50mm - 400mm Coolant Through Drill Bits Heavy Duty Drill Bit For Metal

Carbide Step Drill Bit With Through Coolant Hole For Heavy Duty Machining

Introduction:

AMG's advanced carbide step drill with through-coolant technology delivers unmatched performance in heavy-duty machining. Designed for high-production environments, this innovative tool combines multiple drilling operations into one while maintaining exceptional tool life and hole quality.

Features:

Integrated Step Design

• Combines pilot hole and chamfering in single operation

• Precision-ground steps maintain ±0.01mm diameter tolerance

• Saves 50-70% cycle time vs. conventional methods

Advanced Through-Coolant System

• 2-4 coolant channels (diameter dependent)

• Maintains 15-20Bar coolant pressure at cutting edge

• Reduces heat buildup by 40% in deep holes

Premium Carbide Construction

• Sub-micron grain structure (0.5μm) for maximum edge retention

• Heavy-duty web design withstands high feed rates

Specialized Coating Options

• AMG Hyper Coat (standard) for steel/stainless

• Diamond coating available for composites/CFRP

Performance Advantages:

50% faster than conventional twist drills in stacked/stainless steel

No secondary deburring required (clean hole edges)

Consistent accuracy across all step diameters (±0.02mm)

Typical Applications:

Automotive: Drilling+chamfering engine blocks

Aerospace: Stack material drilling

Energy: Flange hole preparation

General Engineering: High-volume production

Detailed Pictures:

Our workshop:

Promotion policy:

Free sample: Free samples can be provided, if client is willing to pay the shipping cost.

Special offer for new customers: Enjoy USD50 discount when you spend USD500+ on your first order.

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 Which payment methods do you accept?

We accept T/T, Credit card, etc.

4. 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.