100SE 29 PC Drill Bit Set

DRILLCO 100SE 29-Piece HSS Drill Bit Set — General Purpose Drilling from 1/16" to 1/2"

The DRILLCO 100SE 29-piece drill bit set is a general purpose high speed steel (HSS) jobber-length set covering 1/16" to 1/2" by 64ths, designed for drilling in low to medium tensile strength materials under a wide range of conditions. Each bit features a 118° conventional point for rapid penetration and a black oxide surface treatment that reduces friction, prevents chip welding, improves chip flow, and increases abrasion resistance. The set is manufactured in the United States and is suited for contractors and trades professionals who need a reliable, broad-range drill set for everyday drilling tasks. Speed, feed, and lubrication are all critical to cutting tool performance with this series.

Technical Specifications

Available Items

The 100SE series distinguishes itself from bright-finish or uncoated alternatives through its black oxide surface treatment, which actively reduces friction and heat damage, prevents chip welding, and extends tool life compared to uncoated HSS bits. The 118° conventional point is optimized for mild steels and free-machining materials, making this set a practical, cost-effective choice for general purpose work rather than a specialty or single-material application.

Key Features & Benefits

General Purpose HSS Construction

High speed steel is the most commonly used tool material for general purpose drilling, suitable for low to medium strength steels, aluminum and other non-ferrous materials, as well as wood and plastic. This makes the 100SE set a versatile option that covers the majority of everyday drilling tasks a contractor encounters on the job.

Black Oxide Surface Treatment

The black oxide treatment reduces friction and heat damage, prevents chip welding, improves chip flow, and increases abrasion resistance. These combined effects extend tool life compared to uncoated bits, particularly when drilling low to medium tensile strength materials.

118° Conventional Point

The 118° conventional point is designed for rapid penetration into mild steels and free-machining materials. This geometry is the standard for general purpose drilling and delivers consistent, reliable entry without requiring a center punch on flat surfaces.

Jobber Length

Jobber length is the most common drill length because it provides extra reach while remaining usable in the vast majority of applications. This makes the 100SE set practical for use across a wide variety of drilling setups without requiring specialty extensions.

29-Piece Size Range (1/16" to 1/2" by 64ths)

The set covers every 64th-inch increment from 1/16" to 1/2", giving contractors a complete range of sizes in a single kit. This eliminates the need to source individual bits for common hole sizes encountered in general construction and fabrication work.

Made in the United States

The 100SE29 set is manufactured in the United States, which can be a requirement for certain government, commercial, or Buy American-compliant projects. Domestic manufacture also supports consistent quality control across the set.

Common Applications

General Purpose Drilling

The 100SE series is designed for general purpose drilling under a wide range of conditions, making it appropriate for everyday hole-making tasks across construction and trades work.

Low to Medium Tensile Strength Materials

These bits are specifically engineered for low to medium tensile strength materials, including mild steels and free-machining metals where the 118° conventional point and black oxide treatment perform optimally.

Non-Ferrous Metals, Wood, and Plastic

As a general purpose HSS set, the 100SE bits are suitable for drilling aluminum and other non-ferrous materials, as well as wood and plastic, covering the broad range of substrates encountered in general contracting.

Product Documents

• Safety Data Sheet (SDS)
• Drillco Product Linecard

Safety Data Summary

Hazard Information

• During normal operation and usage, high speed steel products do not present inhalation, ingestion, or other chemical hazards.
• Operations such as grinding, cutting, machining, burning, and welding may release dusts, fumes, or vapors that may 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; various forms of dermatitis, inflammation and/or ulceration of the upper respiratory tract, and possibly cancer of nasal passages and lungs are associated with chromium exposure.
• Tungsten (5–10% by weight): some evidence of pulmonary involvement such as cough.
• Vanadium (0–5% by weight): eye and respiratory tract irritant.
• Molybdenum (5–10% by weight): eye and mucous membrane irritant; individuals with kidney, chronic respiratory, or liver disease may be at increased risk.
• Dust from grinding may cause irritation of the nose and throat and has the potential for causing transient or permanent respiratory disease including occupational asthma and interstitial fibrosis.
• Skin contact with dust can cause irritation or allergic skin rash due to cobalt sensitization.
• NFPA Hazard Rating: Health 1; Flammability 0; Reactivity 0.
• Fine metal particles produced when ground or sawed can burn; high concentrations in air may present an explosion hazard.

Personal Protective Equipment

• Wear safety glasses or goggles with side shields; contact lenses should not be worn 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 might be required.
• Always use machine guards and wear safety glasses and 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

• All grinding, cutting, machining, burning, and welding operations should be performed in well-ventilated areas; use local exhaust ventilation adequate to limit personal exposure to airborne dust below PEL or TLV levels.
• Clean up using methods to avoid dust generation such as vacuum (with appropriate filters), wet dust mop, or wet clean-up.
• Wash hands thoroughly after handling and before eating or smoking; wash exposed skin at the end of the work shift.
• Do not shake clothing, rags, or other items to remove dust; remove dust by washing or vacuuming with appropriate filters.
• Soiled clothing should be laundered separately.
• Store in a dry place; store in a manner that prevents accidental environmental contamination from traces of industrial lubricants or wetting oils.
• Incompatible materials: strong acids, strong oxidizers.
• If symptoms of pulmonary involvement develop (coughing, wheezing, shortness of breath), remove from exposure and seek medical attention.
• If eye irritation occurs, flush with copious amounts of water; if irritation persists, seek medical attention.
• If skin irritation or rash occurs, thoroughly wash affected areas with soap and water; if irritation persists, seek medical attention.

Frequently Asked Questions

Q: What materials are these drill bits designed to work on?
A: The 100SE series is designed for low to medium tensile strength materials and general purpose drilling. As a general purpose HSS set, they are also suitable for aluminum and other non-ferrous materials, as well as wood and plastic.

Q: What sizes are included in the 100SE29 set?
A: The set includes 29 pieces covering 1/16" to 1/2" by 64ths, providing every 64th-inch increment across that range.

Q: What point angle do these bits use, and why does it matter?
A: These bits feature a 118° conventional point, which is designed for rapid penetration into mild steels and free-machining materials and is the standard geometry for general purpose drilling applications.

Q: What does the black oxide surface treatment do?
A: The black oxide surface treatment reduces friction and heat damage, prevents chip welding, improves chip flow, and increases abrasion resistance, all of which contribute to longer tool life compared to uncoated bits.

Q: What length type are these drill bits?
A: These are jobber length bits, which is the most common length because it provides extra reach and can be used in most applications.

Q: Where are these drill bits manufactured?
A: The DRILLCO 100SE29 set is manufactured in the United States.