Products Catalog
Type DC elements can be used as either pressure actuated clutches or brakes. They are available in single and multiple disc designs.

Pressurizing the cylinder causes the piston to clamp the friction disc assemblies between clamping plates. External springs ensure positive disengagement.

Type DC elements are available in five basic disc sizes with static torque ratings to 2,061,000 lb.in (233.000 N.m). Element sizes are indicated by the number of friction discs and by the disc diameter in inches. For instance, size 225DC has two friction discs 25 inches in diameter.
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Unit of Measure
Items
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DC Clutches and Brakes
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DC Clutches and Brakes
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DC Clutches and Brakes
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DC Clutches and Brakes
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DC Clutches and Brakes
Features N/A Favorable torque to size ratio.
DC type elements are physically smaller than most other type clutches and brakes with the same torque capacity.

Low inertia friction disc assembly.
Reduces the overall inertia that must be started or stopped.

Optional split friction discs.
Allows removal of friction discs without disturbing other components of drive system in mid-shaft element arrangement.

Long wearing, self lubricating PolyPak* seals.
Eliminates premature twisting failure and requires no external lubrication.
Where Used N/A
  • Power Presses
  • Tension Brakes
  • Emergency Stop Brakes on Unwind Stands
Dimension D1 N/A 1.75 in44 mm N/A 3.25 in83 mm N/A 2.88 in73 mm N/A 4.38 in111 mm N/A 3.00 in76 mm
W4 N/A 5.63 in143 mm N/A 7.63 in194 mm N/A 7.00 in178 mm N/A 9.00 in229 mm N/A 8.00 in203 mm
Dimension D46 N/A 0.25 in6 mm N/A 0.25 in6 mm N/A 0.38 in10 mm N/A 0.38 in10 mm N/A 0.75 in19 mm
Dimension D31 N/A 1.00 in25 mm N/A 1.00 in25 mm N/A 1.47 in37 mm N/A 1.47 in37 mm N/A 1.50 in38 mm
Dimension D44 N/A 0.25 in6 mm N/A 0.25 in6 mm N/A 0.38 in10 mm N/A 0.38 in10 mm N/A 0.38 in10 mm
Dimension H16 N/A 3.25 in83 mm N/A 3.25 in83 mm N/A 6.00 in152 mm N/A 6.00 in152 mm N/A 8.50 in216 mm
H Number N/A 3
H Size N/A 1/4-20NC-2 N/A 1/4-20NC-2 N/A 3/8-16NC-2 N/A 3/8-16NC-2 N/A 3/8-16NC-2
Bolt Circle N/A 3.50 in89 mm N/A 3.50 in89 mm N/A 6.50 in165 mm N/A 6.50 in165 mm N/A 9.13 in232 mm
Dimension J1 N/A 12.125 in308.0 mm N/A 12.125 in308.0 mm N/A 18.375 in466.7 mm N/A 18.375 in466.7 mm N/A 23.250 in590.6 mm
Dimension J12 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 N/A 18.250 in463.5 mm
Dimension J23 N/A 12.37 in314 mm N/A 12.37 in314 mm N/A 18.94 in481 mm N/A 18.94 in481 mm N/A 23.82 in605 mm
Dimension O2 N/A 3/8-14 NPT N/A 3/8-14 NPT N/A 1/2-14 NPT N/A 1/2-14 NPT N/A 1/2-14 NPT
Number of Friction Discs N/A 1 N/A 2 N/A 1 N/A 2 N/A 1
Size N/A 109DC N/A 209DC N/A 115DC N/A 215DC N/A 120DC
Dynamic Torque Rating at 75 psi (5.2 bar) N/A 10500 lb·in1190 Nm N/A 21000 lb·in2370 Nm N/A 41000 lb·in4630 Nm N/A 82000 lb·in9260 Nm N/A 77000 lb·in8690 Nm
Maximum Speed of Disc N/A 3000 rpm N/A 3000 rpm N/A 2400 rpm N/A 2400 rpm N/A 1850 rpm
Maximum Speed of Element N/A 1600 rpm N/A 1600 rpm N/A 1050 rpm N/A 1050 rpm N/A 850 rpm
Housing (Inertia) N/A 8 lb·ft²0.34 kg·m² N/A 9.5 lb·ft²0.40 kg·m² N/A 55 lb·ft²2.32 kg·m² N/A 65 lb·ft²2.74 kg·m² N/A 82 lb·ft²3.46 kg·m²
Disc & Gear (Inertia) N/A 0.5 lb·ft²0.02 kg·m² N/A 1 lb·ft²0.04 kg·m² N/A 5 lb·ft²0.21 kg·m² N/A 10 lb·ft²0.42 kg·m² N/A 35 lb·ft²0.72 kg·m²
Disc and Gear (Weight) N/A 9 lb4 kg N/A 18 lb8 kg N/A 35 lb16 kg N/A 64 lb29 kg N/A 35 lb77 kg
Housing (Weight) N/A 60 lb27 kg N/A 70 lb32 kg N/A 170 lb77 kg N/A 190 lb86 kg N/A 235 lb107 kg
Gear Part Number N/A 415313 N/A 415510 N/A 415454 N/A 415454 N/A 415900
Minimum Bore N/A 1.75 in44 mm N/A 1.88 in48 mm N/A 2.75 in70 mm N/A 3.44 in87 mm N/A 3.31 in97 mm
Maximum Bore N/A 2.38 in60 mm N/A 2.38 in60 mm N/A 3.98 in98 mm N/A 3.94 in100 mm N/A 5.63 in143 mm
Manufacturer N/A Eaton-Airflex
Actuation N/A Air (DC)
Note N/A Basic part number only. Gear not included.
Some high torque applications of three and four disc elements require additional support on the cylinder side of the unit. Contact your local Airflex representative for more details.
  • 1 Tolerance +0.000/-0.003 in (+0.00/-0.08 mm)
  • 2 Tolerance +0.003/-0.000 in (+0.08/-0.00 mm)
  • 3 Maximum diameter of "as cast" surfaces.