Contact us today:800.925.8824 Email
REQUEST FOR QUOTE
Search Catalog
        
 All Categories    WCB2 Disc Brake Elements
All Categories > Clutches and Brakes > Tension Brakes > Airflex® Water Cooled Brakes > WCB2 Disc Brake Elements > Item # 146476  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites

Item # 146476, WCB2 Single Piston



WCB elements are disc type, externally cooled units. They are designed to absorb and dissipate the thermal loads associated with the most severe clutch and brake applications. The WCB friction couple was developed specifically for continuous slip service and has a dynamic coefficient of friction that is greater than its static coefficient of friction. Also available, special high coefficient linings, which provide 50% higher torque than standard friction linings and provide a 1:1 dynamic to static torque ratio. Element construction and operation is illustrated. Pressurizing the cylinder causes the piston to clamp the friction disc between the water jackets. Heat generated at the friction interface 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 224WCB has two (2) friction discs 24 inches in diameter.



Unit of Measure: Imperial Metric Both

Specifications  · Where Used  · Features  · Note

Specifications

Size

448WCB

Dimension D24

1.48 in
38
mm

Dimension D25

2.70 in
69
mm

Dimension D43

5.80 in
147
mm

Dimension G1

56.50 in
1435.0
mm

Number of Bolt Holes H3

16

Bolt Hole Size H3

1 3/8-6

Bolt Circle Diameter H32

58.688 in
1490.7
mm

Dimension H10

25.19 in
640
mm

Dimension J1

23.00 in
584
mm

Dimension J23

57.09 in
1450
mm

Number H4

3

Size H4

3/4-10 in
3/4-10
mm

Bolt Circle H4

24.500 in
622.3
mm

Single Piston Size

1-11.5

Piston Inlet Bolt Circle Diameter

41.500 in
1054.1
mm

Minimum Bore Size

11.250 in
286
mm

Maximum Bore Size

16.81 in
427
mm

Dimension D

37.70 in
780
mm

Dimension D1

22.50 in
572
mm

Dimension D2

31.36 in
797
mm

Number of Coolant Ports (O)4

16

Coolant Port Thread Size5

1 1/4 SAE ORB

Gear Part Number

416797

Dynamic Torque Rating6

2744000 lb-in @ 80 psi
310030 Nm @ 5.5 bar

Thermal Rating7

5200 hp
3878
kW

Water Flow8

520 gpm
19684
dm³/min

Maximum Slip Speed9

360 rpm

Maximum Freewheeling Speed10

600

Housing (Weight)

7719 lb
3501
kg

Disc & Gear (Weight)

3186
1445

Disc & Gear (Inertia)

249.31
5916

Housing (Inertia)

24583 lb·ft²
1035.95
kg·m²

Water Volume

2800 in³
45.9
dm³

Manufacturer

Eaton-Airflex

Actuation

Air Applied
1 Tolerance Sizes 8WCB thru 24WCB
+0.000/-0.003 (+0.00/-0.08)
36WCB +0.000/-0.005 (+0.00/-0.13)
48WCB +0.000/-0.005 (+0.00/-0.13)
2 American National Standard for Unified Screw Threads
3 Maximum diameter of "as cast" surfaces
4 American National Pipe Thread
5 American National Pipe Thread
6 Exact torque rating is dependent upon applied pressure. Maximum allowable pressure is 150 psi (10.3 bar).
7 Exact torque rating is dependent upon applied pressure. Maximum allowable pressure is 150 psi (10,3 bar).maximum allowable outlettemperatures are 150ºF (65ºC) for fresh water; 165ºF (74ºC) for 70/30 and 60/40 water glycol mixes; and 170ºF (77ºC) for 50/50 water glycol mixes.
8 To insure proper cooling, inlet port must be at the six o’clock position. Flow rates shown are for fresh water, flow rates for water glycol mixes must increase to achieve the ratings in the Thermal Rating column. Maximum allowable inlet pressure - 65 psi
9 Based upon a continuous slip velocity of 4500 fpm (22.9 mps).
10 Maximum freewheeling velocity is 7500 fpm (38.1 mps).


Where Used
  • Drilling rigs
  • Dynamometer
  • Logging equipment
  • Marine mooring systems
  • Slip clutches
  • Tension brakes
  • Unwind stands




Features
Patented piston design
Single or dual piston provides wider range of applied tension with greater control.

Drop in powerhead package
Standard single piston elements can be retrofitted with a dual piston powerhead to provide increased control.

Split wear spacers
The split wear spacers allow for wear adjustment without disassembly of the brake to minimize downtime and maintenance costs.

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.



Note
1.96 in (50 mm) for 148WCB
1.75 in (44 mm) for 248WCB
1.75 in (44 mm) for 348WCB
1.75 in (44 mm) for 448WCB
Basic part number only. Order gear separately.



 MORE IMAGES 

·  WCB2 Disc Brake Elements Mounting Circles


 DOWNLOADS 

WCB2/WBCD Disc Brake Elements Component Parts
(PDF, 213KB)