Airtac LSH Linear Guide Rail LSH20HN2X1240S20BN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN2X1240S20BN-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 lengthStandard carriage
- Carriages2
- Rail length1240 mm
- AccuracyN — normal grade
- PreloadB — light 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 LSH20HN2X1240S20BN-M6
The LSH20HN2X1240S20BN-M6 is a complete LSH20 linear guide assembly: one 1240 mm profile rail with two square (H) standard-length carriages mounted on it. Each carriage carries four rows of recirculating balls seated in X-shaped arc raceways at a 45 degree contact angle, so downward, uplift and side loads all meet the same rating, and small mounting-surface errors are absorbed inside the block instead of binding the travel. The size 20 rail measures a true 20 mm across the top face.
Per carriage the catalogue gives 18.6 kN dynamic and 28.6 kN static, with moment ratings of 0.27 (MR), 0.25 (MP) and 0.25 (My) kN.m; with two carriages sharing an evenly distributed load, effective capacity roughly doubles. Light preload (B) raises rigidity over the free-running A grade but costs installation latitude: allowable height error drops from 130 um to 85 um across a 500 mm span. Normal accuracy runs a parallelism band of 12-37 um over this rail length.
Airtac LSH Linear Guide Rail LSH20HN2X1240S20BN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN2X1240S20BN-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 | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 1240 mm |
| 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 |
| Preload grade | B — light 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 LSH20HN2X1240S20BN-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. |
| N | Standard carriage. |
| 2X1240 | 2 carriages on a 1240 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| B | B — light 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, 1240 mm |
| Carriage | Yes, 2 |
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 LSH20HN2X1240S20BN-M6 Is Used
Pick-and-place gantry
A twin-axis gantry moving filled cartons on a packaging line: the two blocks share the vertical load and resist tipping as the head accelerates along the 1240 mm travel.
Flatbed UV printer
The carriage beam of a small flatbed UV printer travels the full bed width; light preload keeps banding out of prints without demanding a precision-ground table.
Benchtop CNC router
Converting a hobby router from round shafts to profile rail: the 20 mm rail bolts to an aluminium plate with M5 screws at 441 N.cm and swallows slight frame misalignment.
Is the Airtac LSH Linear Guide Rail LSH20HN2X1240S20BN-M6 the Right Guide?
Size the axis on moment first when the load hangs off the carriage: on LSH20 a standard block gives 0.27 kN.m of MR, a long block 0.35, and an LSH25 standard block 0.44, so stepping a size can beat adding hardware. If the duty is genuinely light and the space tight, AirTAC LRM is the smaller series - we confirm its figures from the datasheet because they are not published. Where travel is short and crossed-roller stiffness matters more than long recirculating runs, LGC is the alternative. Before ordering, tick off: set versus carriage-only versus rail-only, size against both load and moment, square or flange block, standard or long, block count and rail cut, accuracy and preload weighed against your achievable mounting tolerance, grease fitting, and for spare parts the pairing code printed on the original.
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 LSH20HN2X1240S20BN-M6 FAQ
Per carriage: dynamic rating C 18.6 kN, static C0 28.6 kN, static moments MR 0.27, MP 0.25, My 0.25 kN.m. Normal-grade running parallelism spans 12-37 um depending on rail length. The rail uses M5 mounting screws torqued to 882 N.cm in steel, 588 in cast iron, 441 in aluminium. Each carriage takes 1.8 cm3 of grease at first charge and 0.6 cm3 at top-up; re-grease every 100 km of travel or every 3-6 months, whichever comes first.
The B grade preloads the ball rows for higher rigidity, and the trade-off is a tighter mounting surface: over 500 mm of rail spacing the allowable parallelism error falls from 25 um (no preload) to 20 um, and allowable height error from 130 um to 85 um, proportional to actual spacing. Corner radius of the mounting shoulder must not exceed 0.5 mm, and the rail must be pulled flat to its datum and fully torqued or the achieved accuracy suffers.
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 LSH20HN2X1240S20BN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.