The AirTAC LSH Linear Guide Block LSH30BK-F2N-P-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-P-C-M6 is the block on its own: one size 30 F2 carriage with a bottom flange, standard length, precision accuracy grade, M6 grease nipple and pairing code C. Nothing else ships - the hardened profile rail, the screw set and the bolt caps are separate line items, and the mating rail must carry the same pairing letter C. F2 mounting exists for a reason: the fixing bolts pass up through the flange from underneath, leaving the block's top face completely clear for fixture plates, tooling or the workpiece itself. Inside, four rows of balls run at 45 degrees in X-shaped arc raceways, so the block self-aligns to slight seat errors and carries equal load up, down and sideways. Size 30 runs on a rail 28 mm wide.
Ratings per block: 37.4 kN dynamic, 55.0 kN static, moments 0.66 / 0.67 / 0.67 kN.m. Because the flange bolts from below, the mounting shoulder matters differently than on a square block, but the seating face still needs a corner radius no larger than 1 mm and the bolts must genuinely pull the flange flat - an unseated flange quietly throws away the accuracy grade you paid for.
| Model | Airtac LSH Linear Guide Block LSH30BK-F2N-P-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 | P — precision 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 listed 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. |
| P | P — precision 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.
A retrofit kit for a lathe cross-slide mounts the new table from below with F2 flanges, so the top face stays uninterrupted for the toolpost and easy to keep clear of swarf.
On a pick-and-place gantry retrofitted with new heads, bottom-flange blocks let the conveyor bridge and camera brackets bolt straight onto the unobstructed carriage tops.
A carton-erecting machine's glue-head slide uses underside-mounted flanges so glue pots and nozzles can sit directly on the block without adapter plates in the way.
Work through the choice in this order. First, form: you are buying the block only, so confirm the existing rail is an LSH30 with pairing code C. Second, size: 37.4 kN dynamic and 55.0 kN static cover most machine-tool and handling duties, but cantilevered loads are governed by the 0.66 kN.m MR limit - if that binds, a long carriage lifts moment capacity faster than stepping up a size. Third, envelope and duty: light loads in tight spaces point to LRM, whose ratings are unpublished, so we confirm them for you; short-travel strokes needing roller stiffness point to LGC. Finally check the list: carriage-only form, size by load and moment, F2 flange, standard length, one block, P accuracy, M6 nipple and pairing code C. Note that preload is selected when a complete set is ordered - this carriage code carries no preload position.
Quick checklist
C is 37.4 kN and C0 is 55.0 kN. The moment limits read MR 0.66, MP 0.67 and My 0.67 kN.m. P-grade parallelism spans 3 to 21 um across rail lengths. Its rail uses M8 bolts torqued to 3040 N.cm in steel, 2010 in cast iron, 1470 in aluminium. Lubrication: 5.4 cm3 at first fill, 1.7 cm3 top-ups, refreshed every 100 km or 3 to 6 months with Mobilux EP2 or an equivalent.
One F2 bottom-flange carriage, standard length, P accuracy, with an M6 nipple. No rail is included, so a first-time build also needs a matching LSH30 rail with the same pairing letter C, ordered separately. The pairing letter exists because rails and carriages are matched by grade and geometry; a replacement buyer finds it on the end face of the old rail or the old block's label.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.