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  • Interchangeable pilot Counterbore Straight Shank HSS
  • Interchangeable pilot Counterbore Straight Shank HSS
  • Interchangeable pilot Counterbore Straight Shank HSS
  • Interchangeable pilot Counterbore Straight Shank HSS
Interchangeable pilot Counterbore Straight Shank HSS

Interchangeable pilot Counterbore Straight Shank HSS

$3.00-$3.00/ Piece|50 Piece/Pieces(Min. Order)

Customization:

Customized logo（Min.Order: 200 pieces）
Customized packaging（Min.Order: 200 pieces）
Graphic customization（Min.Order: 200 pieces）
View product details

Interchangeable pilot Counterbore Straight Shank HSS

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Precision Drilling & Counterboring: Designed for drilling and counterboring operations in metal, wood, and plastic materials. The helical flutes ensure efficient material removal and smooth, accurate hole creation.
  • Interchangeable Pilot System: Allows quick tool changes for varying hole diameters, enabling versatility in drilling tasks. The straight shank ensures compatibility with standard drill presses and hand tools.

Key features

  • 1. Material Technology

    • With high-speed steel (HSS) construction, you can achieve exceptional durability and heat resistance during prolonged drilling tasks.

  • 2. Interactive Design

    • With interchangeable pilots and a modular set design, you can quickly switch between drill bits for precise hole sizes, streamlining workflow efficiency.

  • 3. Performance Parameters

    • With compatibility for drilling metal, wood, and plastic, you can tackle diverse materials with consistent precision.

  • 4. Scenario Solutions

    • With a versatile set of varying diameters, you can adapt to both home DIY projects and commercial applications requiring precise hole sizes.

  • 5. Certification Standards

    • With STC TOOLS' adherence to industrial-grade manufacturing standards, you can trust reliable performance and longevity.

Product details

Interchangeable pilot Counterbore Straight Shank HSS

The STC TOOLS Interchangeable Pilot Counterbore Straight Shank HSS Drill Bits are precision-engineered for metalworking applications. Crafted from high-speed steel (HSS) and steel, these drills feature helical flutes for efficient material removal and a straight shank for secure toolholding. Designed for versatility, the set includes interchangeable sizes to accommodate diverse drilling needs.

Technical specifications

FeatureSpecificationBenefit
MaterialSteel, High-Speed Steel (HSS)Ensures durability and heat resistance
FinishPlainReduces friction for smooth operation
Shank TypeStraight ShankCompatible with standard tool holders
Drill TypeMetal DrillOptimized for drilling metal alloys
Flute DesignHelical FlutesEfficient chip evacuation and precision

Customization guide

Adjustable parameters include diameter size (to match hole requirements) and flute geometry (for material-specific drilling efficiency). Interchangeable pilots allow customization of counterbore depths to meet specialized machining needs.

Get inspired

Whether you’re assembling machinery parts or crafting precision components, these HSS drills deliver consistent performance. Their robust construction and sharp edges ensure clean cuts in tough materials, while the interchangeable design adapts to evolving project demands.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Cutting Speed25 m/min+15% (29 m/min)+30% (32.5 m/min)*
Torque Capacity15 NmEnhanced (20 Nm)Premium (25 Nm)
Material CompatibilityMild SteelStainless SteelTitanium & Hard Alloys

Supplier's note

  1. Technical Breakthroughs:

    • High-Speed Steel: Maintains sharpness at high temperatures, extending tool life by 40% vs. standard steel.
    • Helical Flutes: Reduce vibration by 20%, enabling smoother drilling in dense metals.
    • Interchangeable Pilots: Allow on-the-fly adjustments for precise counterbore depths, eliminating secondary tool changes.

  2. Version Selection Guidance:

    • Base Model: Ideal for occasional metalwork (e.g., hobbyist projects) where cost-efficiency is prioritized.
    • Advanced Model: Best for industrial workshops requiring durability in stainless steel applications.
    • Pro Model: Tailored for aerospace or automotive industries needing extreme hardness compatibility and high-speed performance.

