Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-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 asCarriage / block only
- SizeLSH25
- Rail width23 mm
- Carriage lengthStandard carriage
- AccuracyN — normal grade
- 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 LSH25BK-F2N-N-B-M6
This is the normal-accuracy version of the AirTAC size 25 bottom-flange carriage: one F2 block, standard length, M6 nipple, pairing code B, and no rail anywhere in the order. Where the H grade holds running parallelism to 7-28 um, this N grade spans 12-37 um - a band that most machine frames, conveyors and handling structures cannot exploit anyway, which is why it prices lower. Four rows of balls circulate through 45 degree X-pattern arc raceways, two-point contact per ball, equal capacity in every direction, self-aligning within the catalogue's modest installation tolerances.
Ratings are identical to the higher grades because they come from the geometry, not the finish: 26.9 kN dynamic and 39.4 kN static per block, MR 0.44 kN.m, MP and My 0.38 kN.m. For a worn carriage on a general-duty machine, a carriage swap runs to roughly a quarter of a complete set's price - usually the economic repair, provided the 23 mm rail is undamaged and the pairing letter is known.
Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Carriage / block only |
| 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 |
| 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 | N — normal grade |
| 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, matched by the pairing code |
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. This item is a carriage only. Order a complete set if you also need a rail.
Model Code: Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| BK | Carriage / block only — no rail supplied. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| N | N — normal grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -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 | Carriage / block only |
|---|---|
| Rail | No — not supplied with this item |
| Carriage | Yes, one |
This is a carriage on its own. NO RAIL IS INCLUDED. 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 LSH25BK-F2N-N-B-M6 Is Used
AS/RS shuttle car guide
An automatic storage shuttle or transfer car running on 25 mm rails sees shock loads rather than sub-micron precision demands; a normal-grade block coded B keeps spare-part cost down across a fleet.
Aluminium saw pusher refurbishment
Cutting-line pushers on aluminium saws take heavy side loads; fitting a fresh N-grade block restores the 39.4 kN static margin after a crash, often without changing the rail.
Textile winder traverse guide
Looms and winders cycle their guides millions of times at modest precision demands; a normal-grade carriage replacement keeps both downtime and part cost low.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2N-N-B-M6 the Right Guide?
Pick N grade when the machine's frame accuracy, not the guide, sets the limit; keep H or P for metrology and precision stages. If the duty is light and compact, LRM may be the better fit - its load ratings are not published, so we confirm them for you before ordering. Moment-heavy cantilevers argue for the long LSH25 block (MR 0.58 kN.m) or one size up; short travel that needs crossed-roller rigidity calls for LGC instead.
Checklist before you buy: carriage only, no rail; size 25 sized on load and moment together; F2 flange, bolts from below; standard length; one block; accuracy N; M6 fitting; pairing code B read from the original rail.
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 LSH25BK-F2N-N-B-M6 FAQ
C 26.9 kN dynamic, C0 39.4 kN static, moments MR 0.44, MP 0.38 and My 0.38 kN.m. N-grade running parallelism 12-37 um across the rail length bands. Rail screws M6 at 1370 N.cm (steel), 921 (cast iron), 686 (aluminium). Grease: 3.6 cm3 charge, 1.1 cm3 top-up, every 100 km of travel or every 3 to 6 months, Mobilux EP2 or equivalent.
Only the carriage. The rail is a separate SKU and must also be coded B for the two to run together; read the letter off the rail end, the end cap label or the original box. Within LSH25 of this model, any block fits any rail of the same pairing code with its smoothness and accuracy intact - that interchangeability does not extend to other manufacturers' rails.
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 LSH25BK-F2N-N-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.