Atlas Copco Cobra Gas Line — Gas Paving Breakers, Rock Drill & Tie Tamper
Three different tools on one engine platform, and none of them needs a compressor: the Cobra PROe is a pure 44 ft-lb paving breaker, the Cobra Combi breaks and drills rock to 6.5 ft, and the Cobra TT is tuned for railroad tie tamping. Each has its own section below — pick by the job, not the family.
The short version
Only breaking concrete, asphalt, or rock? The Cobra PROe — the hardest-hitting gas breaker made. Breaking and drilling holes? The Cobra Combi, the only one that is also a rock drill. Tamping railroad ties? The Cobra TT. Air and hydraulic jackhammers across all brands live at the paving breakers & jackhammers category.
The Breaker: Cobra PROe
Pure demolition — the strongest gas blow made.
Cobra PROe — The Gas Paving Breaker
A dedicated breaker, nothing else — and the strongest blow in the gas world: 44 ft-lb at the tool tip does true 90-lb-class demolition from a 53-lb machine one worker carries in. Silica rock and reinforced concrete are its lane; alkylate fuel keeps exhaust manageable, and the Shorty version trims 2 lb and 2 in. for confined work.
Choose it when: you break away from a compressor — utility cuts, rural fence rock, trail work, emergency response — and you never need to drill.
Key specs
The Breaker-Drill: Cobra Combi
Breaks like a breaker, drills like a rock drill — the all-in-one.
Cobra Combi — The Breaker That Also Drills Rock
The dual-purpose machine: flip the switching mechanism and it goes from a 55-lb paving breaker to a rotary rock drill boring 8–12 in. per minute in solid granite, to 6.5 ft deep on extension steels. It gives up tip energy to the PROe (15–18 ft-lb vs 44) but it is the only gas machine here that makes holes — anchors, plug-and-feather splitting, fence posts in ledge, blast pilots.
Choose it when: the same crew breaks and drills — one machine, one fuel can, no compressor.
Key specs
The Tie Tamper: Cobra TT
The railroad specialist — ballast consolidation, not demolition.
Cobra TT — The Tie Tamper
Not a demolition tool at all: the TT’s 30 ft-lb blows at a faster 1,620 BPM are tuned to consolidate ballast under railroad ties without pulverizing the stone — the recipe track crews need for spot tamping, tie replacement, and short-line surfacing, walking the right-of-way with no compressor truck on the ballast.
Choose it when: you maintain track — and if you also break crossings occasionally, it handles light breaker duty too.
Key specs
Three Tools, One Platform
| Cobra PROe | Cobra Combi | Cobra TT | |
|---|---|---|---|
| What it is | Paving breaker | Paving breaker + rock drill | Tie tamper |
| Breaks concrete/rock | Best — 44 ft-lb | Yes — 15–18 ft-lb | Light duty only |
| Drills rock | No | Yes — to 6.5 ft | No |
| Tamps ties | No — too hard a blow | No | Yes — tuned for it |
| Impact rate | 1,440 BPM | 2,700 BPM | 1,620 BPM |
| Engine | 90cc, 2 hp | 185cc, 2.7 hp | 90cc, 1.5 hp |
| Price | $4,704 | $6,088 | $4,704 |
Scroll sideways for the full table.
Cobra Gas Line Questions
Which Cobra do I need?
By job: PROe if you only break — its 44 ft-lb blow is nearly three times the Combi’s. Combi if you also drill holes in rock — it is the only gas rock drill in the line. TT if you tamp railroad ties — its softer, faster blow packs ballast instead of crushing it. They share the engine platform, fuel, and carry weight; the working end is what differs.
Can the Cobra Combi replace the PROe for breaking?
For occasional breaking, yes. For daily demolition, no — 15–18 ft-lb against 44 is a real gap, and crews that break every day feel it. Buy the tool that matches the majority of the work and borrow the other capability when needed.
Why not tamp ties with the PROe or Combi?
Blow energy: a full-power breaker pulverizes ballast into fines that will not hold surface. The TT’s tamping-tuned 30 ft-lb at 1,620 BPM consolidates the stone — that is the entire reason it exists.
What fuel and oil do they run?
Regular 90–100 octane gasoline at a 2% (50:1) two-stroke mix; the PROe and TT also run clean alkylate fuel. We stock the factory synthetic 2-stroke oil.
What steels and tools fit each one?
PROe and TT take standard breaker-shank tools in 1-1/4 x 6, 1-1/8 x 6, or 1 x 4-1/4 in.; the Combi runs 7/8 x 4-1/4 in. hex drill steels with carbide bits, plus breaker tools for its demolition mode. All ship in the same order from our steel stock.
How fast do they ship?
All three ship same day by flat-rate Freight on orders by 4 PM Eastern, with steel, tamping tools, and oil in the same shipment. Service kits and filters for the Cobra family are stocked.
One Engine Platform, Three Different Jobs
Tell us whether the day is breaking, drilling, or tamping and we will put the right Cobra — with its steel and oil — on the truck.