Airtac LGC Series Cross Roller Guide Rail LGC3R11
The AirTAC Airtac LGC Series Cross Roller Guide Rail LGC3R11 is a crossed roller guide using Ø3.0 mm precision rollers. Rollers are held in a cage in alternating orientation between hardened V-raceways, giving line contact instead of point contact — much higher rigidity and accuracy than a ball guide of similar size. It does NOT recirculate, so travel is set by rail length and the cage travels about half the stroke.
- SeriesLGC
- Supplied asRoller cage assembly (spare part)
- SizeLGC3
- Roller diameterØ3.0 mm
- Rollers in cage11
- 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 LGC Series Cross Roller Guide Rail LGC3R11
LGC3R11 replaces the roller cage in an AirTAC size 3 LGC crossed roller guide: 11 hardened rollers held in alternating crossed orientation between the V-raceways, giving line contact instead of the point contact of a ball, supplied as a spare part on its own. It is not a rail and not a complete guide, and no rail is included. Cage drift - where the cage shifts along the rail during use - is a documented behaviour of non-recirculating guides, driven by speed, acceleration, eccentric loading, vibration or uneven preload, and it is exactly why the manufacturer sells this spare.
The rollers are 3.0 mm size 3 rollers with catalogue ratings of 640 N dynamic and 610 N static each - per roller, with total capacity scaling by count rather than appearing as a single published number. One habit not to carry over from ball guides: here the static rating is slightly below the dynamic one, so do not size on the larger figure. And because the cage travels roughly half the slide distance in use, the replacement must match the roller count your set was built around - the count is part of the ordering code for precisely this reason.
Airtac LGC Series Cross Roller Guide Rail LGC3R11 Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC3R11 |
|---|---|
| Series | LGC Series Crossed Roller Guide |
| Supplied as | Roller cage assembly (spare part) |
| Construction | Crossed precision rollers in a cage, NON-recirculating, line contact |
| Size code | LGC3 |
| Roller diameter | Ø3.0 mm |
| Rollers per cage | 11 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Basic dynamic load rating C | 640 N per roller |
|---|---|
| Basic static load rating C0 | 610 N per roller |
| Mounting screws | Per catalogue tightening-torque table |
| Lubrication | Per catalogue; adjust clearance and preload before use |
| Interchangeability | LGC carriages fit LGC rails of the same model, matched by the pairing code |
Specifications follow the official AirTAC LGC catalogue. Load ratings are stated PER ROLLER, not per guide — total capacity depends on how many rollers the cage carries, which is why the roller count is part of the order code. Maximum stroke and tightening torques are given in the catalogue tables; ask us for the figure for your size. This item is a roller cage only — neither a rail nor a complete guide.
Model Code: Airtac LGC Series Cross Roller Guide Rail LGC3R11
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 3 | Size code — sets the roller diameter (Ø3.0 mm). |
| R11 | Cage carrying 11 rollers. |
| -H / -P | Accuracy grade: H high, P precision. |
What Is In The Box
| This order | Roller cage assembly (spare part) |
|---|---|
| Rail | No — not supplied with this item |
| Rollers and cage | Yes, 11 rollers |
This is the cage-and-rollers subassembly sold as a spare. It is NOT a rail and NOT a complete guide. 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 LGC Series Cross Roller Guide Rail LGC3R11 Is Used
Wafer inspection stage
Restoring an 11-roller cage on the fine positioning stage of a semiconductor wafer inspection station, where short, repeatable travel matters more than long reach.
Optical instrument calibration
Calibration of optical test instruments often involves stroking the slide through full travel; if that reveals drift or roughness, this cage is the part to renew.
X-ray detector slide service
Field service on the slide section of X-ray equipment, where carrying a matched 11-roller cage spare avoids a full guide replacement on site.
Is the Airtac LGC Series Cross Roller Guide Rail LGC3R11 the Right Guide?
Before ordering LGC3R11, diagnose: a cage that has merely drifted can usually be recentred by running the slide through several full strokes, so no part is needed - and on vertical installations leave extra stroke margin, because gravity drives drift in one direction. If the cage is genuinely damaged or worn, this 11-roller size 3 cage is the replacement, provided the count matches your set; never fit components across different sets, as LGC accuracy is controlled as a matched set. For new designs, use the full checklist instead: complete guide or cage spare; size by roller diameter and roller count together; three-row or four-row arrangement; rail length from the maximum-stroke table with the working stroke set shorter; grade H from stock or grade P to order; clearance method - adjusting screws for ordinary clearance, a pressure plate where rigidity and accuracy are required, a taper block for very high rigidity and accuracy; and dial-indicator adjustment planned into assembly time. If the actual requirement is long travel or a sealed bolt-on guide, compare LSH; for light duty in a small envelope, look at LRM.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Worst-case moment, not just straight load
- ✓ Travel length and mounting space
- ✓ Stroke shorter than the rail allows for cage travel
- ✓ Clearance method: screws, plate or taper block
- ✓ 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 Centre the roller cage on the rail during assembly.
- check Adjust with a dial indicator over the full stroke.
- check Never mix rails from different sets — accuracy is matched per set.
- check Installation by qualified personnel per AirTAC docs.
Airtac LGC Series Cross Roller Guide Rail LGC3R11 FAQ
Size 3 rollers of 3.0 mm diameter, 11 of them, rated 640 N dynamic and 610 N static per roller in the catalogue. No rail length, row type or accuracy grade belongs to this cage code - it is a spare subassembly only. Capacity of the finished guide scales with how many rollers share the load rather than being a combined published figure, so put specific sizing questions to us.
Not necessarily: running the slide through several full strokes usually recentres a drifted cage, since drift stems from speed, acceleration, eccentric loading, vibration or uneven preload rather than damage. Order LGC3R11 only if the cage is genuinely damaged or worn. Match the 11-roller count to your set and refit per the manufacturer's procedure; accuracy on LGC is controlled as a matched set, so components are never mixed between sets.
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 LGC Series Cross Roller Guide Rail LGC3R11
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.