140 Degree Carbide Step Drill Inner Coolant Straight Flute Drill

140 Degree Carbide Step Drill Bit Straight Flute Inner Coolant Solid Carbide CNC Bits

Introduction:

This high-performance solid carbide step drill bit features a 140° point angle and straight flutes, optimized for precision drilling in CNC machining. The internal coolant channels enhance heat dissipation, extend tool life, and improve chip evacuation in demanding materials like stainless steel, hardened steel, cast iron, and aerospace alloys.

Features:

1. Material: Solid carbide (ultra-hard, wear-resistant).

2. Point Angle: 140° for reduced thrust force and improved centering.

3. Flute Design: Straight flutes for efficient chip removal in deep holes.

4. Coolant System: Inner coolant holes (through-tool coolant) to reduce heat and prevent workpiece/tool damage.

5. Application: CNC machining, mold making, automotive/aerospace parts, and high-precision multi-step drilling.

6. Coating Options: Optional TiAlN/AlCrN coatings for higher heat resistance.

Performance Advantages:

• Longer tool life due to carbide durability and coolant support.

• High rigidity minimizes deflection in deep holes.

• Multi-diameter steps allow graduated hole sizing in one operation.

Typical Applications:

• • Drilling, chamfering, and deburring in one pass.

  • Hard materials (HRC 45+), composites, and exotic alloys.

Detailed Pictures:

Our workshop:

Promotion policy: 

To help you experience our premium products, we’re excited to offer the following exclusive promotions for first-time buyers:

1.Free Test Samples

Get free samples (total value ≤ $20 USD) when you cover the international shipping cost.

Perfect for evaluating our product quality and performance risk-free.

2.$50 USD Discount on First Order

New customers can enjoy a $50 discount on the first order of $500 or more.

A great way to start our partnership with extra value!

FAQ:

1. Which shipping method do you usually use?

We usually send goods by express like FedEx, UPS, DHL, TNT, EMS, ETC.

We also can send products to your shipping agent in China.

2. How about the delivery time?

For stock items, we can dispatch within 2 business days after receiving payment.

For the out-of-stock items, it depends on the quantity.Usually is around 5-7 business days.

3. Can you do OEM? 

Yes, we can.

4. Where is your factory.

Our factory is in Changzhou City, Jiangsu Province, China.

It’s around 1 hour from Shanghai by High-Speed Train.

5. Can you produce special carbide tools?

Yes, we can produce special carbide tools according to your drawings or samples.And we also can design the tools according to the drawing of your work pieces.