Isolated view of a single gold-finished Cobalt Steel jobber length drill bit, highlighting the flute design and the reduced shank.
Image showing a set of six gold-finished cobalt steel twist drills lying above the yellow retail packaging card which details the product features.
Close-up diagram of the 135° Split Point tip of the gold-finished cobalt drill bit, illustrating the angle for accurate centering and faster penetration.
Action shot of a gold-finished cobalt drill bit boring a hole into a thick steel base plate, showing metal shavings curling off the bit.
Isolated view of a single gold-finished Cobalt Steel jobber length drill bit, highlighting the flute design and the reduced shank.
Image showing a set of six gold-finished cobalt steel twist drills lying above the yellow retail packaging card which details the product features.
Close-up diagram of the 135° Split Point tip of the gold-finished cobalt drill bit, illustrating the angle for accurate centering and faster penetration.
Action shot of a gold-finished cobalt drill bit boring a hole into a thick steel base plate, showing metal shavings curling off the bit.
IVY Classic

IVY Classic Jobber Drill Bits 04029 29/64 Inch Cobalt Steel 6 Pack (135 Degree Split Point 3/8 Inch Reduced Shank Hard Metal Drilling Tool)

In stock
SKU: 04029
$9.99 USD
$62.28 USD Sale $9.99 USD

Description

IVY Classic 04029 29/64-Inch Cobalt Steel Jobber Length Drill Bit 6-Pack

The IVY Classic 04029 29/64-Inch Cobalt Steel Drill Bit 6-Pack delivers high-speed boring and severe thermal resistance when penetrating hardened alloy steel, titanium plate, and 300/400-series stainless metals. Forged from premium cobalt alloy high-speed steel with a heat-dissipating gold surface treatment, each jobber length bit features a 135-degree split point that centers instantly on contact without bit walking or center punch marks. The 3/8-inch reduced shank enables these 29/64-inch diameter bits to mount securely in standard 3/8-inch and 1/2-inch drill chucks for heavy metal fabrication and machine maintenance.

Best Used For:

  • Stainless Steel & Titanium Fabrication: Boring high-tolerance fastener holes through work-hardening stainless plate and high-tensile alloys without cutting lip glazing.
  • Machinery Maintenance & Retrofitting: Sizing precise 29/64-inch pre-tap holes through structural steel beams and cast iron gearboxes using standard 3/8-inch drill chucks.
  • Hardened Metal Drilling: Penetrating heat-treated frame rails, structural carbon steel, and grade 8 automotive components without tip breakdown.

Key Performance & Safety Features

  • Cobalt Alloy High-Speed Steel: Maintains core hardness and cutting edge sharpness under severe frictional temperatures that degrade standard HSS tooling.
  • 135-Degree Split Point: Self-centering tip geometry penetrates flat and curved surfaces immediately to eliminate drill walking and reduce feed pressure.
  • 3/8-Inch Reduced Shank: Allows 29/64-inch cutting diameter to seat directly into portable 3/8-inch drill chucks and stationary drill presses.
  • Precision-Ground Gold Finish: Specialized surface treatment improves chip lubricity, reduces heat buildup, and extends active cutting lifespan.
  • Jobber Length Flutes: Rigid 5-5/8-inch overall body profile balances deep hole reach with maximum torsional deflection resistance.

What's Included

  • (6) IVY Classic 04029 29/64-Inch Cobalt Steel Jobber Length Drill Bits

Technical Specifications

Specification Detail
Model Number 04029
Cutting Diameter 0.4531 in (29/64 in)
Overall Bit Length 5.625 in (5-5/8 in)
Shank Diameter 0.375 in (3/8 in Reduced Shank)
Shank Type Straight Round Shank
Point Geometry 135° Split Point (Self-Centering)
Material Metallurgy Cobalt Alloy High-Speed Steel (HSS)
Surface Finish Precision Ground Gold Oxide
Length Category Jobber Length
Package Quantity 6 Drill Bits
Material Suitability Stainless Steel, Titanium, Hardened Carbon Steel, Cast Iron, Plastics
Drill Chuck Compatibility Standard 3/8 in and 1/2 in 3-Jaw Keyed and Keyless Chucks
Pro-Tip: When using reduced-shank bits to drill thick stainless steel plates, ensure the 3/8-inch chuck jaws grip the entire reduced shank surface securely, and run at low RPM with sulfur-based cutting fluid to avoid shank slippage and cutting edge burn.