Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-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 asComplete guide set
- SizeLSH20
- Rail width20 mm
- Carriage lengthLong carriage
- Carriages1
- Rail length270 mm
- AccuracyN — normal grade
- PreloadC — medium preload
- 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 LSH20HL1X270S15CN-M6
LSH20HL1X270S15CN-M6 is the preloaded variant of the size 20 long-carriage guide: one 270 mm rail with a single long square block, ordered with medium preload C. The geometry is the standard LSH four-row layout, balls at 45 degrees in X-configured raceways for identical capacity up, down and sideways, with self-alignment absorbing slight mounting errors. Rail width here is a true 20 mm.
Preload C stiffens the block against reversing loads and vibration, but it narrows what your machine bed must achieve: at 500 mm rail spacing the allowable height error S drops to 50 um and parallelism P to 18 um, against 130 um and 25 um for the no-preload version of the same size. The ratings themselves are unchanged by preload - C is 22.2 kN, C0 is 37.6 kN, MR 0.35 kN.m - so the trade you are making is rigidity against installation precision.
Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Complete guide set |
| 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 | Long carriage |
| Carriages supplied | 1 |
| Rail length | 270 mm |
| 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 | N — normal grade |
| Preload grade | C — medium preload |
| 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 |
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.
Model Code: Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| L | Long carriage. |
| 1X270 | 1 carriage on a 270 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| C | C — medium preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| N | N — normal grade. |
| -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 | Complete guide set |
|---|---|
| Rail | Yes, 270 mm |
| Carriage | Yes, 1 |
Rail and carriage(s) supplied together, matched as a set. 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 LSH20HL1X270S15CN-M6 Is Used
Grinder dressing slide
A diamond dresser traversing across a grinding wheel on a toolroom surface grinder: medium preload holds the path steady under the reversing dressing load.
Automated optical inspection camera rail
An overhead camera riding a short gantry over electronics panels: the stiff preloaded block prevents image drift at the reversal points, keeping defect maps comparable shot to shot.
X-ray cabinet shield traverse
A sliding radiation shield on an inspection cabinet: the medium preload removes play so the shield always parks in exactly the same closed position.
Is the Airtac LSH Linear Guide Rail LSH20HL1X270S15CN-M6 the Right Guide?
Because preload C is already built in, judge your machine bed first: the block needs its mounting face held to 50 um height error and 18 um parallelism over a 500 mm span, and if your datum cannot deliver that, the rigidity is wasted - the unloaded version of this same assembly doubles the height allowance instead. Sizing downward, LRM suits light compact duties but its load ratings are not published, so we verify them with you; short travels needing roller rigidity belong on LGC. If MR 0.35 kN.m per block is still short, add a second carriage against tipping along the travel, or step to LSH25 N at 0.44 kN.m. Final checks: form, size by C and moment, style and length, count and rail length, accuracy and the preload cost, M6 fitting, and the pairing code for any part replacement.
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 LSH20HL1X270S15CN-M6 FAQ
Preload changes rigidity, not the catalogue ratings: C stays 22.2 kN and C0 37.6 kN per long carriage, with MR 0.35, MP 0.34, My 0.34 kN.m. N-grade running parallelism falls between 12 and 37 um over the rail length bands. Fix the rail with M5 screws at 882 N.cm steel, 588 cast iron, 441 aluminium, and feed 2.7 cm3 of grease at first charge, 0.9 cm3 per top-up, every 100 km of travel or 3 to 6 months, whichever comes first.
Only if your bed can hold it. With medium preload this 270 mm set must be mounted to 18 um parallelism and 50 um height error over a 500 mm span - against 25 and 130 um for the same assembly without preload - and the allowance scales with real spacing. In exchange the block resists vibration and reversing loads with far less play. The carriage arrives pre-filled with Mobilux EP2, and top-ups on sizes 20 to 35 go through the M6 family fitting on the block side.
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 LSH20HL1X270S15CN-M6
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