Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 is a standard-type profile linear guide on a 23 mm wide rail. Four rows of balls contact X-shaped raceways at a 45° angle, so the guide carries load equally in all four directions and absorbs small mounting errors inside the carriage instead of binding.
- SeriesLSH
- Supplied asComplete guide set
- SizeLSH25
- Rail width23 mm
- Carriage lengthLong carriage
- Carriages2
- Rail length840 mm
- AccuracyN — normal grade
- PreloadC — medium preload
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6
A complete matched set in the LSH series: an 840 mm rail of true 23 mm width (the size 25 code is not the width) carrying two long square carriages, with M6 lubrication fittings, accuracy grade N and medium preload C. Four rows of recirculating balls bear on X-shaped arc raceways at 45 degrees with two contact points per ball, giving equal capacity radially, laterally and inverted, plus self-alignment that soaks up small errors in the mounting face instead of turning them into binding.
On an 840 mm rail, two long carriages spaced apart are the practical answer to tipping: each carries C 32.9 kN, C0 53.0 kN and moment ratings of MR 0.58, MP 0.57, My 0.57 kN.m, and the pair resists rocking along the travel in a way a single centred block cannot. Grade C preload suits a compact axis like this because short strokes mean constant direction changes - just budget for the tighter fit-up, with allowable height error between rails at 70 um per 500 mm spacing against 130 um for an unloaded set.
Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Complete guide set |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH25 |
| Rail width | 23 mm (the size code is not the rail width above size 20) |
| Carriage style | Square (compact) |
| Carriage length | Long carriage |
| Carriages supplied | 2 |
| Rail length | 840 mm |
| Basic dynamic load rating C | 32.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 53.0 kN per carriage |
| Allowable static moment | MR 0.58 / MP 0.57 / My 0.57 kN·m |
| Accuracy grade | N — normal grade |
| Preload grade | C — medium preload |
| Mounting screws | M6 — 1370 N·cm into steel, 921 cast iron, 686 aluminium |
| Lubrication | Pre-filled with Mobilux EP2; re-grease every 100 km of travel or every 3–6 months |
| Interchangeability | LSH carriages fit LSH rails of the same model |
Specifications follow the official AirTAC LSH catalogue. The catalogue page does not state the carriage or rail base material. Sizes 35 and 45 exist in the catalogue but are not stocked here; they are available to order.
Model Code: Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| L | Long carriage. |
| 2X840 | 2 carriages on a 840 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| C | C — medium preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| N | N — normal grade. |
| -M4 / -M6 / -A01… | Grease nipple or tube-fitting type. Restricted by size: size 15 the M4 family, 20–35 the M6 family, 45 the PT1/8 family. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 840 mm |
| Carriage | Yes, 2 |
Rail and carriage(s) supplied together, matched as a set. If you are not sure which form you need, send us the machine or the original part number and we will confirm it before you order.
Where the Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 Is Used
Belt-line divert and pusher slide
A pusher indexing cartons off a conveyor runs a short reversing stroke all day; grade C preload removes the direction-change knock and the two spaced blocks stop the pusher arm from racking.
Compact pick-and-place module
An 840 mm X-axis under a vacuum gripper in a small assembly cell gains moment headroom from the long carriages without moving up to size 30 and its wider 28 mm rail footprint.
OEM servo slide for a test rig
A machine builder specifying a repeatable 840 mm feed axis for an end-of-line tester pairs grade N accuracy with C preload to hold position through thousands of reversals per shift.
Is the Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 the Right Guide?
At 840 mm this rail sits far inside the 4040 mm single-rail maximum for size 25, so a different length remains an easy order later - LSH carriages are interchangeable between rails of the same model and keep their preload and smoothness. Size the axis by moment first: the long carriage's 0.58 kN.m MR is about a third more than a standard LSH25 block's 0.44, and note that static C0 runs near 1.6 times the dynamic rating here, so a crash or dropped load hits C0 first while travel life is governed by C. For lighter duties in a tighter envelope step down to LRM (ratings unpublished - we confirm them by enquiry); for very short travel needing crossed-roller stiffness step across to LGC. Checklist: form (set, both carriages included), size 25, style H and length L, count 2 on an 840 mm rail, grade N with preload C and its 20 um parallelism allowance, M6 fitting, and M6 mounting screws at 1370 N.cm into steel.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Worst-case moment, not just straight load
- ✓ Travel length and mounting space
- ✓ Accuracy grade and preload
- ✓ Mounting surface ground or finish-milled
- ✓ Pairing code, if replacing a part
Installation & Maintenance Notes
- check Mounting surface must be ground or finish-milled.
- check Torque the rail screws per the recommended figures, in sequence.
- check Keep the mounting corner radius inside the stated R maximum.
- check Do not angle the carriage onto the rail; balls can drop out.
- check Drive the supplied bolt caps into the mounting holes.
- check Re-grease every 100 km of travel or every 3–6 months.
- check Installation by qualified personnel per AirTAC docs.
Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6 FAQ
Each long carriage: C 32.9 kN dynamic, C0 53.0 kN static, moments MR 0.58, MP 0.57, My 0.57 kN.m. Grade N running parallelism spans 12-37 um depending on rail length. Bolt the rail with M6 screws at 1370 N.cm on steel, 921 on cast iron, 686 on aluminium, and keep corner radii at 1 mm or less. First grease charge is about 4.5 cm3 per long carriage, top-up 1.4 cm3 through the M6 fitting every 100 km of travel or 3 to 6 months, whichever comes first.
One 840 mm rail with the two long square carriages mounted and pre-filled with Mobilux EP2, plus the bolt caps for the mounting holes. It is a complete guide set, not a part-only code, so no pairing code applies. Drive every cap fully into its counterbore - lay a flat plate over the cap and tap vertically with a plastic mallet, then clean the rail - because a proud cap or an open hole lets swarf into the ball circuit.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LSH Linear Guide Rail LSH25HL2X840S30CN-M6
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