Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-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 length1850 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 LSH25HL2X1850S25CN-M6
Order code LSH25HL2X1850S25CN-M6 buys a complete, mount-ready AirTAC LSH guide: a 1850 mm rail with hole centres starting 25 mm from each end, carrying two long square carriages. Carriage and rail are made as one system and stay interchangeable across the LSH25 family. In each block, four ball rows meet X-oriented arc raceways at 45 degrees with two contact points per ball - equal load sharing in radial, reverse-radial and both lateral directions, plus self-alignment that absorbs slight mounting error within stated limits rather than locking up. The rail is 23 mm wide despite the 25 in the code; set out your bed at 23 mm.
Per long carriage this is 32.9 kN dynamic and 53.0 kN static, with 0.58 / 0.57 / 0.57 kN.m of moment rating. A machine-economy point worth knowing: a replacement carriage alone lists at roughly a quarter of a complete set's price, so a well-kept rail on a sensible length keeps future repairs cheap. Preload C gives a firm system - expect 20 um of parallelism and 70 um of height tolerance at 500 mm spacing, the tightest of the three preload grades - so this set belongs on a properly machined and torqued base where the added rigidity pays for itself.
Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-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 | 1850 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 LSH25HL2X1850S25CN-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. |
| 2X1850 | 2 carriages on a 1850 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, 1850 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 LSH25HL2X1850S25CN-M6 Is Used
Mill X-axis retrofit
Converting a manual knee mill's table to linear guides over a 1850 mm bed: two long carriages under the table fight the overhung moment of a heavy workpiece clamped at one end, and preload C damps the stick-slip a worn dovetail used to give.
Case packer pusher arm
A secondary-packaging machine that squares and pushes carton rows across a 1850 mm stroke: the long blocks carry the side thrust of misaligned cases, and a worn carriage can later be replaced on its own at about a quarter of set price.
Weld seam scanner carriage
A non-destructive testing scanner tracking a 1850 mm weld seam on large pipework: N-grade parallelism of 12-37 um is sufficient for the probe, and the M6 fitting allows quick relubrication between shifts in a hot fabrication bay.
Is the Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-M6 the Right Guide?
Run the sizing both ways. Down: light duty in a cramped envelope suggests LRM, whose load ratings are unpublished - tell us the duty and we confirm them before you redesign. Up: if your cantilever load exceeds the long block's 0.58 kN.m, step to LSH30 rather than adding carriage count, since one size up buys moment capacity faster than a second carriage solves tipping along the rail; and for short travel where crossed-roller rigidity matters more than long recirculating motion, LGC is the series to compare. Ordering checklist for this exact code: complete set form; size 25 verified on load and moment; two long square carriages; 1850 mm rail with 25 mm end offset; N accuracy; preload C and its 20 um / 70 um installation window; M6 fitting; matched set, so no pairing code is needed at order time.
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 LSH25HL2X1850S25CN-M6 FAQ
Dynamic C 32.9 kN and static C0 53.0 kN per long carriage; moments MR 0.58 / MP 0.57 / My 0.57 kN.m; N-grade running parallelism 12-37 um by rail length; M6 mounting screws torqued to 1370 / 921 / 686 N.cm into steel, cast iron and aluminium respectively; grease Mobilux EP2 or equivalent, 4.5 cm3 first charge and 1.4 cm3 top-up per long carriage, repeated every 100 km of travel or every 3-6 months.
It depends on your base. Preload C stiffens the carriage and removes play, but on LSH25 it cuts the allowable height error to 70 um and parallelism to 20 um at 500 mm spacing, against 130 um and 30 um with no preload - a large tightening for the same part. The values scale with actual spacing, and self-alignment only absorbs error inside them. Machine the seats, keep the corner radius at or under 1 mm, pull the rail onto its datum face and torque all M6 screws; for a rough welded base, order the A or B preload variant instead.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LSH Linear Guide Rail LSH25HL2X1850S25CN-M6
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