Tender Details

Country: United Kingdom
Summary: Provision of Friction Material for the Brake Blocks Used Across the London Underground Fleet
GBT Ref No: 121486542
Deadline: 11 Aug 2025
Financier: Self Financed
Purchaser Ownership: Government
Tender Value: Refer Document
Notice Type: Tender
Document Ref. No.:
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Description:
All London Underground (LU) passenger rolling stock utilises a tread-brake actuator that applies a friction brake directly to the wheel tread via a brake block to solely provide both emergency and parking brake functions. The service brake function is predominantly fulfilled by the electrodynamic (ED) brake however the implementation and effectiveness of ED braking varies significantly across fleets due to differing braking architectures. In addition, some fleets have a Wheel Slide Protection system that will inhibit the ED to provide braking control via friction only. The current brake block was originally developed in the 1980s and is used on all current LU fleets. This material is not optimised for newer fleets that feature high-capacity ED braking. In LU's modern rolling stock, the ED brake typically handles all the service braking effort above 15 kmph across all axles, below the ED blend out speed the friction brake takes over to bring the train to a stand. Some other trains include "trailer axles" where service braking is achieved solely through friction. Older trains feature lower-capacity ED braking systems, requiring frequent supplementation with friction braking. Recent particulate monitoring studies conducted on the LU network have identified brake block dust as a contributor to airborne particle levels, in particular the PM2.5 particles. There is interest in developing an alternative brake block material that reduces airborne dust emissions. Additionally, brake sq...
Documents:

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Provision of Friction Material for the Brake Blocks Used Across the London Underground Fleet - Uk Tender

The TRANSPORT FOR LONDON, a Government sector organization in United Kingdom, has announced a new tender for Provision of Friction Material for the Brake Blocks Used Across the London Underground Fleet. This tender is published on UkTender under GBT Ref No: 121486542 and is categorized as a Tender. Interested and eligible suppliers are invited to participate by reviewing the tender documents and submitting their bids before the deadline on 2025-08-11.

The estimated tender value is Refer Document, and full details, including technical specifications and submission requirements, are provided in the official tender documents. Ensure all submissions meet the criteria outlined to be considered for evaluation.