Page 107 - Michigan Drill

Carbide Tipped Masonry Drills

Straight Shank
List No. CT890 – 4" OAL, Regular Helix
List No. CT891 – 6" OAL, Regular Helix List No. CT890F – 4" OAL, Fast Helix
List No. CT892 – 12" OAL, Regular Helix List No. CT891F – 6" OAL, Fast Helix
List No. CT893 – 18" OAL, Regular Helix List No. CT892F – 12" OAL, Fast Helix
For drilling brick, stone, slate, marble, cement, concrete, carbon, HOLE MAKING
asphalt, plaster and wallboard. These drills may be used in portable
electric drills, drill presses, or other fixed spindle machine tools.
Price Each
4" OAL
12" OAL
6" OAL
6" OAL
4" OAL
Size Shank Size CT890 CT890F CT891 CT891F 12" OAL CT892F 18" OAL
CT893
CT892
1/8 1/8 3.29* 3.29* 3.47 — 8.18 — 13.20
5/32 5/32 3.47* — — — — — —
11/64 11/64 3.47* 3.47* — — — — —
4.50mm 4.50mm 3.53 — — — — — —
3/16 3/16 3.53 3.53 3.56 3.56 8.42 — 13.90
7/32 7/32 3.63 — 3.70 — — — —
5.50mm 5.50mm 3.53 — — — — — —
15/64 15/64 3.70 3.70* — — — — —
1/4 1/4 3.70 3.70 3.70 3.70 8.55 8.55 13.17
9/32 1/4 3.80 — 4.13 — — — —
5/16 1/4 3.86 3.86 4.29 4.29 9.08 9.08 14.85
3/8 1/4 4.16 4.16 4.42 4.42 10.23 10.23 —
3/8 5/16 — — — — — — 15.84
3/8 3/8 — 4.16 4.42 — 10.23 — 15.84
7/16 1/4 4.75 4.75 4.72 4.72 12.21 — —
7/16 3/8 — — 4.72 4.72 12.21 12.21 19.01
15/32 1/4 — — 5.12 — — — —
1/2 1/4 4.82 4.82 5.12 5.12 12.47 12.47 —
1/2 3/8 — — 5.12 5.12 12.47 12.47 19.47
9/16 3/8 — — 7.10 7.10 — — —
9/16 1/2 — — 7.10 7.10 14.19 — 22.44
5/8 1/4 6.80 — — — — — —
5/8 3/8 6.80 — 8.25 — 15.68 15.68 23.76
5/8 1/2 — — 8.25 8.25 15.68 — 23.76
11/16 1/2 — — 9.01 9.01 18.41 — 27.72
3/4 1/2 — — 9.74 9.74 18.81 18.81** 28.38
7/8 1/2 — — 12.38 12.38 22.37 — 34.32
31/32 1/2 — — 15.18 — — — —
1 1/2 — — 15.18 15.18 25.74 25.74 38.94
1-1/8 1/2 — — 21.78 — 32.34 — 55.44
1-1/4 1/2 — — 28.38 — — — 58.74
1-3/8 1/2 — — 38.28 — 51.48 — 82.50
1-1/2 1/2 — — 39.27 — — — 75.90
** 3/8" Shank * 3" Overall Length
Sets
Sizes Description Container Pcs. Set No. Price Carbide Tipped
1/4, 5/16, 3/8, 1/2 Regular Helix – 4" OAL Polytube 4 CT890S 16.50 Masonry Drills
3/16, 1/4, 5/16, 3/8, 1/2, 5/8* Regular Helix – 4" OAL Polytube 6 CT890S-6 28.32 Price Each
1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 Regular Helix – 6" OAL Polytube 7 CT891S-7 29.28 Size 4" OAL 6" OAL
1/4, 5/16, 3/8, 1/2, 5/8, 3/4 Regular Helix – 6" OAL Polytube 6 CT891S-6 35.52 XCT890 XCT891
Contains one of each size 1/4 1.80 2.10
1/4, 5/16, 3/8, 7/16, 1/2 drill in H.S. 1/4 shank & Wood Block 10 304B 60.08 5/16 1.90 2.25
Carbide Tipped Masonry 3/8 2.10 2.45
*5/8 by 6" O.A.L.
Carbide Tipped Standard "A" Drills

Taper Shank
List No. CT884
Use in rotary hammer drills with "A" taper chucks or adapters.
Price Each Price Each
Size 4-1/2" OAL 6" OAL 9" OAL 12" OAL Size 6" OAL 9" OAL 12" OAL
3/16 7.82* 8.10 –– –– 1/2 13.06 15.12 19.80
1/4 8.82** 9.18 –– 14.32 9/16 — 16.08 —
5/16 9.24 10.14 –– –– 5/8 15.54 20.26 26.10
3/8 9.68 11.26 12.38 16.02 3/4 19.80 24.76 31.06
7/16 10.80 12.78 –– –– 7/8 –– 34.98 —
* 3/16 – 3-5/8" OAL ** 1/4 – 4" OAL
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