Airtac LSH Linear Guide Rail LSH25BK-F2L-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2L-H-D-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-D-M6
Ordering LSH25BK-F2L-H-D gets you one AirTAC bottom-flange long carriage for size 25 rail, high accuracy grade, code D, with an M6 nipple - and nothing else. The rail is a separate line item and must carry the same pairing letter. Inside, four ball rows run in opposing 45 degree arc grooves, two contact points per ball, giving the block equal capacity in every direction and letting it absorb small mounting-surface errors rather than fight them. A size 25 rail measures 23 mm wide across its running face.
The per-carriage ratings are C 32.9 kN dynamic and C0 53.0 kN static, with moments of 0.58 / 0.57 / 0.57 kN.m around MR, MP and My. Static sits at roughly 1.6 times dynamic here, as it does across the whole family - but size travel life on C, not on the larger C0. A worn block swapped onto a sound rail typically costs about a quarter of a complete new set, which is why the pairing letter in your original part number is worth recording the day the machine is commissioned.
Airtac LSH Linear Guide Rail LSH25BK-F2L-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2L-H-D-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-D-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-D-M6 Is Used
Weekend changeover on a tray packer
A food plant schedules the swap for a weekend window: replace the worn carriage, keep the sound rail, machine runs Monday morning.
Metrology stage refresh
Renewing the carriage on a granite measuring table's X-axis; the high accuracy grade preserves 7-28 um running parallelism with the matched rail.
Modular fixture column repair
A clamping column on a machining fixture rides a size 25 rail; one new code-D block restores the slide without disturbing the fixture datum.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2L-H-D-M6 the Right Guide?
When an axis has lost its smoothness but the rail still runs true and shows no flaking, a single replacement block is the economical path - carriages price at roughly a quarter of a full set. Match letter D between rail and block; otherwise the pair's running character will not carry over. For heavier cantilever loads step up to an LSH30 long carriage (C 45.7 kN, MR 0.88 kN.m); for small, light envelopes the LRM family is the step down, with ratings we confirm rather than quote; for short-stroke precision work needing roller stiffness, LGC crossed rollers are the cross-wise option.
Order checklist: carriage only - no rail; size 25; F2 bottom-flange, long body; accuracy high; M6 fitting; pairing code D. If the original code is lost, send us the machine details and we will help identify it.
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-D-M6 FAQ
Load ratings per block: C 32.9 kN and C0 53.0 kN; moments 0.58 kN.m (MR), 0.57 kN.m (MP) and 0.57 kN.m (My). Accuracy grade H gives 7 to 28 um running parallelism, varying with rail length. Fix the rail with M6 screws at 1370 N.cm (steel), 921 N.cm (cast iron) or 686 N.cm (aluminium). Lubrication is Mobilux EP2: 4.5 cm3 on fitting, 1.4 cm3 per top-up, due every 100 km travelled or every 3 to 6 months.
The box holds one F2 long carriage for size 25 rail, high accuracy, with an M6 fitting - no rail is part of this listing. Rails and carriages share a pairing letter, D for this SKU; a rail with a different letter is not a matched partner even though it is the same size. To replace a worn block, read the letter from the original part number and order a carriage ending in the same code. Any LSH25 carriage fits any LSH25 rail of the matching code and keeps its smoothness and accuracy.
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-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.