Auger Carbide Tooth BoRH P21RR | Pengo Attachments By Paladin

Overview

These Pengo rock auger bullet teeth — the P21 RR conical tooth, stocked as PG-137990 — are designed exclusively for the Pengo BoRH bolt-on rock head. Each tooth weighs 0.59 lb and carries Pengo soil rating 5 and 6, gravel and fracturable rock. The stout design works well in hard rock and concrete, and an enlarged tooth shoulder protects the head it mounts into rather than the machine quick attach behind it.

Key Features of the Pengo P21 RR Rock Auger Bullet Teeth

• Designed exclusively for the Pengo BoRH, the bolt-on rock head that converts an Aggressor dirt auger into a rock auger.
• Stout conical design works well in hard rock and concrete — the two materials that destroy standard dirt teeth.
• Enlarged tooth shoulder protects the BoRH head from wear, so the consumable takes the damage instead of the casting.
• Pengo soil rating 5–6: gravel and fracturable rock.
• 0.59 lb per tooth — a genuine Pengo carbide conical tooth, not an aftermarket bullet tooth.
• Removed with the C123 puller, so replacement is a tool-assisted field job.
• A carbide conical auger tooth built for one job — this is the BoRH carbide tooth, not a general-purpose bullet tooth auger part.
• Genuine Pengo auger teeth ordered by part number, so shoulder geometry and fit are correct by design.

Why the Right Bullet Tooth Matters in Rock

• Rock destroys the wrong tooth quickly. A dirt tooth at rating 1-3 has no business in gravel; the P21 RR is rated 5-6 for exactly that ground.
• The shoulder protects the head. Enlarged shoulders mean wear lands on a cheap consumable rather than the BoRH casting.
• Matched to the head, not generic. These are built for the BoRH specifically, so fit and shoulder geometry are correct by design.
• Changing teeth is a field job. With a C123 puller a worn set comes off on site rather than back at the yard.
• A rock auger carbide tooth costs a fraction of the head. Replacing teeth on schedule is what keeps the BoRH casting serviceable.

Pengo P21 RR Tooth Specifications

Specification Detail Stocked part number PG-137990 Pengo item P21 RR conical tooth Weight 0.59 lb Pengo soil rating 5 – 6 (gravel, fracturable rock) Designed for Pengo BoRH bolt-on rock head Removal tool C123 puller Design Conical bullet tooth with enlarged shoulder

The BoRH Wear System

This tooth is one part of a system. It fits the BoRH bolt-on rock head, which bolts to an Aggressor auger to convert it from dirt to rock. When the teeth wear, the C123 puller is the tool that removes them. In dirt the same auger runs 40/50 teeth instead, which are rated 1-3 rather than 5-6.

What These Teeth Fit

The P21 RR mounts into the Pengo BoRH rock head, not directly to a machine. The BoRH in turn bolts to a Pengo Aggressor auger, which mounts through a Pengo auger drive to a skid steer, mini excavator or backhoe quick attach. Fitment therefore follows the rock head, not the loader.

Fitment Detail Fits Pengo BoRH bolt-on rock head Head fits Pengo Aggressor augers, 6"–24" Carriers Skid steer, mini excavator, backhoe (via Pengo auger drive) Teeth per head 8 to 20 depending on BoRH diameter

Tooth count varies by head size — 8 on a 6" BoRH up to 20 on a 24". Order a full set rather than singles if the head is due a change. If you are unsure, contact eskidsteer.com at (866) 757-8337.

P21 RR Tooth Questions, Answered