The Chicago Pneumatic CP 4611 is the long-stroke rivet buster in CP’s pneumatic demolition family. Its 11 in. cylinder stroke delivers more reach and per-blow energy than shorter tools, for bridge decks, abutments and pier caps whose thickness exceeds the single-blow capacity of a 6 or 8 in. stroke. It runs 720 BPM at 45 CFM and 90 PSI as a 34 lb D-handle or 33 lb open-grip tool, 26 in. overall.

Like the rest of the CPS-equipped line, the CP 4611 carries a teasing throttle, Boyer valve and durometer-rubber buffer ring with a wear-indicating groove on the lower sleeve. Its .890 x 1.125 in. tapered shank shares tooling inventory with the CP 4608, and Crowder Supply stocks the full Chicago Pneumatic rivet buster lineup alongside the broader rivet buster range. Weighing a breaker instead? See the guide to choosing a concrete breaking tool.

• Long 11 in. cylinder stroke for thick bridge-deck, abutment and pier-cap sections
• 720 BPM at 45 CFM air consumption and 90 PSI through a 1/2 in. NPT inlet
• D-handle CP 4611 D: 34 lb, inside trigger; open-grip CP 4611 P: 33 lb, outside trigger both 26 in. overall
• .890 x 1.125 in. tapered shank interchanges tooling with the CP 4608
• CPS Control Power System: teasing throttle, Boyer valve and durometer-rubber buffer ring
• Applications: heavy concrete demolition, bridge rehab, rivet removal, tank cutting and drift-pin driving
• Crowder Supply stocks tapered-shank steels and CPS service parts in Denver; free UPS Ground shipping

CP 4611 FAQ

CP 4611 D or CP 4611 P — which handle do I want?
The D-handle CP 4611 D (34 lb, inside trigger) suits general demolition with normal overhead clearance. The open-grip CP 4611 P (33 lb, outside trigger) is built for tight-overhead and underdeck work where the outside trigger protects your fingers.

What tool steel fits the CP 4611?
It takes .890 x 1.125 in. tapered-shank steel — the same shank as the CP 4608, so the two tools share tooling inventory. Browse rivet buster chisels in that taper.

How much air does the CP 4611 use?
Just 45 CFM at 90 PSI through a 1/2 in. NPT inlet, so a modest contractor compressor runs it comfortably.

Rivet buster or chipping hammer — which do I need?
A rivet buster’s long stroke (11 in. here) delivers heavy single-blow energy for thick concrete, bridge rehab and rivet cutting; a chipping hammer hits faster but lighter for surface and finish work. The rivet buster buyer’s guide compares stroke lengths and handle styles.