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Silver pneumatic pistol-grip disc sander with hook-and-loop pad

Chicago Pneumatic

Chicago Pneumatic CP9778 5" Air Disc Sander 14000 rpm 0.5 hp

SKU CH-GC4T-M5A3T

5-inch pneumatic disc sander reaching 14,000 rpm with variable speed and hook-and-loop pad mounting

  • Product typeSanders
  • Variable speed delivers control for fine finishes
  • 14000 rpm removes material quickly on metal and wood
  • 5 hp motor sustains power through extended jobs
  • Hook-and-loop pad change cuts downtime between grits
  • 21 cfm air use matches standard shop compressors

Chicago Pneumatic CP9778 5" Air Disc Sander

This air-powered disc sander runs at 14000 rpm and delivers 0.5 hp for medium-duty sanding tasks. The pistol-grip design provides control during extended use on automotive or metal surfaces.

Check air supply and pad compatibility

Verify your compressor can supply 21 cfm at 90 psi through a 1/4 in NPT inlet with a minimum 3/8 in hose. The sander accepts hook-and-loop pads from 3 in to 7 in and uses a 7/16 in - 20 spindle thread.

Sustained load performance

Variable speed control lets you match rpm to the material without stalling under continuous pressure. The non-vacuum design requires external dust extraction for clean operation during long sessions.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $107.99
Pricier than about 84% of the 477 comparable items (median $21.99).

Specifications

Product
Brand nameChicago Pneumatic
Product typeSanders

Questions about this item

Does the CP9778 sander come with abrasive discs or must they be purchased separately?

The sander includes hook-and-loop backing pads in 3 in, 4 1/2 in and 5 1/2 in sizes; abrasive discs are not included and must be bought separately.

Which pad size suits the 14000 rpm maximum disc speed for fine finishing work?

The 3 in pad runs at the full 14000 rpm and is best for fine finishing; larger pads cover more area but operate at the same top speed.

Will a 21 cfm compressor at 90 psi keep the 0.5 hp motor running continuously?

Yes, the tool requires 21 cfm at 90 psi through a 3/8 in hose; a compressor meeting that flow will sustain continuous operation.

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