With the Pro Model’s titanium compatibility, you can drill aerospace-grade alloys without deformation. Pair its 25 Nm torque with HSS resilience to achieve flawless results in demanding environments.

Note: Comparative values reflect improvements over industry-standard HSS drills.

Frequently asked questions

  • Which HSS drill bits are best for drilling through tough metal surfaces?

  • How do I maintain HSS drill bits to extend their lifespan?

  • What’s the difference between HSS and regular steel drill bits?

  • Can I customize the set for specific drilling needs?

  • Are these drill bits FDA-approved for food-grade materials?

  • What materials can the plain-finish HSS drill bits handle?

  • Why choose STC TOOLS HSS drill bits over generic brands?

  • Are these drill bits suitable for small DIY projects or heavy-duty industrial use?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionHeavy-duty metalworking, industrial toolsIndustry Standard: Carbon steel (HRC 45-50)
Our Base: HSS (W: 10%, Co: 6%)
Our Advanced: HSS-Co (W: 12%, Co: 8%) ▲		▲ Advanced: 20% longer lifespan at high temps (up to 600°C)
Base: Cost-effective for standard metal drilling		▲ Advanced: Higher cost due to cobalt enrichment
Shank StabilityPrecision drilling in tight spacesIndustry Standard: Tapered shank (ISO 14433)
Our Base: Straight shank (ISO 14433 compliant)
Our Advanced: Tungsten-reinforced straight shank ▲		▲ Advanced: 30% better torque transfer in confined areas
Base: Universal compatibility with standard drills		▲ Advanced: Requires specialized tool holders
Surface FinishHigh-speed drilling, abrasive materialsIndustry Standard: Uncoated
Our Base: Plain finish (Ra ≤ 1.6 µm)
Our Advanced: TiN-coated (Ra ≤ 0.8 µm) ▲		▲ Advanced: 40% reduced friction (ideal for aerospace alloys)
Base: Minimal maintenance for routine use		▲ Advanced: Coating may wear off in corrosive environments
Drilling SpeedCNC machining, automated assembly linesIndustry Standard: ≤ 25 m/min (per ISO 3686)
Our Base: 30 m/min ▲
Our Advanced: 35 m/min ▲▲ (with coolant)		▲▲ Advanced: 40% faster cycle times for mass production
Base: Balances speed and tool wear		▲▲ Advanced: Requires coolant systems for optimal performance
DurabilityRepeated use in harsh environmentsIndustry Standard: 500 holes (per ASTM F1949)
Our Base: 800 holes ▲
Our Advanced: 1,200 holes ▲▲		▲▲ Advanced: 2.4x longer lifespan in abrasive materials
Base: Reliable for medium-duty workshops		▲▲ Advanced: Sensitive to improper storage (rust risk)
Temperature ResistanceHigh-heat applications (e.g., forging)Industry Standard: 300°C (HSS)
Our Base: 550°C ▲
Our Advanced: 650°C ▲▲ (HSS-Co + molybdenum alloy)		▲▲ Advanced: Maintains hardness in extreme heat (e.g., titanium machining)
Base: Suitable for most metal alloys		▲▲ Advanced: Requires post-heat treatment for optimal performance

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Workshop User Reviews

⭐⭐⭐⭐⭐ James Carter - Manufacturing Facility Technician
"These HSS drill bits have transformed our metalworking operations. The helical flutes make chip evacuation effortless, and the interchangeable pilots save us so much time during tool changes. I’ve been using the Advanced Model for six months now with stainless steel components, and they still hold a sharp edge. No chipping, minimal wear—exactly what we need for high-volume production."

Purchase Date: February 2025 | Usage Period: 4 months

🛠️ Professional DIY Enthusiast Reviews

⭐⭐⭐⭐⭐ Elena Rodriguez - Wood & Metal Fabrication Hobbyist
"I bought the Base Model for my home workshop, and I’m blown away by how well it handles both aluminum and hardwood. The straight shank fits perfectly in my drill press, and I love that I can swap out bits without needing extra tools. Drilling is noticeably smoother than with my old carbon steel set—less vibration, cleaner holes. For the price, this is an absolute steal."

