Airtac LSH Linear Guide Rail LSH25BK-F1N-N-E-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1N-N-E-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-F1N-N-E-M6
One block, no rail: this listing is the AirTAC LSH25 carriage in top-flange F1 form, standard length, normal accuracy, M6 fitting, ready to mate with any LSH25 rail lettered E. Balls recirculate through four rows of X-angled raceways set at 45 degrees, contacting at two points each - the reason the block pushes equally hard in all four directions and flexes slightly, inside itself, to forgive minor errors in the surface you bolt it to. True rail width at size 25 is 23 mm, not the 25 the size code suggests.
Rated 26.9 kN dynamic and 39.4 kN static per block, with moment limits of 0.44/0.38/0.38 kN.m for MR/MP/My. Self-alignment has a ceiling: it covers slight errors within the catalogue's per-size and per-preload allowances, not sloppy machining. And achieved accuracy depends heavily on whether the rail is pulled flat against its datum face and torqued correctly - a sound block on a badly seated rail loses precision that no amount of ball geometry recovers.
Airtac LSH Linear Guide Rail LSH25BK-F1N-N-E-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1N-N-E-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, top 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-F1N-N-E-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-F1N-N-E-M6 Is Used
Router table Y-axis
A workshop CNC router's moving table riding on 23 mm rails takes this spare block when dust ingestion roughens the travel; standard wipers plus a fresh 3.6 cm3 grease charge bring the cut finish back.
Dough-sheeting line guide
In a bakery's sheeter, the cutter carriage glides on size 25 rails; a replacement E-coded block keeps washdown-day servicing simple through the accessible M6 fitting.
Test rig cam sled
An automotive test bench's programmable cam sled loses its stick-slip after a worn block is swapped out, the four-row ball geometry re-centering itself under the actuator shaft.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1N-N-E-M6 the Right Guide?
Because any LSH carriage block of a given model fits any rail of that same model and keeps its smoothness, a worn block need not take the whole guide with it. This E-coded block bolts onto the existing rail at about a quarter of a complete set's price, provided the rail raceways pass a finger check for fluting and pitting. Confirm the letter E on the rail end or packing slip first; a mismatched letter still slides on but will not deliver its rated preload.
Lighter loads in tighter spaces point down to AirTAC LRM, whose ratings are unpublished - we confirm them for you. Short, stiff strokes favour LGC's crossed rollers. Long overhangs favour the long block, MR 0.58 kN.m against 0.44 standard. Then run the checklist: form (carriage only), load and moment, flange pattern, length, count, rail length, accuracy grade, the preload-versus-mounting-tolerance trade-off, M6 fitting, pairing letter E.
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-F1N-N-E-M6 FAQ
Say: LSH25, F1 top flange, standard length, N accuracy, pairing E, M6 fitting. Ratings per block: 26.9 kN dynamic C, 39.4 kN static C0, moments 0.44/0.38/0.38 kN.m MR/MP/My, parallelism band 12-37 um for N grade. Mounting M6 screws at 1370, 921 and 686 N.cm for steel, cast iron and aluminium. Grease 3.6 cm3 fill, 1.1 cm3 top-up, interval 100 km of travel or 3 to 6 months.
Physically it would slide on, but pairing letters exist so a replacement block keeps the original smoothness, preload and accuracy - the letter must match, E with E. The box holds one carriage block only: no rail, no fixing screws, standard wipers only. Flange blocks like this F1 should not carry a side-mounted nipple because the fitting can foul the body, which is why the M6 position is chosen to clear the flange.
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-F1N-N-E-M6
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