Friction Buffer Stop

Product

A fixed track-end safety device absorbing train kinetic energy through friction shoe deformation before a fixed backstop.

Buffer type	Friction shoe with hydraulic damping
Typical installation	End of siding, yard dead-end, test track terminus
Design speed	15–30 km/h impact design speed (varies by standard)
Kinetic energy absorption	50–500 kJ per impact (varies by vehicle mass)
Friction shoe material	Composite, elastomer, or laminated steel/rubber
Shoe travel distance	150–600 mm typical design stroke
Restitution coefficient	<0.1 (highly damped, no bounce)
Hydraulic damper flow	Metered orifice providing smooth load rise
Maximum deceleration	<0.5 g (passenger comfort consideration)
Shoe replacement interval	Every 50–500 impacts depending on design
Standards	EN 15081 (railway buffers and couplers), UIC 235
Direct parts	7
Total parts	35
Class	Product

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Overview

A friction buffer stop is a track-end safety device designed to stop a runaway or over-speed train with minimal passenger discomfort. The friction buffer absorbs the train's kinetic energy by deforming resilient "shoes" sandwiched between the moving train and a fixed end plate. The shoes slide apart with very high friction, dissipating energy as heat, and hydraulic dampers meter the load rise.

How it works

The Base and Guide Frame is bolted to the track bed at the end of the siding or yard lead. The Sliding Rail Frame sits within the frame, with the contact plate at the front and two friction shoes sandwiched on either side.

When a train strikes the buffer head, the train's momentum drives the Sliding Platform backward against the friction and the hydraulic dampers. The Friction Shoe Assembly are compressed between the moving platform and the fixed guides.

The friction material generates a large resistive force proportional to the normal pressure. The hydraulic dampers meter the speed of platform retraction.

Friction Buffer Stop parts and their functions

7 top-level parts · 35 parts in total · full bill of materials below

Friction Buffer Stop parts diagram: 1 base and guide frame, 2 friction shoe assembly, 3 buffer head contact plate, 4 sliding rail frame, 5 hydraulic damper, 6 fixed end barrier, 7 fastening & anchoring kit. 35 parts in 7 top-level items. — Friction Buffer Stop parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Base and Guide Frame 4 parts	1×	Foundation and guide frame
2	Friction Shoe Assembly 3 parts	2×	Left and right friction elements
3	Buffer Head Contact Plate 2 parts	1×	Vehicle contact plate
4	Sliding Rail Frame 3 parts	1×	Load distribution frame
5	Hydraulic Damper 2 parts	2×	Hydraulic dampers
6	Fixed End Barrier 3 parts	1×	Fixed backstop barrier
7	Fastening & Anchoring Kit 1 parts	1×	Bolts and anchoring hardware

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Build & assembly graph

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Bill of materials for Friction Buffer Stop

7 top-level lines · 29 rows shown · 35 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Base and Guide Frame 4 parts	buffer-stop-base-structure	1×	1	6	assembly
1.1	Base Plate	buffer-stop-base-plate	1×	1	·	part
1.2	Side Guide Rail	buffer-stop-side-guide-rail	2×	2	·	part
1.3	Cross Beam	buffer-stop-cross-beam	2×	2	·	part
1.4	Fastener Set	fastener-set	1×	1	·	part
2	Friction Shoe Assembly 3 parts	buffer-stop-friction-shoes	2×	2	5	assembly
2.1	Shoe Backing Plate	buffer-stop-shoe-plate	1×	2	·	part
2.2	Friction Block	buffer-stop-friction-block	1×	2	·	part
2.3	Shoe Attachment Bracket 2 parts	buffer-stop-shoe-attachment	1×	2	3	assembly
2.3.1	Coil Spring	coil-spring	2×	4	·	part
2.3.2	Fastener Set	fastener-set	1×	2	·	part
3	Buffer Head Contact Plate 2 parts	buffer-stop-buffer-head	1×	1	2	assembly
3.1	Head Plate	buffer-stop-head-plate	1×	1	·	part
3.2	Head Bumper	buffer-stop-head-bumper	1×	1	·	part
4	Sliding Rail Frame 3 parts	buffer-stop-sliding-rail-assembly	1×	1	8	assembly
4.1	Sliding Platform	buffer-stop-sliding-platform	1×	1	·	part
4.2	Slide Bearing 2 parts	buffer-stop-slide-bearing	2×	2	3	assembly
4.2.1	Ball Bearing	ball-bearing	2×	4	·	part
4.2.2	Fastener Set	fastener-set	1×	2	·	part
4.3	Fastener Set	fastener-set	1×	1	·	part
5	Hydraulic Damper 2 parts	buffer-stop-shock-absorber	2×	2	2	assembly
5.1	Pressure Sensor	pressure-sensor	1×	2	·	part
5.2	Fastener Set	fastener-set	1×	2	·	part
6	Fixed End Barrier 3 parts	buffer-stop-end-wall	1×	1	3	assembly
6.1	End Wall Plate	buffer-stop-wall-plate	1×	1	·	part
6.2	Wall Bumper	buffer-stop-wall-bumper	1×	1	·	part
6.3	Fastener Set	fastener-set	1×	1	·	part
7	Fastening & Anchoring Kit 1 parts	buffer-stop-fastener-assembly	1×	1	2	assembly
7.1	Fastener Set	fastener-set	2×	2	·	part

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Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500k–$60M. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳CRRC crrcgc.cc ↗	Beijing, CN	Rolling stock & rail systems	made to order	40–72 wks
🇫🇷Alstom alstom.com ↗	Saint-Ouen, FR	Rail rolling stock	made to order	40–72 wks
🇩🇪Siemens Mobility mobility.siemens.com ↗	Munich, DE	Rail systems	made to order	40–72 wks
🇨🇭Stadler Rail stadlerrail.com ↗	Bussnang, CH	Rail rolling stock	made to order	40–72 wks
🇺🇸Wabtec wabteccorp.com ↗	Pittsburgh, US	Rail equipment	made to order	40–72 wks

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