Airtac LSH Linear Guide Rail LSH25BK-F1L-H-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1L-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-F1L-H-B-M6
This is the carriage half of an LSH25 linear guide: a single top-flange (F1) block in the long body, high accuracy grade, with an M6 grease fitting and pairing code B. NO RAIL IS INCLUDED. It rides an LSH25 rail that is 23 mm wide - note the size number and the true rail width differ by 2 mm at this size, so lay out the mounting surface from the datasheet, not from the code. Inside, four rows of recirculating balls run in X-shaped 45 degree arc raceways, giving equal capacity in all four directions and letting the block absorb slight mounting-surface error instead of binding.
Ratings are per carriage: 32.9 kN dynamic (C), 53.0 kN static (C0), and allowable moments of 0.58 / 0.57 / 0.57 kN.m for MR, MP and My. The long body is why those moment numbers look the way they do: against the standard LSH25 block, the L length lifts the dynamic rating about 22 percent but the MR moment rating about 32 percent, so a cantilevered or overhung load gains more than a straight one. The block is supplied pre-filled with Mobilux EP2; first charge 4.5 cm3, top-up 1.4 cm3. A side-mounted fitting on a flange carriage can foul - check clearance before mounting.
Airtac LSH Linear Guide Rail LSH25BK-F1L-H-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1L-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, top 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-F1L-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-F1L-H-B-M6 Is Used
Filling-head dosing slide service
A top-flange block bolts down from above, so a worn carriage on a dosing head slide can be swapped without disturbing rail alignment or the pipework above it.
Case-packer pusher changeover
Keeping one spare long carriage lets a distribution centre swap a worn pusher block during a shift change instead of replacing the whole guide.
Pipetting axis moment upgrade
Moving an auto-analyser dispense head further out on a cantilever: the long body 0.58 kN.m MR rating covers the extra overhang where a standard block would not.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1L-H-B-M6 the Right Guide?
As a replacement, a carriage alone usually costs about a quarter of a complete set, so if the rail is sound and unscored, swapping the block is the economic repair - provided you read the pairing code off the original and match it; this one is B. For sizing: LRM suits lighter duties in a smaller envelope (its load ratings are not published, so we confirm them), LGC suits short travel where crossed-roller rigidity beats long recirculating travel, and if the moment figure is marginal, one size up to LSH30 - a 28 mm rail whose standard block raises MR to 0.66 kN.m - or a second block on the same rail both work. Checklist: carriage only form, F1 top-flange, long body, H grade, M6 fitting, code B 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-F1L-H-B-M6 FAQ
Per carriage: dynamic C 32.9 kN, static C0 53.0 kN, allowable moments MR 0.58, MP 0.57, My 0.57 kN.m. Accuracy grade H: 7-28 um running parallelism band. Lubrication: 4.5 cm3 first charge, 1.4 cm3 top-up, re-grease every 100 km of travel or every 3 to 6 months through the M6 fitting, using Mobilux EP2 or equivalent. The mating LSH25 rail takes M6 screws at 1370 / 921 / 686 N.cm in steel / cast iron / aluminium.
No rail is included - this listing is one carriage only. It runs on an LSH25 rail that is 23 mm wide (not 25) and carries pairing code B in its ordering code; your rail must show the same letter. LSH carriages and rails of the same model are interchangeable, but only within LSH - this block will not run on another manufacturer's rail. When replacing a worn block, read the code off the original carriage and inspect the rail raceway for scoring before reusing it.
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-F1L-H-B-M6
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