The Rowland Company
The Rowland Company
4900 North 20th St.
Philadelphia, PA 19144
Toll Free: (800) 925-8824
Phone: (215) 455-4900
Fax: (215) 455-8888
Email: rowland@rowland2.com
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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.
Unit of Measure

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

Specifications

Dimension D1

 N/A 3.25 in83 mm

W4

 N/A 7.63 in194 mm

Dimension D46

 N/A 0.25 in6 mm

Dimension D31

 N/A 1.00 in25 mm

Dimension D44

 N/A 0.25 in6 mm

Dimension H16

 N/A 3.25 in83 mm

H Number

 N/A 3

H Size

 N/A 1/4-20NC-2

Bolt Circle

 N/A 3.50 in89 mm
Dimension J1 N/A 12.125 in308.0 mm
Dimension J12 N/A 8.375 in212.7 mm
Dimension J23 N/A 12.37 in314 mm

Dimension O2

 N/A 3/8-14 NPT

Number of Friction Discs

 N/A 2

Size

 N/A 209DC

Dynamic Torque Rating at 75 psi (5.2 bar)

 N/A 21000 lb·in2370 Nm

Maximum Speed of Disc

 N/A 3000 rpm

Maximum Speed of Element

 N/A 1600 rpm

Housing (Inertia)

 N/A 9.5 lb·ft²0.40 kg·m²

Disc & Gear (Inertia)

 N/A 1 lb·ft²0.04 kg·m²

Disc and Gear (Weight)

 N/A 18 lb8 kg

Housing (Weight)

 N/A 70 lb32 kg

Gear Part Number

 N/A 415510

Minimum Bore

 N/A 1.88 in48 mm

Maximum Bore

 N/A 2.38 in60 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.