Airtac LSH Linear Guide Rail LSH20BK-F2N-H-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F2N-H-B-M6 is a standard-type profile linear guide on a 20 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
- SizeLSH20
- Rail width20 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 LSH20BK-F2N-H-B-M6
One carriage, no rail: LSH20BK-F2N-H-B-M6 is a standard-length F2 bottom-flange block in high accuracy (H), pairing code B, lubricated through an M6 nipple. Because the F2 flange bolts down from below, the carriage top face stays clear for tooling plates, brackets and guards. The block rides a 20 mm wide LSH profile rail on four rows of balls at 45 degree contact, and its self-aligning geometry soaks up small datum errors rather than binding on them.
Per carriage the figures are 18.6 kN dynamic, 28.6 kN static and 0.27, 0.25 and 0.25 kN.m of allowable moment in MR, MP and My. Mounting detail decides a lot at this size: shoulder height 4.3 mm, adjacent corner radius no more than 0.5 mm, and M5 screws pulled to 882 N.cm on steel. A rail that is not seated flat against its datum and torqued properly costs real accuracy, whatever the grade label on the box says.
Airtac LSH Linear Guide Rail LSH20BK-F2N-H-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F2N-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Flange, bottom mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 18.6 kN per carriage |
|---|---|
| Basic static load rating C0 | 28.6 kN per carriage |
| Allowable static moment | MR 0.27 / MP 0.25 / My 0.25 kN·m |
| Accuracy grade | H — high grade |
| Mounting screws | M5 — 882 N·cm into steel, 588 cast iron, 441 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 LSH20BK-F2N-H-B-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | 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 LSH20BK-F2N-H-B-M6 Is Used
Packaging machine sealing jaw slide
A vertical form-fill-seal machine carries its sealing jaw on a bottom-flange block; this pairing-B replacement keeps the carriage top face free for the jaw bracket.
Camera bracket on an indexing conveyor
A food-line inspection camera bolts up from below over this F2 block, so nothing on the carriage top interferes with the washdown guard above it.
Palletizer rail refresh
A warehouse integrator swaps worn blocks on a palletizer's 20 mm guide rails, ordering pairing-B carriages to match rails that are still straight and sound.
Is the Airtac LSH Linear Guide Rail LSH20BK-F2N-H-B-M6 the Right Guide?
Match before you buy: this carriage carries pairing code B, so the rail it joins must be an LSH20 rail with the same letter. Note the code has no preload position - that quality emerges from the rail the carriage is finally paired with. Size on load and moment together (18.6 kN C and 0.27 kN.m MR here); go up to LSH25 for moment headroom, or to a long LSH20 block, and drop to LRM when the duty is light and the envelope small, with ratings confirmed by us since LRM lists none. Cross to LGC when travel is short and you want crossed-roller stiffness rather than long recirculating travel. Finish the checklist: standard F2 body, high accuracy, carriage count and rail length decided on the rail side, M6 nipple, and mounting shoulders machined to 4.3 mm with a corner radius under 0.5 mm.
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 LSH20BK-F2N-H-B-M6 FAQ
Dynamic load rating C 18.6 kN, static C0 28.6 kN per carriage. Allowable static moments MR 0.27, MP 0.25, My 0.25 kN.m. H-grade running parallelism spans 7 to 28 um depending on rail length. Mounting screws M5 at 882 N.cm (steel), 588 N.cm (cast iron), 441 N.cm (aluminium). Grease: 1.8 cm3 first charge, 0.6 cm3 top-up, every 100 km of travel or every 3 to 6 months, using Mobilux EP2 or equivalent.
No - this listing is the carriage alone; no rail is included and no preload is claimed. The BK in the code marks a carriage-only part. Pairing code B is the match key: the LSH20 rail you fit must carry the same letter, and any LSH20 carriage of this model will run on any LSH20 rail of this model with its accuracy kept. Read the letter off the old part before ordering, and avoid side-mounted nipples on this flange body because the fitting can foul.
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 LSH20BK-F2N-H-B-M6
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