GY-HSL HSS Tapper Long Shank

As per IS: 8305

The Long Series Taper Shank Drill is the go-to solution for professionals in fabrication, automotive, and heavy engineering. Featuring an extended flute length, it allows for deep penetration without compromising on hole accuracy or tool stability. Each drill is crafted from premium High-Speed Steel (HSS) and manufactured in strict accordance with IS 8305-1976 and DIN 341 standards.

Key Features

  • Deep-Hole Precision: Extended flute design optimized for clearing chips effectively during deep-bore operations.
  • Premium HSS Construction: Built from high-quality steel that maintains hardness at high temperatures, ensuring a longer tool life.
  • Advanced Heat Treatment: Utilizes state-of-the-art heat treatment technology for consistent toughness and wear resistance across the entire batch.
  • CNC Ground Geometry: Produced on high-precision CNC machines to ensure accurate point angles and concentricity for “right-first-time” drilling.
  • Standardized Fitting: Designed to fit American Standard (Morse) tapered holders, ranging from MT1 to MT5.
  • 118° Point Angle: A versatile geometry that provides an ideal balance of cutting speed and durability across various materials.
Technical Specifications
  • Standards: IS 8305-1976 / DIN 341
  • Shank Type: Taper Shank (Morse Taper MT1 to MT5)
  • Material: High-Speed Steel (HSS)
  • Point Angle: 118 Degree
TECHNICAL SPECIFICATION FOR COARSE PITCH
Size-Diameter (mm) Size-Diameter (inch) Length: Flute (mm) Length: Overall (mm)
MT1
5.00 74 155
5.16 13/64 74 155
5.20 74 155
5.50 80 161
5.56 7/32 80 161
5.80 80 161
5.95 15/64 80 161
6.00 80 161
6.20 86 167
6.35 1-4 86 167
6.50 86 167
6.75 17/64 93 174
6.80 93 174
7.00 93 174
7.14 9/32 93 174
7.20 93 174
7.50 93 174
7.54 19/64 100 181
7.80 100 181
7.94 5/16 100 181
8.00 100 181
8.20 100 181
8.33 21/64 100 181
8.50 100 181
8.73 11/32 107 188
8.80 107 188
9.00 107 188
9.13 23/64 107 188
9.20 107 188
9.50 107 188
9.52 3-8 116 197
9.80 116 197
9.92 25/64 116 197
10.00 116 197
10.20 116 197
10.32 13/32 116 197
10.50 116 197
10.72 27/64 125 206
10.80 125 206
11.00 125 206
11.11 7/16 125 206
11.20 125 206
11.50 125 206
11.51 29/64 125 206
11.80 125 206
11.91 15/32 134 215
12.00 134 215
12.20 134 215
12.30 31/64 134 215
12.50 134 215
12.70 1-2 134 215
12.80 134 215
13.00 134 215
13.10 33/64 134 215
13.20 134 215
13.49 17/32 142 223
13.50 142 223
13.80 142 223
13.89 35/64 142 223
14.00 142 223
TECHNICAL SPECIFICATION FOR COARSE PITCH
Size-Diameter (mm) Size-Diameter (inch) Length: Flute (mm) Length: Overall (mm)
MT2
14.25 147 245
14.29 9/16 147 245
14.50 147 245
14.68 37/64 147 245
14.75 147 245
15.00 147 245
15.08 19/32 153 251
15.25 153 251
15.48 39/64 153 251
15.50 153 251
15.75 153 251
15.87 5/8 153 251
16.00 153 251
16.25 159 257
16.27 41/64 159 257
16.50 159 257
16.67 21/32 159 257
16.75 159 257
17.00 159 257
17.07 43/64 165 263
17.25 165 263
17.46 11/16 165 263
17.50 165 263
17.75 165 263
17.86 45/64 165 263
18.00 165 263
18.25 171 269
18.26 23/32 171 269
18.50 171 269
18.65 47/64 171 269
18.75 171 269
19.00 171 269
19.05 3/4 177 275
19.25 177 275
19.45 49/64 177 275
19.50 177 275
19.75 177 275
19.84 25/32 177 275
20.00 177 275
20.24 51/64 184 282
20.25 184 282
20.50 184 282
20.64 13/16 184 282
20.75 184 282
21.00 184 282
21.03 53/64 184 282
21.25 191 289
21.43 27/32 191 289
21.50 191 289
21.75 191 289
21.83 55/64 191 289
22.00 191 289
22.22 7/8 191 289
22.25 191 289
22.50 198 296
22.62 57/64 198 296
22.75 198 296
23.00 198 296
23.02 29/32 198 296
TECHNICAL SPECIFICATION FOR COARSE PITCH
Size-Diameter (mm) Size-Diameter (inch) Length: Flute (mm) Length: Overall (mm)
MT3
23.25 198 319
23.42 59/64 198 319
23.50 198 319
23.75 206 327
23.81 15/16 206 327
24.00 206 327
24.21 61/64 206 327
24.25 206 327
24.50 206 327
24.61 31/32 206 327
24.75 206 327
25.00 63/64 206 327