Arch·Master®: flow channels up to 152 ft deep.
The Arch·Master® portable auger system was designed to create flow channels through bridged and arched material, up to 152 feet (46 m) deep. At just 7′7″ (2.3 m) overall height, it operates under low-headroom conditions. Built for maintenance crews who need a fast, effective do-it-yourself solution.
Drill through bridged and arched material fast: no confined-space entry.
The Arch·Master® was designed to do one thing exceptionally well: create flow channels through bridged, arched, or compacted bulk material inside a silo or bin. When material bridges over the discharge outlet, preventing flow, the Arch·Master® is lowered into the vessel from the roof opening and drills downward through the material to re-establish a flow path. In some cases, this is all that is required to restore full vessel operation. In more severe cases, the flow channel created by the Arch·Master® provides the initial access needed for a Junior 360°® or a Big·Mole turnkey service to complete the cleanout.
The machine was specifically designed for in-plant maintenance crews. Its low overall height of 7′7″ (2.3 m) accommodates facilities with limited headroom above the vessel roof. The high-torque, variable speed power head rapidly drills even hardened material, and HD 3-inch auger sections add in 4-foot increments to reach the full 152-foot drilling depth. Specialty bits are available for any application.
Built for maintenance crews who work alone, often at height, with limited setup time.
Works under low-headroom conditions.
At 7 feet 7 inches (2.3 m) total height, the Arch·Master® fits on top of vessels in facilities with limited clearance above the vessel’s roof. The 28″ × 28″ (71.1 cm × 71.1 cm) base provides a stable working platform without requiring extensive setup space.
Adjust speed to match the material resistance.
The special-duty hydraulic motor provides variable speed drilling from slow for initial penetration of compacted material through full speed once the channel is established. The double-roller chain drive transmits torque reliably throughout the operating range. High-torque head handles even the hardest materials.
Add depth in 4-foot increments with quick-connect hex drive.
HD flights, 3-inch diameter, 4-foot long hex drive auger sections add in increments as the channel deepens. Quick-connect hydraulic fittings throughout the system minimize setup and changeover time. Spring steel drive pins secure each section positively. Custom auger diameters available at additional cost.
Standard bits for most materials. Carbide-tipped for hardened crust.
The Arch·Master® comes with a standard set of fishtail bits and carbide-tipped bits to handle both loose and hardened material. The 3.5-inch carbide-tipped bit penetrates crusted material that would stop a standard steel bit. Custom specialty bits are also available from Mole·Master® for unusual applications.
- 3″ HD flights × 4′ L (7.6 cm × 1.2 m) hex drive auger sections, standard
- 3.5″ (8.9 cm) fishtail bit, general purpose penetration
- 6″ (15.2 cm) fishtail bit, for enlarging wider channels
- 10″ (25.4 cm) fishtail bit, for large-diameter flow channel creation
- 3.5″ (8.9 cm) carbide-tipped bit, hardened crust and compacted mineral material
- Specialty bits available for any application, contact Mole·Master®
Arch·Master®: complete specifications.
7′ 7″ (2.3 m)
Accommodates low headroom clearance above vessel roof. Compact footprint designed for operations where overhead space is limited.
28″ × 28″ (71.1 cm × 71.1 cm)
Square base provides stable support during drilling without requiring anchoring to the vessel or surrounding structure.
152′ (46 m) maximum
Auger sections added in 4-foot increments to achieve full depth. Spring steel drive pins secure each section for reliable torque transfer at maximum depth.
3″ dia. × 4′ L hex drive sections
HD flights. Custom diameters available at additional cost for applications requiring larger channel diameters.
Double-roller chain drive
High-torque, variable speed hydraulic motor. Special-duty motor rated for continuous high-load drilling in dense or hardened material.
10 gallons (38 L)
Larger reservoir than the Junior 360°® (10 gal vs. 5 gal) supports sustained high-torque drilling operations. Quick-connect hydraulic fittings throughout.
Lightweight aluminum
Aluminum construction throughout keeps the unit manageable for manual handling and transport without specialized lifting equipment.
Full weight and dimensional specs
Download the Arch·Master® Technical Data Sheet (PDF) for complete weight, dimensional, and installation specifications.
The Arch·Master® in the Mole·Master® cleaning system.
The Arch·Master® is one tool in a three-tier approach. The right tool depends on the difficulty of the material and the condition of the vessel.
Arch·Master® alone may restore flow.
For vessels with bridged or lightly compacted material, drilling a single flow channel through the arch is often all that is needed. The material above the discharge outlet collapses into the channel and flows out. No further equipment required.
Arch·Master® first, then Junior 360°®.
When bridged material is too hard or extensive for the flow channel alone to solve the problem, the Arch·Master® creates the initial access channel. The Junior 360°® H or Junior 360°® P is then deployed to enlarge the channel and cut wall crust throughout the vessel’s interior.
Big·Mole turnkey service: full cleanout.
When material is severely hardened, when the vessel requires complete emptying, or when neither the Arch·Master® nor the Junior 360°® can address the condition, Mole·Master® deploys the Big·Mole turnkey service. Available in all 50 U.S. states and 35+ countries.
The full Mole·Master® equipment family.
Junior 360°® H
Hydraulic head for maximum torque, the next step after the Arch·Master® for mid-difficulty material.
View Specs
Junior 360°® P
Pneumatic head, no hydraulic fluid at the cutting head. Preferred for food-grade and contamination-sensitive applications.
View Specs
Parts & Downloads
Parts lists for all Junior 360°® serial numbers, Arch·Master® technical data sheet, and user manuals.
View PartsThe Arch·Master® is available to purchase: built for crews who handle this in-house.
Contact Mole·Master® to discuss your vessel type, material, and access configuration. We provide training and technical support with every purchase.