Airtac LSH Linear Guide Rail LSH20BK-F1L-H-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F1L-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 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 LSH20BK-F1L-H-B-M6
LSH20BK-F1L-H-B-M6 is a carriage and nothing else: one AirTAC LSH20 long top-flange (F1) block at high (H) accuracy, with pairing code B and an M6 grease fitting. No rail is included, and the order code has no preload position - preload is declared only when carriage and rail are bought as a matched set. The F1 flange bolts down from above, so the fixing holes sit where you can reach them, and the long body gives a longer footprint than the standard LSH20 block on the same 20 mm rail. Four rows of balls run in X-arranged 45 degree raceways, so the completed guide self-aligns and absorbs slight mounting error instead of binding.
The long carriage lifts moment capacity faster than it lifts load: the dynamic rating is 22.2 kN against 18.6 kN for the standard body, about 19 percent more, while MR rises from 0.27 to 0.35 kN.m, roughly 30 percent, with MP and My both 0.34 kN.m. Static rating is 37.6 kN. For a cantilevered or overhung duty, the moment figure is usually the one that sizes the block, not C. The economics also favour this form: a carriage costs about a quarter of a complete set, so renewing the block on a sound rail is the cheap repair.
Airtac LSH Linear Guide Rail LSH20BK-F1L-H-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Flange, top mounting |
| Carriage length | Long carriage |
| Basic dynamic load rating C | 22.2 kN per carriage |
|---|---|
| Basic static load rating C0 | 37.6 kN per carriage |
| Allowable static moment | MR 0.35 / MP 0.34 / My 0.34 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-F1L-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. |
| 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 LSH20BK-F1L-H-B-M6 Is Used
Worn block swap on a pick-and-place gantry
A maintenance crew replaces only the long F1 carriage on a sound rail, paying roughly a quarter of a set price and logging pairing code B so the next reorder is exact.
Feed slide on a bottle-capping machine
The long body's higher moment rating carries the swing load of a capping head crossing the slide without the carriage tipping along the direction of travel.
Load-transfer slide in a packing hall
Top-flange fixing from above speeds the retrofit of a transfer slide on palletising conveyors, where the rail stays fixed and only the block is lifted off and renewed.
Is the Airtac LSH Linear Guide Rail LSH20BK-F1L-H-B-M6 the Right Guide?
Buying a carriage alone is a repair or upgrade decision, so start by reading the part being replaced: form (carriage only), pairing code B, and the size taken from load and moment together - the dynamic figure 22.2 kN governs travel life, while the larger static 37.6 kN guards against permanent deformation under shock and should not be the sizing number on its own. If the duty is lighter and the envelope smaller, step down to LRM, whose load ratings are not published, so we confirm them for you. For short travel needing crossed-roller rigidity rather than long recirculating travel, step across to LGC. Finish the checklist: style (F1 top flange), length (long), carriage count, accuracy grade H, preload chosen only on complete sets, and the M6 fitting, which belongs to the M6 family that suits sizes 20 to 35.
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-F1L-H-B-M6 FAQ
Per carriage, long body: dynamic load C 22.2 kN, static load C0 37.6 kN, static moments MR 0.35, MP 0.34, My 0.34 kN.m. High accuracy H gives a running parallelism band of 7-28 um. The mating LSH20 rail is bolted with M5 screws at 882 / 588 / 441 N.cm on steel / cast iron / aluminium. Lubrication: pre-filled with Mobilux EP2, first charge 2.7 cm3, top-up 0.9 cm3 through the M6 fitting, re-grease every 100 km of travel or every 3 to 6 months.
No. The BK in the code means carriage only: one long top-flange block at high accuracy with an M6 fitting, and no rail, no preload and no end-offset data. Rails and carriages are tied together by the pairing letter, here B, so a rail-only or complete-set order must carry the same letter. Check the code stamped on your original block before ordering a replacement, and drive the supplied bolt caps fully into the rail holes if you work on the rail later, or swarf will reach the ball circuit.
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-F1L-H-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.