Airtac LSH Linear Guide Rail LSH20HN1X555S7.5CN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN1X555S7.5CN-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
- Carriages1
- Rail length555 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 LSH20HN1X555S7.5CN-M6
The code LSH20HN1X555S7.5CN-M6 breaks down as a complete size 20 set with a single standard square carriage on a 555 mm rail, medium preload C, normal accuracy and an M6 fitting. Four rows of balls at a 45 degree contact angle with two-point engagement give the block the same capacity radial, reverse-radial and lateral, and let it ride out slight misalignment between the two rails. The 7.5 mm end offset is among the tightest of the common LSH20 options, shrinking the dead zone at each end of the travel.
Preload C is the stiffest grade offered at this size. The price is installation precision: allowable height error between rails drops from 130 um on the unloaded grade to 50 um, and parallelism error from 25 um to 18 um at 500 mm spacing - roughly 2.6 times tighter. In return the carriage resists vibration and moment-induced lift far better, which matters on rotating or reversing loads. Per-block ratings stay at 18.6 kN dynamic, 28.6 kN static and 0.27/0.25/0.25 kN.m MR/MP/My.
Airtac LSH Linear Guide Rail LSH20HN1X555S7.5CN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN1X555S7.5CN-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 | 1 |
| Rail length | 555 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 | 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 LSH20HN1X555S7.5CN-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. |
| 1X555 | 1 carriage on a 555 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, 555 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 LSH20HN1X555S7.5CN-M6 Is Used
CNC router Z column
The spindle carriage on a light-production router sees lift-off as the cutter grabs; medium preload keeps the ball circuit loaded so Z height does not wander between passes.
Fiber laser head rail
A cutting head carriage dials in better on a preloaded guide - vibration from pierce pulses does not upset the head-to-plate standoff along the 555 mm of travel.
High-speed sorting pusher
A sorting pusher stroking 250 mm once per second piles up distance fast; at that duty the 100 km grease interval arrives within days of continuous cycling, and the M6 fitting keeps re-lubrication quick.
Is the Airtac LSH Linear Guide Rail LSH20HN1X555S7.5CN-M6 the Right Guide?
Choose this set when your frame can hold a 50 um height spec over a 500 mm span and you need the stiffness - a CNC router Z-slide, a laser head column. If the machining cannot reach that tolerance, the same geometry with light preload B (85 um allowed) is the safer buy; if it must be looser still, take grade A. Cantilevered loads beyond 0.27 kN.m call for the long carriage or a move to LSH25 rather than a longer rail. Very light, compact slides step down to LRM, whose ratings we confirm by enquiry since they are unpublished; short-travel precision stages with crossed-roller needs step across to LGC. Order checklist: complete set form, size 20 selected on load and moment, square standard block, one carriage, 555 mm rail, normal accuracy, preload C, M6 fitting - and note preload D simply does not exist at size 20.
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 LSH20HN1X555S7.5CN-M6 FAQ
Per block: dynamic rating C 18.6 kN; static rating C0 28.6 kN; allowable moments MR 0.27, MP 0.25, My 0.25 kN.m; running parallelism 12-37 um in normal grade N across this length band; rail fixing M5 socket screws torqued to 882, 588 and 441 N.cm on steel, cast iron and aluminium; lubrication Mobilux EP2 with a 1.8 cm3 factory charge and 0.6 cm3 top-ups via the M6 nipple every 100 km of travel or every 3 to 6 months, whichever comes first.
Rigidity and resistance to vibration and ball-path float rise noticeably; the installation allowance shrinks - at 500 mm rail spacing, height error drops from 130 um with no preload to 50 um, and parallelism from 25 um to 18 um, scaled to your true spacing. Block geometry, dimensions and load ratings are identical across preload grades, so you can change grade without redesigning the mounting. Self-alignment still helps, but only inside those limits - beyond them the carriage binds instead of correcting, so measure your bed before committing to grade C.
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 LSH20HN1X555S7.5CN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.