To receive the most up-to-date product availability, pricing and delivery options, enter your zip code or log in to your account
Zip Code should not be blankEmail and Password should not be blank
Enter Delivery Zip Code
or
Log In
TELL US MORE
Are you currently located in California?
8 characters minimum
One number
One lowercase letter
One uppercase letter
One special character (!@#$%&*)
Password cannot contain space
Pursuant to CA SB 478, if you are located in California, Airgas cannot display your product pricing until all items have been added to your shopping cart so that we can calculate all applicable fees, including, but not limited to, shipping and handling fees.
The Dynabrade 11239 is a heavy-duty contact arm assembly designed for industrial pneumatic abrasive belt tools. It serves as a high-durability replacement and modular upgrade for standard arms, specifically engineered to guide and track narrow abrasive belts in high-pressure production environments. This assembly is the heavy-duty version of the 11213 arm and features a full steel construction to prevent deflection during aggressive stock removal.
Features
Heavy-duty steel arm bar construction to minimize bending and twisting under leveraged force
Solid steel contact wheel for zero surface compliance and maximum grain penetration
Precision-crowned wheel face for automatic belt centering and tracking
Integrated 1/2 inch wide thin platen pad for flat grinding and surface profiling
Industrial-rated for continuous multi-shift production line usage
Compact profile for access to restricted channels, deep slots, and acute corners
Heat-resistant metallurgy to maintain tolerances during prolonged metal-on-metal grinding
Sealed internal bearings to prevent lateral belt wandering at high surface speeds
Modular compatibility with 11739 Adapter for extended 8-inch reach
Specifications
Manufacturer: Dynabrade Inc.
Part Number: 11239
UPC: 616026112391
Contact Wheel Diameter: 5/16 in (7.94 mm)
Contact Wheel Width: 3/8 in (9.52 mm)
Contact Wheel Material: Solid Steel
Contact Wheel Geometry: Precision-crowned
Contact Wheel Assembly Part Number: 11068 (includes bearing and shaft)
Arm Material: High-tensile structural steel (11213 Heavy-Duty Steel Arm Bar)
Platen Pad Part Number: 11027
Platen Pad Width: 1/2 in
Platen Pad Type: Thin
Abrasive Belt Width Compatibility: 1/2 in (13 mm)
Abrasive Belt Length Compatibility: 24 in (610 mm)
Workable Reach Range: 4 in to 14 in
Maximum Guide Pressure: 45 PSIG (3.1 Bar)
Maximum Tool Inlet Air Pressure: 90 PSIG (6.2 Bar / 620 kPa)
Net Weight: 0.17 lbs (0.077 kg)
Country of Origin: United States of America
ANSI Compliance: B7.7 code for portable abrasive construction
Tool Compatibility: Dynafile, Dynafile II, Vacuum Dynafile II, Dynafile III, Dynabelter Models 11475 and 11476
Includes
Contact wheel assembly, platen pad
Applications
Aerospace: Blending and polishing turbine blades, stator vanes, and internal housing geometries
Heavy Steel Fabrication: Grinding structural through-bolts and smoothing deep fillet welds
