Airtac LSH Linear Guide Rail LSH20BK-F1N-N-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F1N-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 lengthStandard 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-F1N-N-B-M6
This is the economical half of a linear guide: an AirTAC LSH20 carriage in the F1 top-flange pattern, standard length, normal accuracy, M6 grease fitting, coded B to match a B-coded rail. No rail is supplied - the listing exists so a worn block can be replaced without buying a whole set. Four rows of recirculating balls sit in 45 degree X-arranged arc grooves with two contact points per ball, which balances capacity in all four load directions and lets small flatness errors in the machine bed be absorbed rather than fought. Here the 20 in LSH20 is also the true rail width in mm.
Normal grade running parallelism falls in a 12-37 um band depending on rail length - looser than high grade, and usually plenty for conveyance and handling axes. Capacity per block: 18.6 kN dynamic, 28.6 kN static, moments 0.27 / 0.25 / 0.25 kN.m MR / MP / My. Because a carriage-only purchase runs to roughly a quarter of a complete set's price, swapping the block is normally the cheap repair, provided the rail raceways are still clean and unworn.
Airtac LSH Linear Guide Rail LSH20BK-F1N-N-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F1N-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, top mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 18.6 kN per carriage |
|---|---|
| Basic static load rating C0 | 28.6 kN per carriage |
| Allowable static moment | MR 0.27 / MP 0.25 / My 0.25 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-F1N-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. |
| 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. |
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-F1N-N-B-M6 Is Used
Sorting line reject pusher
A pusher that diverts cartons off a sorting conveyor runs short strokes at high rate; replacing its worn carriage with this normal-grade block restores smooth travel at a fraction of a full set's cost.
Stretch wrapper mast guide
Pallet stretch wrappers run a carriage up and down a vertical mast all shift; when the film carriage starts to rock, swapping the block on the B-coded mast rail is a short, contained job.
Welding fixture clamp slide
Fixture builders use short guide rails to carry clamp slides; when a slide stiffens from swarf ingress, a fresh normal-grade carriage usually cures it without requalifying the whole fixture.
Is the Airtac LSH Linear Guide Rail LSH20BK-F1N-N-B-M6 the Right Guide?
Before ordering, judge the rail, not just the block: if its raceway is brinelled or rusted, a fresh carriage will never run well on it and a complete set is the better spend. If the rail is sound, this B-coded block drops on directly - LSH carriages interchange across rails of the same model, keeping their rated smoothness and accuracy. When the 12-37 um normal band is too coarse for the job, move to the high-accuracy version of this same carriage rather than upsizing. Where the load tips, remember one step up in size is potent: LSH25 raises MR from 0.27 to 0.44 kN.m, roughly 63 percent. Step down to LRM for light-duty compact builds (its load ratings are not published, so we confirm them for you), and look at LGC when travel is short and crossed-roller rigidity is what you need. Checklist: carriage-only form, size 20 by load and moment, F1 style, standard length, normal accuracy, M6 fitting, and pairing code B off the old part.
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-F1N-N-B-M6 FAQ
For the LSH20 standard carriage: dynamic rating C 18.6 kN, static C0 28.6 kN, allowable static moments MR 0.27 kN.m, MP 0.25 kN.m and My 0.25 kN.m. Normal accuracy grade runs at 12-37 um parallelism across the rail length bands. The mating rail uses M5 screws at 882 N.cm in steel, 588 N.cm in cast iron, 441 N.cm in aluminium. The block is delivered with 1.8 cm3 of Mobilux EP2 on board; top up 0.6 cm3 every 100 km of travel or every 3 to 6 months, whichever comes first.
No. The product is one F1 top-flange carriage in normal accuracy with an M6 fitting - the rail is a separate listing and this page must not be read as a complete guide set. The letter B is the pairing code: a carriage and rail are only supplied as a matched pair, for accuracy and preload, when the letters agree. Take the code from the stamp on your old block or the mark at the rail end and order the same letter.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LSH Linear Guide Rail LSH20BK-F1N-N-B-M6
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