Micro 100
Micro 100 DR-125-2 1/8" carbide jobber drill bit 118°
Carbide jobber drill bit with 118° point angle for general-purpose drilling in steel and cast iron
- Carbide construction resists wear for longer tool life
- 118-degree conventional point centres accurately in steel and cast iron
- Jobber length gives standard reach for general drilling
- 1/8-inch fractional size matches common tap and clearance charts
- Bright uncoated finish allows easy resharpening when dull
Micro 100 1/8" carbide jobber bit
The Micro 100 DR-125-2 is a solid-carbide jobber-length drill bit with a 1/8 inch diameter and a 118-degree conventional point. Bright uncoated finish suits general-purpose drilling in ferrous and non-ferrous materials where coolant-through is not required. Machinists and maintenance technicians choose it for rigid set-ups that demand the stiffness and wear resistance of carbide over high-speed steel. Decimal equivalent 0.1250 inch matches standard fractional sizing for precise hole-making.
Thermals noise and power in normal use
Carbide construction runs cooler than high-speed steel at equivalent feeds because the substrate conducts heat away from the cutting edges. No moving parts means the bit itself produces no audible noise; sound levels depend entirely on the machine spindle and workpiece fixturing. Power draw at the spindle is determined by the drill press or milling machine, not by the accessory, so the bit adds no extra electrical load beyond the cutting forces generated in the material.
Upgrades from high-speed steel jobber bits
This bit replaces standard high-speed steel jobber drills when tool life, hole accuracy or cutting speed must improve in abrasive or work-hardening alloys. The jump is worth it when a shop runs enough holes that fewer tool changes offset the higher upfront cost of carbide. It does not suit hand-held drilling, deep-hole applications requiring coolant-through, or operations where the rigidity of the set-up cannot prevent carbide chipping. Buyers needing larger diameters, different point angles or coated variants must select other part numbers.
Highlights
- Carbide construction resists wear for longer tool life
- 118-degree conventional point centres accurately in steel and cast iron
- Jobber length gives standard reach for general drilling
- 1/8-inch fractional size matches common tap and clearance charts
- Bright uncoated finish allows easy resharpening when dull
Specifications
| Brand | MICRO 100 |
|---|
Questions about this item
How do I install the 1/8" carbide jobber bit in my drill chuck, and what step is often missed?
Open the chuck fully, insert the shank until it seats, then tighten securely; the step often missed is verifying the bit runs true before drilling.
When will the 118° conventional point need replacement or resharpening?
Replace or resharpen when the cutting edges show visible wear, chipping, or when drilling force increases noticeably in steel or cast iron.
What limit appears first during sustained drilling with this uncoated carbide bit?
Heat buildup at the 118° point is the first limit; without coolant-through capability, temperatures rise quickly in deep holes.
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