Airtac LSH Linear Guide Block LSH20BK-F2N-P-C-M6
The AirTAC LSH Linear Guide Block LSH20BK-F2N-P-C-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
- AccuracyP — precision 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 Block LSH20BK-F2N-P-C-M6
One AirTAC LSH20 precision carriage, bottom-flange style, standard length, pairing code C, M6 grease nipple - and no rail in the box. This is a replacement block for an existing C-coded LSH rail, not a guide set. Its four rows of recirculating balls run at 45 degrees along X-pattern arc raceways, two points of contact per ball, which balances capacity across all four load directions and lets the block self-align against minor mounting error.
Ratings per block: 18.6 kN dynamic, 28.6 kN static, moments 0.27 kN.m MR and 0.25 kN.m MP and My, with precision-grade parallelism in the 3-21 um band scaled to the paired rail. A practical note on upkeep: the 100 km re-grease interval is shorter than it sounds - a 300 mm stroke cycling once per second reaches 100 km in roughly two weeks of continuous running, so distance, not the calendar, usually triggers the 0.6 cm3 top-up.
Airtac LSH Linear Guide Block LSH20BK-F2N-P-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-F2N-P-C-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 | 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 | P — precision 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 listed 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 Block LSH20BK-F2N-P-C-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. |
| 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. |
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 Block LSH20BK-F2N-P-C-M6 Is Used
Wire-forming machine guidance
A spring and wire-forming shop whose forming slide carriage has worn oval can replace just the C-coded block, restoring straight guidance for the wire feed without disturbing rail alignment.
Servo press fixture upgrade
Upgrading the die-change slide on a servo press: the bottom-flange fixing leaves the carriage top clear for the pressure plate, and the 28.6 kN static rating takes press shock and dwell.
High-cycle assembly shuttle
A rotary-indexer feed shuttle cycling a 300 mm stroke every second covers 100 km in about two weeks, so plan the 0.6 cm3 grease top-up by distance travelled rather than by the calendar.
Is the Airtac LSH Linear Guide Block LSH20BK-F2N-P-C-M6 the Right Guide?
Confirm you need the block alone. For lighter duty and tighter envelopes, LRM is the smaller step; we confirm its ratings with you since none are published. When the load overhangs the carriage, either go one size up to LSH25 standard (MR 0.44 kN.m, about 63 percent up on this block) or take this size in the long body, which lifts MR to 0.35 kN.m. Where the travel is short and crossed-roller rigidity is what the job needs rather than long recirculating travel, LGC is the alternative to price. Before you order, tick the list: form (block only), size checked against load and moment, carriage style and length, block count and rail length, accuracy and preload grades with the tighter-mounting trade-off noted, grease fitting, and the pairing letter - both halves must read C.
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 Block LSH20BK-F2N-P-C-M6 FAQ
Per carriage: C 18.6 kN dynamic, C0 28.6 kN static, moment ratings MR 0.27 kN.m and MP and My 0.25 kN.m. Accuracy grade P gives a 3-21 um running parallelism band, scaled to the paired rail's length. Rail screws M5, torqued 882 / 588 / 441 N.cm on steel / cast iron / aluminium. Lubrication 1.8 cm3 first charge and 0.6 cm3 top-ups, due every 100 km travelled or every 3 to 6 months.
The box holds one precision bottom-flange carriage with its M6 fitting - no rail, and not a complete guide. The C code is the pairing mark: an LSH carriage pairs correctly only with an LSH rail carrying the same letter, since the code ties the two halves to matched preload, accuracy and smoothness. Confirm the letter on your existing rail before ordering, or read it from the carriage you are replacing.
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 Block LSH20BK-F2N-P-C-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.