Airtac LSH Linear Guide Rail LSH15BK-HN-H-B-M4
The AirTAC Airtac LSH Linear Guide Rail LSH15BK-HN-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-HN-H-B-M4
A single square carriage from the LSH15 series, ordered on its own: H profile, standard N length, high accuracy grade, M4 grease nipple and pairing code B. There is no rail in this SKU - the block is meant to drop onto an LSH15 rail carrying the same B code, often as a wear-part replacement costing roughly a quarter of a complete guide. Four ball rows circulate in opposed 45 degree arc grooves, each ball touching at two points, which gives equal capacity up, down and sideways and enough self-alignment to forgive small machining errors on the mounting base. The rail beneath it is 15 mm wide.
Per carriage, the catalogue rates 11.3 kN dynamic C, 17.9 kN static C0 and 0.12 kN.m on each of the MR, MP and My axes. The high accuracy grade holds running parallelism within 7-28 um depending on rail length - worth having on a measuring or optics axis, but note that achieved accuracy also depends on the rail being pulled flat against its datum face and torqued correctly. If your load is cantilevered, check the 0.12 kN.m moment figure before the 11.3 kN load figure; on small axes the moment usually decides.
Airtac LSH Linear Guide Rail LSH15BK-HN-H-B-M4 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH15BK-HN-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 | Square (compact) |
| 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-HN-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-HN-H-B-M4 Is Used
Benchtop CNC mill X-axis
Replacing a scored carriage on a light-production milling machine's X saddle; the high accuracy grade keeps the rebuilt axis parallel within the 7-28 um band.
Optical inspection stage
A microscope camera stage rebuilt with an H-grade block so stage repeatability survives the swap; the pairing code B must match the existing rail.
CoreXY printer gantry service
Swapping the worn block on a 3D printer's gantry rail without replacing the whole guide - the square H profile matches the original mounting footprint.
Is the Airtac LSH Linear Guide Rail LSH15BK-HN-H-B-M4 the Right Guide?
Work from the duty, not the worn part number. At 11.3 kN dynamic and 0.12 kN.m moment this size covers light axes; when the moment governs a cantilever, moving up to LSH20 more than doubles MR (0.12 to 0.27 kN.m), while a second carriage on the same rail is the fix for tipping along the travel, not for side load. LRM is the smaller-envelope step down, but its ratings are unpublished, so confirm them with us before committing. For short travel where crossed-roller stiffness matters more than long recirculating runs, cross-check LGC. Before ordering: form (carriage only), size by load and moment, square profile, standard length, accuracy H, M4 fitting, and pairing code B verified against your existing 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 LSH15BK-HN-H-B-M4 FAQ
For LSH15, standard length: dynamic C 11.3 kN, static C0 17.9 kN, moments MR 0.12, MP 0.12 and My 0.12 kN.m, all per carriage. High accuracy means running parallelism in the 7-28 um band over the rail length range. Rail mounting uses M4 screws at 412, 274 or 206 N.cm on steel, cast iron or aluminium. Grease: 0.9 cm3 Mobilux EP2 first charge, 0.3 cm3 top-up, repeated every 100 km of travel or every 3 to 6 months, whichever comes sooner.
No. This is a carriage-only SKU; no rail is included or implied. The pairing letter B on the block must match the letter on your LSH15 rail, since rails and carriages are matched as pairs by that code and other letters are separate SKUs. If the code on the old part is unreadable, send us the original complete-set code and we will identify the right replacement.
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-HN-H-B-M4
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.