Airtac LSH Linear Guide Rail LSH25BK-F2N-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2N-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 lengthStandard 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-F2N-H-D-M6
What arrives is a single F2 bottom-flange carriage for 23 mm LSH25 rail - no rail in the box. Standard length, high accuracy, M6 nipple, pairing code D. Bolted from underneath through the flange, the block leaves the entire top face free, so fixtures, tooling plates or the load itself can sit on the carriage without dodging bolt heads. Inside, four rows of balls recirculate through 45 degree X-pattern arc grooves with two contact points each, giving the same capacity in every direction and enough self-alignment to forgive small machining errors on the seat.
As a size 25 standard-length block it is rated 26.9 kN dynamic, 39.4 kN static, and 0.44 / 0.38 / 0.38 kN.m for the MR, MP and My moments. One caution from the catalogue: side-mounted grease fittings are not recommended on flange blocks because the nipple can foul neighbouring parts, so check the clearance around this M6 port before fixing the carriage down.
Airtac LSH Linear Guide Rail LSH25BK-F2N-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2N-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 | 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 | 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-F2N-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. |
| N | Standard 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-F2N-H-D-M6 Is Used
Fixture plate carrier on a machining centre
Tooling plates can be tapped straight down onto this F2 block, because its flange bolts pass underneath and the running surface stays uninterrupted by screw heads.
Cartoning machine sealing head
A packaging line sealing head that presses downward suits a bottom-flange block: clamp screws sit below the flange, clear of product splash and changeover tooling.
Laser cutter gantry refurbishment
Refitting a flatbed laser cutter's beam carriage with a new block, coded D, restores smooth travel without touching the 23 mm rails already fixed to the frame.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2N-H-D-M6 the Right Guide?
Choose this form when the surface above the carriage must stay clear - F2 takes its screws from below, unlike the square H block that clamps down on top. If the moment rating governs, an LSH25 long carriage raises MR to 0.58 kN.m, or step up a size. Lighter, more compact duties may suit LRM instead, but its load ratings are unpublished and are confirmed case by case. Short-travel work needing crossed-roller stiffness points to LGC.
Checklist: carriage only (no rail), size 25 by load and moment together, F2 bottom flange, standard length, H accuracy, M6 fitting, and pairing code D matched to your existing rail. Preload is set by the matched pairing, and datasheet items such as base materials and weight come with our quotation on request.
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-F2N-H-D-M6 FAQ
Per block: dynamic C 26.9 kN, static C0 39.4 kN; MR 0.44 kN.m, MP 0.38 kN.m, My 0.38 kN.m. H grade running parallelism 7-28 um across the rail length bands. Fixing screws M6 - 1370 N.cm into steel, 921 into cast iron, 686 into aluminium. Mobilux EP2 or equivalent, 3.6 cm3 first fill, 1.1 cm3 top-ups, renewed every 100 km of travel or every 3 to 6 months.
It is not. Only the carriage ships - the profile rail is a separate order. The pairing letter D ties this block to a rail with the same code; find it printed on the rail or its label. A block and rail sharing a model and pairing letter run together with their rated smoothness and accuracy, and blocks stay swappable within LSH25 of this model. Rails for this size are cut up to 4040 mm.
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-F2N-H-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.