Airtac LGC Series Cross Roller Guide Rail LGC2R8
The AirTAC Airtac LGC Series Cross Roller Guide Rail LGC2R8 is a crossed roller guide using Ø2.0 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)
- SizeLGC2
- Roller diameterØ2.0 mm
- Rollers in cage8
- 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 LGC2R8
The LGC2R8 is a roller cage for AirTAC size 2 crossed roller guides, carrying eight 2.0 mm rollers whose crossed orientation turns ball-style point contact into stiff line contact along the hardened V-raceways. It is the cage subassembly alone - not a rail, not a complete guide, and no rail is supplied. LGC guides are non-recirculating, so the cage rides along with the slide, moving about half of whatever stroke the axis makes.
The rollers are rated 292 N dynamic and 290 N static, in N per roller - the catalogue never states a per-guide total, and capacity scales with the roller count rather than reducing to a single figure, so invite us to size your load. Eight rollers gives a small step in capacity over the six- and seven-roller cages while staying compact. Replacement is a dial-indicator job: the cage must be centred on the rail and the rail screws torqued progressively through the full stroke, so the accuracy you end up with is set at fitting as much as at ordering.
Airtac LGC Series Cross Roller Guide Rail LGC2R8 Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC2R8 |
|---|---|
| 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 | LGC2 |
| Roller diameter | Ø2.0 mm |
| Rollers per cage | 8 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Basic dynamic load rating C | 292 N per roller |
|---|---|
| Basic static load rating C0 | 290 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 LGC2R8
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 2 | Size code — sets the roller diameter (Ø2.0 mm). |
| R8 | Cage carrying 8 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, 8 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 LGC2R8 Is Used
Vision inspection camera stage
Camera focusing slides on automated vision systems use short-travel crossed roller guides. An eight-roller cage replacement removes the micro-stiction that shows up as focus hunting between frames.
X-ray equipment slide maintenance
The manufacturer lists the LGC family for the slide sections of X-ray equipment. Fitting a fresh eight-roller size 2 cage during scheduled service keeps the slide true and the imaging path repeatable.
Wafer metrology stage service
In wafer metrology fixtures, measurement repeatability depends on a clean, undamaged cage. Swapping the cage rather than the rails protects the matched set, the preload setting and the calibration record.
Is the Airtac LGC Series Cross Roller Guide Rail LGC2R8 the Right Guide?
Treat this code as what it is - a cage spare for an existing or new LGC2 guide, never a complete guide and never a rail. If the application needs long travel or a sealed, bolt-on recirculating unit, that is AirTAC LSH territory; if duty is very light and the envelope very small, step down to LRM. For LGC, work the checklist: cage form, size by roller diameter and cage count together (2.0 mm, eight rollers), row arrangement of the host guide, rail length taken from the maximum-stroke table with the working stroke deliberately shorter, accuracy grade (H stocked, P to order), and the clearance and preload method - adjusting screws, pressure plate or taper block - decided at design stage because it affects the surrounding machining. Then allow bench time for dial-indicator fitting; a carefully adjusted H set often outperforms a hastily fitted higher grade.
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 LGC2R8 FAQ
Roller diameter 2.0 mm; roller count 8; dynamic rating 292 N per roller; static rating 290 N per roller - the unit is N per roller in both cases. As a cage it has no rail length, row arrangement or accuracy grade; those describe the complete LGC2 guide, which is stocked in grade H with grade P available to order. Never multiply the per-roller figure by eight to get a total - capacity scales with the count in a way the catalogue does not reduce to one number. We are happy to size a specific load.
One roller cage assembly: eight 2.0 mm rollers held in their cage. There is no rail in the box and no slide - this is the spare subassembly, not a complete guide. It fits between the hardened raceways of an LGC size 2 guide, where the rollers carry load by line contact and never recirculate. Because accuracy is controlled as a matched set, keep the cage with its original rails and never mix rails from different sets. If a cage drifts, running the slide through several full strokes brings it back near centre.
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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 LGC Series Cross Roller Guide Rail LGC2R8
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