350N 29 PC Drill Pal Set

DRILLCO 350N 29-Piece NITRO® HSS Drill Pal Set — Heavy-Duty Mechanics Length Drilling for Medium and High Strength Materials

The DRILLCO 350N 29-Piece NITRO® Drill Pal Set is a mechanics length, NAS Type B high speed steel drill bit set engineered for heavy-duty drilling in medium and high strength materials, including stainless steel. The set covers the full fractional range from 1/16" to 1/2" in 64ths increments, providing contractors and trades professionals with a comprehensive solution for a wide variety of hole-making tasks. The 135° split point geometry and black and gold surface treatment deliver self-centering performance and maximum lubricity, making these drills equally suited for handheld power tools and fixed-spindle CNC operations. The 3-flats shank design reduces slippage in drill chucks, a critical advantage in demanding field and shop environments.

Technical Specifications

Available Items

400N Series — Individual Fractional Jobber Length Drills (Also Available)

SDS Composition & Ingredient Data

The NITRO® 350N mechanics length design offers a shorter, more rigid profile compared to standard jobber length drills, reducing deflection and breakage in confined work areas. The premium M2 HSS construction and black and gold surface treatment provide superior performance over standard bright-finish or black oxide HSS drills, particularly when working with medium and high strength steels and stainless steel. The 3-flats shank is a distinguishing feature of the mechanics length series, providing a more secure grip in drill chucks than a standard round shank.

Key Features & Benefits

Premium M2 High Speed Steel Construction

All NITRO® drills are manufactured from premium quality M2 High Speed Steel, providing the hardness and wear resistance required for heavy-duty drilling in a wide range of material groups, including stainless steel. M2 HSS construction extends tool life compared to standard HSS grades, reducing replacement frequency and downtime on the job.

135° Split Point Geometry

The self-centering 135° split point reduces thrust requirements and minimizes walking when starting a hole, eliminating the need for a center punch in most applications. This is especially valuable when drilling on curved surfaces or working with handheld power tools where precise hole placement is critical.

Black and Gold Surface Treatment

The black and gold surface treatment applied to the body and flutes provides maximum lubricity, better resistance to corrosion and breakage, and reduces chipping and flaking during operation. This treatment allows the drills to be used on most materials and contributes to longer tool life compared to uncoated or black oxide alternatives.

3-Flats Shank

The 3-flats shank design is specific to the mechanics length series and significantly reduces slippage in drill chucks during high-torque drilling operations. This feature improves safety and accuracy, particularly when using handheld power tools in demanding field conditions.

Mechanics Length (Shorter) Profile

The shorter mechanics length profile provides better accuracy, increased rigidity, and improved performance in tighter, more confined spaces compared to jobber length drills. Shorter length also mitigates deflection and breakage, making these drills a reliable choice for precision work in restricted access areas.

29-Piece Full Fractional Range Set

The set contains 29 drills covering 1/16" through 1/2" by 64ths, providing a complete fractional range in a single organized set. This eliminates the need to source individual sizes separately, ensuring the right drill is always on hand for the task.

Common Applications

Drilling in Medium and High Strength Materials

The NITRO® HSS construction and 135° split point make this set well suited for drilling holes in medium and high strength steels, including stainless steel grades that challenge standard HSS drills.

Heavy-Duty Drilling Operations

The heavy-duty design and premium M2 HSS material increase tool life and performance in demanding, high-cycle drilling environments where standard drills wear prematurely.

Drilling in Tighter or Confined Spaces

The mechanics length (shorter) profile provides the rigidity and reduced deflection needed to drill accurately in confined areas where jobber length drills would be impractical or prone to breakage.

Handheld Power Tool Operations

The 3-flats shank and self-centering split point are specifically advantageous when using handheld portable drills, reducing chuck slippage and improving hole-start accuracy without a center punch.

Fixed Spindle and CNC Machine Operations

The NITRO® series is designed for use in both portable hand drills and fixed spindle applications including CNC machines and drill presses, providing versatility across shop and field environments.

Compatible Materials

• Medium strength steels
• High strength steels
• Stainless steel
• Most general metalworking materials compatible with Black and Gold surface treatment

Product Documents

• Safety Data Sheet (SDS)
• Product Sheet
• 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 which may present health hazards if exposure limits are exceeded; perform in well-ventilated areas.
• 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 12–48 hours.
• Chromium: listed as a carcinogen by NTP and OSHA; associated with dermatitis, inflammation/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): most probable cause of respiratory diseases including occupational asthma and interstitial fibrosis; symptoms include productive cough, wheezing, shortness of breath, chest tightness, and weight loss.
• Skin contact: can cause irritation or allergic skin rash due to cobalt sensitization.
• Eye contact: may cause eye irritation.
• Fine metal particles produced when ground or sawed can burn; high concentrations in air may present an explosion hazard.
• NFPA Hazard Rating: Health 1; Flammability 0; Reactivity 0.
• Chromium and Vanadium are subject to SARA Title III Section 313 supplier notification requirements.
• Not hazardous under OSHA Hazard Communication Standard 29 CFR 1910.1200 in solid form; dust generated while using the product may be hazardous.
• Not regulated by DOT, IATA, or AFI for transport.

Personal Protective Equipment

• Eye protection: safety glasses or goggles with side shields; do not wear contact lenses when handling. Employer should provide an eye wash station in the immediate work area.
• Protective gloves: cloth or leather gloves recommended when contact with dust or mist is likely.
• Respiratory protection: use an appropriate NIOSH-approved respirator if airborne dust concentration exceeds the applicable PEL or TLV; all requirements of 29 CFR 1910.134 must be met.
• 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.
• Soiled clothing should be laundered separately.

Safe Handling

• Use 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. If airborne dust is generated, use a NIOSH-approved respirator.
• 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.
• 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.
• Dispose of in compliance with federal, state/provincial, and local environmental regulations; send to an appropriate reclamation facility if available.
• Speed, feed, and lubrication are all critical to cutting tool performance.

Frequently Asked Questions

Q: What type of steel are the NITRO® 350N drills made from?
A: All NITRO® drills are made from premium quality M2 High Speed Steel, recommended for heavy-duty drilling in a wide range of material groups including stainless steel.

Q: What is the difference between the 350N mechanics length and the 400N jobber length series?
A: The 350N mechanics length drills are shorter than jobber length (400N) drills. Shorter drills provide better accuracy, are more rigid, and are better suited for drilling in tighter, more confined spaces, while also mitigating deflection and breakage. The 350N also features a 3-flats shank to reduce slippage in drill chucks.

Q: Can these drills be used in CNC machines as well as handheld drills?
A: Yes. The NITRO® 350N series is designed for use in both portable hand drills and fixed spindle applications including CNC machines and drill presses.

Q: Why does the 350N have a 3-flats shank?
A: The 3-flats shank is specific to the mechanics length series and reduces slippage in drill chucks, providing a more secure grip during high-torque drilling operations compared to a standard round shank.

Q: What does the black and gold surface treatment do?
A: The black and gold surface treatment is applied to the body and flutes for maximum lubricity, better resistance to corrosion and breakage, and reduced chipping and flaking. It allows the drills to be used on most materials.

Q: What sizes are included in the 29-piece set?
A: The set contains 29 drills covering the full fractional range from 1/16" to 1/2" by 64ths increments.