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Diablo Forstner Bit Set for Wood
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Diablo Forstner Bit Set for Wood
Diablo's Forstner bit sets cover the common sizes in forged high-speed steel with a hardened body. The bits bore straight, angled and overlapping flat-bottom holes in wood, and the double-ground serrated edges cut with less splintering and chipping. Use them in drill presses and handheld drills.
Three sets. The 4-piece holds the 1/4 in., 1/2 in., 3/4 in. and 1 in. bits. The 7-piece holds the seven smallest sizes, 1/4 in. to 1 in. in eighth-inch steps from 1/4 in. up to 1 in. The 16-piece holds every size Diablo makes, 1/4 in. to 2-1/8 in.
3/8 in. chuck minimum. Diablo lists a minimum chuck size of 3/8 in. for every set, including the sets with the 1/4 in. bit.
Features and Common Uses
- Forged high-speed steel with a hardened body for a longer life and a sharper edge
- Ultra-sharp spur resists walking on the material
- Steep-angled, double-ground serrated edges for less splintering and chipping
- Smooth, flat-bottom holes, with chips that curl off for fast, clean removal
- For drill presses and handheld drills, 3/8 in. minimum chuck
Commonly used for:
- Flat-bottom holes in solid wood and plywood
- Pocket holes and overlapping holes
- A full range of sizes for cabinet and furniture work
Specifications
| Set | Model | Pieces | Sizes | Minimum chuck |
|---|---|---|---|---|
| 4-Piece | FB-104 | 4 | 1/4, 1/2, 3/4 and 1 in. | 3/8 in. |
| 7-Piece | FB-107 | 7 | 1/4, 3/8, 1/2, 5/8, 3/4, 7/8 and 1 in. | 3/8 in. |
| 16-Piece | FB-100 | 16 | All 16 sizes, 1/4 in. to 2-1/8 in. | 3/8 in. |
Set contents and chuck size are from Diablo's product pages, one page per set. For recommended speeds by bit size, see the Diablo Forstner bit speed chart. Source: Diablo Forstner bit set product pages (diablotools.com).
Speeds by bit size: Source: Diablo Forstner bit speed chart (PDF).
Frequently Asked Questions
Which set should I buy?
The 4-piece covers the common 1/4 in., 1/2 in., 3/4 in. and 1 in. holes. The 7-piece fills in the eighths up to 1 in. The 16-piece adds everything to 2-1/8 in.
Can I buy one bit instead?
Yes. Every size is sold individually on the Forstner bit page, from 1/4 in. to 2-1/8 in.
What chuck size do I need?
Diablo lists a 3/8 in. minimum chuck for all three sets.
What speed should I run them at?
It depends on the bit size and the wood. Diablo's speed chart, linked under Specifications, gives a range for each size in softwood and hardwood.