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Dynabrade contact arm assembly, steel with rubber wheel, one inch by three eighths inch

Dynabrade Products

Dynabrade Products 11204 Contact Arm Assembly 1 In x 3/8 In

SKU CH-1D0F-WX50Y

Contact arm assembly fits Dynafile tools 40320, 40321, 40324, 40326 and 40330, includes bearings, shaft and 18 in belt contact wheel

  • Product type1 In x 3/8 In
  • Fits Dynafile models 40320 40321 40324 40326 40330
  • 1 in wheel diameter with 3/8 in width for precise contact
  • 18 in belt length supports standard abrasive belts
  • Rubber wheel on steel arm delivers durable performance
  • Includes two bearings shaft and contact wheel assembly

Contact Arm for Dynafile Tools

The Dynabrade 11204 contact arm assembly fits Dynafile models 40320, 40321, 40324, 40326 and 40330. It accepts belt widths of 1/4 in and 1/2 in on an 18 in belt length. The unit includes a steel contact wheel, shaft, platen pad and two bearings.

Thermals Noise and Power

This mechanical component generates no heat, noise or electrical draw during operation. Performance depends entirely on the host pneumatic tool and the selected abrasive belt. No power supply or cooling is required.

Build Fit and Clearance

The 1 in diameter by 3/8 in wide rubber wheel mounts directly to compatible Dynafile grinders without adapters. It frees the operator to run narrow belts for detail work or wider belts for stock removal. No additional hardware is needed beyond the host tool.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $59.99
Pricier than about 77% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameDynabrade
Product type1 In x 3/8 In

Questions about this item

How do I install the 11204 contact arm on my Dynafile and which step is often missed?

Remove the old arm, slide the new assembly onto the tool’s drive shaft, then secure the two included bearings onto the shaft before tightening — skipping the bearing reinstall is the common error.

What parts of the 11204 contact arm will need replacement after extended use?

The rubber contact wheel and the two supplied bearings are the wear items; the steel arm and platen pad do not have a scheduled replacement interval.

What limit appears first when running the 11204 contact arm continuously on an 18 in belt?

Heat buildup in the rubber wheel and bearing friction typically limits sustained operation before the steel arm or shaft shows any fatigue.

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