BoRH Auger Tooth Kit | Pengo Attachments By Paladin

Overview

This Pengo rock auger bit conversion — the patented BoRH (Bolt-on Rock Head) — turns a standard Aggressor dirt auger into a rock auger without buying a second auger. Six sizes cover 6" to 24", from 24 lb with 8 teeth to 79 lb with 20 teeth, rated by Pengo for soil conditions 5 and 6 — gravel and fracturable rock. The head bolts quickly to the head of an Aggressor auger, so the machine mount behind it does not change.

Key Features of the Pengo BoRH Bolt On Rock Head

• Converts a standard Aggressor dirt auger into a rock auger, eliminating the need for an additional dedicated rock auger.
• Bolt-on head attaches quickly to the head of the Aggressor auger — no welding, no new drive.
• Complete kit: boring head, pilot bit, wear caps, bullet-style carbide teeth and all hardware needed to complete the installation.
• Innovative wear caps and enlarged tooth shoulders for increased wear protection.
• US Patent 7,669,673 — this is Pengo's patented design, not a generic rock head.
• Six sizes, 6" to 24", with 8 to 20 teeth depending on diameter.
• A heavy duty rock auger bit without a heavy duty purchase — the BoRH kit upgrades the auger you own rather than replacing it.

Why Convert Dirt Auger to Rock Auger Rather Than Buy a Second One

• One auger, two jobs. A dedicated rock auger sits idle whenever the ground is soft; a bolt-on head converts the auger you already own.
• Change on site. The head bolts to the Aggressor head, so switching from dirt to rock is a field job rather than a trip back to the yard.
• Everything needed is in the kit. Boring head, pilot, wear caps, carbide teeth and hardware — nothing to source separately.
• Rated where a dirt auger stops. Soil 5–6 is gravel and fracturable rock, well past the 1–3 range the standard Aggressor is built for.
• An auger rock bit that keeps your drive. Because the rock bit for auger conversion happens at the head, the drive, hub and machine mount are all unchanged.

Pengo BoRH Rock Head Specifications

Model Part number Diameter No. of teeth Weight 6-BORH 137991 6" 8 24 lbs 9-BORH 137992 9" 10 36 lbs 12-BORH 137993 12" 12 43 lbs 15-BORH 137994 15" 14 47 lbs 18-BORH 137995 18" 16 56 lbs 24-BORH 137996 24" 20 79 lbs

Which Rock Auger Bit Size Do You Need?

Match the BoRH to the Aggressor auger it will convert — a 12" rock head goes on a 12" auger. Tooth count rises with diameter, from 8 teeth on the 6" head to 20 on the 24", and weight roughly triples across that range. Because the head adds weight to the auger, check what your machine carries before converting the largest diameters. The teeth are bullet-style carbide rather than the standard Pengo auger teeth used in dirt.

What the BoRH Fits

The BoRH bolts to the head of a Pengo Aggressor auger, which itself mounts to a skid steer, mini excavator or backhoe through a Pengo auger drive. Because the conversion happens at the auger head, the machine quick attach and drive are unchanged.

Fitment Detail Fits Pengo Aggressor augers, matched by diameter Attachment Bolt-on to the auger head Carriers Skid steer, mini excavator, backhoe (via Pengo auger drive) Soil rating 5 – 6 (gravel, fracturable rock)

Confirm your Aggressor auger diameter before ordering. If you are unsure, contact eskidsteer.com at (866) 757-8337.

The BoRH System — What Goes With It

The kit arrives complete, but the teeth are consumables. The P21 RR carbide tooth is the bullet-style tooth designed exclusively for the BoRH, and the C123 puller is the tool that removes it. The head itself bolts to an Aggressor auger, which in dirt runs 40/50 teeth and a TriFlow 350 pilot instead.

BoRH Rock Head Questions, Answered