Airtac LSH Linear Guide Rail LSH20HN3X2950S35AN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN3X2950S35AN-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
- Carriages3
- Rail length2950 mm
- AccuracyN — normal grade
- PreloadA — no 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 LSH20HN3X2950S35AN-M6
LSH20HN3X2950S35AN-M6 is a complete AirTAC LSH linear guide assembly: one 2950 mm profile rail in size 20 (true rail width 20 mm) carrying three square, standard-length carriages. Each carriage runs four rows of recirculating balls in X-shaped arc raceways set at 45 degrees, so the block takes load equally from above, below and both sides, and slight mounting-surface error is absorbed inside the carriage instead of causing binding. The first bolt hole sits 35 mm in from each rail end.
Per block the ratings are 18.6 kN dynamic, 28.6 kN static and static moments of 0.27 kN.m MR / 0.25 kN.m MP / 0.25 kN.m My; three blocks sharing the load evenly give the axis roughly 55.8 kN of dynamic capacity. The 2950 mm cut leaves 1090 mm of headroom under the 4040 mm maximum rail length for size 20, and N grade running parallelism is held inside a 12-37 um band.
Airtac LSH Linear Guide Rail LSH20HN3X2950S35AN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN3X2950S35AN-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 | 3 |
| Rail length | 2950 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 | A — no 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 LSH20HN3X2950S35AN-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. |
| 3X2950 | 3 carriages on a 2950 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| A | A — no 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, 2950 mm |
| Carriage | Yes, 3 |
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 LSH20HN3X2950S35AN-M6 Is Used
Gantry mill Y-axis
Three blocks under the moving beam of a small gantry milling machine keep the spindle plate level across 2.9 m of travel.
Warehouse shuttle
A storage-and-retrieval shuttle running a racking aisle rides the long rail with its payload shared across three carriages.
Laser inspection bridge
A scanning bridge on a laser metrology table traverses the 2950 mm rail with N grade parallelism of 12-37 um along its length.
Is the Airtac LSH Linear Guide Rail LSH20HN3X2950S35AN-M6 the Right Guide?
Start from the moment, not just the load: the standard LSH20 block gives 0.27 kN.m MR, and if a cantilever needs more, LSH25 N lifts that to 0.44 kN.m (about 63 percent) in one size step, while a long LSH20 carriage reaches 0.35 kN.m without changing rail. If the duty is light and the envelope tight, step down to AirTAC LRM, whose load ratings are not published in the LSH table, so we confirm them against your numbers before quoting. For short-travel work needing crossed-roller rigidity rather than long recirculating travel, LGC is the cross-over choice. Before ordering, tick the list: form (complete set here), size chosen on load AND moment, carriage style and length, number of blocks and rail length, accuracy grade and preload - preload A tolerates a 130 um height error at 500 mm spacing, whereas medium preload C cuts that to 50 um - grease fitting (the M6 family fits size 20), and keep the carriage code on file so a future carriage-only spare matches the rail.
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 LSH20HN3X2950S35AN-M6 FAQ
Each standard square block on size 20 is rated 18.6 kN basic dynamic (C) and 28.6 kN basic static (C0), with allowable static moments MR 0.27, MP 0.25 and My 0.25 kN.m. The N grade rail holds running parallelism within a 12-37 um band. Mount the rail with M5 screws torqued to 882 N.cm in steel, 588 N.cm in cast iron or 441 N.cm in aluminium. Each block comes pre-filled with 1.8 cm3 of Mobilux EP2 and takes 0.6 cm3 on top-up; re-grease every 100 km of travel or every 3 to 6 months, whichever comes first.
This set has no preload, which is the most forgiving grade: at 500 mm rail spacing the allowable parallelism error P is 25 um and the allowable height error S is 130 um, scaling with your actual spacing. Choosing medium preload C would raise rigidity but tighten the height allowance to 50 um, so the stiffer the guide, the flatter and more accurately machined the mounting face has to be.
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 LSH20HN3X2950S35AN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.