Airtac LSH Linear Guide Rail LSH25HN2X370S35BH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HN2X370S35BH-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 lengthStandard carriage
- Carriages2
- Rail length370 mm
- AccuracyH — high grade
- PreloadB — light 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 LSH25HN2X370S35BH-M6
This LSH25HN2X370S35BH-M6 is a complete LSH linear guide set: one 370 mm profile rail with two square (H) standard-length carriages already matched to it. Each carriage runs four rows of recirculating balls in X-shaped arc raceways set at a 45 degree contact angle, so the block carries load and moment equally in all four directions and absorbs slight mounting-surface misalignment instead of binding. Size 25 rails measure 23 mm wide, not 25 mm - lay the mounting surface out from the true width.
The B code means light preload, which raises rigidity at a cost: at 500 mm rail spacing the allowable height error tightens from 130 um to 85 um. Per carriage the ratings are 26.9 kN dynamic, 39.4 kN static, with moment limits of 0.44 / 0.38 / 0.38 kN.m for MR / MP / My. Two blocks on one rail double that and resist tipping along the travel.
Airtac LSH Linear Guide Rail LSH25HN2X370S35BH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HN2X370S35BH-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 | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 370 mm |
| Basic dynamic load rating C | 26.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 39.4 kN per carriage |
| Allowable static moment | MR 0.44 / MP 0.38 / My 0.38 kN·m |
| Accuracy grade | H — high grade |
| Preload grade | B — light 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 LSH25HN2X370S35BH-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. |
| N | Standard carriage. |
| 2X370 | 2 carriages on a 370 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| B | B — light preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| H | H — high 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, 370 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 LSH25HN2X370S35BH-M6 Is Used
Coordinate measuring fixture slide
A 370 mm travel slide carrying a CMM probe or camera over machined housings; light preload keeps the carriage from lagging on direction reversal so readings repeat.
SMT feeder placement axis
Feeding and placing components on a small electronics assembly line, where the 23 mm wide rail keeps the gantry frame slim and preload B holds positioning under repeated stops.
Laser marking shuttle axis
A 370 mm focus or shuttle axis on a laser marking bench; the 26.9 kN per-block rating covers the head mass with margin, and self-alignment forgives a milled, not ground, base.
Is the Airtac LSH Linear Guide Rail LSH25HN2X370S35BH-M6 the Right Guide?
Light preload suits axes that reverse direction often - a short-stroke pick-and-place or a measuring slide - where lost motion matters more than mounting forgiveness. Before you settle on size 25, check the duty both ways: if the load is light and the space tight, an LRM miniature guide may do the job in a smaller envelope (its load ratings are not published, so we confirm them per enquiry); if the travel is short and you need crossed-roller rigidity rather than long recirculating travel, look at LGC instead. One size up to LSH30, or a long (L) carriage, is the move when a cantilevered load makes the moment rating, not C, the deciding number.
Match checklist: complete set, carriage only or rail only; size by load and moment together; carriage style and length; block count and rail length; accuracy grade and preload, remembering preload shrinks the installation tolerance; grease fitting; and the pairing code if you are replacing one part of a pair.
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 LSH25HN2X370S35BH-M6 FAQ
Each standard-length square carriage is rated 26.9 kN basic dynamic (C) and 39.4 kN basic static (C0), with allowable static moments of 0.44 kN.m MR, 0.38 kN.m MP and 0.38 kN.m My; two carriages are fitted. Accuracy is normal grade, so running parallelism over the 370 mm rail falls in the 12 to 37 um band. Rails take M6 screws torqued to 1370 N.cm in steel, 921 N.cm in cast iron or 686 N.cm in aluminium. Each carriage ships pre-filled with 3.6 cm3 of Mobilux EP2; top up 1.1 cm3 every 100 km of travel or every 3 to 6 months.
Light preload removes clearance so the carriage resists deflection and lost motion, but the balls then sit under tension, and mounting error translates straight into ball load. At 500 mm rail spacing the allowable height difference between rails drops from 130 um with no preload to 85 um with B, and the parallelism allowance tightens from 30 um to 22 um. The trade-off scales with your actual spacing. If your base cannot be machined to that, order the A (no preload) version instead.
Authorized Export Seller
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 LSH25HN2X370S35BH-M6
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