Best Spotting Drill Bits AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (brand): KEO
KEO Cutters is a long-standing US specialist in spotting drills and countersinks.
Not for: Users chamfering countersunk screw holes, which need countersinks of the right included angle instead.
AI picks by need
For carbide for CNC production
OSG (brand)
OSG makes carbide NC spot drills that suit high-speed CNC work.
Not for: Manual mill users without rigid setups.
What the AI looks for in Spotting Drill Bits
- Point angle
- Spot angle should be equal to or greater than the drill point (for example 120° or 142° for a 118° or 135° drill); 90° also chamfers A spot narrower than the drill point makes the drill corners hit first and chip.
- Diameter
- Spot drill diameter should be larger than the hole This allows a spot plus chamfer in one pass.
- Rigidity
- Use stub-length spot drills The short body resists deflection, so holes start exactly on location.
Brands that matter
- KEO: Spotting drill and countersink specialist.
- OSG: Carbide NC spot drills.
- Guhring: Spotting and center drills.
What to avoid
- Using center drills when you meant to spot for drilling
Questions
Spot drill vs center drill?
Center drills make lathe center holes; spot drills start holes for drilling.