Hammerhead® Moles


The revolutionary Catamount line of piercing tools from HammerHead offers the industry a reciprocating head tool that is easy to start, regardless of air pressure level, and is the first pneumatic piercing tool head effective in both hard and soft soil conditions.

HammerHead designed the Catamount so the head is driven by air that resets the head, eliminating the need for mechanical springs, which are a common source of failure in trenchless tool designs. This design allows for a faster and easier start by eliminating the need to overcome recoil found in competitive models. The Catamount design takes full advantage of reciprocating head technology by increasing production rates in all soil types and also reduces tool swim at any operating pressure.

The Catamount design features a one-piece body made of heat-treated alloy steel versus welded or tubular construction. This design allows HammerHead to use a much heavier striker, increasing overall impact force. The one-piece body also provides better durability and tool life.

The Catamount tool line is currently available in 2.5″ to 5.125″ (64mm to 130 mm) diameter tools.

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Active Head

HammerHead Active Head® Mole piercing tools are specially designed to perform in adverse ground conditions. The reciprocating head design features a double-strike system that utilizes the initial impact force to increase production in difficult soils such as cobble, hard clay and hardpan. The specially designed head / body retaining system and replaceable wear rings on the bit shaft and head promote longer life and sustained performance levels.

Active Head piercing tools are available in 2” to 3.5″ (50mm to 89 mm) models.

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Hammerhead Replaceable Head

The HammerHead original piercing tools are ideal for regular and soft soils. The ability to easily change the replaceable head leads to longer tool body life.

Original piercing tools are available in 2” to 8” (50mm to 200 mm) models.

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Power Port Reverse

This patented quarter-turn reverse feature pneumatically locks the tool into forward or reverse gear, preventing accidental direction change during the bore. The valve whip is designed to be flexible, preventing tool binding if a bore collapse occurs.

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Debris Free Tailcone

Designed to eliminate the introduction of debris into the tool body, increasing overall production and tool life.

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Original Clamped Rear Anvil

Don’t settle for imitations. This original and field tested design provides for fast and easy field maintenance, the hallmark of the entire HammerHead Mole piercing tool line. Provides 200% more clamp load and is the most secure and proven assembly available.

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Striker Wear Rings

Wear rings eliminate metal to metal contact decreasing wear and offering a sustained level of performance. Made of a specially designed composite, these rings offer a very low coefficient of friction and have a higher abrasion resistance compared to Teflon rings used in competitive tools.

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2.00 (50) x x x x x
2.50 (64) x x x x x x
3.00 (76) x x x x x x
3.50 (89) x x x x
4.00 (102) x x x x
4.38 (111) x x x
5.13 (130) x x x x x

For more information on these and other Hammerhead products please visit the Hammerhead Website

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