The AirTAC Airtac LSH Linear Guide Rail LSH30BK-F2N-H-C-M6 is a standard-type profile linear guide on a 28 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.
The LSH30BK-F2N-H-C-M6 is a single high-accuracy carriage in the bottom-flange F2 pattern, standard length, supplied without any rail. Bolting from below through the flange keeps the block's top face completely clear, which matters when a fixture plate, bracket or tooling sits directly on it. The four rows of recirculating balls sit in opposed 45 degree arc grooves, so slight misalignment of the mounting face is taken up inside the carriage rather than forcing the balls. Size 30 means a 28 mm wide rail, worth checking before machining a new bed.
The static figure, 55.0 kN, is roughly one and a half times the 37.4 kN dynamic rating - a pattern that holds across the whole range. Size on C for travel life; reach for C0 only when the load sits still or creeps. Moments per carriage: MR 0.66, MP 0.67, My 0.67 kN.m. This unit's pairing code is C, and the rail you mate it to must carry the same letter.
| Model | Airtac LSH Linear Guide Rail LSH30BK-F2N-H-C-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Carriage / block only |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH30 |
| Rail width | 28 mm (the size code is not the rail width above size 20) |
| Carriage style | Flange, bottom mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 37.4 kN per carriage |
|---|---|
| Basic static load rating C0 | 55.0 kN per carriage |
| Allowable static moment | MR 0.66 / MP 0.67 / My 0.67 kN·m |
| Accuracy grade | H — high grade |
| Mounting screws | M8 — 3040 N·cm into steel, 2010 cast iron, 1470 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, matched by the pairing code |
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. This item is a carriage only. Order a complete set if you also need a rail.
| LSH | LSH Series Linear Guide. |
|---|---|
| 30 | Size code — note the rail is 28 mm wide, not 30 mm. |
| BK | Carriage / block only — no rail supplied. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| H | H — high grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -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. |
| This order | Carriage / block only |
|---|---|
| Rail | No — not supplied with this item |
| Carriage | Yes, one |
This is a carriage on its own. NO RAIL IS INCLUDED. 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.
Mounting this F2 block under a plasma cutting crossbeam leaves the top face free for the torch saddle and cable chain, with the bolt heads hidden below the beam.
On a modular gantry where one axis block is worn, exchanging just the carriage keeps the section frame and its code C rail untouched.
When a weld jig slide has lost its squareness, a fresh H-grade carriage torqued evenly onto a flat, sound rail is the first thing to restore.
Step down to LRM when the load is small and the envelope tight - its ratings are unpublished, so ask us to verify them for the duty. If the job is a cantilever, compare moments rather than C: one size up to LSH35 N lifts MR from 0.66 to 1.05 kN.m, about 59 percent, often for less than a redesign. Where travel is short and rigidity under load reversal matters more than long recirculating travel, crossed-roller LGC is the better family. Before ordering, tick off: carriage-only form, size against both load and moment, F2 bottom flange, standard length, H accuracy, M6 nipple, and pairing code C on the rail side.
Quick checklist
Per carriage: C 37.4 kN dynamic, C0 55.0 kN static, moments MR 0.66 / MP 0.67 / My 0.67 kN.m. H-grade running parallelism is 7 to 28 um across the rail length bands. The mating rail bolts down with M8 screws at 3040 N.cm (steel), 2010 (cast iron), 1470 (aluminium). Grease first charge is 5.4 cm3 with 1.7 cm3 top-ups, due every 100 km or 3 to 6 months.
One F2 bottom-flange carriage only - there is no rail in this SKU and it is not a complete guide. The pairing letter C must match between this carriage and the LSH30 rail it runs on; if you are replacing a block, read the letter off the old carriage or the rail end.
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Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.