The AirTAC LSH Linear Guide Block LSH30BK-F2N-P-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.
One precision-grade carriage, nothing more: the LSH30BK-F2N-P-D-M6 supplies a single size 30 F2 bottom-flange block, standard length, with M6 nipple and the pairing letter D. That D is a pairing code, not a preload grade - preload is only specified on complete-set codes, and this carriage-only code has no preload position at all. No rail is in the box. The block must land on an LSH30 rail, 28 mm wide, carrying the same D mark. Four rows of balls at 45 degree contact in crossed arc raceways give the block its equal-capacity, self-aligning behaviour, and the P accuracy grade tightens the running parallelism to a 3 to 21 um band.
Load and moment per carriage: 37.4 kN dynamic, 55.0 kN static, 0.66 / 0.67 / 0.67 kN.m MR/MP/My. The P grade is only realised if the rail underneath is seated hard against its datum and the M8 screws are torqued correctly; the catalogue is explicit that how flat the rail is pulled has a large effect on achieved accuracy, so a precision block on a carelessly bolted rail is money spent for nothing.
| Model | Airtac LSH Linear Guide Block LSH30BK-F2N-P-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 | 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 metrology lab's inspection camera slide is rebuilt with a P-grade block so the 3-21 um parallelism band keeps the sensor plane honest over the full stroke.
After years of service, a fibre laser cutting head's focus axis gets fresh precision blocks; re-pairing them by code restores the tuned alignment without replacing sound rail.
A wafer shuttle stage in a semiconductor tool needs repeatable, low-disturbance travel, so a like-for-like precision carriage replaces the worn unit during planned maintenance.
Because accuracy is the headline here, weigh the trade-offs around it. A precision block tolerates less installation error than a normal one once mated into a preloaded set, and the self-aligning feature absorbs only slight misalignment - check the allowable parallel and height errors for size 30 rather than assuming the geometry forgives anything. For pure precision in a short stroke, compare LGC crossed rollers; for light duty in a small envelope, LRM, whose load ratings are unpublished and which we confirm case by case. If moment governs - a long overhang on the carriage top - a long carriage or one size up buys more MR than this standard block. Order checklist: form carriage only, size 30 against both load and moment, F2 flange, standard length, one block, P grade, M6 nipple, pairing code D read off the original part.
Quick checklist
Dynamic load rating 37.4 kN; static 55.0 kN; allowable moments MR 0.66, MP 0.67, My 0.67 kN.m; running parallelism 3 to 21 um in P grade; mating rail screwed with M8 bolts at 3040 / 2010 / 1470 N.cm for steel, cast iron and aluminium seats; grease capacity 5.4 cm3 initially and 1.7 cm3 per top-up on a 100 km or 3-to-6-month cycle, whichever comes first.
No. In carriage-only codes that letter is the pairing code, which ties the block to rails carrying the same D mark. Preload never appears in a carriage-only code; it is selected when ordering a complete LSH set, and rigidity added that way always costs installation tolerance. What you receive here is one F2 carriage and no rail.
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