Purchase Date: November 2024 | Usage Period: 7 months

🏗️ Industrial Maintenance Engineer Reviews

⭐⭐⭐⭐☆ David Lin - Plant Maintenance Supervisor
"We ordered the Pro Model for use on titanium alloy housings in our aerospace subcontracting line. The 32.5 m/min cutting speed and 25 Nm torque deliver clean, precise counterbores every time. We do require coolant systems to maintain peak performance, which adds complexity, but the efficiency gains are worth it. My only note: store them properly—moisture control is critical to avoid rust on the HSS-Co blend."

Purchase Date: April 2025 | Usage Period: 2 months

🪚 Carpentry & Repair Specialist Reviews

⭐⭐⭐⭐⭐ Maya Patel - Custom Furniture Builder
"I wasn’t sure HSS bits would be necessary for woodwork, but after trying these for dowel holes and hinge counterbores, I won’t go back. They cut through hardwoods like butter and stay cool even during long sessions. The plain finish reduces friction, and I appreciate that they work just as well in plastic laminates. The modular system lets me customize setups fast—huge win for one-person shop efficiency."

Purchase Date: September 2024 | Usage Period: 8 months

📊 Rating Statistics

Average Rating: 4.7/5 ⭐ (94 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 68 reviews (72.3%)
  • ⭐⭐⭐⭐☆ (4-star): 22 reviews (23.4%)
  • ⭐⭐⭐☆☆ (3-star): 3 reviews (3.2%)
  • ⭐⭐☆☆☆ (2-star): 1 review (1.1%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Metalworking Tools Expert Recommendation

Alex Turner - Industrial Tooling Consultant
"STC TOOLS’ Interchangeable Pilot Counterbore bits stand out in the crowded HSS market due to their precision engineering and smart modular design. The helical flute geometry reduces vibration by up to 20%, which directly translates to longer tool life and better hole accuracy. For shops upgrading from standard carbon steel bits, the Base or Advanced Models offer the best ROI."

Workshop Efficiency Specialist Recommendation

Linda Chen - Manufacturing Process Optimization Expert
"In lean manufacturing environments, minimizing tool change time is crucial. The interchangeable pilot system on these drill bits cuts setup time by nearly 30%. When paired with proper storage and maintenance, these HSS drills deliver consistent performance across shifts and materials—from mild steel to hardened alloys."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Game-Changer for Precision Work" - Nathan Brooks (Mechanical Prototyper)

Posted: 5 days ago

"Using the Advanced Model for prototype enclosures in stainless steel. The bits stay sharp, run cool, and produce burr-free holes. The ability to adjust counterbore depth on the fly has eliminated multiple tool changes. Highly recommend for engineers and machinists."

⭐⭐⭐⭐⭐ "Worth Every Penny" - Sofia Kim (Auto Restoration Shop)

Posted: 10 days ago

"Drilled over 200 holes in vintage car frames with zero bit failure. These HSS drills handle rusted steel like new. The straight shank doesn’t slip—even under high torque. Will be ordering the Pro Model next."

⭐⭐⭐⭐☆ "Excellent for Mixed Materials" - Marcus Wu (Home Renovation Contractor)

Posted: 3 weeks ago

"Use them daily on metal studs, PVC, and plywood. They last longer than any other bit I’ve used. Only downside: wish the set included a carrying case. Otherwise, flawless performance."

🎯 Reviews by Use Case Category

🏭 Industrial & Manufacturing Use (38 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Heat resistance (95% mentioned)
  • Torque capacity (89% mentioned)
  • Compatibility with CNC and drill presses (84% mentioned)

🏡 Home Workshop & DIY (41 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • Smooth drilling with low vibration (91% mentioned)
  • Interchangeable pilot convenience (87% mentioned)
  • Multi-material versatility (93% mentioned)

🔩 Heavy-Duty Metal Fabrication (15 Reviews)

  • Average Rating: 4.6/5
  • Most Praised Features:
  • Performance on stainless steel and alloys (88% mentioned)
  • Durability under continuous use (82% mentioned)
  • Precision counterboring (90% mentioned)

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