380A Screw Machine Length Drill – Pack of 96

DRILLCO 380 Screw Machine Drill — Heavy-Duty Stub Length Drilling with 135° Split Point

The DRILLCO 380 Series Screw Machine Drill is a heavy-duty, stub-length (screw machine length) High Speed Steel drill designed for contractors and trades professionals requiring greater rigidity and stability than standard jobber-length drills. The shortened flute length reduces deflection and breakage, making it well suited for drilling holes in low and medium strength materials as well as sheet metal. The 135° split point eliminates walking at the point, enabling accurate hole placement without a center punch. Speed, feed, and lubrication are all critical to cutting tool performance with this series.

Technical Specifications

Available Sizes

The screw machine (stub) length design provides greater rigidity and stability compared to jobber-length drills, reducing deflection and the risk of breakage in demanding applications. The heavy-duty construction is engineered to increase both tool life and performance, while the 135° split point differentiates this series from standard 118° conventional-point drills by eliminating the need for a center punch and reducing walking on curved or hard surfaces.

Key Features & Benefits

Screw Machine (Stub) Length

The shortened flute length provides greater stability and rigidity than longer drill formats. This reduces deflection during drilling, which is especially valuable in tight or confined workspaces where control is critical.

135° Split Point

The 135° split point is self-centering and reduces walking at the point of entry. This allows contractors to start holes accurately without a center punch, saving time and improving hole placement precision.

Heavy-Duty Design

The heavy-duty construction is specifically engineered to increase tool life and performance under demanding conditions. This translates to fewer tool changes and lower cost-per-hole on the job site.

High Speed Steel (HSS) Construction

HSS is the most commonly used tool material for general purpose drilling and is suitable for low to medium strength steels, aluminum, and other non-ferrous materials. It provides a reliable balance of hardness and toughness for everyday drilling tasks.

Wide Size Range

Available in wire gauge sizes #1 through #60, the 380 Series covers a broad range of hole sizes to meet varied project requirements without switching drill families.

Common Applications

Drilling in Low and Medium Strength Materials

The 380 Series is designed for drilling holes in low and medium strength materials, making it a go-to choice for general metalworking tasks on the job site.

Heavy-Duty Drilling

The heavy-duty design supports demanding drilling operations where tool life and consistent performance are priorities.

Sheet Metal Drilling

The 135° split point and stub length make this drill well suited for sheet metal work, where accuracy and reduced walking are essential to clean, precise holes.

Confined or Tight-Space Drilling

The shorter screw machine length provides better access and control in confined spaces where a standard jobber-length drill would be difficult to maneuver or prone to deflection.

Product Documents

• Safety Data Sheet (SDS) — DRILLCO High Speed Steel Cutting Tools
• DRILLCO / WALTER Product Linecard

Safety Data Summary

Hazard Information

• During normal operation, high speed steel products do not present inhalation, ingestion, or other chemical hazards.
• Grinding, cutting, machining, burning, or welding 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: listed as a carcinogen by NTP and OSHA; associated with dermatitis, inflammation and/or ulceration of the upper respiratory tract, and possibly cancer of nasal passages and lungs.
• Tungsten: some evidence of pulmonary involvement such as cough.
• Vanadium: eye and respiratory tract irritant.
• Cobalt dust (from grinding) is reported as the 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 may cause irritation.
• 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

• Protective gloves: cloth or leather gloves recommended when contact with dust or mist is likely.
• Eye protection: safety glasses or goggles with side shields; contact lenses should not be worn. An eye wash station should be available in the immediate work area.
• Hearing protection may be required.
• Always use machine guards and wear safety glasses and protective clothing to prevent injury in the event of tool breakage.
• Respiratory protection: use an appropriate NIOSH-approved respirator if airborne dust concentration exceeds the applicable PEL or TLV, per 29 CFR 1910.134.

Safe Handling

• Use only with local exhaust ventilation adequate to limit personal exposure to airborne dust below PEL or TLV levels.
• Clean up using methods that avoid dust generation: vacuum with appropriate filters, wet dust mop, or wet clean-up.
• Store in a dry place; store in a manner that prevents accidental environmental contamination from traces of industrial lubricants or wetting oils.
• 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.
• Soiled clothing should be laundered separately.
• Incompatible materials: strong acids, strong oxidizers.
• Emergency phone: CHEM-TEL INC 1-800-255-3924.

Frequently Asked Questions

Q: What materials is the DRILLCO 380 Screw Machine Drill designed to drill?
A: The 380 Series is designed for drilling holes in low and medium strength materials and sheet metal. It is a High Speed Steel (HSS) tool, which is suitable for general purpose drilling in these material categories.

Q: What is the advantage of the screw machine (stub) length over a standard jobber-length drill?
A: Screw machine length drills are shorter than jobber-length drills, which provides greater stability, reduces deflection, and mitigates breakage. They are also better suited for drilling in tighter, more confined spaces.

Q: What does the 135° split point do, and why does it matter?
A: The 135° split point reduces walking at the point of entry, allowing the drill to self-center without requiring a center punch. This improves hole placement accuracy, particularly on curved surfaces or when hand-drilling.

Q: What size range is available in the 380 Series?
A: The 380 Series is available in wire gauge sizes #1 through #60, with individual item numbers 380A001 through 380A060.

Q: Are speed, feed, and lubrication important when using these drills?
A: Yes. DRILLCO specifically notes that speed, feed, and lube are all critical to cutting tool performance with this series. Proper technique in these areas will directly affect tool life and hole quality.

Q: Where are the DRILLCO 380 Screw Machine Drills manufactured?
A: The 380 Series is manufactured in the United States.