Airtac LSH Linear Guide Rail LSH20BK-F2L-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F2L-H-D-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
- AccuracyH — high 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-H-D-M6
This SKU is the carriage half of an AirTAC LSH20 guide: one long bottom-flange block (F2) in high accuracy grade, coded to pairing letter D. NO RAIL IS INCLUDED - the hardened profile rail is ordered separately or already exists on your machine. F2 means the fixing bolts pass down through a flange on the underside, leaving the block's top face clear for fixtures, brackets or guarding. Inside, four rows of recirculating balls run in X-arranged arc raceways at a 45 degree contact angle with two contact points per ball, so loading up, down or sideways meets near-identical capacity, and slight mounting-surface error is absorbed inside the block instead of binding the balls. Size code 20 corresponds to a true rail width of 20 mm.
Because this is the long body, it carries 22.2 kN basic dynamic and 37.6 kN basic static per block, with allowable static moments of 0.35 (MR), 0.34 (MP) and 0.34 (My) kN.m - the long spec lifts moment about 30 percent over the standard LSH20 block while dynamic rating rises only about 19 percent, so a cantilevered gripper usually runs out of moment before it runs out of load capacity. The block ships pre-filled with Mobilux EP2 and takes an M6 nipple. To pair it with a rail, both parts must carry the letter D; read it off your original block or rail end before ordering.
Airtac LSH Linear Guide Rail LSH20BK-F2L-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F2L-H-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 | 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 | H — high 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-H-D-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. |
| 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. |
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-H-D-M6 Is Used
CO2 laser cutter Y-axis block swap
A workshop replaces a scored or rusty LSH20 block on its laser gantry. The F2 flange bolts from below, so the top face stays clear for the cutting-head bracket, and pairing code D ties the new block to the existing rail.
Cartesian pick-and-place Z-axis rebuild
Rebuilding the vertical slide of a gantry robot, the long carriage's 0.35 kN.m MR resists tipping from the cantilevered gripper - the long body adds about 30 percent moment over a standard block.
Optical metrology slide re-fit
A measuring-instrument rebuild needs H grade running parallelism of 7-28 um over the rail length, so the inspection slide tracks true without stepping up to precision grade.
Is the Airtac LSH Linear Guide Rail LSH20BK-F2L-H-D-M6 the Right Guide?
Confirm the form first: this is a block only, so if no sound rail exists, a complete LSH20 set or a rail-plus-carriage order is the better route. Size by moment as well as load - if the demand on MR creeps toward 0.35 kN.m, stepping up to an LSH25 block (0.44 kN.m standard) buys more moment for one part than any other change. Where the duty is light and the envelope small, LRM guides fit, but their load ratings are not published, so confirm them with us. For short travel where crossed-roller rigidity matters more than long recirculating travel, look at LGC instead. Match checklist: form (carriage only), size 20 by load AND moment, F2 bottom flange, long spec, accuracy H, grease fitting, rail length for the new rail, and pairing code D on both block and 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-H-D-M6 FAQ
Per carriage: basic dynamic load C 22.2 kN, basic static C0 37.6 kN, allowable static moment MR 0.35, MP 0.34 and My 0.34 kN.m. H-grade running parallelism spans 7-28 um depending on rail length. The rail mounts with M5 screws torqued to 882 N.cm in steel, 588 in cast iron, 441 in aluminium. Grease: 2.7 cm3 first charge per long carriage, 0.9 cm3 top-up, re-grease every 100 km of travel or every 3 to 6 months, whichever comes first.
One F2 long carriage, H accuracy, with an M6 grease nipple. No rail is included and none is implied - an LSH20 rail is a separate SKU. The letter D before the fitting code is the pairing code: carriages and rails sharing it are manufactured to work together. Before ordering, read the code stamped on your existing block or on the rail end and match it, otherwise fit and running quality are not guaranteed.
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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-H-D-M6
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