400F 29 PC Drill Bit Set

DRILLCO 400F 29-Piece HSS Drill Bit Set — Heavy-Duty Performance from 1/16" to 1/2"

The DRILLCO 400F is a 29-piece jobber-length High Speed Steel drill bit set covering 1/16" to 1/2" by 64ths, designed for heavy-duty drilling in medium and high strength materials. Each bit features a 140° split point for self-centering starts and reduced thrust requirements, making the set well-suited for use with handheld power tools on demanding jobsite applications. A black oxide surface treatment reduces friction and heat buildup to extend tool life. The 3-flats shank design minimizes slippage in drill chucks, providing a more secure grip during operation.

Technical Specifications

Available Sizes

Unlike general-purpose sets built around conventional 118° points, the 400F set uses a 140° split point geometry that self-centers on contact, eliminating the need for a center punch on most surfaces and reducing walking on curved or angled workpieces. The 3-flats shank and black oxide treatment together address two of the most common failure points in heavy-duty drilling — chuck slippage and premature heat damage — making this set a more capable choice for demanding ferrous material applications.

Key Features & Benefits

140° Self-Centering Split Point

The 140° split point geometry reduces thrust requirements compared to conventional point angles, allowing the bit to start cutting immediately on contact without walking. This is especially valuable when drilling on curved surfaces or working with handheld tools where precise positioning is critical.

General Purpose HSS Construction

High Speed Steel is the most widely used tool material for general purpose drilling, offering reliable performance across medium and high strength materials. The HSS composition provides the toughness needed for heavy-duty applications while remaining compatible with standard drill chucks and handheld power tools.

Black Oxide Surface Treatment

The black oxide finish reduces friction between the bit and workpiece, limiting heat buildup during extended drilling operations. Reduced heat damage translates directly to longer tool life and fewer bit replacements on the job.

3-Flats Shank

The three-flat shank design provides a more secure seating in drill chucks, significantly reducing the risk of slippage under load. For contractors running high-torque handheld drills, this means more consistent cutting performance and less downtime from bit repositioning.

Jobber Length

Jobber length is the industry standard for general-purpose drilling because it balances reach with rigidity across the widest range of applications. This length is suitable for the majority of drilling tasks encountered in construction and metalworking environments.

29-Piece Incremental Set (1/16" to 1/2" by 64ths)

The full 29-piece range covering every 64th-inch increment from 1/16" to 1/2" ensures contractors have the right size on hand without carrying multiple sets. A single organized set reduces setup time and eliminates the need to source individual bits for common hole sizes.

Common Applications

Drilling in Medium and High Strength Materials

The 140° split point and HSS construction make this set suitable for drilling into medium and high strength ferrous materials where conventional bits may struggle or walk off target.

Heavy-Duty Drilling

Built for more demanding applications, the 400F set is designed to handle the increased thrust and heat generated during heavy-duty drilling operations on tough materials.

Handheld Power Tool Use

The 3-flats shank and self-centering split point are specifically advantageous when using handheld power drills, where chuck grip security and accurate starting are harder to control than on stationary equipment.

Stainless Steel and Tougher Ferrous Materials

The set is designed for efficient drilling in stainless steel and tougher ferrous materials, where the reduced thrust of the split point and the durability of HSS provide a meaningful performance advantage.

Product Documents

• Safety Data Sheet (SDS)
• Drillco Product Linecard

Safety Data Summary

Hazard Information

• During normal operation, HSS drill bits do not present inhalation, ingestion, or other chemical hazards.
• Grinding, cutting, machining, burning, or welding these products may release dusts, fumes, or vapors that present health hazards if exposure limits are exceeded.
• Excessive inhalation of metallic fumes and dusts may cause irritation of eyes, nose, and throat; symptoms may include metallic taste, dryness and irritation of the throat, chills, and fever persisting 12 to 48 hours.
• Chromium (present 0–5% by weight) is listed as a carcinogen by NTP and OSHA; associated with dermatitis, upper respiratory tract inflammation/ulceration, and possible nasal/lung cancer risk.
• Tungsten (5–10% by weight): some evidence of pulmonary involvement such as cough.
• Vanadium (0–5% by weight): eye and respiratory tract irritant.
• Cobalt dust (not listed as a separate ingredient but referenced in SDS): most probable cause of respiratory diseases including occupational asthma and interstitial fibrosis.
• Skin contact with dust can cause irritation or allergic skin rash due to cobalt sensitization.
• Eye contact with dust may cause irritation.
• Fine metal particles produced during grinding can burn; high concentrations in air may present an explosion hazard.
• NFPA Hazard Rating: Health 1; Flammability 0; Reactivity 0.

Personal Protective Equipment

• Wear safety glasses or goggles with side shields; do not wear contact lenses when handling these materials.
• Cloth or leather gloves are recommended when contact with dust or mist is likely.
• Use an appropriate NIOSH-approved respirator if airborne dust concentration exceeds the applicable PEL or TLV.
• Hearing protection may be required.
• Always use machine guards and wear protective clothing to prevent injury in the event of tool breakage.
• Employer should provide an eye wash station within the immediate work area for emergency use.

Safe Handling

• Use only with local exhaust ventilation adequate to limit personal exposure to airborne dust below PEL or TLV levels.
• Wash hands thoroughly after handling and before eating or smoking; wash exposed skin at end of work shift.
• Do not shake clothing, rags, or other items to remove dust — remove dust by washing or vacuuming with appropriate filters.
• Clean up spills using methods that avoid dust generation: vacuum with appropriate filters, wet dust mop, or wet clean-up.
• Store in a dry place in a manner that prevents accidental environmental contamination from traces of industrial lubricants or wetting oils.
• Soiled clothing should be laundered separately.
• Incompatible materials: strong acids, strong oxidizers.
• For powder fires: smother with dry sand, dry dolomite, ABC-type fire extinguisher, or flood with water.
• Do not release runoff from fire control methods to swales or waterways.

Frequently Asked Questions

Q: What materials is the 400F set designed to drill?
A: The 400F is designed for drilling holes in medium and high strength materials, including stainless steel and tougher ferrous materials. It is built for heavy-duty drilling applications.

Q: What point angle do these bits use, and why does it matter?
A: These bits use a 140° split point. This geometry is self-centering, which reduces the thrust required to start a hole and minimizes walking — particularly useful when drilling on curved surfaces or using handheld power tools.

Q: Will these bits work with standard drill chucks on handheld power tools?
A: Yes. The bits feature a 3-flats shank specifically designed to reduce slippage in drill chucks, and the set is listed as suitable for drilling with handheld power tools.

Q: What sizes are included in the set?
A: The 400F29 set includes 29 pieces covering 1/16" to 1/2" by 64ths, providing every 64th-inch increment across that range.

Q: What surface treatment do these bits have, and what does it do?
A: The bits have a black oxide surface treatment, which reduces friction and heat damage during drilling and increases tool life. According to Drillco's linecard, black oxide is suited for low to medium tensile strength materials, while the 400F's heavy-duty design extends its use to medium and high strength materials.

Q: Are there any critical operating tips for getting the best performance from these bits?
A: Yes — speed, feed, and lubrication are all critical to cutting tool performance. Proper attention to these three factors will maximize bit life and cutting efficiency.