The APT 133 (M133CN) is the 8 in.-stroke, closed-nose rivet buster in American Pneumatic Tools’ U.S.-manufactured demolition lineup. The 8 in. stroke is the most commonly specified rivet-buster length deep enough to punch through standard bridge-deck and tank-wall sections in one blow while cycling at a quick 1,100 BPM on 42-46 CFM at 90 PSI, in T-handle (36 lb), D-handle or pistol-grip (30 lb) configurations.

A deep case-hardened alloy cylinder with heavy-duty upper and lower sleeves carries the impact load, and the closed nose keeps debris out of the front end on rebar and torch-cut steel. Every handle option runs Jumbo 11X steel cup chisels, flats, moils and backout punches. Within the APT family, the APT 633 drops weight for tight access and the APT 1133 adds reach; our rivet busters page compares them side by side.

• Workhorse 8 in. piston stroke with 1-3/16 in. bore reaches through standard deck sections in a single blow
• 1,100 BPM at 42-46 CFM and 90 PSI across all three handle configurations
• T-handle: 36 lb, 32 in. overall, 3/8 in. male inlet; D-handle and pistol grip: 30 lb, 22-1/2 in., 1/2 in. NPT female inlet
• Closed-nose front end keeps debris out during rebar and torch-cut steel work
• Jumbo 11X (.866 in.) shank, adjustable exhaust deflector and drop-forged handle construction
• Made in the USA; old MPNs 19444, 18768 and 18757 cross to current APT 1280-series numbers
• Applications: bridge-deck repair, reinforced concrete demolition, tank cutting and rivet head removal
• Crowder Supply stocks M133CN service parts in Denver, with free UPS Ground shipping

APT 133 FAQ

Is the APT 133 the same tool as the M133CN?
Yes M133CN is American Pneumatic Tools’ model designation for the 133. Older MPNs 19444 (T-handle), 18768 (D-handle) and 18757 (pistol grip) cross-reference to current APT numbers 1280174101, 1280583181 and 1280583339.

Can I still get parts for the APT 133?
Yes. Crowder Supply stocks M133CN cylinders, retainers, valves, throttle assemblies, sleeves and exhaust deflectors in Denver, alongside the full Jumbo 11X steel range.

Which handle style should I choose?
The 36 lb T-handle gives two-handed control on vertical deck work; the 30 lb D-handle and pistol grip trim overall length to 22-1/2 in. for horizontal and tight-access demolition. All three share the same 8 in. stroke and 1,100 BPM.

Why choose an 8 in. stroke?
It is the most commonly specified rivet-buster stroke long enough to punch through standard bridge-deck and tank-wall sections in one blow while still cycling at 1,100 BPM. The rivet buster buyer’s guide compares 6, 8 and 11 in. strokes side by side.