ATI443 SERIES, Microstops

  • For lower volume countersinking in maintenance and home-build environments.
  • Bronze bushing shaft support.
  • Heavy duty ball thrust bearing ensures depth repeatability.
  • Fail-safe design accomplished with integrated shoulder on shaft.
  • .0005" depth adjustment.
  • 5/16" shaft travel.
  • Righ-hand thread lock nut prevents jamming of adjustment mechanism.
  • Multiple skirt configuration options.
  • Multiple shaft configuration options.

Recognized throughout the industry as a leading producer of quality cutting tools, ATI Tools give the industry tools that are designed for high-rate production in the full range of metals used in aircraft manufacturing and maintenance.

The tools contained in this section are made of the finest tool steel and carbides. The cutters are carefully heat-treated, precision ground for correct cutting angles and proper clearance, then thoroughly checked to ensure accurate cutting without chatter. After final inspection, all tools are dipped in a protective plastic coating for shipment and storage.

A variety of microstop countersink units and accessories have been designed to present a versatile selection of tools for all working surfaces and areas.

PART # SKIRT DESCRIPTION SKIRT CAPACITY SHAFT THREAD SHAFT SHANK
ATI443A1 PHENOLIC INSERT 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443A2 PHENOLIC INSERT 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443A3 PHENOLIC INSERT 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443B1 2-LEGGED 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443B2 2-LEGGED 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443B3 2-LEGGED 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443C1 CLOSE 5/16" 1/4-28 FEMALE 1/4" ROUND
ATI443C2 CLOSE 5/16" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443C3 CLOSE 5/16" 1/4-28 FEMALE QUICK CHANGE
ATI443D1 BELL 1" 1/4-28 FEMALE 1/4" ROUND
ATI443D2 BELL 1" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443D3 BELL 1" 1/4-28 FEMALE QUICK CHANGE
ATI443E1 STRAIGHT CUTAWAY 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443E2 STRAIGHT CUTAWAY 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443E3 STRAIGHT CUTAWAY 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443F1 FLANGED 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443F2 FLANGED 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443F3 FLANGED 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443G1 FLANGED CUTAWAY 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443G2 FLANGED CUTAWAY 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443G3 FLANGED CUTAWAY 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443H1 NYLON FLANGE INSERT 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443H2 NYLON FLANGE INSERT 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443H3 NYLON FLANGE INSERT 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443N1 NYLON INSERT 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443N2 NYLON INSERT 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443N3 NYLON INSERT 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443S1 STRAIGHT 3/4" 1/4-28 FEMALE 1/4" ROUND
ATI443S2 STRAIGHT 3/4" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443S3 STRAIGHT 3/4" 1/4-28 FEMALE QUICK CHANGE
ATI443W1 FLANGED BELL 1" 1/4-28 FEMALE 1/4" ROUND
ATI443W2 FLANGED BELL 1" 1/4-28 FEMALE 3 CHUCK FLATS
ATI443W3 FLANGED BELL 1" 1/4-28 FEMALE QUICK CHANGE

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  1. ATI443A1

    ATI443A1

    $42.81

    • ATI443A1
    • Straight Skirt w/ Phenolic insert
    • 3/4" Capacity
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  2. ATI443A2

    ATI443A2

    $43.70

    • ATI443A1
    • Straight Skirt w/ Phenolic Insert
    • 3/4" Capacity
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  3. ATI443A3

    ATI443A3

    $44.99

    • ATI443A3
    • Straight Skirt w/ Phenolic Skirt
    • 3/4" Capacity
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  4. ATI443B1

    ATI443B1

    $40.03

    • ATI443B1
    • 2-Legged skirt
    • 3/4" Capacity
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  5. ATI443B2

    ATI443B2

    $40.91

    • ATI443B2
    • 2-Legged Skirt
    • 3/4" Capacity
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  6. ATI443B3

    ATI443B3

    $42.20

    • ATI443B3
    • 2-Legged Skirt
    • 3/4" Capacity
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  7. ATI443C1

    ATI443C1

    $40.15

    • ATI443C1
    • Close Skirt
    • 5/16" Capacity
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  8. ATI443C2

    ATI443C2

    $41.03

    • ATI443C2
    • Close Skirt
    • 5/16" Capacity
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  9. ATI443C3

    ATI443C3

    $42.31

    • ATI443C3
    • Close Skirt
    • 5/16" Capacity
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  10. ATI443D1

    ATI443D1

    $41.24

    • ATI443D1
    • Bell Skirt
    • 1" Capacity
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  11. ATI443D2

    ATI443D2

    $42.11

    • ATI443D2
    • Bell Skirt
    • 1" Capacity
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  12. ATI443D3

    ATI443D3

    $43.39

    • ATI443D3
    • Bell Skirt
    • 1" Capacity
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  13. ATI443E1

    ATI443E1

    $40.15

    • ATI443E1
    • Straight Cutaway Skirt
    • 3/4" Capacity
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  14. ATI443E2

    ATI443E2

    $41.03

    • ATI443E2
    • Straight Cutaway Skirt
    • 3/4" Capacity
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  15. ATI443E3

    ATI443E3

    $42.31

    • ATI443E3
    • Straight Cutaway Skirt
    • 3/4" Capacity
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  16. ATI443F1

    ATI443F1

    $39.96

    • ATI443F1
    • Flanged Skirt
    • 3/4" Capacity
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  17. ATI443F2

    ATI443F2

    $40.81

    • ATI443F2
    • Flanged Skirt
    • 3/4" Capacity
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  18. ATI443F3

    ATI443F3

    $42.06

    • ATI443F3
    • Flanged Skirt
    • 3/4" Capacity
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  19. ATI443G1

    ATI443G1

    $41.24

    • ATI443G1
    • Flanged Cutaway Skirt
    • 3/4" Capacity
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  20. ATI443G2

    ATI443G2

    $42.11

    • ATI443G2
    • Flanged Cutaway Skirt
    • 3/4" Capacity
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  21. ATI443G3

    ATI443G3

    $43.39

    • ATI443G3
    • Flanged Cutaway Skirt
    • 3/4" Capacity
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  22. ATI443H1

    ATI443H1

    $42.71

    • ATI443H1
    • Flanged Skirt w/ Nylon Insert
    • 3/4" Capacity
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  23. ATI443H2

    ATI443H2

    $43.56

    • ATI443H2
    • Flanged Skirt w/ Nylon Insert
    • 3/4" Capacity
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  24. ATI443H3

    ATI443H3

    $44.85

    • ATI443H3
    • Flanged Skirt w/ Nylon Insert
    • 3/4" Capacity
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