Airtac LSH Linear Guide Rail LSH20HN2X230S20BN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN2X230S20BN-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 length230 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 LSH20HN2X230S20BN-M6
LSH20HN2X230S20BN-M6 is the light-preload version of the short two-carriage set: one hardened profile rail of 230 mm with the S20 end-hole offset, two HN standard-length square carriages, normal accuracy (N) and an M6 grease fitting. The B code removes a small amount of internal clearance, so the ball contact is firmer than a free-running set without the demanding installation tolerances of medium preload. Rail width for size 20 is a true 20 mm; shoulders are H 4.3 mm with a maximum corner radius of 0.5 mm. Each carriage carries four rows of balls on X-shaped 45 degree arc raceways, equal-rated in all four directions and self-aligning within the limits of the size and preload grade.
Light preload is the middle road in numbers as well as feel: at 500 mm rail spacing the set still tolerates 20 um of parallelism and 85 um of height error, tighter than the 25/130 um of a no-preload set yet more forgiving than the 20/50 um of preload C. Per standard carriage the catalogue ratings are 18.6 kN dynamic and 28.6 kN static - static sits at roughly 1.5 times dynamic across this range - with moments of MR 0.27 / MP 0.25 / My 0.25 kN.m, shared by the two blocks on the 230 mm rail.
Airtac LSH Linear Guide Rail LSH20HN2X230S20BN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN2X230S20BN-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 | 230 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 LSH20HN2X230S20BN-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. |
| 2X230 | 2 carriages on a 230 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, 230 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 LSH20HN2X230S20BN-M6 Is Used
Adhesive dispensing gantry on an electronics potting line
A dispensing head reversing over PCBs hundreds of times a shift develops audible play on a clearance-fit guide. Light preload takes the knock out without the tight face tolerances of medium preload, and the twin blocks steady the overhung dispense valve.
High-cycle transfer shuttle in an automotive sub-assembly line
A shuttle indexing components between stations reverses under load every few seconds. Firmer ball contact from preload B keeps reversal repeatable, and the M6 fitting supports a disciplined 0.6 cm3 top-up at each 100 km service point.
Print-head carriage adjustment axis in a digital press
An axis that sets and fine-tunes head position needs motion without looseness but without heavy drag. Light preload gives that feel, the 230 mm rail fits the compact head beam, and the 85 um height tolerance is achievable on a machined press frame.
Is the Airtac LSH Linear Guide Rail LSH20HN2X230S20BN-M6 the Right Guide?
Choose light preload when a duty cycle reverses often enough that clearance shows up as knock or lost motion, but the mounting surfaces cannot hold the tight flatness that medium preload demands. If the budget and the faces allow, preload C on the same size buys more rigidity; if motion must stay free, drop to preload A. The size decision should weigh moment first: 0.27 kN.m MR per standard block here, 0.35 kN.m with the long LSH20 carriage, 0.44 kN.m at LSH25 - one size up usually beats adding a third block for moment, while a second carriage (as on this set) addresses tipping along the travel. Lighter duties in tighter spaces point to LRM, whose ratings are not published and so are confirmed case by case; short travels needing crossed-roller stiffness point to LGC instead. Order checklist: form (complete set), size by load and moment, carriage style and length, block count, rail length and end offset, accuracy and preload with their installation cost, and the M6 grease fitting for this size family.
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 LSH20HN2X230S20BN-M6 FAQ
For each standard-length size 20 carriage: dynamic capacity C 18.6 kN, static capacity C0 28.6 kN, allowable moments MR 0.27 / MP 0.25 / My 0.25 kN.m, all as catalogue kN values. Grade N accuracy corresponds to a 12-37 um running parallelism band. Fixing is by M5 screws at 882 N.cm (steel), 588 N.cm (cast iron) or 441 N.cm (aluminium). Lubrication is Mobilux EP2 or equivalent: 1.8 cm3 first charge per standard carriage, 0.6 cm3 top-up through the M6 fitting, every 100 km of travel or every 3-6 months, stroking the carriage at least three lengths twice afterwards and confirming an even film on the rail.
Preload buys stiffness and costs installation latitude, in a stepped way. At 500 mm rail spacing this preload-B set allows 20 um of parallelism error and 85 um of height error, where the same size without preload allows 25 um and 130 um, and medium preload allows only 20 um and 50 um. Proportion the values to your actual spacing. Self-alignment absorbs only slight error within those limits - it does not replace careful faces. Torque the M5 screws correctly and verify the rail is pulled fully against its datum, since that contact has a large effect on the accuracy you finally get, and keep the supplied bolt caps seated flush so swarf never reaches the ball circuit.
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Standard models are processed and dispatched in 3-5 business days.
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