Airtac LSH Linear Guide Rail LSH20BK-HN-N-E-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-HN-N-E-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
- AccuracyN — normal 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-HN-N-E-M6
A single spare carriage from the AirTAC LSH20 line: size 20, true rail width 20 mm, square (H) body in the standard (N) length, normal accuracy, side M6 nipple for greasing. The rail is not part of this listing - you are buying the block only. Inside, four ball rows sit in 45 degree X-shaped arc raceways with two contact points per ball, giving the same capacity in every direction and enough self-alignment to swallow slight flatness error in the machine deck.
Figures per carriage: 18.6 kN dynamic (C), 28.6 kN static (C0), moments MR 0.27, MP 0.25 and My 0.25 kN.m. Watch the grease clock on a cycling axis: a 300 mm stroke running once per second covers 100 km in under four days of round-the-clock running, so the distance limit, not the 3-to-6-month calendar, usually calls the top-up of 0.6 cm3. The E code is the pairing key - your rail must carry the same letter for the carriage to run true with its rated preload and accuracy.
Airtac LSH Linear Guide Rail LSH20BK-HN-N-E-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-HN-N-E-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 | Square (compact) |
| 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 | N — normal 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-HN-N-E-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. |
| N | N — normal 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-HN-N-E-M6 Is Used
Large-format 3D printer spare
Wide-bed 3D printers run LSH20-class rails across the gantry. Holding one E-coded spare block means a dusty or crashed carriage is a ten-minute exchange instead of a week of print backlog.
Indexing table drive block
A rotary indexing table whose linear feed sees thousands of short cycles a shift wears its carriage long before the rail. This N-grade block keeps the original 0.27 kN.m roll moment rating on a fast duty.
Workshop press feed slide
A small hydraulic press with a motorised feed slide benefits from a fresh recirculating-ball carriage; the self-aligning four-row geometry tolerates the slight misalignment typical of fabricated press frames.
Is the Airtac LSH Linear Guide Rail LSH20BK-HN-N-E-M6 the Right Guide?
Keeping a matched spare on the shelf is the smartest reason to buy this code: when a production block fails, a carriage-only swap costs roughly a quarter of a full set and the sound rail stays in place. Sizing sideways and up or down: light-duty compact machines can step down to LRM, whose load ratings are unpublished, so we confirm them case by case; heavy cantilever moments argue for a size up, since LSH25 raises MR from 0.27 to 0.44 kN.m, some 63 percent; and short-stroke work needing the stiffness of crossed rollers is better served by LGC.
Before you commit: verify this is the carriage-only form you need; check load AND moment against your duty; confirm square standard body, N accuracy (12-37 um running parallelism) and the M6 fitting suit the machine; and match pairing code E to the rail. Two blocks on one rail also resist tipping along the travel far better than one, if your original build used two.
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-HN-N-E-M6 FAQ
Dynamic rating C is 18.6 kN and static C0 is 28.6 kN per carriage; static sits near 1.5 times dynamic, and C is the value that sets travel life. Moment limits per carriage are MR 0.27, MP 0.25 and My 0.25 kN.m. As N grade, running parallelism falls between 12 and 37 um. The mating rail takes M5 screws torqued to 882 N.cm on steel, 588 on cast iron, 441 on aluminium. Lubrication: 1.8 cm3 at first charge, 0.6 cm3 top-ups, every 100 km of travel or every 3 to 6 months.
No rail ships with this product - it is a carriage-only listing, so please do not order it as a complete guide. The E in the code is the pairing key: each LSH20 rail and carriage carries a letter, and matched letters run together with the rated smoothness, preload and accuracy. A block with a different letter may fit the rail profile but will not deliver the specified performance. Quote the E code, or send photos of the old parts, when you order a rail to go with it.
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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-HN-N-E-M6
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