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01W951 - Walter SST+ Multi-Step Drill Bit Set - 3 Piece AlCrN Coated

Packaging: 1 of each
$519.42/ea $432.85/1 of each only $432.85/eaSave 17%

In stock

SKU: 01W951 Categories: ,

OVERVIEW

High-Performance Multi-Step Drilling Solution

The Walter Surface Technologies 01W951 Multi-Step Drill Set represents the pinnacle of hole-making efficiency for industrial maintenance and fabrication. Designed to tackle the unique challenges of drilling thin gauge materials, this set utilizes advanced metallurgy and coating technologies to deliver precise, burr-free holes without the deformation often caused by standard twist drills. The core of this performance lies in the special bronze SST heat and surface treatment, which conditions the high-speed steel substrate to withstand the rigors of continuous use in hard metals.

What sets this drill set apart is the application of an AlCrN (Aluminum Chromium Nitride) coating. Unlike basic black oxide or standard titanium coatings, AlCrN provides exceptional oxidation resistance and hot hardness. This is particularly critical when drilling stainless steel, where friction heat can rapidly dull cutting edges. The coating acts as a thermal barrier, directing heat away from the tool and into the chip, thereby significantly prolonging the service life of the bit. This makes the 01W951 an essential asset for MRO environments where tool longevity and reliability directly impact downtime.

Operational stability is ensured through a thoughtful geometric design. Each bit features two wide, cylindrical flutes that efficiently evacuate chips, preventing build-up that can lead to binding or overheating. The shank is engineered with three flats, a crucial feature for high-torque applications, ensuring the bit remains positively locked in the chuck without slipping. This set includes three essential sizes covering a vast range of hole diameters from 1/8-inch up to 1-3/8-inch, making it a versatile solution for electrical panels, HVAC ducting, and automotive bodywork.

Key Technical Benefits

  • Advanced Coating: AlCrN coating outperforms TiN in high-temperature applications.
  • Vibration Control: Geometry designed to minimize chatter and distortion in sheet metal.
  • Secure Mounting: 3-flat shank eliminates chuck slippage.
Additional Information
Packaging Description:1 of each, 1 set
Item:Drill Set
----- new values below ----
Coating:AlCrN
Flute Type:2 Wide Cylindrical
Shank Type:3-Flat
Material Suitability:Stainless Steel, Sheet Metal, Non-Ferrous Metals
Set Count:3 Pieces
Brand:Walter
Packaging Description:1 set
Item:Drill Set

INCLUDED

  • (1) 13-step bit: 1/8" to 1/2" range
  • (1) 12-step bit: 3/16" to 7/8" range
  • (1) 10-step bit: 1/4" to 1-3/8" range
  • Heavy-duty storage case

APPLICATIONS

  • Drilling connection holes in electrical panels and junction boxes
  • Creating access points in HVAC ductwork and sheet metal enclosures
  • Enlarging existing holes in automotive body panels
  • Fabrication of stainless steel countertops and backsplashes
  • General maintenance and repair on thin-gauge machinery guards
  • Plumbing and pipe fitting access holes

FAQ

AlCrN (Aluminum Chromium Nitride) offers superior heat resistance and hardness compared to standard coatings, making it ideal for drilling tough materials like stainless steel where heat buildup is a major factor.

Yes, the combination of the high-speed steel core, bronze SST treatment, and AlCrN coating makes them specifically suitable for drilling stainless steel sheet materials.

These step drills are designed for sheet materials typically up to 1/8 inch thick. Attempting to drill thicker solid stock may prevent the step geometry from working effectively.

No, these multi-step bits feature a self-starting tip that prevents walking, allowing you to drill precise holes without pre-punching.

The set includes three bits with the following ranges: 1/8" to 1/2" (13 steps), 3/16" to 7/8" (12 steps), and 1/4" to 1-3/8" (10 steps).

The shanks have three ground flats to ensure the chuck jaws grip the bit securely, preventing it from spinning inside the drill chuck during high-torque cuts.

While it is technically possible to regrind the flutes, it is difficult to maintain the step geometry and coating performance. It is generally recommended to replace the bit once it becomes dull to ensure safety and cut quality.

Yes, using a high-quality cutting lubricant like Walter Coolcut is highly recommended, especially when drilling stainless steel, to further extend the life of the tool.

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