“500,000 units over 50 years with less than 1% failure.”

The Ultimate Conveyor Roller Sealing System

The Brockway SandBloc sealing system offers the ultimate in bearing protection and total peace of mind. The system has been developed over the last 50 years and has been operating with supreme efficiency in abrasive, dusty environments of extreme temperatures. The SandBloc five-part multi-labyrinth sealing system protects against ingress from the smallest of particles in the most hostile of environments. The SandBloc system is fitted as standard in both EnduraRoll and ProtectaRoll.

Unique Sealing System

Unique Sealing System

The SandBloc system is unique to Brockway Conveyors and incorporates a zinc-plated steel multi-labyrinth seal located within a cast iron bearing housing. Additional protection is provided on EnduraRoll by a polyurethane dust cap.
Tried and Tested

Tried and Tested

With a proven track record, we have examples of idlers fitted with the SandBloc Sealing System still in operation today after 40 years continuous use.

“The SandBloc system is fitted as standard in both EnduraRoll and ProtectaRoll.”


  • Quarrying
  • Biomass Energy
  • Shipside Operations
  • Cement and Gravel
  • Steel Works & Mining
  • Power Generation
  • Ship Discharge of Materials
  • Dredging
  • Sugar Refining
  • Fertiliser
  • Food Industries
  • Bulk Material Handling

All our conveyor products are subjected to a comprehensive ISO 9001 Quality Inspection and are covered by a full 2 year warranty, subject to design specification and usage.