The AirTAC Airtac LSH Linear Guide Rail LSH30BK-F2N-N-D-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.
Ordered here as the block only: one AirTAC LSH30BK-F2N-N carriage with bottom-flange mounting, normal accuracy, standard length, an M6 grease port and pairing code D. No rail ships with it - the rail is a separate line item and must carry the same D letter. The recirculating circuit runs four ball rows on opposing 45 degree arc grooves, two-point contact per ball, so a load pressing down, pulling up or pushing sideways meets the same capacity, and small mounting errors are absorbed inside the block rather than forced onto the balls. For size 30 the mating rail is 28 mm wide - lay out the mating part from the drawing, never from the size number.
Static capacity is the headline here: 55.0 kN against 37.4 kN dynamic, near enough 1.5 to 1, with moment limits of 0.66 / 0.67 / 0.67 kN.m about MR, MP and My. Where a table can be loaded hard or slammed into its stops, that C0 figure deserves the first look. If moments rather than loads decide the design, stepping the whole axis up one size to LSH35 lifts MR from 0.66 to 1.05 kN.m - about 59 percent more from a single part - while a second block on the same rail instead tackles tipping along the direction of travel.
| Model | Airtac LSH Linear Guide Rail LSH30BK-F2N-N-D-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 | N — normal 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. |
| N | N — normal 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.
Die-change tables live with dropped tooling and shock loads; with C0 at 55.0 kN this block absorbs them, and ordering to the table rail's D letter makes the swap a straight bolt-on job.
A full-width machining-centre guard is heavy and rarely cycled, so static capacity and the grease reserve matter more than speed; a replacement block is specified to the door rail's pairing letter.
Converting a fixture base to under-mounted guides? The F2 flange takes its bolts from below, so no counterbored holes interrupt the working top face of the fixture.
Three confirmations, in order. Form first: this is a replacement block, letter D, and the rail comes separately. Size next: pair load and moment together, not load alone - LRM suits light, compact duties but publishes no ratings, so ask us to confirm them; LGC answers short-stroke jobs where crossed-roller stiffness beats long recirculating travel; the long LSH30L carriage or a step up to LSH35 answers moment-limited designs. Details last: bottom-flange F2 body for under-bolting, standard length, N accuracy, M6 nipple. And when the rail goes back down, installation matters as much as parts choice - a rail that is not pulled flat against its datum face and torqued to spec loses accuracy that no new block can recover.
Quick checklist
Per block: dynamic 37.4 kN, static 55.0 kN, moments 0.66 kN.m (MR), 0.67 kN.m (MP) and 0.67 kN.m (My). N accuracy keeps running parallelism between 12 and 37 um depending on rail length. Rail screws are M8 at 3040 N.cm in steel, 2010 N.cm in cast iron, 1470 N.cm in aluminium, with a 6.5 mm shoulder and corner radius up to 1 mm. Grease: 5.4 cm3 initial charge, 1.7 cm3 refill, repeated every 100 km of travel or every 3 to 6 months.
A single F2 bottom-flange carriage, size 30, standard length, normal accuracy, M6 fitting - and no rail of any kind. Fitment is controlled by the pairing letter: rails and carriages each carry one and they must agree, so note the D stamped on your rail and order to it. An LSH30 carriage will not run on another maker's rail; it is matched within the LSH family only.
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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.