Airtac LSH Linear Guide Rail LSH25F2N2X760S20BP-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25F2N2X760S20BP-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 length760 mm
- AccuracyP — precision 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 LSH25F2N2X760S20BP-M6
LSH25F2N2X760S20BP-M6 is a complete LSH linear guide: one 760 mm profile rail delivered with two bottom-mounting F2 flange carriages already matched to it. Four rows of recirculating balls sit in X-arranged arc raceways at a 45 degree contact angle, two contact points per ball, so load capacity is equal in all four directions and slight mounting-surface error is absorbed inside the carriage rather than turning into bind. Size 25 carries a true rail width of 23 mm - not 25 - so cut the mating seats from that figure.
Every standard-length carriage is rated 26.9 kN dynamic, 39.4 kN static and 0.44 / 0.38 / 0.38 kN.m in MR / MP / My; the two carriages share the duty and hold the table against tipping along the travel. Light preload (B) firms up the ball path over the unpreloaded grade, and precision accuracy places running parallelism in the 3-21 um band over the rail length. At 760 mm the cut sits far below the 4040 mm Lmax for this size, so a longer replacement is available to order if the machine grows.
Airtac LSH Linear Guide Rail LSH25F2N2X760S20BP-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25F2N2X760S20BP-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 | Flange, bottom mounting |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 760 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 | P — precision 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 LSH25F2N2X760S20BP-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. |
| 2X760 | 2 carriages on a 760 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. |
| P | P — precision 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, 760 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 LSH25F2N2X760S20BP-M6 Is Used
Pick-and-place gantry Y-axis
Two F2 carriages under a 760 mm beam carry an indexing gripper head between load and unload stations on an assembly cell, the bottom-flange mounting keeping the beam top face clear for guarding and cable trays.
Fiber laser marking bridge
A marking bridge riding two precision-grade blocks holds the laser beam parallel to the fixture plane, and the light preload keeps lost motion out of fast repeated positioning between part numbers.
Optical comparator stage
Under-mounting on a granite-based optical comparator: the F2 flange bolts from below so the measurement table surface stays uninterrupted, while the P grade supports the 3-21 um parallelism the optics demand.
Is the Airtac LSH Linear Guide Rail LSH25F2N2X760S20BP-M6 the Right Guide?
Step down to AirTAC LRM when the duty is light and the envelope tight - but note LRM publishes no load ratings, so we confirm them by RFQ before you commit. If moment governs your layout, remember the numbers here: 0.44 kN.m MR per carriage; one size up to LSH30 N lifts that to 0.66 kN.m (about 50 percent) while a long LSH25L carriage reaches 0.58 kN.m (about 32 percent) without touching the rail width. Step across to LGC when travel is short and crossed-roller rigidity matters more than long recirculating runs.
Match checklist before you order: form (this is a complete set, rail plus two carriages), size by both load and moment, F2 flange style with standard length, two blocks on one 760 mm rail, P accuracy grade, and light preload. Preload is not free - at 500 mm spacing it narrows the allowable parallelism error from 30 to 22 um and the height error from 130 to 85 um. The M6 grease fitting suits this size family; note the full code for future spares.
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 LSH25F2N2X760S20BP-M6 FAQ
Per carriage: dynamic load rating C 26.9 kN, static C0 39.4 kN, moment ratings MR 0.44, MP 0.38 and My 0.38 kN.m; static is roughly 1.5 times dynamic across the range, but C is what governs travel life. Running parallelism in P grade is 3-21 um depending on rail length. Rail screws are M6 at 1370 N.cm in steel, 921 in cast iron, 686 in aluminium, with mounting shoulders H 6.5, H1 5, H2 5 mm and corner radius max 1 mm. Grease: 3.6 cm3 first charge per standard carriage, 1.1 cm3 top-up, every 100 km of travel or every 3-6 months.
Preload B removes ball-path play for higher rigidity, but it narrows the fit-up window: at 500 mm rail spacing the allowable parallelism error drops from 30 to 22 um and the allowable height error from 130 to 85 um, scaled to your actual spacing. The self-aligning design absorbs only error inside these values - measure the seats before you commit, because pulling the rail flat against its datum and torquing it correctly is what actually delivers the accuracy grade you paid for.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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