Home Shop Walter SST+ Stub Drill Bit, Wire Gauge #3, Cobalt Blend
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01J003 - Walter SST+ Stub Drill Bit, Wire Gauge #3, Cobalt Blend

Packaging: 10 per each
$8.54/ea

Package Price:

$85.40/10 per each

Usually ships within 3-5 business days

SKU: 01J003 Categories: ,

OVERVIEW

High-Performance Drilling with Walter SST+ Stub Drill Bits

The Walter #3 SST Stub Drill Bit represents the pinnacle of drilling technology for industrial applications requiring precision, durability, and speed. Engineered specifically for the metalworking professional, this drill bit features a robust cobalt blend construction that significantly outperforms standard high-speed steel (HSS) bits. The inclusion of cobalt enhances the bit's red hardness, allowing it to maintain a sharp cutting edge even under the extreme temperatures generated when drilling through tough alloys like stainless steel and mild steel.

One of the defining characteristics of this tool is its "stub" or screw machine length. Unlike standard jobber length bits, the stub design features a shorter overall length and shorter flutes. This geometry drastically increases the torsional rigidity of the bit, minimizing deflection and vibration during operation. For industrial MRO environments, this means higher accuracy in hole placement and a substantial reduction in tool breakage, particularly when applying heavy feed pressure.

The Walter SST+ series is further distinguished by its exclusive Bronze SST surface treatment. This specialized coating facilitates smoother chip evacuation and reduces friction at the cutting interface, thereby extending tool life. The 135-degree split point geometry is a critical feature for efficiency; it allows the bit to self-center immediately upon contact with the workpiece, eliminating the need for center punching and preventing "walking" on curved surfaces. Whether utilized in stationary machining centers or portable drilling operations, the Walter #3 SST Stub Drill delivers consistent, professional-grade results in the most demanding materials.

Technical Specifications & Benefits

  • Material Composition: Premium Cobalt blend for superior heat and wear resistance.
  • Geometric Design: Stub length provides maximum rigidity, reducing the risk of snapping.
  • Point Angle: 135° split point ensures instant engagement and faster drilling speeds.
  • Surface Treatment: Bronze SST coating minimizes friction and heat buildup.
  • Application Versatility: Excellent for stainless steel, sheet metal, and non-ferrous metals.
Additional Information
Packaging Description:10 per each
Brand:Walter
Product Type:Stub Drill Bit
Material:Cobalt Blend
Size:#3 Wire Gauge
Used to Cut:Steel or Stainless or Aluminum
Point Angle:135° Split Point
Surface Treatment:Bronze SST
Flute Type:Short Flute
Drill Style:Stub Length (Screw Machine)
Diameter (Decimal Inch):0.2130"

INCLUDED

  • 1 x Walter SST+ Stub Drill Bit (Size #3)

APPLICATIONS

  • Drilling stainless steel components and panels
  • Sheet metal fabrication and auto body work
  • Drilling out spot welds
  • General fabrication with mild steel and non-ferrous metals
  • Portable drilling applications requiring high rigidity
  • Drilling on curved surfaces like pipes and tubing

FAQ

A stub drill (or screw machine drill) has a shorter overall length and shorter flutes compared to a standard jobber drill. This makes the stub drill much more rigid, reducing the chance of breakage and improving accuracy, especially in portable drilling.

Yes, the Walter SST drill bit is specifically designed with a cobalt blend to withstand the high heat and work-hardening properties of stainless steel.

The #3 wire gauge drill bit has a diameter of approximately 0.2130 inches.

Generally, no. The 135° split point design allows the bit to self-center and start drilling immediately without walking, eliminating the need for a center punch in most cases.

The Bronze SST surface treatment helps to reduce friction between the bit and the workpiece, which lowers heat buildup and facilitates smoother chip evacuation.

Absolutely. The stub length design is actually preferred for hand drills because the increased rigidity compensates for the natural wobbling of manual drilling, preventing the bit from snapping.

It is effective on mild steel, stainless steel, non-ferrous metals (like aluminum and copper), and sheet metal.

Cobalt increases the 'red hardness' of the steel, meaning the bit retains its hardness and cutting edge even at the high temperatures generated when drilling tough metals.

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