Airtac LSH Linear Guide Rail LSH25BK-F2L-H-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2L-H-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 lengthLong carriage
- AccuracyH — high 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-H-B-M6
This listing covers the carriage alone: an AirTAC LSH25BK-F2L-H-B-M6, a long-bodied bottom-flange (F2) block for size 25 LSH rail, pairing code B, with no rail included. Bolting happens from below through the bottom flange, so the top of the carriage stays completely clear for the load platform - useful where a worktable or bracket needs an unbroken surface. The longer body carries more balls, and the same four-row 45 degree X-raceway geometry as every LSH block keeps capacity equal in all four directions while absorbing slight mounting-surface error. The rail it matches is 23 mm wide, not the 25 the size code suggests.
Going long pays most in moment: MR rises to 0.58 kN.m against 0.44 kN.m for the standard carriage, about 32 percent more, while dynamic rating moves from 26.9 to 32.9 kN, about 22 percent - so a cantilevered load usually justifies the long body before the raw load does. Static rating is 53.0 kN, and MP and My sit at 0.57 kN.m each. Accuracy is high (H), which pairs with rails showing 7 to 28 um running parallelism by length band. Grease first charge is 4.5 cm3 with 1.4 cm3 top-ups for the long body.
Airtac LSH Linear Guide Rail LSH25BK-F2L-H-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2L-H-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 | 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 | H — high 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-H-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. |
| L | Long carriage. |
| H | H — high 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-H-B-M6 Is Used
Cantilevered camera boom
A camera boom reaching out over a conveyor on a sorting line tips the carriage constantly; the 0.58 kN.m MR of the long body absorbs what would push a standard-length block toward its limit.
Modular gantry upgrade
Bolted from below through the F2 flange, this carriage gives a modular gantry deck a clean top surface for fixtures, with H-grade smoothness over the full module stroke.
Case-loader pusher arm
A pusher arm that extends past the carriage on a case-loading conveyor creates a moment arm; the long carriage plus 53.0 kN static rating takes the dwelt load at end of stroke.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2L-H-B-M6 the Right Guide?
If your load hangs off the carriage - a spindle, a gripper, a camera boom - let the moment rating choose before the dynamic one; here the long F2 body buys 0.58 kN.m of MR, a third more than the standard length, for one part. When a lighter, tighter duty appears, LRM steps down, and because its load ratings are not published we confirm them by enquiry; for short travel where crossed-roller stiffness beats long recirculating runs, LGC steps across. This is a part-only purchase: check the pairing letter on your rail is B. Full checklist: form (carriage only), size by load and moment, carriage style and length, carriage count and rail length, accuracy grade with the installation care tighter grades demand, grease fitting (M6 family for size 25), and pairing code B.
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-H-B-M6 FAQ
Per long carriage: basic dynamic load C 32.9 kN, basic static C0 53.0 kN, allowable static moments MR 0.58 kN.m, MP 0.57 kN.m, My 0.57 kN.m. The H accuracy grade pairs with rails at 7 to 28 um running parallelism across the length bands. Rail screws are M6 at 1370/921/686 N.cm for steel/cast iron/aluminium. Grease: 4.5 cm3 first charge and 1.4 cm3 per top-up for the long body, refreshed every 100 km of travel or every 3 to 6 months with Mobilux EP2 or an equivalent.
No rail is included. The code LSH25BK-F2L-H-B-M6 describes one bottom-flange long carriage in size 25, high accuracy, with pairing code B. To buy a match, order an LSH25 rail that carries the same pairing letter B and an accuracy grade suited to the job - H grade rails run at 7 to 28 um parallelism. Carriages stay interchangeable within the model, so this block will keep its smoothness and accuracy on any matching LSH25 rail.
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-F2L-H-B-M6
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