Airtac LSH Linear Guide Rail LSH25BK-F2L-N-C-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2L-N-C-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 lengthLong 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-F2L-N-C-M6
An AirTAC LSH25BK-F2L-N-C-M6 is a carriage only: the long bottom-flange block of the LSH25 series, accuracy grade N, with an M6 grease fitting and pairing code C. No rail is included, so this code suits a buyer who already has a sound LSH25 rail and needs the sliding element. The F2 flange bolts the carriage down from below through its base flange, which leaves the whole top face free for the load. Inside, four rows of recirculating balls run in X-shaped 45 degree arc raceways, so the block carries loads and overturning moments equally in all four directions and absorbs slight mounting misalignment instead of binding.
Per carriage, the long LSH25 block is rated 32.9 kN basic dynamic (C) and 53.0 kN basic static (C0), with allowable moments of 0.58 (MR), 0.57 (MP) and 0.57 (My) kN.m. Against the standard-length LSH25 carriage, the long body lifts the dynamic rating about 22 percent but the MR moment about 32 percent, so when the duty is a cantilevered or off-centre load, the extra length is doing most of the work. Size 25 rides on a 23 mm wide rail, not 25 mm, worth checking before you drill a mounting plate.
Airtac LSH Linear Guide Rail LSH25BK-F2L-N-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2L-N-C-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 | Long carriage |
| 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 |
| 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-F2L-N-C-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. |
| L | Long 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-F2L-N-C-M6 Is Used
Flow-wrapper pusher axis rebuild
A horizontal flow-wrapper's product pusher rides on two LSH25 blocks fixed from below, keeping grease ports and top faces clear of product dust. Ordering F2 carriages singly lets the maintenance crew renew worn blocks during a changeover without disturbing a straight 2 m rail.
CNC foam router gantry swap
One Y-axis carriage on a foam-cutting gantry has developed knock after years of dusty service. A single long F2 block with pairing code C restores the axis in minutes, and the 23 mm wide rail, still true, is kept.
Planned shutdown block renewal
During a plant shutdown, a technician swaps four worn long flange carriages on a palletising fixture. The pairing code read from the old blocks, C in this case, is the only identification needed to order exact replacements.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2L-N-C-M6 the Right Guide?
Start from the form: this code buys a carriage only, so it fits a repair or a spare-parts plan, not a new build. Size by load and by moment together; if the duty is light and space is tight, AirTAC LRM is the smaller step, but its load ratings are not published, so send us the duty and we will confirm suitability. When the moment governs and 0.58 kN.m is not enough, one size up to LSH30 lifts MR to 0.66 kN.m for a standard carriage, roughly 50 percent, whereas a second carriage on the same rail addresses tipping along the direction of travel instead. For short travel where crossed-roller rigidity beats long recirculating travel, LGC is the alternative family. Order checklist: carriage only versus complete set, size from load and moment, F2 flange fixing from below, long length, grade N, M6 fitting, and the pairing code, which must read the same on your 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-F2L-N-C-M6 FAQ
For the F2L long block at size 25, basic dynamic load rating C is 32.9 kN and basic static C0 is 53.0 kN per carriage, with allowable static moments MR 0.58, MP 0.57 and My 0.57 kN.m. Running parallelism for N grade over its rail-length bands is 12 to 37 um. The mating rail takes M6 mounting screws torqued to 1370 N.cm in steel, 921 in cast iron or 686 in aluminium. The carriage arrives pre-filled with Mobilux EP2: 4.5 cm3 first charge for the long body, 1.4 cm3 top-up, refreshed every 100 km of travel or every 3 to 6 months. On a 300 mm stroke cycled once per second, 100 km passes in about two weeks of continuous running, so the distance usually binds before the calendar.
No rail is included: LSH25BK-F2L-N-C-M6 is the carriage only, so never order it as a complete linear guide. The final letter is the pairing code, and an LSH carriage will only run as designed on an LSH25 rail carrying the same letter. Carriages and rails of the same LSH25 model are interchangeable among themselves, but this implies nothing about rails from other manufacturers. When replacing a worn block, copy the code from the old carriage or the rail's end marking; if you need rail and carriage together, order the complete-set code instead, which also carries the preload and rail length.
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