Airtac LSH Linear Guide Rail LSH25HN1X820S20BN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HN1X820S20BN-M6 is a standard-type profile linear guide on a 23 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
- SizeLSH25
- Rail width23 mm
- Carriage lengthStandard carriage
- Carriages1
- Rail length820 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 LSH25HN1X820S20BN-M6
Ordering LSH25HN1X820S20BN-M6 gets you matched parts rather than components to chase separately: a single standard-length square block plus an 820 mm rail, both size 25, both plain finish, with an M6 nipple for side greasing. Remember the rail measures 23 mm across, so a layout drawn from the size code alone would put the shoulder 2 mm out. The carriage rides on four ball rows whose 45 degree X raceway pattern shares load equally in every direction and lets the block self-align over small surface imperfections.
Because running parallelism is quoted over the rail length, this 820 mm rail sits within the N-grade band of 12 to 37 um; if the twin-rail machine needs tighter, H or P grade shortens the band at extra cost. Static capacity is 39.4 kN against 26.9 kN dynamic, close to the 1.5-to-1 ratio that runs through this range, and it is the dynamic figure that governs travel life - size on C, not on the bigger C0. Preload B raises rigidity at the price of installation latitude: 22 um parallel and 85 um height are the allowable errors at 500 mm spacing.
Airtac LSH Linear Guide Rail LSH25HN1X820S20BN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HN1X820S20BN-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 | LSH25 |
| Rail width | 23 mm (the size code is not the rail width above size 20) |
| Carriage style | Square (compact) |
| Carriage length | Standard carriage |
| Carriages supplied | 1 |
| Rail length | 820 mm |
| Basic dynamic load rating C | 26.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 39.4 kN per carriage |
| Allowable static moment | MR 0.44 / MP 0.38 / My 0.38 kN·m |
| Accuracy grade | N — normal grade |
| Preload grade | B — light preload |
| Mounting screws | M6 — 1370 N·cm into steel, 921 cast iron, 686 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 LSH25HN1X820S20BN-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| 1X820 | 1 carriage on a 820 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, 820 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 LSH25HN1X820S20BN-M6 Is Used
Benchtop CNC router upgrade
A 23 mm wide rail leaves more table width for clamping on a benchtop router, and one standard square block under the spindle plate keeps the 820 mm stroke honest even as cut loads reverse.
Case-packing pusher arm
Carton pushers stall against jams, and that is a static case: the 39.4 kN C0 rating absorbs the stalled load, though travel-life sizing should still use the 26.9 kN dynamic figure.
Servo feed unit on a press line
Twin 820 mm rails under a servo feed table bolt into an aluminium bed at 686 N.cm per M6 screw - a figure worth writing on the assembly drawing so the shop does not overtorque and distort the rail.
Is the Airtac LSH Linear Guide Rail LSH25HN1X820S20BN-M6 the Right Guide?
When a load overhangs the carriage, compare spending before you spend: stepping from LSH20 to this size 25 lifts the MR moment rating from 0.27 to 0.44 kN.m, about 63 percent, for one dimensional change, which usually beats stacking extra hardware at the smaller size. The long-block version of this carriage raises moment further, to 0.58 kN.m MR, if the overhang is severe. Downward, LRM suits light duties in tight spaces but publishes no load ratings, so we confirm them by enquiry; across, LGC answers short-travel jobs where crossed rollers give the rigidity. Confirm before ordering: form is a complete set; size 25 by both load and moment; square standard block; one carriage; 820 mm rail, 20 mm end offset; N accuracy; preload B with its tighter mounting tolerances; M6 fitting.
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 LSH25HN1X820S20BN-M6 FAQ
Each standard square carriage delivers 26.9 kN basic dynamic load and 39.4 kN basic static load, with moment caps of 0.44 kN.m (MR) and 0.38 kN.m (both MP and My). N-grade running parallelism falls between 12 and 37 um over the rail. Mounting: M6 bolts at 1370, 921 and 686 N.cm for steel, cast iron and aluminium beds. Grease: 3.6 cm3 initial fill and 1.1 cm3 refills of Mobilux EP2 or an equivalent, applied every 100 km travelled or every 3 to 6 months.
The box holds one 820 mm rail and one matched square carriage - a complete set, so no pairing code is needed. Because LSH carriages interchange within the same model, any matching LSH25 carriage can later replace this one on the same rail while keeping its smoothness, preload and accuracy; plain finish is standard, and black chrome is an order-only option.
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 LSH25HN1X820S20BN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.