Dormer Pramet HX Jobber Drills Boost Efficiency and Rigidity

Dormer Pramet's HX high-speed steel jobber drills feature a combination of substrate and drill angle that reduces thrust requirements and increases rigidity.


Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon
A press photo of Dormer Pramet's HX series high-speed steel jobber drill, the latest addition to its precision twist drills

Dormer Pramet has introduced a new model to its precision twist drill products with the HX series of high-speed steel jobber drills.

The company says combining the toughness of a high-speed steel substrate with a 135-degree split-point design reduces thrust requirements and eliminates walking while providing greater strength and rigidity than general purpose drills. Users achieve increased efficiency and better tool life, resulting in reduced cost per hole.

Comparing the HX series drills to other high-speed steel, heavy-duty jobber drills, Dormer Pramet says the PTD HX can deliver up to 70% more holes in moderate conditions, with its versatility enabling it to also deliver up to 18% more holes in heavy conditions and up to 30% more holes in light conditions.

HX series precision twist drills sport a flute geometry optimized for effective chip evacuation, and the distinctive purple-and-bronze oxide coating they leave behind increases wear resistance. The HX is available in HX10 (fractional sizes), HX15 (letter sizes) and HX18 (wire gauge sizes), with Dormer Pramet also offering a 29-piece fractional set (sizes 1/16” – 1/2” x 64ths).


  • Taking The Fear Out Of Hard Turning

    To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.

  • Where Dry Milling Makes Sense

    Liquid coolant offers advantages unrelated to temperature. Forced air is the fluid of choice in this shop...but even so, conventional coolant can't be eliminated entirely.

  • Successful Application Of Ceramic Inserts

    Applying ceramic inserts is not a simple substitution of one cutting tool material for another. There are significant process considerations that shops should examine carefully in order to realize performance and tool life expectations from ceramic inserts. Here's a look at some of the ways they are used.