Universal Tool
Universal Tool UT8780-1 - 4-1/2 in. Air Angle Grinder
Universal Tool UT8780-1 - 4-1/2 in. Air Angle Grinder
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Universal Tool UT8780-1 (US) / UT9750A (UK) — 4-1/2-in Pneumatic Angle Grinder
Full-size angle grinder for metal grinding, weld cleanup and broad surface preparation. The two region codes are printed on the original box. Use only manufacturer-approved wheels and guards.
Which Universal Tool grinder is right for the job?
Compare the tools by application and accessory type. All accessories are sold separately and must be approved for the actual tool and operating speed.
| Model | Tool | Compatible accessory category* | Typical work |
|---|---|---|---|
| UT8710-25 | 1/4-in straight die grinder | Shank-mounted carbide burrs, approved mounted stones | Detailed deburring, weld edges |
| UT8724 | 1/4-in die grinder | Compatible burrs and mounted abrasives | Precision grinding and controlled finishing |
| UT8724-20 | 1/4-in angle die grinder | Compatible small mounted abrasives | Tight-access deburring and finishing |
| UT8724T-20 | 1/4-in angle die grinder, distinct T model | Manufacturer-approved holders and abrasives; confirm mount | Tight-access grinding and surface blending |
| UT8780-1 / UT9750A | 4-1/2-in angle grinder | Approved guarded 4-1/2-in grinding and flap wheels | Weld cleanup and broad surface prep |
| UT8784-5 | 5-in angle grinder | Approved guarded 5-in grinding and flap wheels | Fabrication, heavier grinding and surface prep |
| UT8711-T | Precision turbine grinder | Manufacturer-approved miniature burrs or grinding points; verify exact holder and RPM | Fine deburring and intricate finishing |
Accessories and application guide
Carbide burrs: Metal deburring, detail work, and weld edge cleanup. Select the right burr geometry, shank diameter and manufacturer-approved maximum RPM. M.A. Ford carbide tooling may be sourced upon request.
Mounted grinding stones: Small-area grinding and finishing where the specific stone size, shank and RPM rating suit a compatible die grinder.
Sanding and surface-conditioning: Choose an approved holder, spindle fitting and abrasive disc for the specific tool. The UT8724T-20 is a distinct model; do not interchange accessories with the UT8724-20 without checking the exact interface.
4-1/2-in and 5-in wheels: The UT8780-1 and UT8784-5 are larger angle grinders requiring the correct guards, flanges, compatible discs and operating-speed ratings. Do not assume cut-off operations are approved.
Precision turbine grinding: The UT8711-T requires accessories suitable for its high operating speed; do not install standard die-grinder stones or burrs without explicit manufacturer suitability.
Important: Use the original manufacturer manual to confirm permitted accessory type, maximum diameter, shank/spindle specifications, speed rating and PPE. Application descriptions are examples, not tool approval for specific aircraft maintenance or regulated procedures.
Additional tools, accessories and pricing available upon request. Contact Arclight for grinder-and-accessory bundle pricing and sourcing through our distribution partners.