Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6 is a standard-type profile linear guide on a 20 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 asCarriage / block only
- SizeLSH20
- Rail width20 mm
- Carriage lengthLong carriage
- AccuracyN — normal grade
- 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 LSH20BK-F2L-N-B-M6
One carriage only is supplied here: an AirTAC LSH20 long bottom-flange block, normal accuracy grade, greased via an M6 nipple, matched to pairing letter B. There is no rail in this box and this code never implies one. The block carries its load on four rows of recirculating balls seated in X-shaped arc raceways cut at 45 degrees, two points of contact per ball, which evens out the capacity in all four loading directions and lets the block self-align against minor machining error in the mounting face. Size 20 means a 20 mm wide rail - the code matches the width only on this and size 15.
The economics are the headline: a carriage alone typically costs about a quarter of a complete set, so when a machine's block wears out but the rail still runs smooth, replacing just the block is the cheap repair. The figures hold up too - 22.2 kN dynamic, 37.6 kN static and 0.35 / 0.34 / 0.34 kN.m of moment per long block, the long body adding about 30 percent moment over the standard LSH20 spec. N grade gives a 12-37 um running parallelism band, adequate for general machine building where the rail length sets the exact value.
Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Flange, bottom mounting |
| Carriage length | Long carriage |
| Basic dynamic load rating C | 22.2 kN per carriage |
|---|---|
| Basic static load rating C0 | 37.6 kN per carriage |
| Allowable static moment | MR 0.35 / MP 0.34 / My 0.34 kN·m |
| Accuracy grade | N — normal grade |
| Mounting screws | M5 — 882 N·cm into steel, 588 cast iron, 441 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.
Model Code: Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| BK | Carriage / block only — no rail supplied. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| L | Long 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. |
What Is In The Box
| 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.
Where the Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6 Is Used
Workshop router upgrade to long blocks
A hobby-to-light-pro router table is upgraded from standard to long carriages: same 20 mm rail, but moment capacity jumps about 30 percent to 0.35 kN.m, steadying the spindle mount at the end of its arm.
Pallet conveyor gate slide spare
A parts-plant keeps this N-grade block as the spare for the sliding stop gate on its pallet loop - a worn block swaps out for roughly a quarter of the cost of a full guide set.
Machine guard door slide
A guard door running on a vertical LSH20 rail is re-carriaged with this F2 block; bolts through the underside flange leave the outer face clean for the door panel and its handle hardware.
Is the Airtac LSH Linear Guide Rail LSH20BK-F2L-N-B-M6 the Right Guide?
Before buying a block on its own, run a finger and a straightedge over the existing rail: if the raceways are pitted or the running feel is notchy, replace the complete set instead, since a new block will not rescue a damaged rail. If the duty is genuinely light and space tight, LRM is the smaller alternative, but we confirm its ratings because they are not published. Short, stiff strokes suit LGC's crossed rollers. For overhanging loads beyond this block's 0.35 kN.m MR, step up a size to LSH25 rather than adding preload. Checklist: form (carriage only), size 20 by load and moment together, F2 bottom flange, long spec, N accuracy, M6 fitting, rail length for any companion rail, and pairing code B matching the rail.
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 LSH20BK-F2L-N-B-M6 FAQ
Per long carriage: basic dynamic load rating C 22.2 kN; basic static C0 37.6 kN; allowable static moment MR 0.35, MP 0.34, My 0.34 kN.m; N-grade running parallelism 12-37 um across the rail length bands; rail fixing M5 screws at 882 N.cm (steel), 588 (cast iron), 441 (aluminium); Mobilux EP2 grease, 2.7 cm3 first charge, 0.9 cm3 top-up, re-grease every 100 km of travel or 3 to 6 months, whichever comes first.
It is the carriage only - the rail is a separate item and is not included. The B at the end of the spec section is the pairing code that matches carriages to rails of the same LSH model. Read the code off your old block or the rail end and order the same letter. If the letter is worn away, tell us the machine and the approximate rail length and we will help identify it before you order.
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 LSH20BK-F2L-N-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.