Item No.: TD1009
Cutting diameter (mm): 13-23
Cutting length (mm): 63-155
Total length (mm): 144-253
Material: High-speed steel 6542
Category: Rolled taper shank twist drill
Process: Rolling
Surface color: Nitrided, Polished, Black and white
Product Overview
Maximize efficiency in your heavy-duty drilling operations with our industrial series of Rolled Taper Shank Twist Drill Bits. Manufactured from high-grade HSS 6542 (M2 equivalent High-Speed Steel), these bits are designed to deliver reliable performance, high wear resistance, and excellent "red hardness" for demanding metalworking environments.
The roll-forging process used to create these drills preserves the inherent grain structure of the steel, offering superior toughness and resistance to snapping compared to standard ground drills in heavy-feed applications. Featuring a standard Morse Taper (MT) shank, these bits ensure a rigid, zero-slip connection in lathe tailstocks, radial arm drills, and magnetic drilling machines, allowing for maximum torque transfer.
Available in a comprehensive metric range from 13mm to 23mm diameter, these drills are the workhorse solution for fabricators and machine shops requiring reliable hole-making in mild steel, cast iron, aluminum, and various alloys.
Key Features & Benefits
● High-Speed Steel 6542 Construction: Utilizes premium M2-grade HSS for an optimal balance of hardness, toughness, and heat resistance during continuous drilling.
● Roll-Forged Process: The rolling manufacturing technique enhances the structural integrity of the bit, providing excellent durability for general-purpose industrial use.
● Secure Morse Taper Shank: The precision tapered shank locks firmly into machine spindles (e.g., MT2, MT3 based on size), preventing slippage under high-torque loads.
● Optimized for Chip Evacuation: The standard helical flute design efficiently clears heavy chips from deep holes, reducing heat buildup.
● Versatile Surface Finishes:
● Nitrided (Black): Increases surface hardness and lubricant retention (as seen in the product image).
● Polished (Bright): For clean cutting in softer materials.
● Black & White: A dual finish combining groove capability with land wear resistance.
Ideal Applications
● Heavy-duty fabrication shops.
● Industrial maintenance and repair.
● Machining steel plates, I-beams, and castings.
● Drilling operations on lathes and radial arm drills.
| Size (D) | Flute Length (I) | Overall Length (L) | Shank No. (M.T.No) | Size (D) | Flute Length (I) | Overall Length (L) | Shank No. (M.T.No) |
| 6.5 | 63 | 144 | MT1 | 24 | 160 | 281 | MT3 |
| 7 | 69 | 150 | MT1 | 24.5 | 160 | 281 | MT3 |
| 7.5 | 69 | 150 | MT1 | 25 | 160 | 281 | MT3 |
| 8 | 75 | 156 | MT1 | 25.5 | 165 | 286 | MT3 |
| 8.5 | 75 | 156 | MT1 | 26 | 165 | 286 | MT3 |
| 9 | 81 | 162 | MT1 | 27 | 170 | 291 | MT3 |
| 9.5 | 81 | 162 | MT1 | 28 | 170 | 291 | MT3 |
| 10 | 87 | 168 | MT1 | 29 | 175 | 296 | MT3 |
| 10.5 | 87 | 168 | MT1 | 30 | 175 | 296 | MT3 |
| 11 | 94 | 175 | MT1 | 31 | 180 | 301 | MT3 |
| 11.5 | 94 | 175 | MT1 | 32 | 185 | 334 | MT4 |
| 12 | 101 | 182 | MT1 | 33 | 185 | 334 | MT4 |
| 12.5 | 101 | 182 | MT1 | 34 | 190 | 339 | MT4 |
| 13 | 101 | 182 | MT1 | 35 | 190 | 339 | MT4 |
| 13.5 | 108 | 189 | MT1 | 36 | 195 | 344 | MT4 |
| 14 | 108 | 189 | MT1 | 37 | 195 | 344 | MT4 |
| 14.5 | 114 | 212 | MT2 | 38 | 200 | 349 | MT4 |
| 15 | 114 | 212 | MT2 | 39 | 200 | 349 | MT4 |
| 15.5 | 120 | 218 | MT2 | 40 | 200 | 349 | MT4 |
| 16 | 120 | 218 | MT2 | 42 | 205 | 354 | MT4 |
| 16.5 | 125 | 223 | MT2 | 45 | 210 | 359 | MT4 |
| 17 | 125 | 223 | MT2 | 48 | 220 | 369 | MT4 |
| 17.5 | 130 | 228 | MT2 | 50 | 220 | 369 | MT4 |
| 18 | 130 | 228 | MT2 | 55 | 230 | 417 | MT5 |
| 18.5 | 135 | 233 | MT2 | 60 | 235 | 422 | MT5 |
| 19 | 135 | 233 | MT2 | 65 | 245 | 432 | MT5 |
| 19.5 | 140 | 238 | MT2 | 70 | 250 | 437 | MT5 |
| 20 | 140 | 238 | MT2 | 72 | 255 | 442 | MT5 |
| 20.5 | 145 | 243 | MT2 | 75 | 255 | 442 | MT5 |
| 21 | 145 | 243 | MT2 | 80 | 260 | 514 | MT6 |
| 21.5 | 150 | 248 | MT2 | 85 | 265 | 519 | MT6 |
| 22 | 150 | 248 | MT2 | 90 | 270 | 524 | MT6 |
| 22.5 | 155 | 253 | MT2 | 95 | 275 | 529 | MT6 |
| 23 | 155 | 253 | MT2 | 100 | 280 | 534 | MT6 |
| 23.5 | 155 | 276 | MT3 |
FEATURED PRODUCTS