Airtac LSH Linear Guide Rail LSH15BK-F2N-H-B-M4
The AirTAC Airtac LSH Linear Guide Rail LSH15BK-F2N-H-B-M4 is a standard-type profile linear guide on a 15 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
- SizeLSH15
- Rail width15 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 LSH15BK-F2N-H-B-M4
LSH15BK-F2N-H-B-M4 is a single replacement carriage from the AirTAC LSH profile rail family, supplied on its own - no rail is included. The block is an F2 flange pattern that mounts from below, standard length, high accuracy grade, fitted with an M4 grease nipple, and the trailing letter B is its pairing code: it must match a B-coded LSH15 rail. Four rows of recirculating balls run in X-shaped arc raceways at a 45 degree contact angle with two-point contact per ball, giving equal capacity in all four directions and absorbing slight mounting error inside the block. Size 15 runs on a true 15 mm rail width.
AirTAC rates this standard-length size 15 block at 11.3 kN basic dynamic load C and 17.9 kN basic static C0, with allowable static moments of 0.12 kN.m each for MR, MP and My. Static sits roughly 1.6 times above dynamic here, and the C figure is the one that governs travel life - sizing on the bigger C0 number alone is a common mistake. Economically, a carriage-only SKU typically lists near a quarter of a complete set, so swapping a worn block onto a sound rail is usually the cheaper repair.
Airtac LSH Linear Guide Rail LSH15BK-F2N-H-B-M4 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH15BK-F2N-H-B-M4 |
|---|---|
| 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 | LSH15 |
| Rail width | 15 mm |
| Carriage style | Flange, bottom mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 11.3 kN per carriage |
|---|---|
| Basic static load rating C0 | 17.9 kN per carriage |
| Allowable static moment | MR 0.12 / MP 0.12 / My 0.12 kN·m |
| Accuracy grade | H — high grade |
| Mounting screws | M4 — 412 N·cm into steel, 274 cast iron, 206 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 LSH15BK-F2N-H-B-M4
| LSH | LSH Series Linear Guide. |
|---|---|
| 15 | Size code. |
| 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 LSH15BK-F2N-H-B-M4 Is Used
Benchtop CNC router block swap
A hobby CNC router's X-axis block scores after a way-cover failure; a new B-paired F2 carriage restores travel without scrapping the original 15 mm rail.
Pick-and-place Z column service
Replace a brinelled block under a vertically mounted gripper, where the bottom-flange F2 pattern keeps the column's top face clear and the 17.9 kN static rating holds the parked load.
Small laser cutter gantry tune-up
Fitting an H-grade block returns a swarf-worn gantry to its 7-28 um running parallelism band before a precision cutting job.
Is the Airtac LSH Linear Guide Rail LSH15BK-F2N-H-B-M4 the Right Guide?
Start the match with four checks: this SKU is carriage only; the size must clear both load and moment; the style and length are F2 flange, standard; and the pairing code off your original part must read B. For light duty in a compact envelope, AirTAC's LRM miniature guide steps down from LSH - its ratings are not published, so we confirm them for you by RFQ. If the 0.12 kN.m moment, not the 11.3 kN load, is what limits your overhang, a second carriage on the same rail counters tipping along the travel, or LSH20 lifts MR to 0.27 kN.m in one size step. Where travel is short and the job wants crossed-roller rigidity rather than long recirculating travel, step across to LGC instead. If you later order a complete set, remember preload trades installation latitude for rigidity; grease fitting choices on size 15 stay within the M4 family (M4, AM6, LM6).
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 LSH15BK-F2N-H-B-M4 FAQ
Per standard-length carriage: basic dynamic load C 11.3 kN, basic static C0 17.9 kN, allowable static moments MR 0.12, MP 0.12 and My 0.12 kN.m. High accuracy grade running parallelism spans 7-28 um depending on rail length. The block arrives pre-filled with Mobilux EP2 - first charge 0.9 cm3, top-up 0.3 cm3, re-grease every 100 km of travel or every 3 to 6 months. Mating rail screws are M4 at 412 N.cm into steel, 274 N.cm into cast iron, 206 N.cm into aluminium.
No rail is included - this listing is the carriage alone. AirTAC matches LSH carriages to rails of the same model by the trailing letter, so this B block must be fitted to a B-coded LSH15 rail. Read the letter off your original carriage or rail end before ordering; interchange with another manufacturer's rail is not supported.
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 LSH15BK-F2N-H-B-M4
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