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Astro Pneumatic 1221 Composite Body, 1/4 Inch, 90° Die Grinder + Mini Die Grinder Kit Astro Pneumatic AST.1221
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Astro Pneumatic 1221 Composite Body, 1/4 Inch, 90° Die Grinder + Mini Die Grinder Kit

Item # AST.1221
$156.53
Quantity:      On Hand: 6QTY_CHECK:6-net:-DB:6-VSTOCK:0  Sold As: each
 
 
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Overview

 

Astro Pneumatic 1221 Composite Body, 1/4 Inch, 90° Die Grinder + Mini Die Grinder Kit

  • The Astro Pneumatic 1221 kit includes a composite-body 1/4 inch 90° angle die grinder (front exhaust), a mini die grinder, and an 8 piece double cut carbide rotary burr set ideal for precision metal grinding and shaping in tight and general access areas.
  • Features:
    • Composite bodies reduce vibration and lower operator fatigue.
    • 90° angle grinder (front exhaust) offers access in confined spaces.
    • Mini die grinder features lever throttle and built-in regulator for precise speed control.
    • 8-piece rotary burr set (1/4-inch shank) covers common shapes: cylindrical, radius end, ball, tree shapes.
  • Includes:
    • 1/4" 90° angle die grinder (front exhaust)
    • 1/4" mini die grinder with safety lever
    • SA-5 cylindrical burr 1/2" x 1"
    • SA-3 cylindrical burr 3/8" x 3/4"
    • SC-3 cylindrical radius end burr 3/8" x 3/4"
    • SC-1 cylindrical radius end burr 1/4" x 5/8"
    • SD-1 ball burr 1/4"
    • SD-3 ball burr 3/8"
    • SF-3 tree radius end burr 3/8" x 3/4"
    • SF-5 tree radius end burr 1/2" x 1"
  • Specifications:
    • Manufacturer: Astro Pneumatic
    • Part Number: 1221
    • Collet Size: 1/4 inch (for both grinders)
    • Angle Grinder Free Speed: 20,000 rpm
    • Mini Grinder Free Speed: 25,000 rpm
    • Air Inlet Thread: 1/4 inch NPT
    • Air Hose I.D. Size: 3/8 inch
    • Average Air Consumption: 3 cfm per tool
    • Operating Air Pressure: 90-120 psi
    • System Compatibility: suitable for die grinding and shaping metal surfaces in both tight and open areas, replacing multiple separate tools
  • The Astro Pneumatic 1221 can also be referred to as 1221 die grinder combo, composite body grinder kit 1221, 1221 burr set kit, 1/4 inch grinder combo, and Astro 1221 burr & grinder set.

Astro Pneumatic manufactures professional air tools and shop equipment, including the ONYX series of compact impact wrenches engineered for high torque and accessibility in cramped applications.

Q: What burr shapes and sizes does the included set cover?
A: The set includes eight double cut carbide burrs on 1/4-inch shanks: SA-5, SA-3, SC-3, SC-1, SD-1, SD-3, SF-3, SF-5 with cylindrical, radius, ball, and tree-shape variants.

Q: What are the speed ratings of the grinders?
A: The 90° angle grinder runs at 20,000 rpm, while the mini inline grinder is rated at 25,000 rpm.

Q: Are both grinders air powered, and what air specs are required?
A: Yes, both are pneumatic. They require 90-120 psi air pressure and roughly 3 cfm air consumption with 1/4 inch NPT inlet and 3/8 inch minimum hose size.