The American Pneumatic Tools M43 is a 21 lb, 3-cylinder chipping hammer built around APTs patented automatic ball valve and a four-bolt drop-forged handle secured with grade 8 bolts for fast field service. A 1-1/8 in. bore and 3 in. stroke deliver 1,650 BPM for cleanup, surface preparation and light demolition, placing it mid-pack in the APT chipping hammer line that Crowder Supply carries.

Configuration happens on this page: .580 in. hex or .680 in. round chuck, with a ball retainer and spring, an oval-collar retainer and spring, or a bolt-on retainer to match how your crew changes steel. The 7/8-24 female inlet accepts a standard hose whip with line oiler, keeping the deep case-hardened cylinder fed with oil at its 3335 CFM draw. Compare frames and strokes across all our air chipping hammers, with matching chisels stocked in both shanks.

• 3 in. stroke at 1,650 BPM through a 1-1/8 in. bore
• Chuck options: .580 in. hex or .680 in. round, with ball, oval-collar or bolt-on retainer styles
• Patented APT automatic ball valve (U.S. Pat. 8,276,682 B2) for reliable cycling
• Four-bolt drop-forged handle with grade 8 bolts for fast field service
• 3335 CFM at 90 PSI; 7/8-24 female inlet; 21 lb; 16-3/4 in. overall length
• Applications: cleanup, surface preparation, scaling and light demolition
• From American Pneumatic Tools, a long-established U.S. manufacturer of chipping and demolition tools with deep aftermarket parts support
• Stocked in Denver by Crowder Supply; ships free by UPS Ground

APT M43 FAQ

What size compressor runs the M43?
It draws 3335 CFM at 90 PSI, so a 50-CFM compressor supports one tool in continuous use and a 185-CFM machine runs multiple operators on the same circuit our air compressors cover both ends.

Why does a four-bolt chipping hammer matter?
The back-head is secured by four grade 8 bolts through a drop-forged handle, so the tool comes apart and goes back together quickly for field service while staying rigid under sustained scaling work.

Which chuck and retainer should I pick?
Order the .580 in. hex or .680 in. round chuck to match the shank of your existing steel, then choose a ball retainer with spring, an oval-collar retainer with spring, or a bolt-on retainer to suit how your crew swaps chisels.

Is a 3-cylinder hammer the right size for my work?
The M43s 3 in. stroke suits cleanup, surface preparation, weld cleanup and light demolition; the chipping hammer buyers guide walks through when a shorter or longer stroke serves better.