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Silver 1-5/8 inch HSS stub drill bit with split point

Drill America

Drill America DWDST 1-5/8" HSS Stub Drill Bit

SKU CH-XTYH-S22SG

A 1-5/8" HSS stub drill bit with a 135-degree split point for self-centering and reduced thrust, built to NAS 907 for portable or machine drilling in automotive and construction work

  • Self-centering 135° split point reduces thrust
  • Manufactured to NAS 907 aerospace standard
  • Short rugged construction suits broad material range
  • Ideal for portable or machine drilling
  • Popular in automotive and construction industries

Drill America DWDST 1-5/8" HSS Stub Drill Bit

This Drill America stub drill bit is built to National Aerospace Standard 907 for demanding industrial use. Its short, rugged construction suits automotive and construction professionals working where spindle clearance is limited. The 135-degree split point is self-centering and reduces thrust during operation. It performs reliably across a broad range of materials in both portable and machine drilling setups.

Thermals noise and power draw in normal use

The high-speed steel body manages heat effectively during short-run drilling cycles typical of screw-machine work. No forced cooling or lubrication system is integrated, so operators control feed and speed to limit temperature rise. Hand-held use produces vibration and sound levels consistent with standard twist drills of this diameter. Power consumption depends entirely on the drive motor and material being cut.

What the bundled accessories

No accessories, software or coatings are supplied with this bit. The bare high-speed steel surface requires the user to apply cutting fluid or paste for extended tool life in tough alloys. Without a surface treatment, wear resistance relies on the base material and correct drilling parameters. Buyers needing coated or indexed sets must source those components separately.

Highlights

  • Self-centering 135° split point reduces thrust
  • Manufactured to NAS 907 aerospace standard
  • Short rugged construction suits broad material range
  • Ideal for portable or machine drilling
  • Popular in automotive and construction industries

Specifications

BrandDRILL AMERICA

Questions about this item

How do I install the 1-5/8" HSS stub drill bit in a drill chuck and what step is often missed?

Insert the shank fully into the chuck jaws, then tighten securely. The step often missed is verifying the 135-degree split point runs true before drilling.

What maintenance or replacement will the DWDST 1-5/8" stub drill bit need over time?

The high-speed steel cutting edges dull with use. Resharpen the 135-degree split point to restore self-centering performance, or replace the bit when wear reaches the flutes.

What limit appears first on the 1-5/8" stub drill during sustained drilling in steel?

Heat buildup at the 135-degree split point reduces hardness fastest. Use cutting fluid and lower RPM to delay the loss of edge retention in tough materials.

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