Addison Taper Shank Core Drills

High Speed Steel

TAPER SHANK CORE DRILLS

Specification conform
to IS 5366-1978

Dimensions in mm

                  tapershankcoredrills

Core drills are designed to enlarge previously drilled, cored, or punched holes 75% of the tool diameter. They have a 30° relieved chamfer nose suitable for drilling rough cores. Three and four flute core drills have better hole size than two flute drills and produce a very good surface finish (although not to the standard produced by a reamer.) Note: Core drills cannot drill an original hole.

Diameter h8

Range of Diameters

Flute Length

 Overall

 

 

length

 Morse Taper No.

Over

Up to and including
7.00 6.90 7.50 69 150 1
8.00 7.50 8.50 75 156 1
9.00 8.50 9.50 81 162 1
10.00 9.50 10.60 87 168 1
11.00 10.60 11.80 94 175 1
12.00 13.00 11.80 13.20 101 182 1
14.00 13.20 14.00 108 189 1
15.00 14.00 15.00 114 212 2
16.00 15.00 16.00 120 218 2
17.00 16.00 17.00 125 223 2
18.00 17.00 18.00 130 228 2
19.00 18.00 19.00 135 233 2
20.00 19.00 20.00 140 238 2
21.00 20.00 21.20 145 243 2
22.00 21.20 22.40 150 248 2
23.00 22.40 23.02 155 253 2
24.00 23.02 23.60 155 276 3
25.00 23.60 25.00 160 281 3
26.00 25.00 26.50 165 286 3
27.00 28.00 26.50 28.00 170 291 3
29.00 30.00 28.00 30.00 175 296 3
31.00 30.00 31.50 180 301 3
- 31.50 31.75 185 306 3
32.00 33.00 31.75 33.50 185 334 4
34.00 35.00 33.50 35.50 190 339 4
36.00 37.00 35.50 37.50 195 344 4
38.00 39.00 40.00 37.50 40.00 200 349 4
41.00 42.00 40.00 42.50 205 354 4

Diameter h8

Range of Diameters

Flute Length

 Overall Length Morse Taper No.

Over

Up to and including
43.00 44.00 45.00 42.50 45.00 210 359 4
46.00 47.00 45.00 47.50 215 364 4
48.00 49.00 50.00 47.50 50.00 220 369 4
51.00 52.00 53.00 50.80 53.00 225 412 5
54.00 55.00 56.00 53.00 56.00 230 417 5
57.00 58.00 59.00 60.00 56.00 60.00 235 422 5
61.00 62.00 63.00 60.00 63.00 240 427 5
64.00 65.00 66.00 67.00 63.00 67.00 245 432 5
68.00 69.00 70.00 71.00 67.00 71.00 250 437 5
72.00 73.00 74.00 75.00 71.00 75.00 255 442 5
76.00 75.00 76.20 260 447 5
77.00 78.00 79.00 80.00 76.20 80.00 260 514 6

Please contact us for manufacturing non standard size core drills. We also manufacture extra long and specific 3/4 flutes core drills and core drills in HSS M2, or with 5% or 8% cobalt.

Go to our download page for complete price list of Addison cutting tools in Indian rupees

 

Core Drills

Addison

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