Pilot Bit RR1.75 SQ Rock Ripper | Pengo Attachments By Paladin

Overview

This Pengo rock bit auger pilot — the RRP 1.75 SQ, stocked as PG-137208 — is the centre pilot on the Pengo Severe Rock Ripper auger. At 15 lb it is by far the heaviest pilot Pengo builds, rated 5 and 6 on their soil chart for gravel and fracturable rock. It mounts into the auger head through a 1.75" square shank, so fitment follows the Severe Rock Ripper head rather than the machine quick attach behind it. Nuts and bolts are included.

Key Features of the Pengo RRP 1.75 SQ Rock Bit Auger Pilot

• The pilot on the Severe Rock Ripper, Pengo's most robust auger in the general-purpose line.
• 15 lb — three times the weight of a TriFlow dirt pilot, which is what rock work demands.
• 1.75" square shank; use the 1.75SQ adapter, part 137203, where an adapter is required.
• Ships with four Strata SR-76SW carbide teeth when purchased individually.
• Nuts and bolts included, so nothing else is needed to fit it.
• Pengo soil rating 5–6: gravel and fracturable rock.
• A rock auger pilot bit, not a reinforced dirt one — the 1.75 square pilot bit mounting is specified for rock-drilling torque.
• Supplied alongside genuine Pengo auger teeth, so pilot and teeth come from the same wear system.

Why a Rock Pilot Is Not a Heavier Dirt Pilot

• The pilot takes the first hit. In rock the centre does the hardest work, and a dirt pilot is destroyed doing it.
• Square shank, not threaded. A square shank pilot bit transmits rock-drilling torque in a way a light threaded mounting cannot.
• Carbide teeth included. Bought individually it arrives with four Strata SR-76SW teeth, so the pilot is ready to work.
• Protecting the head is the point. A worn pilot lets the auger head take impact it was never meant to absorb.

Pengo RRP 1.75 SQ Pilot Specifications

Specification Detail Stocked part number PG-137208 Pengo item RRP 1.75 SQ rock pilot Weight 15 lb Pengo soil rating 5 – 6 (gravel, fracturable rock) Shank 1.75" square Adapter (where required) 1.75SQ adapter, part 137203 Supplied with Four Strata SR-76SW carbide teeth when purchased individually Hardware Nuts and bolts included

The Severe Rock Ripper Wear Set

The pilot is one half of the SRR cutting set. The teeth around the head are the S-RL08 conical rock teeth as standard, upgradeable to SR-76SW Strata carbide. Pilot and teeth wear at different rates, so inspect both rather than assuming one tells you about the other. Worn teeth come off with the C123 puller, or the C30 puller if you have moved up to Strata.

For dirt rather than rock, the same drive runs an Aggressor auger with a TriFlow 350 pilot — a 5 lb pilot rated 1-2-3 rather than a 15 lb one rated 5-6. If you only occasionally hit rock, the BoRH bolt-on rock head converts the Aggressor instead of running a second dedicated auger.

What This Pilot Fits

The RRP 1.75 SQ mounts into the Pengo Severe Rock Ripper auger head via its 1.75" square shank. That auger mounts through a Pengo auger drive to a skid steer, mini excavator or backhoe quick attach, so the pilot is specified by the auger rather than by the machine.

Fitment Detail Fits Pengo Severe Rock Ripper auger Shank 1.75" square Adapter 1.75SQ adapter part 137203 where required Carriers Skid steer, mini excavator, backhoe (via Pengo auger drive)

Confirm whether your head needs the 137203 adapter before ordering. If you are unsure, contact eskidsteer.com at (866) 757-8337.

RRP 1.75 SQ Pilot Questions, Answered