Sutton D1882540 1" (25.4mm) Reduced Shank Drill Bit - 1/2in Shank, 152mm, HSS
Available
The Sutton D188 imperial reduced shank drill bits are high speed steel (HSS) drills in 30 sizes from 33/64" (13.1 mm) to 1-1/4" (31.75 mm), each with a 1/2" shank, a 152 mm (6") overall length and an 86 mm (3-3/8") flute length. The reduced shank is designed to let drills above 12.5 mm and 1/2" fit 13 mm drill chucks.
The precision ground flute and bright cutting edge with a blue flute are designed to make these drills a better choice for ferrous materials. The 118° standard point is a common point for general purpose applications. Overall and flute lengths do not include the drill point. Use low speed, 350 RPM or less, and secure the workpiece and the drill firmly.
Where this product is used
- Drilling larger holes in a drill with a 13 mm chuck, where a full size shank would not fit.
- Drilling ferrous materials at low speed.
- Applications include DIY, trade, industrial, automotive, metalworking, machine shop and MRO work.
Design features
- Reduced shank (1/2"): designed to fit 13 mm drill chucks on drills above 12.5 mm and 1/2".
- Precision ground flute with a bright cutting edge and blue flute: designed to suit ferrous materials.
- 118° standard point for general purpose applications.
- High speed steel (HSS) construction.
- 152 mm (6") overall length with an 86 mm (3-3/8") flute length.
Sizes and item numbers
Each size is a single drill. Lengths do not include the drill point.
| Diameter (inch) | Diameter (mm) | Overall length (mm) | Flute length (mm) | Shank | Sutton item no. |
|---|---|---|---|---|---|
| 33/64" | 13.1 | 152 | 86 | 1/2" | D188 1310 |
| 17/32" | 13.49 | 152 | 86 | 1/2" | D188 1349 |
| 35/64" | 13.89 | 152 | 86 | 1/2" | D188 1389 |
| 9/16" | 14.29 | 152 | 86 | 1/2" | D188 1429 |
| 37/64" | 14.68 | 152 | 86 | 1/2" | D188 1468 |
| 19/32" | 15.08 | 152 | 86 | 1/2" | D188 1508 |
| 39/64" | 15.48 | 152 | 86 | 1/2" | D188 1548 |
| 5/8" | 15.87 | 152 | 86 | 1/2" | D188 1588 |
| 41/64" | 16.27 | 152 | 86 | 1/2" | D188 1627 |
| 21/32" | 16.67 | 152 | 86 | 1/2" | D188 1667 |
| 43/64" | 17.06 | 152 | 86 | 1/2" | D188 1707 |
| 11/16" | 17.46 | 152 | 86 | 1/2" | D188 1746 |
| 45/64" | 17.86 | 152 | 86 | 1/2" | D188 1786 |
| 23/32" | 18.26 | 152 | 86 | 1/2" | D188 1826 |
| 47/64" | 18.65 | 152 | 86 | 1/2" | D188 1865 |
| 3/4" | 19.05 | 152 | 86 | 1/2" | D188 1905 |
| 49/64" | 19.45 | 152 | 86 | 1/2" | D188 1945 |
| 25/32" | 19.84 | 152 | 86 | 1/2" | D188 1984 |
| 51/64" | 20.24 | 152 | 86 | 1/2" | D188 2024 |
| 13/16" | 20.64 | 152 | 86 | 1/2" | D188 2064 |
| 27/32" | 21.43 | 152 | 86 | 1/2" | D188 2143 |
| 7/8" | 22.22 | 152 | 86 | 1/2" | D188 2223 |
| 29/32" | 23.02 | 152 | 86 | 1/2" | D188 2302 |
| 15/16" | 23.81 | 152 | 86 | 1/2" | D188 2381 |
| 31/32" | 24.61 | 152 | 86 | 1/2" | D188 2461 |
| 1" | 25.4 | 152 | 86 | 1/2" | D188 2540 |
| 1-1/16" | 26.99 | 152 | 86 | 1/2" | D188 2699 |
| 1-1/8" | 28.57 | 152 | 86 | 1/2" | D188 2858 |
| 1-3/16" | 30.16 | 152 | 86 | 1/2" | D188 3016 |
| 1-1/4" | 31.75 | 152 | 86 | 1/2" | D188 3175 |
Using the drills
- Fit the drill in a drill chuck that closes on the 1/2" shank and drill at 350 RPM or less.
- Secure the workpiece and hold the drill firmly.
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | D188 |
| Type | Reduced shank drill bit, imperial |
| Sizes | 30 sizes, 33/64" (13.1 mm) to 1-1/4" (31.75 mm) |
| Shank | 1/2" |
| Overall length | 152 mm (6") |
| Flute length | 86 mm (3-3/8") |
| Point | 118° standard point |
| Material | High speed steel (HSS) |
| Finish | Steam oxide (blue) |
Related products
Reduced shank drill sets: D188 RS16 16 piece set (17/32" to 1"), D188 S8R 8 piece set (9/16" to 1") and D188 RS4 4 piece set (5/8" to 1"). Metric drills: D188 metric reduced shank drill bits. Browse all drills and drilling accessories.
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