Telescopic Rails & Linear Guides for Rail Vehicles

Where telescopic rails and linear guides work in transport

Typical mounting points across the industry — the tag shows which product line does the job.

Telescopic rail

Underfloor equipment slides

Converters, compressors and control boxes ride out on heavy full-extension sets for depot service.

Telescopic rail

Battery & energy modules

Hybrid and EMU battery boxes extracted at full weight for inspection and swap.

Telescopic rail

Seating & interior mechanisms

Partial-extension rails in seat kinematics, tables and folding modules.

Linear guide

Door & step mechanisms

VX and VB ball guides guide sliding steps, door leaves and ramps — robust, quiet and tolerant of mounting errors.

Telescopic rail

On-board catering modules

Galley drawers and trolley garages with locked, vibration-proof travel.

Telescopic rail

Bus & coach equipment

Luggage-bay slides and battery trays for road-based fleets.

What the application demands

The engineering constraints that drive series selection — and how Veltork answers them.

vibration

Decades of vibration

Rail duty means permanent broadband vibration plus shunt shocks. VT-P is designed for shock and intensive cycling; preloaded executions eliminate fretting rattle.

rainy

The underfloor environment

Brake dust, salt spray and washing chemistry attack everything under the car. Zinc-nickel and E-coat finishes with stainless balls keep telescopic rails serviceable between overhauls; linear guides get hard-chrome, nickel or black-oxide coatings or stainless steel, with seals and scrapers.

schedule

Maintenance-window economics

A battery swap has to happen inside the timetable. Full-extension sets bring the module clear of the car body — no crane gymnastics, no disassembly.

Recommended series

Start with these series; the configurators weigh your exact load, stroke and service life against the whole range.

Telescopic rails

VT-H100 %+ ext

Heavy-Duty Full Extension

Heavy underfloor modules and battery boxes: configurable executions F / V / S, sizes 30–80, sized per module and shock spectrum.

Sizes 30–80modular executions F / V / S

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VT-P≈ 50 % ext

Partial Extension

Railway-proven partial extension for seats, doors and interior mechanisms — the shock-duty benchmark of the range.

Sizes 22–63highest telescopic load, per pair

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VT-O100 % ext

Square Full Extension

Closed square profile for torsion-loaded drawers and catering modules, full 100 % extension.

Sizes 22–43torsion-resistant closed profile

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Linear guides

VXBalls · X-arrangement

Ball linear guide, X-arrangement

Door, step and ramp mechanisms: the X-arrangement tolerates mounting errors on car bodies; coated or stainless rails and carriages, sizes 20–35.

Sizes 20–35tolerates mounting errors

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Technical fit

Execution options of both product lines.

Telescopic rails

Working speed

≤ 0.8 m/s (derates with length) · max accel 1.2 m/s²

Surface coatings

Zinc per ISO 2081 (standard) · zinc-nickel · nickel · E-coat on request

Lubrication

Medium lithium grease; re-lube every 100 km or 6 months. FDA, cleanroom, marine & temperature greases on request.

Load basis

Telescopic series per pair of rails · VT-L per carriage

Linear guides

Accuracy · preload

Accuracy N · H · P · SP · UP; preload C0–C3 (roller guides C1–C3, C4 and C5 on request)

Speed · acceleration

VB up to 5 m/s and 500 m/s² · VR 4 m/s, 150 m/s² · VX 2 m/s, 40 m/s²

Sealing

End and bottom seals standard; double seals, metal scrapers, inner seal strips and rail cover strip on request

Corrosion protection

Oiled as standard; hard chrome, black chrome, nickel, black oxide or stainless steel

Load basis

Per carriage; load ratings to ISO 14728

Frequently asked questions

Are the rails suitable for railway shock and vibration requirements?expand_more

The range is engineered for shock and intensive-cycling duty (VT-P explicitly for crash-test applications); we support verification against your shock/vibration category and supply preloaded, rattle-free executions.

How are underfloor slides protected against corrosion?expand_more

Zinc per ISO 2081 standard, upgradeable to zinc-nickel, nickel or E-coat, plus stainless balls and marine greases — chosen per exposure and encoded in the part number.

Can a battery module be extracted fully outside the car body?expand_more

Yes — VT-H heavy-duty sets and VT-X I-beam rails provide 100 %+ extension at full module weight, with capacities quoted per pair of rails.

What about fire-safety requirements (EN 45545)?expand_more

The rails are all-steel with metallic finishes; grease quantities are minimal. We provide material declarations for your EN 45545 assessment on request.

Can linear guides be used for door and step systems?expand_more

Yes — sliding steps, door leaves and ramps run on VX or VB ball guides. Rails and carriages are available hard-chromed, nickel-plated, black-oxidised or in stainless steel; seals and scrapers keep dust out. We help size the guide for your shock and vibration category.

Other industries

Automated Storagearrow_forward Vehicle Equipmentarrow_forward Machine Toolsarrow_forward Electronicsarrow_forward Medical Techarrow_forward Cateringarrow_forward Aerospacearrow_forward Robotics & Handlingarrow_forward

Tell us your application — we return a part number.

Send the payload, stroke and envelope, or let a configurator narrow the range first. Our team returns a sized series, deflection estimate and dimension drawing — prototypes in under 14 days.

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