The Rhino PD-55 is a 55 lb medium-duty pneumatic post driver that runs approximately 1,700 blows per minute on 42 CFM at 90 PSI light enough for one operator, strong enough for T-posts, channel posts and round posts up to 3-1/2 in. A single reciprocating alloy-steel piston with a double valve is the only moving part, which keeps maintenance low across the most popular model in the Rhino pneumatic post driver line.

The 3-7/8 in. master chuck takes round-post adapters from 1 to 3-1/2 in. plus caps for T-post, channel post and 4-1/16 in. square wood post, and a slotted-chuck PostMaster variant is selectable on this page. Proper air plumbing throttle valve, filter-regulator-lubricator and rock drill oil protects that piston; PD-55 kits put all of it on one order, and the post driver buyers guide covers when to step up to a heavier model.

• 3-1/2 in. alloy steel piston delivers approximately 1,700 BPM at 90 PSI
• 42 CFM at 90 PSI air consumption runs comfortably from a small tow-behind compressor
• 3-7/8 in. round master chuck standard; PostMaster slotted chuck variant selectable on this page
• Adapters cover 1, 1-1/2, 2, 2-1/2, 3 and 3-1/2 in. round posts plus T-post, 1.24 lb/ft channel post and 4-1/16 in. square wood post
• One moving part a double-valve reciprocating piston for low maintenance and long service life
• Adapters and drive caps interchange with the Rhino HPD-60 hydraulic driver for shared fleet inventory
• 55 lb working weight fits tight jobsites and single-operator crews
• Stocked by Crowder Supply in Denver; free UPS Ground shipping to the lower 48

PD-55 FAQ

What size air compressor does the PD-55 need?
It consumes 42 CFM at 90 PSI, so a small tow-behind compressor runs it comfortably; the air compressor buyer’s guide helps size a unit if you are buying both.

Can the PD-55 drive PostMaster posts?
Yes — choose the PostMaster slotted-chuck variant on this page and it drives PostMaster fence systems directly.

What posts does it handle?
T-posts, channel posts from 1.2 to 4 lb/ft, round posts from 1 to 3-1/2 in. via the adapter set, and 4-1/16 in. square wood posts.

Do PD-55 accessories fit other Rhino drivers?
Yes: adapters and drive caps interchange with the HPD-60 hydraulic driver, and an optional 4-1/4 in. master chuck lets fleets share one accessory inventory with PD-110s.