension L Diameter N/A 0.500 in12.7 mm N/A 0.500 in12.7 mm N/A 0.625 in15.9 mm N/A 0.625 in15.9 mm N/A 0.625 in15.9 mm
O3 Number N/A 4
Size O3 N/A 0.38 in10 mm N/A 0.38 in10 mm N/A 0.50 in13 mm N/A 0.50 in13 mm N/A 0.50 in13 mm
Angle Q N/A 15.000 º N/A 15.000 º N/A 11.250 º N/A 11.250 º N/A 7.500 º
Dimension V N/A 0.78 in20 mm N/A 0.78 in20 mm N/A 0.78 in20 mm N/A 0.78 in20 mm N/A 0.81 in21 mm
W Number N/A 16 N/A 16 N/A 20 N/A 20 N/A 24
Friction Shoe Width (W) N/A 22.13 in562 mm N/A 22.13 in562 mm N/A 22.13 in562 mm N/A 22.13 in562 mm N/A 23.19 in589 mm
General Description N/A VC design and construction is different from the CB and CM elements in that the torque is transmitted by torque bars rather than the sidewalls of the actuating tube. The loose actuating tube is contained within a housing formed by a rim and two side plates. and is replaceable. The torque bars, which are held in position by the side plates, pass through cavities in the backing plates of the friction shoes. Pressurizing the actuating tube forces the friction shoes to engage around a cylindrical drum. Leaf springs in the torque bar cavities of the backing plates retract the friction shoes when the actuating tube pressure is released. Element torque capacity is dependent upon the applied pressure and rotating speed. Catalog ratings are given at 75 psi (5.2 bar) and zero rpm. Maximum recommended pressure is 125 psi (8.6 bar). Adjustment for pressure and speed is explained under Selection Procedure.

VC elements are available in 24 sizes which are identified by the drum diameter in inches on which they constrict and the width in inches of its friction lining. For a given drum diameter it is possible to have two different lining widths. For this reason, the elements are grouped by lining width into a narrow series and a wide series. As an example, the narrow series 20VC600 and the wide series 20VC1000 both constrict on a 20 inch diameter drum. But, the narrow unit has a lining width of 6 inches, and the wide unit has a lining width of 10 inches. The smallest VC element will constrict on a 11.5 inch (292 mm) diameter drum and the largest on a 76 inch (1930 mm) diameter drum.

Two elements of a narrow series can be bolted together to form a dual element having twice the torque capacity of a single element. With the exception of the 14VC1000 element, the wide series elements can also be dualed. The large drum hub diameter and small drum diameter restricts the radial space available for mechanically connecting the drums to the hub and makes dualing the 14VC1000 elements impractical.

The VC design offers the following features in addition to the constricting features described earlier in this section.
Features N/A Ventilated Construction

Friction shoe backing plates have large air passages through their entire length. This construction coupled with scalloped side plates allows cooling air to flow through the element. In addition, the large exposed inside diameter assures the coolest possible operation. None of the heat is generated deep in the element's internal parts where it can be trapped. The open construction assures rapid heat dissipation.



Serviceability

The VC clutch can be dismantled on the shaft to gain access to its component parts. All parts are available as replacement parts.

A limited number of element sizes are available in a split configuration. They are used in applications having limited axial access for element maintenance. The following pages give additional descriptive information, selection procedures and common clutch and brake arrangements for the complete VC product line.
Where Used N/A
  • Grinding Mills
  • Marine Propulsion
  • Metal Forming Machinery
  • Oil Field Machinery
Note N/A Part Number refers to basic part number only. When ordering, the number of air inlets and type of connection must be specified.
Manufacturer N/A Eaton-Airflex
Actuation N/A Air Applied
  • 1 Maximum rpm is dependent upon operating conditions and varies for each application. Consult factory for applications exceeding these speeds.
  • 2 Drum contact with worn shoes.